McQuay Water Source Heat Pumps Large Vertical and Extended Range Unit Sizes 6 to 25 Tons Large Horizontal and Extended Range Unit Sizes 6 to 10 Tons

Transcription

1 Catalog C: McQuay Water Source Heat Pumps Large Vertical and Extended Range Unit Sizes 6 to 25 Tons Large Horizontal and Extended Range Unit Sizes 6 to 10 Tons

2 MANUFACTURER CERTIFIED TO ARI AS COMPLYING WITH Table of Contents Performance data... 3 Water Loop - Large Vertical... 3 Water Loop - Large Horizontal... 3 Ground Loop - Large Vertical... 4 Ground Loop - Large Horizontal... 4 Model nomenclature... 5 Design features Large Vertical features... 7 Large Horizontal features... 8 Field installed accessories... 9 Control features Mark IV control sytem Loop Water controller MicroTec Application systems Cooling & Heating Refrigeration cycles Geothermal - Boiler Tower Geothermal - Open Loop Well Geothermal - Closed Loop Geothermal - Horizontal Loop Geothermal - Vertical Loop Geothermal - Surface Water Loop Capacity data - Vertical Unit Size 0 at 2,300 cfm - Cooling Size 0 at 2,300 cfm - Heating Size 108 at 3,0 cfm - Cooling Size 108 at 3,0 cfm - Heating Size 121 at 4,000 cfm - Cooling Size 121 at 4,000 cfm - Heating Size 1 at 6,000 cfm - Cooling SIze 1 at 6,000 cfm - Heating Size 215 at 7,200 cfm - Cooling Size 215 at 7,200 cfm - Heating Size 290 at 9,6 cfm - Cooling Size 290 at 9,6 cfm - Heating Capacity data - Horizontal Unit Size 0 at 2,400 cfm - Cooling Size 0 at 2,400 cfm - Heating Size 090 at 3,000 cfm - Cooling Size 090 at 3,000 cfm - Heating Size 120 at 4,000 cfm - Cooling Size 120 at 4,000 cfm- Heating Airflow correction factors Operating limits Fan performance data Vertical Unit Sizes 0 & 108, Vertical Unit Sizes 1 & 215, Horizontal Unit Sizes 0, 090, Electrical data Physical data Dimensional data Large Vertical Unit Large Horizontal Unit Wiring diagrams Mark IV - Lrg Vert Mark IV - Lrg Vert ( //3) Mark IV - Lrg Horiz ( //3) Mark IV - Lrg Vert (4//3) Mark IV - Lrg Horiz (4//3) MicroTech Lrg Vert MicroTech Lrg Vert MicroTech Lrg Horiz Engineering guide specifications Large Verical Unit Large Horizontal Unit WATER TO AIR BRINE TO AIR ISO STANDARD R HEAT PUMPS McQuay is a registered trademark of McQuay International. McQuay International 200 All rights reserved throughout the world. The information in this catalog supersedes and replaces previous (catalogues) with regards to McQuay Terminal Air Conditioning products. Illustrations cover the general appearance of McQuay products at the time of publication and McQuay reserves the right to make changes in design and construction at anytime without notice. Page 2 of 52 / Catalog 11

3 Performance Data Water Loop - Large Vertical Unit (Rated in accordance with ISO Standard ) Unit Airflow Waterflow Cooling Heating Voltage Size CFM L/S GPM L/S BTU/HR Watts EER COP BTU/HR Watts COP Water Loop - Large Horizontal Unit (Rated in accordance with ISO Standard ) Unit Airflow Waterflow Cooling Heating Voltage Size CFM L/S GPM L/S BTU/HR Watts EER COP BTU/HR Watts COP NOTES: EER=Energy Efficiency Ratio COP= Coefficient of Performance Cooling capacity is based on.6 F d b, 66.2 F wb entering air temperature and 86 F entering water temperature. Heating capacity based on 68 F db entering air temperature and 68 F entering water temperature. Vertical unit sizes 1 thru 290 are not ARI certified since they exceed 135,000 Btu/hr for standard 3 50 cycle units are derated cycle units, and are not ARI certified. Page 3 of 52 / Catalog 11

4 Performance Data Ground Loop - Large Vertical Unit (Rated in accordance with ISO Standard ) Unit Airflow Waterflow Cooling Heating Voltage Size CFM L/S GPM L/S BTU/HR Watts EER COP BTU/HR Watts COP Ground Loop - Large Horizontal Unit (Rated in accordance with ISO Standard ) Unit Airflow Waterflow Cooling Heating Voltage Size CFM L/S GPM L/S BTU/HR Watts EER COP BTU/HR Watts COP NOTES: EER=Energy Efficiency Ratio COP= Coefficient of Performance Cooling capacity is based on.6 F db, 66.2 F wb entering air temperature and 77 F entering, 95 F entering water temperature. Heating capacity based on 68 F db entering air temperature and 32 F entering water temperature. Vertical unit sizes 1 thru 290 are not ARI certified since they exceed 135,000 Btu/hr for standard 3 50 cycle units are derated cycle units, and are not ARI certified. Page 4 of 52 / Catalog 11

5 Model Nomenclature NOTE: For Illustration purposes only. Not all options available with all models. Please consult a McQuay Sales Representative for specific availability. McQuay WSHP Product Nomenclature W LMS 1 0 D Z Product Category W = WSHP Product Identifier L** = Vertical C** = Horizontal Design Series 1 = A Design 2 = B Design 3 = C Design 4 = D Design 5 = E Design Coil Options (None) Voltage D = E = 208//1 1 F = //3 1 H = J - 265//1 1 K = 4--3 L = M = 230/50/1 1 N = Nominal Capacity 0 =, = 90, = 108, = 120, = 121, = 1, = 215, = 290, Horizontal Only 2 Vertical Only McQuay Large Vertical WSHP Product Identifiers LDD = Large Vertical/DDC Controls/Std. Range/Std. Static/Less Board LDE = Large Vertical/DDC Controls/Ext. Range/Std. Static LDG = Large Vertical/DDC Controls/Geothermal LDL = Large Vertical/DDC Controls/Ext. Range/Std. Static/Less Board LDS = Large Vertical/DDC Controls/Std. Range/Std. Static LMB = Large Vertical/Mark IV/Geothermal/High Static LME = Large Vertical/Mark IV/Ext. Range/Std. Range LMG = Large Vertical/Mark IV/Geothermal LMH = Large Vertical/Mark IV/Std. Range/High Static LML = Large Vertical/Mark IV/Ext. Range/High Static LMS = Large Vertical/Mark IV/Std. Range/Std. Static McQuay Large Horizontal WSHP Product Identifiers CAG = Ceiling mtd./bacnet Controls/Geothermal CDD = Ceiling mtd./ddc Controls/Etd. Range/Less board CDE = Ceiling mtd./ddc Controls/Ext. Range CDG = Ceiling mtd./ddc Controls/Geothermal CDL = Ceiling mtd./ddc Controls/Std. Range/Less board CDS = Ceiling mtd./ddc Controls/Std. Range CME = Ceiling mtd./mark IV/Ext. Range CMG = Ceiling mtd./mark IV/Geothermal CMS = Ceiling mtd./mark IV/Std. Range Page 5 of 52 / Catalog 11

6 McQuay High Efficiency Water Source Heat Pumps: Large Vertical Features: 6 thru 25 tons Standard range (55 F to 110 F) or extended range/ geothermal (25 F to 110 F) application flexibility. Performance rated with ISO standard Safety agency listed with CETL or CE. Dual compressors on unit sizes 1 and larger. Multiple access panels. Two unique configurations. Belt driven multiple fans. Factory run tested for reliability. Mark IV/AC or MicroTech 2000 controls. 50 cycle units. Large Horizontal Features: 6 thru 10 tons. Standard range (55 F to 110 F) or extended range/geothermal (25 F to 110 F) application flexibility. Dual circuit. Outstanding part load performance. Performance rated with ISO Standard Safety agency listed with CETL or CE. Easy access to compressor and fan sections. Adjustable sheaves for fine tuning. Mark IV/AC or MicroTech 2000 controls. Circuit board control system for clean wiring. Freezestat enhanced water circuit. Factory run tested for reliability. All 50Hz units are CE listed Unit Sizes 0, 090 and 120 Unit Sizes 0, 108 and and featuring Mark IV/AC controls. Built-in night setback, load shed and shutdown Built-in 2-hour override from stat Compressor short cycle protection Random start Timed delay RV operation LED readout Pump restart signal Condensate overflow protection Brownout protection Automatic defrost cycle Optional boilerless system control Unit Sizes 1, 215 and 290 Page 6 of 52 / Catalog 11

7 Large Vertical Design Features Large vertical water source heat pump units are easily located in small equipment rooms or floor-by-floor installations. They can be applied to all building types where it is advantageous to extend the water source heat pump concept to larger or core areas. Each heat pump is factory assembled and run tested for reliability. Service is accomplished through multiple front, back and side access panels. Access is available to all serviceable components. Each unit ships on a wooden skid and covered with plastic to facilitate moving with a fork truck. Two unique frame sizes make up our 6- through 25-ton product line - each with a consistent shape for easy layout of the ductwork, water piping, condensate piping and electrical connections. Units are constructed of G- unpainted galvanized steel. The interiors of all framework and panels are covered with 1/2" thick, 1 1 / 2 lb. density coated glass fiber insulation. Multiple 1" filters are supported by factory-mounted brackets for side removal in either direction. Electrical components are located in the lower section, adjacent to the compressor(s). Knockouts are provided on both sides of the unit to facilitate main power and low voltage wiring through separate holes. Each unit is rated to accept time delay fuses for branch circuit overcurrent protection. Each unit is listed with CETL and CE. The control box is accessible through the compressor section access panel. The control box houses the major operating electrical controls, including the control circuit board(s), transformer, compressor contactor(s), fan contactor(s) and terminal block. Each component is accessible for service or replacement. The Mark IV/AC control system offered with units includes a printed circuit board that allows for quick-connect wiring to controlled components for clean wiring. The Mark IV/AC board has built-in terminal strip for low voltage wiring connection. See Controls section for additional information. copper tubes and aluminum fins. Extended range units include coil and piping insulation to protect against condensation in low temperature geothermal applications. Safety controls on each refrigerant circuit include low suction temperature (freezestat), low refrigerant pressure and high pressure switches to lock out compressor operation at extreme conditions. The safety controls can only be reset from the main disconnect switch to prevent unauthorized reset. Each circuit has high and low side refrigerant service valves for refrigerant circuit diagnostics and charging. Thermal Expansion Valve Units include a Thermal Expansion Valve (TXV) for refrigerant metering. The TXV allows the unit to operate at optimum efficiency with fluid temperatures ranging from 25 F to 110 F, and entering air temperatures ranging from 40 F to 90 F. The TXV precisely meters the exact amount of refrigerant flow through the system to meet the load and deliver rated heating and cooling capacity. Fan section The fan section includes a belt-driven fan assembly, multiple DWDI forward curved fan wheels, solid fan shaft, steel ball bearings, three phase fan motor, adjustable motor sheave, adjustable motor base, fan pulley and insulated divider panel between the compressor section. Unit sizes 0 through 121 have two fan assemblies and unit sizes 1 through 290 have three fan assemblies. The fan motor is always located at the piping end, but may be relocated to the opposite side in the field. Unit arrangement One fan discharge arrangement and two piping arrangements are available. With the return air side defined as the front of the unit, the water piping connections may be right-hand (side) or left-hand. All units have a single supply and return water connection with a copper FPT type fitting that protrudes through the unit casing for easy connection. The condensate connection is also a copper FPT type and is located on both sides of the unit. The unused connection is plugged. The main control panel is located in the center front of the unit. The fan discharge is top front, and the fan motor is always located at the piping end. Unit sides opposite the control panel and opposite the piping side may be up against walls and still allow for service and maintenance through the remaining access panels. Side View From Piping End Refrigeration system Sizes 0 through 121 have a single refrigerant circuit. Sizes 1 through 290 have dual independent circuits. Each circuit includes a hermetic compressor, reversing valve, waterto-refrigerant coaxial heat exchanger, electronic expansion valve, airside coil, sightglass and safety controls. The compressor is located adjacent to the compressor access panel and isolated from a bottom panel with rubber isolators. The reversing valve is energized in the heating mode and will fail-safe to the cooling mode, which is the predominant mode of operation. Both heat exchanger components incorporate advanced heat transfer technologies. The coaxial heat exhanger has a copper inner tube and steel outer tube. The large face area coil has Piping Factory Installed options Optional fan motors are available on each unit size to handle increased CFM and static pressure applications. M M Control Box Location Fan Motor Piping Page 7 of 52 / Catalog 11

8 Large Horizontal Design Features McQuay 6- to 10-ton horizontal units have a common cabinet size and common water, condensate, and duct connection locations for easier and more efficient installation. The cabinet is constructed of unpainted, G- galvanized steel. Large panels provide access to the fan/motor compartment and the compressor/control compartment. The interiors of the top and side panels and the bottom of the unit are covered with 1/2" thick, 1 1 / 2 lb. density coated glass fiber insulation. The filter is supported by a factory-mounted combination filter rack and return air duct collar, eliminating the need for field-mounted brackets. The water and condensate connections protrude through the outside of the cabinet. The water connections are FPT type for easy connection to flexible hoses. The large condensate connection provides effective condensate removal. The electrical components are located in the compressor section of the unit. Holes are provided on the cabinet to facilitate main power and low voltage control wiring through separate holes. All wiring connections are made internal to the cabinet for maximum safety. Each unit is rated to accept time delay fuses for branch circuit and is protected by a resettable circuit breaker. Two unique control systems are offered for these units - Mark IV/AC and MicroTech Both controls use a printed circuit board for quick-connect wiring to the controlled components. The control board receives power from a 50 VA transformer and/ or a 75 VA transformer. A terminal strip is supplied for low voltage control wiring connection. See Controls section for additional information. Refrigeration system Units have a dual circuit design and the two circuits operate independently to enable load shedding when conditions allow. Each circuit employs a random start feature to prevent both compressors from energizing simultaneously after an unoccupied cycle. Units contain two of each refrigerant system component, including high efficiency compressors, plate-to-plate heat exchangers, reversing valves, expansion valves, high/low side refrigerant service valves, and required safety controls. Large access panels are provided for easy service access to any of these components. The reversing valves are energized in the heating mode and will fail-safe to the cooling mode, which is the predominant mode of operation. The air-to-refrigerant coil is a dual circuit coil on one slab. It is split equally along the horizontal axis for maximum efficiency. The fins are lanced and the tubes have finned edges on the in- side to enhance heat transfer capabilities. Extended range units include coil and piping insulation to protect against condensation in low temperature geothermal applications. Safety controls include low suction temperature (freezstat) and high pressure switches to lock out compressor operation at extreme conditions. The safety controls can only be reset from the main disconnect switch - not from the wall thermostat. For additional safety, each unit has a 7 psi (48 kpa) low pressure switch to protect the compressor from low refrigerant charge. The low setting prevents nuisance trips while providing adequate protection. Thermal Expansion Valve Units include a Thermal Expansion Valve (TXV) for refrigerant metering. The TXV allows the unit to operate at optimum efficiency with fluid temperatures ranging from 25 F to 110 F, and entering air temperatures ranging from 40 F to 90 F. The TXV precisely meters the exact amount of refrigerant flow through the system to meet the load and deliver rated heating and cooling capacity. Fan section The fan section includes the fan housing, fan wheel, fan motor, adjustable sheave, high strength V-belt, and drain pan. The drain pan is made of G- galvanized steel and is insulated from the cabinet. This pan has ample height to allow self-priming of the condensate trap. The fan motor is a single speed PSC type with an adjustable sheave for field adjustment. The motor is isolated from the fan housing for minimum vibration transmission. The fan housing has a removable orifice ring on the housing to accommodate fan wheel removal without disconnecting the unit from the ductwork. The fan housing protrudes through the cabinet to provide adequate material to connect to a flexible duct. The fan discharge can exit from the end or the side of the unit and must be configured at the factory. Optional factory installed features Extended range units are available for applications requiring heating operation at reduced entering conditions. The extended range unit will operate at 25 F (5 C) minimum entering water temperature, 40 F (5 C) minimum entering air temperature. Page 8 of 52 / Catalog 11

9 Field Installed Accessories Wall mounted thermostats are available for automatic or manual changeover. All include fan switch for constant on operation or automatic for cycle operation with the compressor. All thermostats are 24-volt type and have dual Fahrenheit and Celsius temperature setpoint scales. Thermostat accessories include universal guard, locking cover, and adapter plate to convert from horizontal to vertical junction box mounting. Individual thermostats include: Standard Manual Changeover Single setpoint lever for one stage heating and cooling. System heat-off-cool switch and fan on-off switch. Non Programmable Electronic Premier white, mounts horizontal, system switch; Off-Heat-Auto-Cool and fan switch; On-Auto. Standard Manual & Automatic Changeover Dual setpoint levers for one stage heating and one stage cooling operation. System heat-off-auto-cool switch and fan on-auto switch. Includes LED for fault. 7-Day Programmable Electronic Thermostat Selectable for either two-stage heat, two-stage cool or two stage heat pump and auto changeover operation. 7-day programming program each day individually (four time/temperature changes) or program one day and copy the entire week. Features include, large backlit Liquid Crystal Display (LCD) and precise temperature display. Auto or manual changeover, programmable fan, key pad lockout, adjustable deadband, integral four minute anti-short cycle protection, and is Title 24 compliant. A Remote wall sensor is available with this thermostat. Deluxe Automatic Changeover Dual setpoint levers for one stage heating, one stage cooling, one stage night setback operation. Night setback temperature setpoint is 12 F (-6.6 C) below daytime heat setting. System off-auto switch and fan on-auto switch. Override switch (spring loaded fan switch) puts unit back into occupied daytime heat and cool setpoints. Includes LED for fault. Programmable Micro-electronic Manual & Automatic Changeover One-stage heating, one-stage cooling, night setback, night setup and day/night time clock operation. Features include 7-day programmability, four settings per day, keyboard lock code, time delay and adjustable deadband. System heat-auto-cool-off and fan on-auto switches. Hose Kits Supply and return water hoses are available as standard or fire-rated construction in 2 and 3 foot lengths. Standard construction hoses are made of rubber hose and steel fittings. Firerated hoses have synthetic poly-mer core with an outer rated covering of galvanized steel. Fittings are steel. Assembly is firerated and tested according to UL 94 with a V0 rating and ASTM 8 Each hose has MPT connections. Standard fire-rated hoses have a swivel connection at one end. Combination balancing and shutoff (ball) valves are constructed of brass and rated at 2750 kpa maximum working pressure. Valves have a built-in adjustable memory stop to eliminate rebalancing. Valves have FPT connections on both ends for connection to the water hose and to the field piping. Page 9 of 52 / Catalog 11

10 Control Features Mark IV/AC control system The Mark IV/AC control system is a microprocessor-based control board conveniently located in the unit control box for accessibility. A 14 pin low voltage terminal strip provides all the necessary terminals for field connections. LED s are located in front for quick inspection. The board can be wired for 24 volt AC output to the wall thermostat by using terminals R & C. If a DC voltage output to the thermostat is required, use terminals F & V. This allows the customer a choice of control output voltage to accommodate controls by others or accessories. The Mark IV/AC control system has the following operating features (assumes cycle fan operation-not continuous): Start-up The unit will not operate until all the inputs and safety controls are checked for normal conditions. Cooling mode On a call for cooling, the compressor and fan will start 0 to 32 seconds later. When satisfied, the compressor and fan shut off immediately. Heating Mode On a call for heating, the reversing valve is energized after seconds and the compressor and fan start immediately. When the load is satisfied, the compressor and fan shut off immediately. The reversing valve is deenergized seconds later to eliminate swish noise and to allow the compressor to always start up at equalized pressure. Short Cycle Protection & Random Start Each time the compressor stops, a new random compressor start delay time between 1 and 212 seconds is generated. This prevents compressor short cycling and prevents units from starting simultaneously after coming back from an unoccupied cycle. Unoccupied Mode A simple grounded signal, no power source required, puts the unit into the unoccupied mode for night setback operation. The fan shuts off and the unit is put under control from the setback bulb of the thermostat. The day heating thermostat control and cooling is locked out. A unique LED status is generated for indication of the unoccupied mode. On a call for heating, the fan and the compressor will start after seconds. Override Mode A switch on the deluxe thermostat can be activated during the unoccupied mode to put the unit back into the occupied mode for two hours for after-hours heating or cooling. Pump Restart A signal from the Mark IV/AC board to our Loop Control Panel will restart the water circulating loop pump when the compressor is energized. The signal can be daisy chained between 200 units. Load Shed Again, a simple grounded signal puts the unit into the load shed mode. The compressor shuts off and the fan will start on a call for heating and cooling. A unique LED status is generated for indication of the load shed mode. Brownout Protection The Mark IV/AC board measures the input voltage and will suspend compressor and fan operation if the voltage falls below % of the normal line voltage. A unique LED status is generated and output is available to a fault LED at the thermostat. Unit Shutdown Again, a simple grounded signal puts the unit into the shutdown mode. Compressor and fan operations are suspended. A unique LED status is generated and an output signal is made available for connection to a fault LED at the thermostat. Condensate Overflow Protection The Mark IV/AC board incorporates a liquid sensor at the top of the drain pan. Sensing water, cooling operation is suspended. A unique LED status is generated and output is available to a fault LED at the thermostat. Heating operation is not suspended. Safety Control The Mark IV/AC board receives separate input signals from the refrigerant high pressure switch and the low suction temperature (freezestat) switch. In a high pressure situation, compressor operation is suspended. In a low temperature situation, the unit goes into a defrost cycle where the unit is put into cooling operation for seconds until the coaxial heat exchanger is free of ice. Each switch generates its own unique LED status and output is available to a fault LED at the thermostat if either situation exists. Mark IV/AC LED Fault Outputs Indication LED S Fault Yellow Green Red Output Normal Mode Off On Off Off High Pressure Fault Off Off Flash On Low Temperature Fault Flash Off Off On Condensate Overflow On Dim Off On Brownout Off Flash Off On Load Shed Off Off On Off Unoccupied Mode On On Off Off Unit Shutdown Off Flash Off On The Mark IV/AC control system allows for the following optional field installed controls and accessories: Boilerless System Kit Eliminates the need for a boiler in the system water loop. The boilerless system control board senses the entering water temperature to the unit and locks out compressor heating operation if the water temperature falls below the adjustable setpoint. Contacts are provided to energize a field supplied electric heater downstream of the unit on a call for heating. Motorized Valve Used for variable pumping applications. The valve is wired in the compressor circuit and the valve is piped in the return water line from the unit. The valve opens when the compressor is on and closes when the compressor is off. Valve is rated for 300 psig (20 kpa). Page 10 of 52 / Catalog 11

11 Loop Water Controller The Loop Water Controller (LWC) is a stand-alone, factory programmed and tested microprocessor-based controller providing control of the heat rejection/heat addition stages and the water circulating pumps for control of a water source heat pump system through solid-state output relays. The controller includes a keypad and display to view all status conditions, temperatures, setpoints and alarm conditions. The display is two lines by sixteen columns and supports a supertwist LCD format. The LWC is designed to be used with the Mark IV unit controllers for standalone operation of the water loop. The LWC does not support serial communications with a higher lever BAS. The LWC can be used in any of the following applications: a traditional single loop system, a closed-circuit evaporative cooler, boiler, primary pump and standby pump system, or a two-loop system with the heat pump loop having a boiler, primary pump and standby pump separated by a water-to-water heat exchanger to a condenser water loop with an open cooling tower, primary (stage 1) pump and a standby (stage 2) pump. The pumps can be operated as auto or manual lead-lag. Pump sequencing allows the standby pump to automatically come on upon failure of the lead pump as indicated by a flow switch. The LWC can control heating and cooling stages from the heat pump loop supply temperature and from the outdoor air temperature for reset of the heat addition setpoint. Other temperatures that can be monitored include: the heat pump loop return temperature, entering and leaving tower temperatures, entering and leaving boiler temperatures, and the storage tank temperature. Clock schedule outputs are built-in to (1) control the heat pump circulating pump for shutdown at night (can be restarted if outdoor air temperature falls below the setpoint) and (2) provide programmable time schedules for heat pump unit occupied/unoccupied operation. A maximum of six time clock schedule outputs are available. Two LWC models are available. LWC-16 and LWC-24 provide 9 and 17 configurable outputs, respectively, choosing between heat rejection (cooling) stages, heat addition (heating) stages and time clock schedules. Each heating and cooling output has individual on and off (differential) setpoint adjustment capability. Modulating heating and cooling output signals are available to control tower bypass and two-way or three-way boiler heat addition valves. Monitored system points include visual and audible notification of low water temperature, high water temperature, or no flow conditions. When an alarm condition occurs, the LWC closes contacts which can be tied to an emergency shutdown signal. A remote alarm panel is available for alarm notification at a remote location. The LWC interfaces with Mark IV/AC controlled heat pump units for a low cost control system. The Mark IV/AC board can receive occupied/unoccupied time clock schedule outputs and an emergency shutdown signal due to an alarm condition. The LWC can receive a signal (pump restart) from the Mark IV/ AC board to energize and override the main circulating pump (if it is scheduled off) whenever a compressor operates from a call for night setback heat or from a call for heating or cooling during the two-hour override cycle. Simple daisy chain wiring is required between Mark IV/AC board terminals on each water source heat pump. Additional features include a built-in test mode to simulate all control modes, a pre-cool cycle to enable heat rejection earlier for undersized boilers, a preheat cycle to enable heat addition earlier for undersized towers, keypad password protection, and holiday scheduling. The LWC panel is not designed to communicate with a higher level BAS. Mark IV/AC Interface Inputs Heat Pump Supply Loop Temperature Heat Pump Loop Flow Switch Outside Air Temp Optional Temperature Sensors Optional Condenser Loop Flow Switch Optional Condenser Loop Temperature Loop Water Controller Unit Shutdown Unoccupied Schedule Pump Restart Outputs Heat Pump Loop Pumps Condenser Loop Pumps Heat Rejection Stages Modulating Heat Rejection Heat Addition Stages Modulating Heat Addition Optional Personal Computer Mark IV/AC Board Terminals P = Pump Restart C = Common U = Unoccupied E = Unit Shutdown L = Load Shed F = Fault Relay Relay Pump Restart F P C U E L F P C U E L Mark IV/AC Board O W2 G W1Y1 R A Additional Unoccupied Schedules 6 total Mark IV/AC Board O W2 G W1Y1 R A } Pump Restart Unoccupied Unit Shutdown Optional Load Shed Input Thermostat O = 2-Hour Override W2 = Net Setback Heating G = Fan W1 = Day Heating Y1 = Cooling R = Power AC Volts A = Attitude Fault Signal to LED Deluxe Auto Changeover Wallstat Deluxe Auto Changeover Wallstat Page 11 of 52 / Catalog 11

12 MicroTech 2000 Controller Each McQuay Large Vertical and Horizontal water source heat pump can be equipped with a MicroTech 2000 water source heat pump unit controller. The controller is microprocessor-based and is designed to communicate over a LonWorks communications network. The unit controller is factory programmed and tested with all the logic required to monitor and control the unit. The controller sets the unit mode of operation, monitors water and air temperatures, and can communicate fault conditions to a LonWorks communications network. The MicroTech 2000 unit controllers include unit-mounted return air, discharge air and leaving water temperature sensors. Options include a tenant setpoint adjustment knob and tenant override button, and the capability of substituting the return air sensor with a wall-mounted room sensor. MicroTech 2000 heat pumps are designed to be linked with a centralized building automation system through a LonWorks communications network for centralized scheduling and management of multiple heat pumps. Wall-mounted room sensors are available to control the heating and cooling operation of each MicroTech 2000 Water Source Heat Pump Unit Controller. Available room sensors include: room sensor with LED status and tenant override button, room sensor with LED status, timed-override button, and bi-metal thermostat, room sensor with LED status, timed-override button, and setpoint adjustment, and room sensor with LED status, timed-override button, setpoint adjustment and bi-metal thermostat. MicroTech 2000 Unit Controller LED Indication Status LED State On Continually On 1 2 sec., Off sec. On sec., Off 1 2 sec. Flashing Mode Occupied, Occupied Load Shed Unoccupied Tenant Override, Override Load Shed Alarm Condition Each unit controller orchestrates the following unit operations: Enable heating and cooling to maintain setpoint based on a room sensor. Enable fan and compressor operation. Monitor all safety controls. Monitor discharge air temperature. Monitor leaving water temperature. Relay status of all vital unit functions. Support optional control outputs. An amber, on-board status LED aids in diagnostics by indicating the water source heat pump operating mode and alarm conditions. If there are no current alarm conditions, the LED will indicate the unit operating mode as shown in the table below. If there are one or more alarm conditions present, the LED will flash to indicate an alarm condition. Page 12 of 52 / Catalog 11

13 Applications Systems Cooling and Heating Refrigeration Cycles Cooling Refrigeration Cycle When the wall thermostat is calling for COOLING, the reversing valve directs the flow of the refrigerant, a hot gas, leaving the compressor to the water-to-refrigerant heat exchanger. Here the heat is removed by the water and the hot gas condenses to become a liquid. The liquid then flows through a thermal expansion metering system to the air-to-refrigerant heat exchanger coil. The liquid then evaporates becoming a gas, at the same time absorbing heat and cooling the air passing over the surfaces of the coil. The refrigerant then flows as a low pressure gas through the reversing valve and back to the suction side of the compressor to complete the cycle. Coil - Air to Refrigerant Heat Exchanger Blower Return Air Conditioned Air (Cooling) Thermal Expansion Valve Co-Axial Heat Exchanger Reversing Valve Water In Water Out Sensing Bulb and Capillary Tube Compressor Heating Refrigeration Cycle When the wall thermostat is calling for HEATING, the reversing valve directs the flow of the refrigerant, a hot gas, leaving the compressor to the airto-refrigerant heat exchanger coil. Here the heat is removed by the air passing over the surfaces of the coil and the hot gas condenses to become a liquid. The liquid then flows through a capillary thermal expansion metering system to the water-to-refrigerant heat exchanger. The liquid then evaporates becoming a gas, at the same time absorbing heat and cooling the water. The refrigerant then flows as a low pressure gas through the reversing valve and back to the suction side of the compressor to complete the cycle. Coil - Air to Refrigerant Heat Exchanger Blower Return Air Conditioned Air (Heating) Thermal Expansion Valve Co-Axial Heat Exchanger Reversing Valve Water In Water Out Sensing Bulb and Capillary Tube Compressor Page 13 of 52 / Catalog 11

14 Applications Systems Water source heat pump systems are one of the most efficient, environmentally friendly systems available for heating and cooling buildings. High-efficiency, self contained units (sizes 7,000 btuh to 290,000 btuh) can be placed in virtually any location within a building. Each unit responds only to the heating or cooling load of the individual zone it serves. This results in an excellent comfort level for occupants, better control of energy use for building owners and low seasonal operating costs. The Air-Conditioning Refrigeration Institute (ARI) and the International Standards Organization (ISO) publish standards so that water source heat pumps are rated for specific applications. The ARI/ISO loop options shown in this catalog are typical water source heat pump loop choices available in today s market. These systems offer benefits ranging from low cost installation to the highest energy efficient system available in the market today. Boiler / Tower Applications: ARI 320 / ISO A Boiler/Tower application uses a simple two-pipe water circulating system that adds heat, removes heat or transfers rejected heat to other units throughout the building. The water temperature for heating is generally maintained between 65 F F and is usually provided by a natural gas or electric boiler located in a mechanical room. The condensing water temperature, during cooling months, is maintained between 85 F and 95 F and requires the use of a cooling tower to dissipate waste heat. Cooling towers can be located on the roof, or inside or adjacent to the building. This application can be the lowest cost of the loop options available. Note: ASHRAE 90.1 standards require that circulating pumps over 10 HP will require use of variable frequency drive equipment and pipe insulation to be used whenever water temperatures are below degrees and above 105 degrees. See ASHRAE 90.1 Standards for details. Open Loop Well Water Applications: ARI 325 / ISO Open Loop well water systems use ground water to remove or add heat to the interior water loop. The key benefit of an open loop system is the constant water temperature, usually 50 F to F, which provides efficient operation at a low first cost. Most commercial designers incorporate a heat exchanger to isolate the building loop from the well water. Using heat exchangers reduces maintenance issues while still allowing the transfer of heat from unit to unit as with the Boiler/Tower System. A successful design provides an ample amount of groundwater (approximately 2 GPM per ton) and adequate provisions for discharging water back to the aquifer or surface. Open Loop applications are commonly used in coastal areas where soil characteristics allow reinjection wells to return the water back to the aquifer. Note that some states have requirements on the depths of return water reinjection wells. Also, bad water quality can increase problems with heat exchanger scaling. Suspended solids can erode the heat exchanger. Strainers can be used to contain suspended solids. Open Loop Well Application Boiler/Tower Application Page 14 of 52 / Catalog 11

15 Applications Systems Closed Loop Geothermal Applications ARI 330/ISO Vertical Closed Loop applications are installed by drilling vertical bore holes into the earth and inserting a plastic polyethylene supply / return pipe into the holes. The vertical wells are connected in parallel reverse return fashion to allow the water from the building to circulate evenly throughout the borefield. The circulating fluid dissipates heat to the ground in a similar manner as a tower and adds heat back to the loop like a boiler. If properly designed, the loop field can maintain the loop temperatures necessary to condition the building without the use of a boiler or a tower. Loop temperatures usually range from 37 F to 95 F in Northern climates. Southern applications can see temperatures ranging from 40 F to 100 F. The number of bore holes and their depth should be determined by using commercial software that is specifically designed for vertical geothermal applications. Typical bore depths of a vertical loop range from 150 to 400 feet and generally require about 250 feet of surface area per ton of cooling. Vertical Loop Application Horizontal Loop Application A Surface Water or Lake closed loop system is a geothermal loop that is directly installed in a lake or body of water that is near the building. In many cases, the body of water is constructed on the building site to meet drainage or aesthetic requirements. Surface loops use bundled polyethylene coils that are connected in same manner as a vertical or horizontal loop using a parallel reverse return design. The size and the depth of the lake is critical and commercial design services should be used to certify that a given body of water is sufficient to withstand the building loads. Loop temperatures usually range from 35 F to 90 F and prove to be the best cooling performer and lowest cost loop option of the three geothermal loops. Some applications may not be good candidates due to public access or debris problems from flooding. Surface Water Loop Application A closed loop Horizontal geothermal application is similar to a vertical loop application with the exception that the loops are installed in trenches approximately 5 feet below the ground surface. The piping may be installed using a four-pipe or sixpipe design and could require 1,500 to 2,000 square feet of surface area per ton of cooling. Loop temperatures for a commercial application can range from 35 F to 95 F in Northern climates. Southern climates can see temperatures ranging from 40 F to 100 F. Horizontal loops are generally not applied in urban areas because land use and costs can be prohibitive. New advances in installation procedures have improved the assembly time of horizontal loops while keeping the first cost lower than a vertical loop. Page 15 of 52 / Catalog 11

16 Capacity Data Vertical Unit Size 0 at 2,300 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / CFM = Airflow, cubic feet per minute EWT = Entering water temperature, F GPM = Water flow, gallons per minute WPD = Water pressure drop, feet of water EA = Entering air temperature, F (db/wb) LWT = Leaving water temperature, F SEN = Sensible cooling capacity, Btu/hr. KW = Total unit power input, kilowatts THR = Total heat of rejection, Btu/hr TOT = Total net cooling and heating capacity, Btu/hr. Page 16 of 52 / Catalog 11

17 Capacity Data Vertical Unit Size 0 at 2,300 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 17 of 52 / Catalog 11

18 Capacity Data Vertical Unit Size 108 at 3,0 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 18 of 52 / Catalog 11

19 Capacity Data Vertical Unit Size 108 at 3,0 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 19 of 52 / Catalog 11

20 Capacity Data Vertical Unit Size 121 at 4,000 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 20 of 52 / Catalog 11

21 Capacity Data Vertical Unit Size 121 at 4,000 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 21 of 52 / Catalog 11

22 Capacity Data Vertical Unit Size 1 at 6,000 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 22 of 52 / Catalog 11

23 Capacity Data Vertical Unit Size 1 at 6,000 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 23 of 52 / Catalog 11

24 Capacity Data Vertical Unit Size 215 at 7,200 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 24 of 52 / Catalog 11

25 Capacity Data Vertical Unit Size 215 at 7,200 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 25 of 52 / Catalog 11

26 Capacity Data Vertical Unit Size 290 at 9,6 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 26 of 52 / Catalog 11

27 Capacity Data Vertical Unit Size 290 at 9,6 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 27 of 52 / Catalog 11

28 Capacity Data Horizontal Unit Size 0 at 2,400 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 28 of 52 / Catalog 11

29 Capacity Data Horizontal Unit Size 0 at 2,400 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 29 of 52 / Catalog 11

30 Capacity Data Horizontal Unit Size 090 at 3,000 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 30 of 52 / Catalog 11

31 Capacity Data Horizontal Unit Size 090 at 3,000 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 31 of 52 / Catalog 11

32 Capacity Data Horizontal Unit Size 120 at 4,000 cfm - Cooling EWT GPM WPD System ISO EA LWT Total Sensible KW EER TOT kw EER THR / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 32 of 52 / Catalog 11

33 Capacity Data Horizontal Unit Size 120 at 4,000 cfm - Heating EWT GPM WPD System ISO EA LWT Capacity KW COP TOT kw COP THA Page 33 of 52 / Catalog 11

34 Airflow Correction Factors Percent of Nominal Airflow Total Cooling Capacity Sensible Cooling Capacity kw - Cooling Total Heat of Rejection Total Heating Capacity kw - Heating Total Heat of Absorbtion Operating Limits Air Limits - F (English units) Standard Extended Range Units Units Cooling Heating Cooling Heating Min Ambient Air 50 F 50 F 40 F 40 F Normal Ambient Air F F F F Max Ambient Air 100 F 85 F 100 F 85 F Min Ent Air ➀, ➁ 50 F 50 F 50 F 40 F Normal Ent Air db/wb /67 F F /67 F F Max Ent Air db/wb ➀, ➁ 100/83 F F 100/83 F F Air Limits - C (SI units) Standard Extended Range Units Units Cooling Heating Cooling Heating Min Ambient Air 10 C 10 C 5 C 5 C Normal Ambient Air 27 C 21 C 27 C 21 C Max Ambient Air 38 C 29 C 38 C 29 C Min Ent Air ➀, ➁ 10 C 10 C 10 C 5 C Normal Ent Air db/wb 27/19 C 21 C 27/19 C 21 C Max Ent Air db/wb ➀, ➁ 38/28 C 27 C 38/28 C 27 C Water - F (English units) Standard Extended Range Units Units Cooling Heating Cooling Heating Min Ent Water ➀, ➁ 55 F 55 F 30 F 20 F Normal Ent Water 85 F F 77 F 40 F Max Ent Water 110 F 90 F 110 F 90 F Water - C (SI units) Standard Extended Range Units Units Cooling Heating Cooling Heating Min Ent Water ➀, ➁ 13 C 13 C -1 C -6 C Normal Ent Water 29 C 21 C 25 C 4 C Max Ent Water 43 C 21 C 43 C 32 C ➀ At ARI flow rate ➁ Maximum and minimum values may not be combined. If one value is at maximum or minimum, the other two conditions may not exceed the normal condition for standard units. Extended range units may combine any two maximum conditions, but not more than two, with all other conditions being normal conditions. Environment This equipment is designed for indoor installation only. Sheltered locations such as attics, garages, etc., generally will not provide sufficient protection against extremes in temperature and/ or humidity, and equipment performance, reliability, and service life may be adversely affected. Power supply A voltage variation of +10% of nameplate utilization voltage is acceptable. Three-phase system imbalance shall not exceed 2%. Additional information for initial start-up only Standard units: Units are designed to start in an ambient of 50 F (10 C), with entering air at 50 F (10 C), with entering water at F (21 C), with both air and water at the flow rates used in the ARI Standard rating test, for initial start-up in winter. Note: This is not a normal or continuous operating condition. It is assumed that such a start-up is for the purpose of bringing the building space up to occupancy temperature. Extended range units: Extended range heat pump conditioners are designed to start in an ambient of 40 F (5 C), with entering air at 40 F (5 C), with entering water at 40 F (5 C), with both air and water at the flow rates used in the ARI Standard rating test, for initial startup in winter. Note: This is not a normal or continuous operating condition. It is assumed that such a start-up is for the purpose of bringing the building space up to occupancy temperature. Page 34 of 52 / Catalog 11

35 Fan Performance Data (Includes allowance for dry coil and filter) Vertical unit sizes 0 and 108 EXTERNAL STATIC PRESSURE (INCHES OF WATER) RPM 1000 RPM 1200 RPM HP 1400 RPM 0 RPM 0 0 1,000 2,000 3,000 4,000 5,000 6,000 CFM 2 HP For wet coil, calculate face velocity (cfm coil face area, sq. ft). Add the following static to the external static pressure for the corresponding face velocity: 300 fpm =.20 ; 400 fpm =.31 ; 500 fpm =.44. Re-enter table at the increased external static pressure to determine final cfm. Motor and Drive Selections: Unit Size 0 Unit Size hp RPM hp RPM 2 hp RPM 2 hp RPM Do not select Vertical unit size 121 EXTERNAL STATIC PRESSURE (INCHES OF WATER) ,000 0 RPM 1400 RPM 1200 RPM 1000 RPM 2 HP 3 HP 2,000 3,000 4,000 CFM 5,000 6,000 For wet coil, calculate face velocity (cfm coil face area, sq. ft). Add the following static to the external static pressure for the corresponding face velocity: 300 fpm =.27 ; 400 fpm =.41 ; 500 fpm =.58. Re-enter table at the increased external static pressure to determine final cfm. Motor and Drive Selections: Unit Size hp RPM 3 hp RPM Do not select Page 35 of 52 / Catalog 11

36 Vertical unit sizes 1, 215 EXTERNAL STATIC PRESSURE (INCHES OF WATER) For wet coil, calculate face velocity (cfm coil face area, sq. ft). Add the following static to the external static pressure for the corresponding face velocity: 300 fpm =.20 ; 400 fpm =.31 ; 500 fpm =.44. Re-enter table at the increased external static pressure to determine final cfm. Motor and Drive Selections: Unit Size 1 Unit Size hp RPM 3 hp RPM Do not select 5 hp RPM 5 hp RPM Vertical unit size 290 EXTERNAL STATIC PRESSURE (INCHES OF WATER) ,000 0 RPM 4,000 0 RPM 0 RPM 1000 RPM 1000 RPM 0 0 2,000 4,000 6,000 8,000 10,000 12,000 CFM For wet coil, calculate face velocity (cfm coil face area, sq. ft). Add the following static to the external static pressure for the corresponding face velocity: 300 fpm =.27 ; 400 fpm =.41 ; 500 fpm =.58. Re-enter table at the increased external static pressure to determine final cfm. 10,000 12,000 Motor and Drive Selections: Unit Size hp RPM 10 hp RPM Do not select 6,000 CFM 1200 RPM 3 HP 1200 RPM 5 HP 8, RPM HP 1400 RPM 10 HP 50 Cycle Applications: To obtain fan performance at 50 cycle operation: 1. Multiply RPM by 0.83 and re-enter at the revised lower RPM to obtain CFM and brake horsepower at a given static pressure. Check the brake horsepower against the actual motor size. Page 36 of 52 / Catalog 11

37 Horizontal unit size 0 Horizontal unit size Size 0 00 Size 090 Ext. Static Pressure (inches of water) RPM 1000 RPM 900 RPM 0 RPM 1 1/2 HP Ext. Static Pressure (inches of water) RPM 900 RPM 0 RPM 1 1/2 HP ,500 2,000 3,500 cfm (cubic feet per minute) ,500 1,000 2,000 3,000 4,000 5,000 cfm (cubic feet per minute) Horizontal unit size 120 Do Not Select 50 Size 120 cfm x = l/s hp x = kw inches x 249 Pa = mm 00 Hz Ext. Static Pressure (inches of water) RPM 0 RPM 1000 RPM 3 HP UNIT MOTOR RPM FACTORY MOTOR SHEAVE SIZE HP RANGE SETTING (RPM) POSITION Turns Open Turns Open Turns Open 50 Hz UNIT MOTOR RPM FACTORY MOTOR SHEAVE SIZE HP RANGE SETTING (RPM) POSITION Turns Open Turns Open Turns Open 0.50 Note: For wet coil, calculate face velocity (cfm coil face area). Add the following external static pressure for the corresponding face velocity ,000 3,000 4,000 5,000 6,000 cfm (cubic feet per minute) English Units SI Units 300 fpm =.20" 1.52 m/sec = 48 Pa 400 fpm =.31" 03 m/sec = 77.2 Pa 500 fpm =.44" 54 m/sec = 106 Pa Re-enter curve at the increased static pressure to determine final cfm. Page 37 of 52 / Catalog 11

38 Electrical Data Unit Size Compressor Power Fan Fan Total Max. Min. Min. Ckt. Motor RLA LRA Motor Unit Fuse Voltage Hz Phase COMP 1 COMP 2 COMP 1 COMP 2 FLA FLA Volts Ampacity Size HP Horizontal HP HP HP HP Horizontal HP HP HP HP Horizontal HP HP HP HP HP HP Vertical HP HP HP HP HP HP HP HP Vertical HP HP HP HP HP HP HP HP Vertical HP HP HP HP HP HP HP HP Vertical HP HP HP HP HP HP HP HP Vertical HP HP HP HP HP HP HP HP Vertical HP HP HP HP HP Page 38 of 52 / Catalog 11

39 Physical Data Vertical Units Unit Size Fan Wheel Quantity D x W (Inches) (2) 13 3/16" x 12 5/8" (3) 13 3/16" x 12 5/8" Coil Face Area (Square Feet) 0 0 Coil Rows Refrigerant Charge (R-22, LB.) /0 0 each 10 each Filters Quantity Size (Inches) (4) 16" x 25" (6) 20" x 25" Compressor Quantity Weight Operating Weight Shipping Horizontal Units Unit Size Fan Wheel - D x W (In.) 13 x x x 15 Fan Motor Horsepower 1 1 /2 1 1 /2 3 Coil Face Area (Sq. Ft.) Coil Rows Refrigerant Charge (Oz.) Filter, (Qty.) Size (In.) (2) 28 x 23 1 /2 x 2 (3) 28 x 19 Water Connections, Female NPT (In.) 1 1 /4 1 1 /4 1 1 /4 Condensate Connections, O.D. (In.) 7 /8 7 /8 7 /8 Weight, Operate (Lbs.) Weight, Shipping (Lbs.) Optional 3 horsepower motor available. Refrigerant charge shown is total. Charge per circuit is 1 /2 of total shown. Size 0 is split 43/41 Page 39 of 52 / Catalog 11

40 Dimensional Data Large Vertical All dimensions are approximate. Certified drawings available upon request. Unit sizes 0, 108 and 121 Left Hand Front Right Hand Unit sizes 1, 215, and 290 Left Hand Front Right Hand 2" Filter Rack Return Air Duct Collar 2 1 /8 6 A B Unit Size Duct Conn. (IN.) A B / / / /16 Page 40 of 52 / Catalog 11

41 Dimensional Data Large Horizontal Unit sizes 0 thru 120 Straight discharge shown. Rearrange panels and blower for end discharge. A B D C E F 2" (51 mm) UNIT DIMENSIONS (INCHES) SIZE A B C D E F Hanger Brackets 2" (51 mm) 42" (1067 mm) Fan Assembly Comp. 44" (1118 mm) Comp. Control Box By Others By McQuay International By Others Airflow Coil " (2032 mm) 82" (2082 mm) 2" (51 mm) C D B Filter Rack/Return Air Duct Collar A UNIT DIMENSIONS (INCHES) SIZE A B C D E E Page 41 of 52 / Catalog 11

42 Typical Wiring Diagrams Mark IV/AC Wiring Diagram Vertical Unit Page 42 of 52 / Catalog 11

43 Mark IV/AC Wiring Diagram Vertical Unit / Horizontal Unit ( //3) Page 43 of 52 / Catalog 11

44 Mark IV/AC Wiring Diagram Vertical Unit / Horizontal Unit (4//3) Page 44 of 52 / Catalog 11

45 MicroTech 2000 Wiring Diagram Vertical Unit Page 45 of 52 / Catalog 11

46 MicroTech 2000 Wiring Diagram Vertical Unit / Horizontal Unit Page 46 of 52 / Catalog 11

47 Engineering Guide Specifications Large Vertical General Contractor shall furnish and install Water Source Heat Pumps as indicated on plans. Each unit shall be CETL or CE Listed. Units less than 135,000 Btu/hr. total cooling capacity shall be ISO rated per Standard Each unit shall be fully run tested at the factory. Each unit shall be shipped on a wooden skid and covered with plastic. Casing and Cabinet The casing shall be G galvanized steel corner posts and steel panel construction with heavy gauge steel base pan. The base pan shall have holes to accept field installation of rubber or spring isolators. The interior shall be lined with 1/2" thick, 1 1 / 2 lb. density glass fiber. Multiple panels on front, back and sides shall provide access to compressor, control box, fan motor and fan assembly. Insulated drain pan shall act a divider panel between the compressor and fan sections. Units shall have factory installed 1" thick filter brackets for side filter removal. Unit shall have multiple 1" thick throwaway filters. Cabinets shall have knockouts for entrance of line voltage and low voltage control wiring. Supply return water and condensate connections shall be copper FPT fittings and protrude through the casing. Refrigerant Circuit Each refrigerant circuit shall have a hermetic compressor, electronic expansion valve, water-to-refrigerant coaxial heat exchanger, reversing valve, finned tube heat exchanger, and safety controls. Units 10 tons and smaller shall have a single refrigerant circuit and units 15 tons and larger shall have dual independent refrigerant circuits. Compressor(s) shall be hermetic type with thermal overload protection and external rubber mounts. Finned tube coil shall be aluminum fins bonded to copper tubes. The coaxial heat exchanger shall be copper inner tube and steel outer tube with a U.L. Listing and a 300 psig water side rating and a 450 psig refrigerant side rating. High and low side service valves shall be provided on each refrigerant circuit for measuring and charging of the refrigerant circuit. Safety controls shall include a low suction temperature (freezestat), high refrigerant pressure and low refrigerant pressure switches. Units shall be capable of being reset only by interrupting the power supply to the unit and not from the wall thermostat. Unit shall be capable of starting in an ambient of 40 F with entering water at 55 F standard range, 25 F extended range, with both air and water flow rates at the ISO rating conditions. Electrical A control box shall be located within the unit and shall contain controls for compressor(s), reversing valves(s) and fan motor operation. A terminal block shall facilitate main power wiring connection. A large capacity transformer shall supply the low voltage control circuit. Unit shall be nameplated to accept time delay fuses for branch overcurrent protection of the power conductors. Unit control system shall provide one or two stage cooling and heating as required by the setpoints of the wall thermostat. The unit shall be capable of providing an output signal to a LED on the thermostat to indicate a fault condition. The control system shall be microprocessor based and provide the following: Fan and Motor Assembly Units shall have a belt driven centrifugal fan. The fan housing shall have a removable orifice ring to facilitate fan motor and fan wheel removal. The fan housing shall protrude through the cabinet to facilitate field duct connection. Mark IV/AC Control System Unit shall have a microprocessor based control system. The unit control logic shall provide heating and cooling operation as required by the setpoints on the wall thermostat. The control system shall provide the following: 1. The use of standard mercury bulb wall thermostats. Fan operation simultaneous with the compressor (fan interlock) regardless of thermostat logic. Time delay compressor operation. Delayed de-energization of the reversing valve for quiet reversing valve operation. Compressor short cycle protection or a minimum three minutes before restart is possible. 6. Random unit start-up after coming off an unoccupied mode. 7. Single grounded wire connection for activation of the unoccupied, load shed or emergency shutdown modes. Night setback temperature setpoint input signal from the wall thermostat. Override signal from wall thermostat to override unoccupied mode for two hours. Brown-out protection to suspend unit operation if the supply voltage drops below % of normal. Condensate overflow protection to suspend cooling operation in an event of a full drain pan. 1 Suspended compressor operation upon activation of the refrigerant pressure switch. 1 Cooling operation for seconds upon activation of the low suction temperature (freezestat) switch - defrost cycle. 1 Method of defeating compressor time delay for fast service diagnostics. Page 47 of 52 / Catalog 11

48 Field Installed Accessories Thermostats (Choose one of the following wall thermostats) Manual changeover wall thermostat for one stage heating and cooling operation. Subbase shall have system heat-off cool and fan on-auto switches. Automatic changeover wall thermostat for one or two stage heating and one or two stage cooling operation. Subbase shall have system off-auto and fan on-auto switches with LED for fault. Automatic and manual changeover wall thermostat for one or two stage heating and one or two stage cooling operation. Subbase shall have system off-auto and fan on-auto switches with LED for fault. Deluxe automatic changeover wall thermostat for one or two stage heating, one or two stage cooling and one stage night setback heating operation. Subbase shall have system off-auto and fan on-auto-override switches with LED for fault. Programmable micro-electronic wall thermostat for one or two stage heating, one or two stage cooling, night set-up, night set-back and day/night time clock operation. The thermostat shall have system heat-auto-cool-off and fan on-auto switches. Non Programmable Electronic Premier white, mounts horizontal, system switch; Off-Heat-Auto-Cool and fan switch; On-Auto. Flexible Hoses (Choose one of the following flexible hoses) Fire Rated Hoses two fire rated flexible hoses with ASTM ratings of Flame Spread 25, Fuel Contribution 25 and Smoke Density 50 for connection to unit and field piping. Hose shall be covered with galvanized steel. Valves Two combination balancing and shutoff ball valves with adjustable memory stop. Two Inch Filter Rack A 2" filter rack to accept 2" throwaway or cleanable filters. The bracket shall allow for side filter removal in either direction. Return Air Duct Collar Return air duct collar to, accept air ductwork connection. Field Installed Controls for Mark IV/AC Control Units Boilerless system kit to lock out compressor heating operation if the entering water falls below the adjustable setpoint. In addition, the control shall provide a contact signal to control a field installed electric heater downstream of the unit. An emergency heat switch shall be provided. Motorized valve and control relay. The assembly shall include a relay, motorized ball valve and wire harness. The valve shall open when the compressor is on and close when the compressor is off. Auxiliary relay controls auxiliary devices when the fan or compressor are operating. The relay shall have SPDT, three amp rated contacts. Page 48 of 52 / Catalog 11

49 Engineering Guide Specifications Large Horizontal General Contractor shall furnish and install water source heat pumps as indicated on plans. Each hz unit shall be ISO certified and CETL listed. Each unit shall be fully run tested at the factory. Each unit shall be shipped on a wooden skid and covered with corrugated material. All 50 hz units shall be CE certified. Casing and cabinet The cabinet shall be fabricated from heavy-gauge G- galvanized steel. The interior shall be insulated with 1 /2" (17 mm) thick, 1 1 /2 lb. (681g) coated glass fiber. Panels shall provide access to the fan compartment and the compressor/ control box compartment. Unit shall have an insulated panel separating the fan compartment from the compressor compartment. Unit shall have a 1" (24 mm) thick throwaway filter and a factory installed combination filter rack/return air duct collar. The filters shall be removable from the side or from the bottom. Unit shall have a galvanized steel painted drain pan with a drain connection extending through the unit casing. Cabinet shall have separate holes and knockouts for entrance of line voltage and low voltage control wiring. Supply and return water connections shall be copper FPT fittings and shall protrude through the cabinet for connection to a flexible hose. Unit shall be supplied with heavy metal brackets, rubber isolators, fasteners and washers to suspend and isolate the unit from the building structure. Refrigerant Circuit Units shall be dual circuit design containing two hermetic compressors, two reversing valves, two water-torefrigerant heat exchangers, two expansion valves, and two sets of safety and access valves. Compressor shall be hermetic type with external vibration or rubber mounts and thermal overload protection. The finned tube coil shall be constructed of aluminum fins bonded to copper tubes. The heat exchanger shall be rated for 400 psig (27 kpa) on the water side and 450 psig (3103 kpa) on the refrigerant side. Safety controls shall include a low suction temperature (freezestat) switch and a high refrigerant pressure switch to lock out compressor operation. Units shall have a low refrigerant pressure switch for loss of charge protection. A low pressure switch shall not be permitted to replace a low suction temperature switch for freeze protection. Units shall be capable of being reset only by interrupting the power supply to the unit. Unit shall not be able to be reset from the wall thermostat. Unit shall be capable of starting in an ambient of 40 F (5 C) with entering water at F standard range, 25 F extended range, with both air and water flow rates at the ARI rating conditions. Electrical A control box shall be located within the unit and shall contain controls for compressor, reversing valve and fan motor operation and shall have a 50 or 75 VA transformer, and a terminal block for low voltage field wiring connections. Unit shall be nameplated to accept time delay fuses or HACR circuit breaker for branch overcurrent protection of the power source. Unit control system shall provide heating or cooling as required by the setpoints of the wall thermostat. The unit control scheme shall provide for fan operation simultaneous with compressor operation (fan interlock) regardless of the thermostat type. The unit shall be capable of providing an output signal to an LED on the thermostat or to a central monitoring panel to indicate a fault condition from the activation of any one of the safety switches. Fan and Motor Assembly Units shall have a belt driven centrifugal fan. The fan housing shall have a removable orifice ring to facilitate fan motor and fan wheel removal. The fan housing shall protrude through the cabinet to facilitate field duct connection. Units shall have a straight-through or right-angle discharge air arrangement. Mark IV/AC Control System Unit shall have a microprocessor based control system. The unit control logic shall provide heating and cooling operation as required by the setpoints on the wall thermostat. The control system shall provide the following: 1. The use of standard mercury bulb type or programmable wall thermostats. Fan operation simultaneous with the compressor (fan interlock) regardless of thermostat logic. Time delay compressor operation. Delayed de-energization of the reversing valve for quiet reversing valve operation. Compressor short cycle protection of a minimum of three minutes before restart is possible. 6. Random unit start-up after coming off in unoccupied mode. 7. Single grounded wire connection for activation of the unoccupied, load shed or emergency shutdown modes. Night setback temperature setpoint input signal from the wall thermostat. Override signal from wall thermostat to override unoccupied mode for 2 hours. Brownout protection to suspend unit operation if the supply voltage drops below % of normal. Condensate overflow protection to suspend cooling operation in an event of a full drain pan. 1 Suspended compressor operation upon activation of the refrigerant pressure switch(es). 1 Cooling operation activated for seconds upon activation of the low suction temperature (freezestat) switch - defrost cycle. 1 Method of defeating compressor, reversing valve and fan time delays for fast service diagnostics. Page 49 of 52 / Catalog 11

50 Optional MicroTech 2000 Control System Unit shall have a preprogrammed, pre-tested microprocessor based control system. The unit control logic shall provide control of unit heating and cooling functions in response to a wall mounted comfort sensor. The control system shall provide the following: 1. Monitoring of safety controls in each heat pump and appropriate responses. Monitoring of discharge air temperature and leaving water temperature at each heat pump. Fan compressor and reversing valve operation. Control outputs for boilerless system electric heat, motorized valves, fresh air damper and other auxiliary equipment. Operation status of all vital unit functions. 6. Optional night setback override for tenant comfort. Field Installed Accessories Thermostats (Choose one of the following wall thermostats) Manual changeover wall thermostat for one-stage or two-stage heating and cooling operation. Subbase shall have system off-auto and fan on-auto switches. Deluxe automatic changeover wall thermostat for one stage heating, one stage cooling, one stage night setback heating operation 12 F (-6.6 C) below daytime heat setpoint and built-in override switch to activate the two-hour override function of the Mark IV board. Subbase shall have system off-auto and fan on-auto-(override) switches with LED for fault. Automatic and manual changeover wall thermostat for one stage heating and one stage cooling operation. Subbase shall have system off-auto and fan on-auto-(override) switches with LED for fault. Programmable wall thermostat for one stage heating, one stage cooling, night setup, night setback and day/night time clock operation. The thermostat shall have system on-off, temperature heat-auto-cool and fan on-auto switches. Non-programmable electronic premier white, mounts horizontal, system switch; Off-Heat-Cool and fan switch; On-Auto. Flexible Hoses Fire Rated Hoses two fire rated flexible hoses with ASTM ratings of Flame Spread 25, Fuel Contribution 25 and Smoke Density 50 for connection to unit and field piping. Hose shall be covered with galvanized steel. Valves Two combination balancing and shutoff valves with adjustable memory stop. Two-Inch Filter Rack Return air duct collar and 2" (51 mm) filter rack to accept a return air duct connection and a 2" (51 mm) thick filter. The bottom bracket shall be capable of being relocated for bottom filter removal. Pleated Filter Pleated filter(s) for 30% efficiency. Boilerless System Kit Boilerless system kit locks out compressor heating operation if the entering water falls below the adjustable setpoint. In addition, the control shall provide a contact signal to control a field installed electric heater downstream of the heat pump unit. An emergency heat switch shall be provided. Field Installed Controls Motorized Valve Relay and Control Valve The assembly shall include a relay, valve and wire harness. The valve shall open when the compressor is on and close when the compressor is off. Multiple unit control panel allows a single thermostat to control up to three units in parallel. Auxiliary relay controls optional devices when the fan is operating. The relay shall have SPDT contacts. Page 50 of 52 / Catalog 11

51 Notes Page 51 of 52 / Catalog 11

52 Total Heat Pump Capability Horizontal Units 1 2 to 5 Tons Vertical Units 1 2 to 5 Tons Console Units 1 2 to Tons Rooftop Units This document contains the most current product information as of this printing. For the most up-to-date product information, please go to McQuay International (0) Catalog (Rev. 4/04)