R-134a. ACUV-D Series Air Cooled Condesing Units. SKM Air Cooled Condensing Units ACUV-D Series - R-134a.

Transcription

1 SKM Air Cooled Condensing Units R134a D Series Air Cooled Condesing Units Range 8 TR to 142 TR (27 kw to 501 kw) facebook.com/skmaircon Sharjah Economic Excellence Award winner 1

2 Contents Legend... 2 Nomenclature... 2 Introduction... 2 General Features... 3 Component Features... 3 Control Panel... 4 Unit Controller... 4 Optional Features... 5 Engineering Specifications... 7 Capacity Ratings Compressor Starting Capacity Control Steps Selection Procedure Field Connections Typical Wiring Diagram Electrical Data Dimensional Data Loading Points Location & Space Requirements Unit Installation Typical Refrigerant Piping Recommended Line Sizes Guide Specification Introduction SKM D series Air cooled condensing unit are designed for the use on systems with indoor units connected to remote condensing units located outside either on ground or on roof level. SKM D units are manufactured to meet the requirements of the gulf severe climatic conditions. Legend The following abbreviations are used throughout this manual: BPF... Bypass Factor cfm... cubic feet per minute EER... Energy Efficiency Ratio Hz... Hertz inwg... inches of water gauge kw... kilowatts kg... kilogram lbs... pounds weight (British units) L/S... liters per second Nomenclature Air cooled Condensing Unit VShape Condenser Construction Power Supply 5 : 50Hz Frequency 6 : 60Hz No. of Refrigerant Circuits ACU V D Y MBh...BTUH x 00 Ph... Phase Pa...Pascals PD....Pressure Drop PI... Power Input RPM...Revolutions per Minute TR... Tons of Refrigeration = 12 MBh V... Volt Power Supply Code Y: 380V415V/3Ph/50Hz P: 440V/3Ph/50Hz R: 380V/3Ph/60Hz E: 460V/3Ph/60Hz T: 220V/3Ph/60Hz Semi hermetic Reciprocating Compressor (R134a) The D Air Cooled Condensing unit are ideal for warehouses, large halls, schools, mosques, or wherever the requirement calls for a heavy duty unit with a semihermetic compressor. D series Air cooled condensing unit ( semihermetic reciprocating ) are available in 50 models covering nominal capacity ranges from 8 TR 142 TR (27 kw to 501 kw) in 50Hz and 60Hz. D Air Cooled Condensing unit are rated in accordance with AHRI365. D series provide efficient operation, wide range of design flexibility coupled with packaged concept requiring least onsite work. D series Air Cooled Condensing units are used for commercial and industrial applications where high efficient condensing units are needed to match an indoor central station AHUs or coils to get maximum performance advantages of split sytem with reasonable initial cost. SKM provides qualified service and stock of replacement parts in all major cities of the G.C.C. countries, Egypt, Jordan, and Pakistan. See back cover for details or call SKM. Nominal Capacity (TR) SKM Air Conditioning LLC SKM reserves the right to change, in part or in whole the specifications of its Air Conditioning Equipment at any time in order to add the latest technology. Therefore, the enclosed information may change without any prior notice. You name it...we cool it 2

3 General Features Condensers The D series is a modern, diversified and environment friendly series of air cooled condensing unit which uses R134a as a refrigerant. Condenser coils are manufactured of seamless copper tubes mechanically bonded to aluminum fins to ensure optimum heat transfer. The complete D condensing unit provides an extremely rugged, heavy duty, longlife and energy efficient that will provide higher efficiency over a long and extended life. What makes D series the pride of SKM products is the use of: Semi Hermetic Reciprocating, heavy duty, energy efficient compressors. Totally enclosed, Class F insulated, IP55 protected condenser fan motor. Heavy duty condenser optimised in design for longlife maintenance free operation. Cabinet construction specifically designed for Gulf climates. IP 54 Electrical panel. Factory installed, advanced and user friendly microprocessor based control system. Interface capability with major BMS protocols (option). The SKM D series air cooled condensing units are durable, dependable, strong, reliable, versatile, quiet and energy efficient. Wherever a heavy duty condensing unit is required, the D series should be an automatic choice. Component Features Compressor Compressors used in D series are fully accessible, semihermetic, reciprocating type. They are equipped with an oil sight glass, suction and discharge service valves and crankcase heater. All compressors are refrigerant gas cooled and equipped with an oil pressure lubrication system. The oil pump working in either direction is protected by an oil screen and a valve provided for the fitting of an oil pressure gauge. For protection, all compressors are equipped with preset internal relief valve between suction and discharge sides. The compressors are provided with vibration isolator springs underneath and therefore, external to D series, AVM s may be necessary only for critical applications. The compressor motors have inherent thermal protection. This is in addition to other standard safety and protection controls. Compressors conform to EN standards. All coils are tested against leakage by air pressure of 450 psig (30 kpa) under water. All standard coils are 2,3 or 4 rows/ 14 FPI, 3/8 (9.5 mm) O.D. tubes. An integral subcooling circuit is provided to increase the cooling capacity, without additional operating cost. For different application requirements, other optional condenser fin materials are available: Copper fins. Condenser Coil Electrotinned Copper fins. Copper finned coils with electrotinned after manufacturing. Precoated Aluminum fins. The precoated is hydrophobic polyurethane resin. This option provides substantial corrosion protection beyond standard coil construction. Aeris Guard Coil coating. The Aeris Guard Coil is a self etching high performance modified epoxy finish that is specifically designed to coat and protect Aluminum and Copper surfaces. In addition, the coating is ideal for the protection of ferrous and non ferrous materials. SKM D series, all models, are restricted to a 14 FPI (1.8 mm) fin spacing condenser coil. Gulf dust storms and the general level of available maintenance in Gulf countries ensures this condenser coil design shall provide long life and maintenancefree operation with the least possibility of operational blockage on the condenser. Ample condenser surface and sensible air flow across the condenser ensures a low temperature differential between condensing temperature and the high Gulf ambients making the D condensing unit perform efficiently and durably. 3

4 Condenser Fans Refrigerant Pipe work Condenser fans are propeller type, aluminium alloy blades, directly driven by electric motors. Motors are Totally Enclosed Air Over (TEAO) six pole with class F insulation and minimum IP55 protection.the TEAO and class F insulation features ensure long life and are unique for SKM. The motors are factory wired, using wires specially selected for high ambients operation, to unit control panel where the motor contactors are located to control the operation of these motors. The condenser fans are individually statically and dynamically balanced at the factory. Complete fan assembly is provided with suitable acrylic coated fan guard. Casing/Structure Condenser Fan Motor Designed for ease of handling and low cost to install. The D Air cooled condensing Units are factory assembled and mounted on a rigid base. The casing used in D condensing units is made of zinc coated galvanized steel sheets conforming to JISG3302 and ASTM A653 which is phosphatized then baked after an electrostatic powder coat of approximately 60 microns. This finish and coating passed a 00 hours in 5 % salt spray testing at 95 F (35 C) and 95% relative humidity as per ASTM B117. The entire assembly comes complete with lifting holes on the base frame for rigging and installation. Access panels are provided for easy service and maintainance Options available include hot dipped galvanized base frame and structural members aluminium/stainless steel panels on request, as an option. SKM D series Condensing units are provided with all internal piping, using ACR grade copper tubing, between compressor and condenser. Loose supplied liquid line refrigerant controls are available as an option for field installation (Please specify CRSP). When this option is ordered, the unit will be supplied with a correctly sized thermostatic expansion valve, liquid line solenoid valve, liquid line sight glass/moisture indicator and filter drier having flared or soldered ends isolatable with one shutoff valve. Shutoff valve for the other side of the filter drier can be supplied, if option CXFV is specified. Whether or not, these options are include, installation of solenoid valve in the liquid line near the evaporator is mandatory for proper operation of the unit since the unit will switch off only after a pump down cycle. Solenoid valve is to interlocked with controller as per terminals in the wiring diagram. Control Panel The unit mounted control panel enclosure is fabricated out of heavy gauge sheet steel in phosphatized powder coated baked finish. The enclosure conforms to IP54 as per guidelines in IEC 529. A hinged access door and keyfastener is provided for easy access and security. The panel is factory wired in accordance with NEC 430 & 440, labelled, tagged and features 220V / 240V controls. Compressors are with DOL or part winding starting, depending on model. Individual compressor & condenser fan motor contactors. Motor protector circuit breaker for condenser fan motors. Control circuit breaker. Unit on/off Switch. Microprocessor control boards. Control Relays. Power and control terminal blocks. Microprocessor Controller Refrigerant Charge Condensing units are shipped with nitrogen holding charge only. Piping connections D Air Cooled Condensing units piping connections come, as standard, terminated with sealed and soldered copper pipe ends. Normal installation would require the cutting off (using rollertype tube cutters) of the ends prior to connections being resoldered and connected to the field supplied refrigerant pipework. Microprocessor Controller All D series condensing units are equipped with a full function microprocessor based controller as a standard feature. The controller is factory programmed for the control of AHU fan motor, compressors and condenser fans. The controller comes with a built in keypad and display for simple but meaningful man machine interface. This controller provides complete operational control for the unit and has builtin auto diagnostic capability that can signal normal operation or alarm conditions as well as shutting down the unit or system if necessary. 4

5 Low suction pressure. High discharge pressure. High compressor motor temperature. (For compressors with electronic module). Compressor short cycling. The controller comes with a loose supplied sleek and elegant design room unit for installing in the conditioned space. Communication between unit controller and room unit is through two wire interface. The communication cable should be 2 core, twisted pair, unscreened with stranded conductors (as per KNX specification). Maximum distance between room unit and controller can be 700 meters. The room unit has a built in sensor for measuring the room temperature. It transmits room temperature, set point, unit operating mode, operating schedule etc. to the unit controller. Control of the compressors is based on room temperature and the set point, as standard. If unit control needs to be based on duct temperature, please specify during time of order. The Main Features of the controller are as follows: Built in LCD display with back light. Roll & push knob and 3 function buttons. Battery backed up built in real time clock. Multiple authorization level to provide tight security for the control system. Capacity control based on room temperature or return air temperature. Alarm history. A sleek & elegant design room unit. Display Information SKM D series condensing units offer LCD display which allows the operator to access different parameters of the unit. Operator can view and change the unit parameters. The display information includes: Status. Outputs. Inputs. Alarms. Set points. Password. System Control Philosophy Unit maybe enabled or disabled through the on/off switch in the unit control panel. Control is based on room temperature sensed by room unit. Compressors will be staged based on the set point and actual. room temperature. On an increase in room temperature, cooling stages will be added and on a decrease in room temperature, cooling stages will be removed from the system. System Protection Room Unit The intelligent microprocessor based controller monitors all the safeties related to the unit and makes the necessary protections, by shutting down the entire unit or the effected circuit. The protection includes: BMS Connectivity (Optional) Volt free contacts for run status, common fault status, auto mode status and provision for remote on/off shall be provided as option if required. In addition, the D microprocessor can support the major BMS protocols such as BACnet, Modbus & LON. Extra hardware may be required depending on the protocol. Optional Features Alternative Condenser Material Made of copper tubes and alternative fin material and/or protective coating. For Pre Coated aluminum fins, specify (FAP). For Aluminum Fins with Aeris Post Coat Protection, specify (FAA). For Copper Fins, specify (FC). For Copper Fins with Aeris Post Coat Protection,specify (FCA). For electrotinned Copper Fins only, specify (CFT). For Copper Finned Coils electrotinned post manufacturing, specify (FCT). Condenser Coil Guard (CGP) Galvanized wire mesh guaid with painted finish for condenser Coil.Recommended on ground level installations where coil needs to be protected against vandalism. Galvanized Frame And Base (GFB) Steel frame and base which are hot dip galvanized after manufacturing process. This is recommended for highly corrosive environments. Pressure Gauges (SDG) Suction and discharge and oil pressure indication of each refrigerant circuit. Gauges are mounted outside the Control Panel Low noise Fan and motor assembly (LNF) Can be provided for applications where minimal unit sound is required. Pressure Relief Valve To protect the unit from being overpressurized. (PRV) Marine Paint (MP) To provide increased corrosion resistance coastal environments and offshore locations. C o n d e n s e r F a n s w i t h p o l y g l y c o a t c o a t i n g ( P G F ) To provide protection against corrosion for condenser fans. Capacity Control Steps (CRS1) To provide additional capacity steps on the units. See Table 6 (Page 16) for optional steps available. 5

6 Isolated Condenser Fan Motors (CMS) For elimination of extraneous noise and vibration from condenser fan motor, the motors are individually isolated from the frame. Hot Gas Bypass System (GBP) With solenoid valve to enable operation of a large sized unit at low loads, like during low ambients due to application requirements. (Highly recommended for 0% fresh air application). IP55 Control Panel (ICP) Control Panel for special applications to meet IP 55 requirements. Manual Reset Type High Pressure Switch (MHP) To replace standard auto reset, capsule type pressure switch. Low Ambient Operation Kit (LAO) For unit operation down to lower than normal gulf ambient. Please specify during the time of order. High Ambient Operation kit (HAO) For operation at ambient temperature between 125ºF (52ºC) and 131ºF (55ºC) maximum. Main Isolator (Without door interlock) For main power isolation. (consult SKM) (ISO) Control Transformer (CXT) This option is necessary and available for D models rated for 440V/3PH/50Hz or 460V/3PH/60Hz or power supplies without neutral. (When ordering for these voltages, this option must be ordered). Voltage Monitoring Module (VMM) To prevent D unit operation in the event of Phase loss, Phase reversal, and Under / Over voltage on the incoming line voltage. Soft Starter (SFS) To reduce the starting current of compressors using reduced voltage starting method. Compressors will be started using electronic solid state soft starters that will ramp up the speed of the compressors to rated speed within few seconds thus reducing the mechanical & electrical stresses. Suction Pressure read out Capability (SPC) Additional transducer in suction line to display suction pressure in microprocessor. BMS Interface Volt free Contacts (BMVF) Volt free contacts for run status, common fault status, auto mode status and provision for remote on/off shall be provided as option if required. For additional requirements, please contact SKM. BMS Interface thru protocol (BMSP) For interfacing the units with major BMS protocols such as BACNet, Modbus or LON. Extra hardware may be required depending on the protocol. Condenser Fan motors with anticondensation heaters builtin (CFMA) Where application so requires. Ammeter & Phase Selector switch To indicate running AMPS of each compressor. (AMPC) Ammeter & Phase Selector switch (AMPI) To indicate running AMPS on main incomer of the unit. Voltmeter & Selector Switch For incoming line voltage. UL 1995 (VSS) (ULLISTED) Unit construction are certified and in compliance of UL 1995 safety standards. Consult SKM for availability of selected models. Voltage Monitoring Module as per DEWA (DVM) Under voltage relay as per DEWA regulations. This option is available for Dubai, UAE only. Part Winding Start (PWS) Where specifically required by local codes, compressors may be with Part Winding Start to reduce the high inrush current at starting.some of the compressors are with part winding start as standard. Refer to page 15 for more details. Unload Start Kit (USK) This option is required when the compressor needs a high starting torque such as when the load is high. Star Delta Starter (SDS) To reduce the starting current of compressors using reduced voltage starting method. Compressors will be started in Star & after few seconds it will be changed over to Delta. Circuit Breaker for Compressor (CBC) For those electrical specification calls for additional over load and short circuit protection. External Overload Protection (EOP) For those electrical specification which require additional overload protection for the compressors. Options for Field Installations Antivibration mounts (CAVM) Recommended for roof mounted units or other locations in the vicinity of occupied spaces, where noise/vibration may be objectionable. HiLo Gauges Without piping or isolating pet cocks. (CSDG) Liquid Line Controls (CRSP) Comprises of correctly sized thermostatic expansion valve, suitable solenoid valve,filter drier,sight glass and one number shutoff per circuit Extra Shut Off Valve (CXFV) Extra Shut off valve in liquid line to fully isolate the filter drier. Duct Temperature Sensor (DTS) In order to control the unit based on return / supply air duct temperature. Special custom built units incorporating specially required features like units with anticondensation resistance heaters embedded in condenser motors and for offshore application, special units with stainless steel panels can be manufactured as per customer requirement. Contact SKM for all such applications or requirements. 6

7 ENGINEERING SPECIFICATIONS 50 HZ 508D 5D 514D 52015D 52017D 52019D 521D 522D Cooling Capacity Cooling Capacity (1) (2) BTUH BTUH W W Type SemiHermetic Reciprocating 1450 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal / / / per Crkt (1/2/3/4) Liter / / / Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Quantity 628/2 628/2 723/2 723/2 723/2 823/2 823/2 823/2 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Type Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Quantity kw 0.37/2 0.37/2 0.75/2 0.75/2 0.75/2 1.5/2 1.5/2 1.5/2 Refrigerant (R 134a) Operating Charge per Circuit lbs / /8.8 11/ (1/2/3/4) (3) kg / /4 5/ Number of Refrigerant Circuits Unit Operating Weight lbs kg D 528D 52028D 52030D 530D 52034D 52040D 52045D Cooling Capacity Cooling Capacity (1) (2) BTUH BTUH W W Type SemiHermetic Reciprocating 1450 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal 1.19/ / / / / /1.25 per Crkt (1/2/3/4) Liter 4.5/ / / / / /4.73 Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Qty. 823/2 823/3 823/3 823/3 823/3 823/3 829/3 823/4 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Type Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. kw 1.5/2 1.5/3 1.5/3 1.5/3 1.5/3 1.5/3 1.5/3 1.5/4 Refrigerant (R 134a) Operating Charge per Circuit lbs 15.7/ / / / / /24.4 (1/2/3/4) (3) kg 7.1/ /6.7 / / / /11.1 Number of Refrigerant Circuits Unit Operating Weight lbs kg Notes: 1. Cooling capacity at 95 F (35 C) ambient temperature according to AHRI Cooling capacity at Gulf conditions : 115 F (46.1 C) condenser entering air temperature & 45 F (7.2 C) SST. 3. Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. 4. Condensing units are shipped with nitrogen holding charge only. Table 1 7

8 ENGINEERING SPECIFICATIONS 50 HZ 52049D 52053D 52058D 52060D 53064D 53068D 53070D Cooling Capacity Cooling Capacity (1) (2) BTUH BTUH W W Type SemiHermetic Reciprocating 1450 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal 1.25/ / / / /1.25/ /1.25/ /1.25/1.25 per Crkt (1/2/3/4) Liter 4.73/ /4.73 5/4.73 5/5 4.73/4.73/ /4.73/ /4.73/4.73 Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Quantity 823/4 829/4 829/4 829/4 823/6 823/6 823/6 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Type Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Quantity kw 1.5/4 1.5/4 1.5/4 1.5/4 1.5/6 1.5/6 1.5/6 Refrigerant (R 134a) Operating Charge per Circuit lbs 30.4/ / / / /27.1/ /28.5/ /28.5/28.5 (1/2/3/4) (3) kg 13.8/ / / / /12.3/ /12.9/ /12.9/12.9 Number of Refrigerant Circuits Unit Operating Weight lbs kg D 53084D 53086D 54095D 546D 54114D 54120D Cooling Capacity (1) BTUH W Cooling Capacity (2) BTUH W Type SemiHermetic Reciprocating 1450 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal 1.25/1.25/ /1.25/ /1.32/ /1.25/1.25/ /1.25/1.25/ /1.32/1.25/ /1.32/1.32/1.32 per Crkt (1/2/3/4) Liter 4.73/4.73/4.73 5/4.73/4.73 5/5/ /4.73/4.73/ /4.73/4.73/4.73 5/5/4.73/4.73 5/5/5/5 Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Qty. 829/6 829/6 829/6 829/8 829/8 829/8 829/8 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Type Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. kw 1.5/6 1.5/6 1.5/6 1.5/8 1.5/8 1.5/8 1.5/8 Refrigerant (R 134a) Operating Charge per Circuit lbs 35.8/35.8/ /35.9/ /35.9/ /29.3/29.3/ /36.6/36.6/ /36.6/36.6/ /36.6/36.6/36.6 (1/2/3/4) (3) kg 16.2/16.2/ /16.3/ /16.3/ /13.3/13.3/ /16.6/16.6/ /16.6/16.6/ /16.6/16.6/16.6 Number of Refrigerant Circuits Unit Operating Weight lbs kg Notes: 1. Cooling capacity at 95 F (35 C) ambient temperature according to AHRI Cooling capacity at Gulf conditions : 115 F (46.1 C) condenser entering air temperature & 45 F (7.2 C) SST. 3. Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. 4. Condensing units are shipped with nitrogen holding charge only. Table 1 ends 8

9 ENGINEERING SPECIFICATIONS 60 HZ Cooling Capacity (1) BTUH W 609D 611D BTUH Cooling Capacity (2) W Type SemiHermetic Reciprocating 1750 RPM Quantity Compressor Oil Charge(Polyol Ester) US Gal / / / per Crkt (1/2/3/4) Liter / / / Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Quantity 628/2 628/2 723/2 723/2 723/2 823/2 823/2 823/2 Condenser Fan cfm Air Flow Rate l/s Type Totally enclosed, air over Class F insulation, 6pole, IP55 Condenser Motor Size / Quantity kw 0.55/2 0.55/2 1.1/2 1.1/2 1.1/2 2.2/2 2.2/2 2.2/2 Refrigerant (R 134a) Operating Charge per Circuit lbs / / / (1/2/3/4) (3) kg / /4 5/ Number of Refrigerant Circuits lbs Unit Operating Weight kg D 62018D 62020D D 624D 626D Cooling Capacity (1) Notes: BTUH W 62026D 632D BTUH Cooling Capacity (2) W Type SemiHermetic Reciprocating 1750 RPM Quantity Compressor Oil Charge(Polyol Ester) US Gal 1.19/ / / / / /1.25 per Crkt (1/2/3/4) Liter 4.5/ / / / / /4.73 Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Qty. 823/2 823/3 823/3 823/3 823/3 823/3 829/3 823/4 Condenser Fan cfm Air Flow Rate l/s Type Totally enclosed, air over Class F insulation, 6pole, IP55 Condenser Motor Size / Qty. kw 2.2/2 2.2/3 2.2/3 2.2/3 2.2/3 2.2/3 2.2/3 2.2/4 Refrigerant (R 134a) Operating Charge per Circuit lbs 15.7/ / / / / /24.4 (1/2/3/4) (3) kg 7.1/ /7.3.5/ / / /11.1 Number of Refrigerant Circuits lbs Unit Operating Weight kg D 62034D D 1. Cooling capacity at 95 F (35 C) ambient temperature according to AHRI Cooling capacity at Gulf conditions : 115 F (46.1 C) condenser entering air temperature & 45 F (7.2 C) SST. 3. Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. 4. Condensing units are shipped with nitrogen holding charge only D 62046D 62052D Table 2 9

10 ENGINEERING SPECIFICATIONS 60 HZ Cooling Capacity (1) BTUH W 62058D 62062D BTUH Cooling Capacity (2) W Type SemiHermetic Reciprocating 1750 RPM Quantity Compressor Oil Charge(Polyol Ester) US Gal 1.25/ / / / /1.25/ /1.25/ /1.25/1.25 per Crkt (1/2/3/4) Liter 4.73/ /4.73 5/4.73 5/5 4.73/4.73/ /4.73/ /4.73/4.73 Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Quantity 823/4 829/4 829/4 829/4 823/6 823/6 823/6 Condenser Fan cfm Air Flow Rate l/s Type Totally enclosed, air over Class F insulation, 6pole, IP55 Condenser Motor Size / Quantity kw 2.2/4 2.2/4 2.2/4 2.2/4 2.2/6 2.2/6 2.2/6 Refrigerant (R 134a) Operating Charge per Circuit lbs 30.4/ / / / /28.5/ /28.5/ /28.5/28.5 (1/2/3/4) (3) kg 13.8/ / / / /12.9/ /12.9/ /12.9/12.9 Number of Refrigerant Circuits lbs Unit Operating Weight kg D 62071D 63074D D 63082D Cooling Capacity (1) Notes: BTUH W 63094D BTUH Cooling Capacity (2) W Type SemiHermetic Reciprocating 1750 RPM Quantity Compressor Oil Charge(Polyol Ester) US Gal 1.25/1.25/ /1.25/ /1.32/ /1.25/1.25/ /1.25/1.25/ /1.32/1.25/ /1.32/1.32/1.32 per Crkt (1/2/3/4) Liter 4.73/4.73/4.73 5/4.73/4.73 5/5/ /4.73/4.73/ /4.73/4.73/4.73 5/5/4.73/4.73 5/5/5/5 Type Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Type Propeller direct drive 960 RPM Code / Qty. 829/6 829/6 829/6 829/8 829/8 829/8 829/8 Condenser Fan cfm Air Flow Rate l/s Type Totally enclosed, air over Class F insulation, 6pole, IP55 Condenser Motor Size / Qty. kw 2.2/6 2.2/6 2.2/6 2.2/8 2.2/8 2.2/8 2.2/8 Refrigerant (R 134a) Operating Charge per Circuit lbs 35.9/35.9/ /35.9/ /35.9/ /29.3/29.3/ /36.6/36.6/ /36.6/36.6/ /36.6/36.6/36.6 (1/2/3/4) (3) kg 16.3/16.3/ /16.3/ /16.3/ /13.3/13.3/ /16.6/16.6/ /16.6/16.6/ /16.6/16.6/16.6 Number of Refrigerant Circuits lbs Unit Operating Weight kg Cooling capacity at 95 F (35 C) ambient temperature according to AHRI Cooling capacity at Gulf conditions : 115 F (46.1 C) condenser entering air temperature & 45 F (7.2 C) SST. 3. Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. 4. Condensing units are shipped with nitrogen holding charge only D 630D 64113D 64124D 64132D 64140D Table 2 ends

11 CAPACITY RATINGS 50 HZ 508D 5D 514D 521D 522D 528D 530D 52015D 52017D 52019D 52022D 52028D 52030D 52034D 52040D Note: Condenser Entering Air Temperature ºF (ºC) SST 95 F (35 C) 5 F (40 C) 115 F (46 C) 125 (52 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* F C MBH kw kw MBH kw kw MBH kw kw MBH kw kw Table 3 * Power Input mentioned in these pages should not be used for Cable/Fuse selection. MCA & MFA Values given in the electrical data (Pages 19 to 23) should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 11

12 CAPACITY RATINGS 50 HZ 52045D 52049D 52053D 52058D 52060D 53064D 53068D 53070D 53080D 53084D 53086D 54095D 546D 54114D 54120D Note: Condenser Entering Air Temperature ºF (ºC) SST 95 F (35 C) 5 F (40 C) 115 F (46 C) 125 (52 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* F C MBH kw kw MBH kw kw MBH kw kw MBH kw kw Table 3 ends * Power Input mentioned in these pages should not be used for Cable/Fuse selection. MCA & MFA Values given in the electrical data (Pages 19 to 23) should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 12

13 CAPACITY RATINGS 60 HZ 609D 611D 616D 624D 626D 632D 636D 62018D 62020D 62022D 62026D 62032D 62034D 62040D 62046D Note: Condenser Entering Air Temperature ºF (ºC) SST 95 F (35 C) 5 F (40 C) 115 F (46 C) 125 (52 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* F C MBH kw kw MBH kw kw MBH kw kw MBH kw kw Table 4 * Power Input mentioned in these pages should not be used for Cable/Fuse selection. MCA & MFA Values given in the electrical data (Pages 19 to 23) should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 13

14 CAPACITY RATINGS 60 HZ 62052D 62058D 62062D 62067D 62071D 63074D 63078D 63082D 63094D 63098D 630D 64113D 64124D 64132D 64140D Note: Condenser Entering Air Temperature ºF (ºC) SST 95 F (35 C) 5 F (40 C) 115 F (46 C) 125 (52 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* F 50.0 C MBH kw 48.2 kw MBH kw 50.9 kw MBH kw 53.7 kw MBH kw 57.0 kw Table 4 ends * Power Input mentioned in these pages should not be used for Cable/Fuse selection. MCA & MFA Values given in the electrical data (Pages 19 to 23) should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 14

15 Compressor Starting The D Units standard mode of compressor starting is given as per Table No. 5. Maximum Instantaneous Current Flow (ICF) as shown in Electrical Specifications, Pages 19 23, must be used in determining the need for part winding start for models with DOL as standard. If part winding start is required, please specify option PWS at enquiry/order, available only for the models shown with PWS as option in Table 5. Power Supply ( V/Ph/Hz ) 380~415/3/50, 380/3/60, 460/3/60 440/3/50 220/3/60 Standard Option Standard Option Standard Option 508D 609D 5D 611D 514D 616D 52015D 62018D DOL PWS 52017D 62020D DOL PWS DOL 52019D 62022D 521D 624D 522D 626D PWS 52022D 62026D DOL PWS 528D 632D PWS PWS PWS 52028D 62032D 52030D 62034D DOL PWS DOL DOL PWS 530D 636D PWS ** PWS 52034D 62040D DOL PWS 52040D 62046D 52045D 62052D DOL PWS DOL 52049D 62058D 52053D 62062D PWS 52058D 62067D PWS 52060D 62071D ** 53064D 63074D 53068D 63078D DOL PWS DOL 53070D 63082D PWS 53080D 63094D PWS 53084D 63098D PWS 53086D 630D ** 54095D 64113D DOL PWS DOL 546D 64124D PWS 54114D 64132D PWS 54120D 64140D ** ** For Details, Please consult SKM Table 5 15

16 Capacity Control Steps The Standard Capacity Control Steps are shown below. Standard Number of Steps Optional Number of Steps 508D 609D D 611D D 616D D 62018D D 62020D D 62022D D 624D D 626D D 62026D D 632D D 62032D D 62034D D 636D D 62040D D 62046D D 62052D D 62058D D 62062D D 62067D D 62071D D 63074D D 63078D D 63082D D 63094D D 63098D D 630D D 64113D D 64124D D 64132D D 64140D Table 6 Selection Procedure Example The following information should be determined: 1. Required total capacity = 430 MBh (126 kw) 2. Saturated suction temperature = 50 F ( C) 3. Condenser entering air temperature = 115 F (46 C) 4. Power Supply (V/Ph/Hz) = 380/3/50 Enter capacity ratings from Table 3 at 115 F (46 C) condenser entering air temperature and select model 52040D having a cooling capacity of MBh (129.6 kw) at 50 F ( C) saturated suction temperature, compressor motor power input is 43.8 kw. For further details refer to physical data and specifications sheets. Capacity ratings are based on sea level operation. Above sea level, apply the following corrections method. Actual capacity (at level) = Sea level capacity x altitude correction factor (from Table 7). Altitude Correction Factors The unit ratings are based on sea level. Above sea level apply the following correction factors: Altitude Capacity Power feet meter Multiplier Multiplier Table 7 16

17 Field Connections D series selfcontained heavy duty air cooled condensing units are designed for minimum field interaction. Power hookups for AHU starter and fan interlock and control wiring of room unit as per Electrical hookup diagram is all that is required to electrically connect any model of D series. Every D series condensing unit requires, at most, field installed fused disconnect switches or circuit breakers, and room unit. Refer below for a schematic representation of required field electrical hookups for a standard D series condensing unit. All field wiring must be done in accordance with applicable local and national codes. For maximum recommended fuse sizes and minimum circuit amps for cable sizing, see Page of this bulletin. The D series is then ready to provide cooling, on demand. Field Wiring Requirement Schematic 3 PHASE, 3 WIRE SYSTEM 440V/3PH/50Hz 220V/3PH/60Hz 460V/3PH/60Hz L1 L2L3 N CIRCUIT BREAKER OR FUSED DISCONNECT SWITCH (NOT BY SKM) ** L N L1 L2 L3 N CIRCUIT BREAKER OR FUSED DISCONNECT SWITCH (NOT BY SKM) L1 L2 L3 N 3 PHASE, 4 WIRE SYSTEM V/3PH/50Hz 380V/3PH/60Hz L1 L2 GROUND E 3 PHASE, 4 WIRE SYSTEM V/3PH/50Hz 380V/3PH/60Hz EFM STARTER INTERLOCK TO AHU AHU STARTER BOX (BY OTHERS) CUSTOMER SUPPLIED AND INSTALLED FIELD ACCESSORY (CONTACTOR, OVERLOAD RELAY & ON/OFF CONTROL etc.) FAN INTERLOCK FROM AHU DOL/STAR DELTA ROOM UNIT (LOOSESUPPLY) U V W M 3 ~ CE+ + CE E AIR HANDLING UNIT D SERIES CONTROL PANEL REFER ACTUAL WIRING DIAGRAM FURNISHED WITH THE UNIT FOR EXACT IDENTIFICATION OF WIRE NUMBERS. 2 CORE UNSCREENED TWISTED PAIR CABLE (BY OTHERS) LINE VOLTAGE FIELD WIRING LOW VOLTAGE FIELD WIRING ** D SERIES UNITS RATEDFOR 440V/3PH/50Hz, 460V/3PH/60Hz, ORPOWER SUPPLIES WITH OUTNEUTRAL REQUIRESEPARATE SOURCEOF CONTROLPOWERSUPPLY THRUFIELD SUPPLIED & INSTALLED 15A/220VFUSED CONTROL DISCONNECT SWITCH OR ORDER WITH FACTORYBUILTIN OPTION ' CXT '. 17

18 I I Typical Wiring Diagram MICROPROCESSOR CONTROLLER 24V 24~ G0 T9 Q12 Q11 Q14 T Q22 Q21 Q24 Q33 Q34 Q43 Q44 T11 Q53 TFR E C3 C4 C5 C6 CR3 220~ 240V T8 _ CFM1 CFM2 Q64 Q54 Q73 CFM3 CFM4 EFM HPS1 HPS2 Q74 Q84 T12 C D01 D02 T13 DL1 DN DL2 TIP THI CCH1 CCH2 C1 CR1 C2 CR2 INFO ESC RS485 PB OK C1 C2 B1 T1 B2 M M B3 T2 X1 M X2 5V= 24V= X3 M X4 T3 X5 M DISC. PRESSURE1 DISC. PRESSURE2 X6 5V= L1 L2 L3 N N L1 C1 MCB1 CM1 MCB2 G G CS 24~ _ LPS1 LPS2 24V= T4 X7 M X8 D1 M D2 T5 DU1 DG DU2 T6 A+ RUN/STOP B REF T7 CE+ CE 2CORE UNSCREENED TWISTED PAIR CABLE (BY OTHERS) ** POWERSUPPLY MPCB1 MPCB2 MPCB3 MPCB4 I> I> I> I> I> I> I> I> I> I> I> I> C2 C3 C4 C5 C6 L CM2 CFM1 CFM2 CFM3 CFM4 M CR4 CR5 ROOM UNIT (LOOSESUPPLY) + M MP1 MP2 11 L 1 P 1 CR4 CR5 N 14 L 11 2 N M L OPS1 M OPS2 CR6 CR7 OPS1 OPS2 MP1 MP2 CR6 CR7 P VOLTFREECONTACTTO MATCHINGAHUFOR CR3 EFMSTARTER INTERLOCK CR1 CR2 LSV1 LSV2 OFH1 R COMP.1 LSV1 OFH2 R COMP.2 LSV2 (BY OTHERS) FAN INTERLOCK FROM AHU CR8 * * PROVIDE OVERCURRENT, EARTH FAULT PROTECTION,SHORT CIRCUITAND DISCONNECT MEANS AS REQUIREDBYLOCAL & NATIONAL ELECTRICCODE. NOTE: * * * Typical wiring diagramgivenhereisfor unitswith380~ 415/3/50 or 380/3/60, 4 wire power supplies. Wiringdiagramsfor 440/3/50, 220/3/60 or460/3/60 power supplies are available on request. For 440/3/50 or 460/3/60 or power supplies without neutral, CXT option is a must. L EGEND SWITCH OFH OIL P PRESSURE ACTIVATED FAILURE HEATER TFR TRANSFORMER OPS OIL PRESSURESWITCH CS CONTROL SWITCH MP MOTOR PROTECTOR C CONTACTOR MPCB MOTOR PROTECTOR CIRCUT BREAKER CCH CRANK CASE HEATER OL OVERLOADRELAY MCB MINIATURECIRCUIT BREAKER LSV LIQUID LINE SOLENOID VALVE CFM CONDENSER FAN MOTOR EFM EVAPORATORFANMOTOR CM COMPRESSOR MOTOR CR CONTROL RELAY LPS LOW PRESSURE SWITCH FIELD WIRING HPS HIGH PRESSURESWITCH CR8 FAN INTERLOCK 18

19 ELECTRICAL DATA LEGEND: MFA Unit Characteristic MCA ICF Compressor Power Supply: 380~415V/3PH/50Hz Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA 508D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D Table 8 MFA MCA Maximum Fuse Ampere (For Fuse/ circuit breaker sizing complies with NEC Article & Minimum Circuit Amps (For Wire sizing), complies with NEC Article DOL PWS LRA Direct On Line Start Part Winding Start Locked Rotor Amps RLA Rated Load Amps (at Worst operating Condition). FLA Full Load Amps ICF Maximum Instantaneous Current Flow. Note : Voltage imbalance not to exceed ± 2 % of the rated voltage 19

20 ELECTRICAL DATA MFA Unit Characteristic MCA ICF Compressor Power Supply: 440V/3PH/50Hz Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA 508D D D D D D D D D D D D D For Details, Please consult SKM 52034D D D D D D 52060D For Details, Please consult SKM 53064D D D D D 53086D For Details, Please consult SKM 54095D D D 54120D For Details, Please consult SKM LEGEND: Table 9 MFA MCA Maximum Fuse Ampere (For Fuse/ circuit breaker sizing complies with NEC Article & Minimum Circuit Amps (For Wire sizing), complies with NEC Article DOL PWS LRA Direct On Line Start Part Winding Start Locked Rotor Amps RLA Rated Load Amps (at Worst operating Condition). FLA Full Load Amps ICF Maximum Instantaneous Current Flow. Note : Voltage imbalance not to exceed ± 2 % of the rated voltage 20

21 ELECTRICAL DATA MFA Unit Characteristic MCA ICF Compressor Power Supply: 380V/3PH/60Hz Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA 609D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D LEGEND: Table MFA MCA Maximum Fuse Ampere (For Fuse/ circuit breaker sizing complies with NEC Article & Minimum Circuit Amps (For Wire sizing), complies with NEC Article DOL PWS LRA Direct On Line Start Part Winding Start Locked Rotor Amps RLA Rated Load Amps (at Worst operating Condition). FLA Full Load Amps ICF Maximum Instantaneous Current Flow. Note : Voltage imbalance not to exceed ± 2 % of the rated voltage 21

22 ELECTRICAL DATA MFA Unit Characteristic MCA ICF Compressor Power Supply: 460V/3PH/60Hz Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA 609D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D LEGEND: Table 11 MFA MCA Maximum Fuse Ampere (For Fuse/ circuit breaker sizing complies with NEC Article & Minimum Circuit Amps (For Wire sizing), complies with NEC Article DOL PWS LRA Direct On Line Start Part Winding Start Locked Rotor Amps RLA Rated Load Amps (at Worst operating Condition). FLA Full Load Amps ICF Maximum Instantaneous Current Flow. Note : Voltage imbalance not to exceed ± 2 % of the rated voltage 22

23 ELECTRICAL DATA MFA Unit Characteristic MCA ICF Compressor Power Supply: 220V/3PH/60Hz Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA 609D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D LEGEND: Table 12 MFA MCA Maximum Fuse Ampere (For Fuse/ circuit breaker sizing complies with NEC Article & Minimum Circuit Amps (For Wire sizing), complies with NEC Article DOL PWS LRA Direct On Line Start Part Winding Start Locked Rotor Amps RLA Rated Load Amps (at Worst operating Condition). FLA Full Load Amps ICF Maximum Instantaneous Current Flow. Note : Voltage imbalance not to exceed ± 2 % of the rated voltage 23

24 s 508D5D & 609D611D Dimensional Data s: 508D5D & 609D611D s 508D5D & 609D611D LEGEND 1 CONDENSER FAN 2 CONDENSER COIL 3 CONTROL PANEL 4 COMPRESSOR ALL DIMENSIONS ARE IN INCHES [mm] A1 A3 A2 A [1143] 68 [1727] VENTILATION PLATE FOR ON BOTH SIDES SUCTIONØ 51.6 [1312] DETACHABLE PLATE FOR CABLE ENTRY 18 [457] LIQUIDØ RIGGING HOLES Ø0.79 [20] 4 Nos. 7 [178] s 514D to 52022D & 616D to 62026D 8 [203] ACCESS 3.9 [0] s: 514D 52022D & 616D 62026D s 514D to 52022D & 616D to 62026D LEGEND 1 LEGEND2 CONDENSER COIL 1 CONDENSER 3 CONTROL FAN PANEL 4 COMPRESSOR MODEL DIMENSIONS ALL DIMENSIONS ARE LIN INCHES W [mm] H A B *514D *616D [1422] [1880] [1312] [525] 52015D D [1422] [1880] [1312] [457] [457] 52017D D [1422] [1930] [1312] [457] [457] 52019D D [1422] [2134] [1515] [457] [457] *521D *624D [1473] [2134] [1515] [525] *522D *626D [1473] [2134] [1515] [577] 52022D D [1473] [2134] [1515] [525] [457] *MODEL WITH ONE COMPRESSOR DIM.12" INSTEAD OF " & 4" FOR ONE COMPRESSOR MODEL ALL DIMENSIONS ARE IN INCHES [mm] 3 CONDENSER FAN 2 CONDENSER 4 COMPRESSOR COIL 3 CONTROL ALL DIMENSIONS PANEL ARE IN INCHES [mm] 3 L L 1 1 Table 13 A1 A2 A1 A3 A2 A4 W W A3 A4 VENTILATION ON BOTH ON BOTH SIDES SIDES 2 H 2 SUCTION #1 LIQUID #1 H SUCTION #1 LIQUID #1 SUCTION #2 LIQUID #2 RIGGING HOLES Ø0.79 [20] 4 Nos. SUCTION #2 LIQUID #2 RIGGING HOLES Ø0.79 [20] 4 Nos. DETACHABLE PLATE DETACHABLE FOR CABLE PLATE ENTRYFOR CABLE ENTRY 3.94 [0] A 3.94 [0] A B B [178] 4* [1] * 7 [178] ACCESS 4* [1] * ACCESS 4 * [1] * 7 [178] 4 * [1] * 7 [178] 24

25 SKM Air Cooled Condensing Units Dimensional Data s 528D to 52040D & 632D to 62046D s: 528D 52040D & 632D 62046D A1 A3 LEGEND 1 CONDENSER FAN 2 CONDENSER COIL s 528D to 52040D & 632D to 62046D A1 4 COMPRESSOR ALL DIMENSIONS ARE IN INCHES [mm] A3 A2 3 CONTROL PANEL LEGEND 1 CONDENSER FAN DIMENSIONS MODEL COIL 2 CONDENSER H A 3 CONTROL PANEL *528D COMPRESSOR *632D [1540] [630] ALL DIMENSIONS ARE IN INCHES [mm] 52028D D 52030D 62034D *530D *636D 52034D 62040D 52040D 62046D A4 A2 A4 76 [1930] 3 [1540] [1540] [1540] [1947] [1947] [525] [525] 24.8 [630] [525] [525] B [525] 18 [457] [525] [525] *MODEL WITH ONE COMPRESSOR DIM.12" INSTEAD OF " & 4" FOR ONE COMPRESSOR MODOL Table 14 ALL DIMENSIONS ARE IN INCHES [mm] 88 [2235] 76 1 [1930] 3 88 [2235] SUCTION #1 1 SUCTION #2 SUCTION #1 2 VENTILATION ON BOTH SIDES VENTILATION SUCTION #2 LIQUID #1 2 LIQUID #2 LIQUID #2 H LIQUID #1 4* [2] 4* [2] ACCESS ACCESS * * * 7 [178] B 4 *4 * [2] [2] 7 [178] 77 [178] [178] 4 4 B AA 3.9 DETACHABLE DETACHABLE PLATE FOR PLATE FOR CABLE ENTRY CABLE ENTRY 3.9 [0] [0] H ON BOTH SIDES * s 52045D to 52060D & 62052D to 62071D s: 52045D 52060D & 62052D 62071D s 52045Dto 52060D & 62052D to 62071D LEGEND 1 LEGEND CONDENSER FAN 2 CONDENSER COIL A3 A1 A1 1 CONDENSER FAN 3 CONTROL PANEL 2 CONDENSER COIL 4 COMPRESSOR 3 CONTROL ALL DIMENSIONS AREPANEL IN INCHES [mm] A3 4 COMPRESSOR DIMENSIONS MODEL H ARE IN INCHES A ALL DIMENSIONS [mm]b H SUCTION #2 SUCTION #1 SUCTION #2 ACCESS 4 [2] LIQUID #2 B 8 [203] 4 [2] A 25 8 [203] ACCESS 8 [203] 4 Table 15 LIQUID #2 LIQUID # [125] RIGGING HOLES Ø.79 [20] 4 Nos [602] 23.7 [602] [655] [655] [655] B 2 4 DETACHABLE PLATE FOR CABLE ENTRY LIQUID # [125] DETACHABLE PLATE FOR CABLE ENTRY 88 [2235] SUCTION # FILTERED VENTILATION ON BOTH SIDES A [2134] 88 [2235] A FILTERED VENTILATION ON BOTH SIDES 23.7 [602] [655] [655] [655] [655] ALL DIMENSIONS ARE IN INCHES [mm] 84 [2134] H A2 A [1972] [2175] [2175] [2175] [2175] 8 [203] A D 62052D 52049D 62058D 52053D 62062D 52058D 62067D 52060D 62071D

26 SKM Air Cooled Condensing Units Dimensional Data s 53064D to 53086D & 63074D to 630D s: 53064D 53086D & D A1 LEGEND 1 CONDENSER FAN s 53064D to 53086D & 63074D to 630D 2 CONDENSER COIL 3 CONTROL PANEL 1 CONDENSER FAN ALL 2 DIMENSIONS CONDENSER ARE COILIN INCHES [mm] CIRCUITA CIRCUITB CIRCUITC 3 CONTROL PANEL 4 COMPRESSOR ALL DIMENSIONS ARE IN INCHES [mm] A3 A1 LEGEND 4 COMPRESSOR A3 A5 A5 CIRCUITA CIRCUITB CIRCUITC A4 A2 A2 88 [2235] A4 47 [1195] [3445] 1 2 A [2250] [2250] 2 47 [1195] 88 [2235] A [3445] 12 [305] PARTITION 12 [305] PARTITION [2690] [2690] [2420][2420] 3 FILTERED VENTILATION FILTERED ON BOTH SIDES LIQUID Øx3Nos. VENTILATION ON BOTH SIDES LIQUID Øx3Nos [125][125] DETACHABLE [750][750] PLATE FOR DETACHABLE CABLE PLATE FOR ENTRY CABLE ENTRY SUCTION Øx3Nos. SUCTION Øx3Nos. RIGGING HOLES 4 4 RIGGING HOLES Ø8/7 [22] x 4 Nos. Ø8/7 [22] x 4 Nos. s: 54095D 54120D &toto D 64113D 64140D 64140D s s 54095D to54120d 54120D && 64113D 64140D LEGEND LEGEND 1 CONDENSER FAN 1 CONDENSER FAN [508][508] A1 A3 A2 A4 A1 2 CONDENSER COIL 2 CONDENSER COIL A5 A3 A7 A5 A7 3 CONTROL PANEL 3 CONTROL PANEL 4 COMPRESSOR 4 COMPRESSOR ALL DIMENSIONS ARE IN INCHES [mm] ALL DIMENSIONS ARE IN INCHES [mm] CIRCUITA CIRCUITA CIRCUITB CIRCUITC CIRCUITB CIRCUITD CIRCUITC CIRCUITD A2 88 [2235] 88.6 [2250] 88.6 [2250] PARTITION 88 [2235] A A4 [4500] A8 A [4500] 1 2 A PARTITION [2250] 1 2 PARTITION 88.6 [2250] PARTITION 12 [305] 12 [305] [2715] [2420] 3 FILTERED VENTILATION ON BOTH SIDES LIQUID Øx4Nos [750] 29.5 [750] 5.92 [150] 6.92 [2715] [2420] 5.92 [150] FILTERED VENTILATION DETACHABLE BOTH SIDES PLATEON FOR CABLE ENTRY LIQUID Øx4Nos. SUCTION Øx4Nos. SUCTION Øx4Nos. 4 RIGGING HOLES Ø8/7 [22] x 4 Nos. 4 RIGGING HOLES Ø8/7 [22] x 4 Nos. DETACHABLE PLATE FOR CABLE ENTRY 4 4

27 LOADING POINTS 50 Hz 508D 5D 514D 52015D 52017D 52019D 521D 522D 52022D 528D 52028D 52030D 530D 52034D 52040D 52045D 52049D 52053D 52058D 52060D 53064D 53068D 53070D 53080D 53084D 53086D 54095D 546D 54114D 54120D UNIT LOADING POINTS A1 A2 A3 A4 A5 A6 A7 A8 TOTAL WEIGHT Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Table 16 27

28 LOADING POINTS 60 Hz 609D 611D 616D 62018D 62020D 62022D 624D 626D 62026D 632D 62032D 62034D 636D 62040D 62046D 62052D 62058D 62062D 62067D 62071D 63074D 63078D 63082D 63094D 63098D 630D 64113D 64124D 64132D 64140D 28 UNIT LOADING POINTS TOTAL A1 A2 A3 A4 A5 A6 A7 A8 WEIGHT Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Ib Kg Table 17

29 Location and Space Requirements Due to the vertical air flow discharge condenser design, it is recommended that certain precautions are to be taken before installation. There should be no obstruction on the air flow. Orient the unit so that prevailing winds blow parallel to the unit length thus minimizing the effects on condensing pressure. If it is not practical to orient the unit in this manner, a wind deflecting shield should be considered. It is also necessary to provide adequate clearance on all sides of the unit for service access and satisfactory performance. This will prevent excessive condensing temperatures and enhance system performance and operating economy. A flat concrete foundation or floor which can support the weight of the equipment must be provided as the unit must be level for proper operation and functioning of controls. Under certain critical conditions it is recommended that vibration isolators of rubberinshear or spring type be installed under the base. The isolators must be designed for the operating weight of the unit. For operating load points refer to Loading Points Data (page 27 & 28).Correct selection of types of isolators depends upon application and structure. A B C 508D 609D 42 5D 611D 514D 616D D 62018D D 62020D 52019D 62022D 521D 624D 522D 626D D 62026D D 632D 52028D 62032D 52030D 62034D D 636D 52034D 62040D 52040D 62046D D 62052D 52049D 62058D 52053D 62062D D 62067D 52060D 62071D 53064D 63074D 53068D 63078D 53070D 63082D 53080D 63094D 53084D 63098D 53086D 630D D 64113D 546D 64124D 54114D 64132D 54120D 64140D ALL DIMENSIONS ARE IN INCHES [mm] Table 18 Single Unit Installation SPACING FOR SERVICE DUCT A SPACING FOR AIR FLOW B DUCT A B A DUCT PACV 52060D & 52065D PACV 62070D & 62076D 78 [1981] PACV 508D TO 52055D PACV 609D TO 62064D A DUCT DUCT 46 [1165] A * A * B * SPACING FOR BOTH AIR FLOW AND SERVICE PACV 53070D TO 54125D PACV 63082D TO 64145D 29

30 A*B Multiple Units Installation SPACING FOR SERVICE AND ACCESS SPACING FOR AIR FLOW B A A B C A * C * 508D to 52060D 609D to 62071D 53064D to 54120D 63074D to 64140D * SPACING FOR AIRFLOW & SERVICE 30

31 Typical Refrigeration Piping Legend 1 1. Expansion Valve. 2. Sight Glass. 3. Solenoid Valve. 4. Filter Drier. 5. Shut Off Valve. 6. Liquid Line. 7. Suction Line. CONDENSING UNIT AIR FLOW AHU AIR FLOW 5 AHU CONDENSING UNIT Single Circuit Unit Shown. For unit with multiple circuits, piping will be identical. DOTTED IN CASE OF DOUBLE SUCTION RISER Refrigerant Piping Correct design and size of refrigerant piping is necessary for proper operation. The refrigerant piping generally should be designed to accomplish the following: a. To ensure proper refrigerant feed to the evaporator. b. To provide practical refrigerant line sizes without excessive pressure drop. c. To maintain uniform return of lubricating oil to the compressor. d. To prevent liquid refrigerant from entering the compressor and causing compressor damage due to "slugging". Field Expansion Valve Selection The following recommendations should be taken into consideration when selecting expansion valves in field. 1. Expansion valves should be installed as close to the evaporator as possible, mounted directly to the distributor. 2. The following possible sources of pressure drop to be considered: a. Friction losses through refrigerant lines. b. Pressure drop across valves and controls. c. Pressure drop due to vertical lift of liquid line for R134a 1 F (0.55 C) sub cooling must be allowed for each 5.5 ft (1.7m) vertical rise in order to avoid flash gas forming due to the weight of the column of liquid refrigerant. SKM D Series units are designed with a sub cooling circuit enough to sub cool the liquid 12 F (6.6 C), which gives the liquid maximum 66 ft. (20m) lift without additional sub cooling. Liquid suction heat exchanger can be used for additional sub cooling in order to avoid flash gas forming. Matching DX Coil Selection For single circuit D Series, the DX coil selection in a MAH or other air handler from SKM should be based on total capacity. For multiple circuit D Series, extra care should be exercised and correspondingly split, by face area or number of rows to correspond and match the capacity split available in the multiple circuited D Series selected. For optimum matching the DX coil should be ordered from SKM as well. SKM provides correct no. of feeds and circuits and properly sized distribution to ensure the correct split on the DX coil is made available to match the particular selected D Series model. 31

32 Recommended Refrigerant Line Sizes 50 Hz Liquid Line, Inches Suction Line, Inches Circuit 1 Circuit 2 Circuit 3 Circuit 4 Circuit 1 Circuit 2 Circuit 3 Circuit 4 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 508D 1/2 5/8 5/8 5/8 1 3/8 1 3/8 1 5/8 1 5/8 5D 5/8 5/8 7/8 7/8 1 3/8 1 3/8 1 5/8 1 5/8 514D 5/8 7/8 7/8 7/8 1 3/8 1 5/8 2 1/8 2 1/ D 1/2 5/8 5/8 5/8 1/2 5/8 5/8 5/8 1 3/8 1 3/8 1 5/8 1 5/8 1 3/8 1 5/8 1 5/8 1 5/ D 5/8 5/8 7/8 7/8 1/2 5/8 5/8 5/8 1 3/8 1 3/8 1 5/8 1 5/8 1 3/8 1 5/8 1 5/8 1 5/ D 5/8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 1 3/8 1 3/8 1 5/8 1 5/8 1 3/8 1 5/8 1 5/8 1 5/8 521D 7/8 7/8 7/8 7/8 1 5/8 2 1/8 2 1/8 2 1/8 522D 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 1/8 2 5/ D 5/8 7/8 7/8 7/8 5/8 5/8 7/8 7/8 1 3/8 1 5/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 1 5/8 528D 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/ D 5/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 1 3/8 1 5/8 2 1/8 2 1/8 1 3/8 2 1/8 2 1/8 2 1/ D 7/8 7/8 7/8 7/8 5/8 5/8 7/8 7/8 1 5/8 2 1/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 1 5/8 530D 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 1 5/8 2 1/8 2 1/8 2 1/8 1 3/8 2 1/8 2 1/8 2 1/ D 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 1 5/8 2 1/8 2 1/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/ D 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 2 1/8 2 1/8 2 1/8 2 5/8 1 5/8 2 1/8 2 1/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/ D 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 546D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 SKM D Series Condensing Units are designed for satisfactory operation with single suction line. 1. Suction Line sizing selection recommendation in Table 19 is based on 2ºF temperature drop. 2. Double suction risers, for applications with systems having large variations in capacity, are recommended to ensure proper oil flow up and return to compressor. 3. Liquid line sizing selection recommendation in Table 19 is based on 2ºF temperature drop. 4. Recommended line sizes in Table 19 are for guidance only. For detailed proper piping, consult recognized piping references like ASHRAE Guide and Data Book for assistance. 5. Equivalent suction and liquid line lengths are shown in Table 19. Table 19 SKM is not responsible for faulty or improper design or sizing of refrigerant lines. The above recommendations do not incorporate necessary slopes, etc. that may be required on horizontal risers, etc. 32

33 Recommended Refrigerant Line Sizes 60 Hz Circuit 1 Circuit 2 Liquid Line, Inches Circuit 3 Circuit 4 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 609D 1/2 5/8 5/8 7/8 1 3/8 1 3/8 1 5/8 1 5/8 611D 5/8 5/8 7/8 7/8 1 3/8 1 5/8 1 5/8 2 1/8 616D 5/8 7/8 7/8 7/8 1 5/8 2 1/8 2 1/8 2 1/ D 1/2 5/8 5/8 7/8 1/2 5/8 5/8 7/8 1 3/8 1 3/8 1 5/8 1 5/8 1 3/8 1 5/8 1 5/8 1 5/ D 5/8 5/8 7/8 7/8 1/2 5/8 5/8 7/8 1 3/8 1 5/8 1 5/8 2 1/8 1 3/8 1 5/8 1 5/8 1 5/ D 5/8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 1 3/8 1 5/8 1 5/8 2 1/8 1 3/8 1 5/8 1 5/8 2 1/8 624D 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 1/8 2 5/8 626D 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/ D 5/8 7/8 7/8 7/8 5/8 5/8 7/8 7/8 1 5/8 2 1/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 2 1/8 632D 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/ D 5/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 1 5/8 2 1/8 2 1/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/ D 7/8 7/8 7/8 1 1/8 5/8 5/8 7/8 7/8 2 1/8 2 1/8 2 1/8 2 5/8 1 3/8 1 5/8 1 5/8 2 1/8 636D 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 7/8 7/8 1 1/8 5/8 7/8 7/8 7/8 2 1/8 2 1/8 2 1/8 2 5/8 1 5/8 2 1/8 2 1/8 2 1/ D 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/ D 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 630D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/ D 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 Circuit 1 Circuit 2 Suction Line, Inches Circuit 3 Circuit 4 SKM D Series Condensing Units are designed for satisfactory operation with single suction line. Table Suction Line sizing selection recommendation in Table 20 is based on 2ºF temperature drop. 2. Double suction risers, for applications with systems having large variations in capacity, are recommended to ensure proper oil flow up and return to compressor. 3. Liquid line sizing selection recommendation in Table 20 is based on 2ºF temperature drop. 4. Recommended line sizes in Table 19 are for guidance only. For detailed proper piping, consult recognized piping references like ASHRAE Guide and Data Book for assistance. 5. Equivalent suction and liquid line lengths are shown in Table 19. SKM is not responsible for faulty or improper design or sizing of refrigerant lines. The above recommendations do not incorporate necessary slopes, etc. that may be required on horizontal risers, etc. 33

34 GUIDE SPECIFICATIONS GENERAL FEATURES Condensing units shall be composed of compressor(s), fan(s), Coil(s), refrigerant piping, electrical components & enclosing cabinet in one piece. Unit shall be factory assembled, internally wired, piping connections terminated with sealed and soldered copper pipe ends. Unit shall be shipped with nitrogen holding charge (actual charging with refrigerant R134a should be done at site). Unit shall be capable to operate from 50 F ( C) to 125 F (52 C) ambient temperature and shall be rated in accordance with AHRI365 standard. COIL(S) Coil shall be air cooled with integral subcooling circuit, constructed of seamless copper tubes 3/8" OD mechanically bonded to wavy Aluminium (Copper) fins with maximum 14 FPI (1.8mm) spacing. Coil shall be tested against leakage by pressurizing air at 450 psig (30 kpa) in coil, under water, cleaned and dehydrated at the factory. COMPRESSOR(S) Compressor shall be of high energy efficiency ratio, fully accessible, semi hermetic reciprocating type equipped with crankcase heater, oil pump, refrigerant gas cooled electric motor, preset internal relief valve, inherent thermistor motor protection, suction and discharge service valves, oil sight glass and shall be mounted on spring anti vibration mounts to minimize vibration transmissions. Compressors shall conform to EN standards. CONDENSER FAN(S) & MOTOR(S) The machine shall be furnished with direct driven propeller type discharging air upward condenser fans. Fans shall be constructed of corrosion resistant blades such as heavy gauge aluminum. The fan and drive shall be held in proper alignment. Fan assemblies shall be provided with heavy gauge, rust resistant steel wire fan guard. All condenser fans shall be individually, statically, and dynamically balanced for vibration free operation. REFRIGERANT PIPING The refrigerant circuit piping shall be fabricated from ACR grade copper piping, with 1, 2, 3, or 4 refrigeration circuits.the piping connections shall be terminated with sealed & soldered copper pipe ends,which give much simplicity & ease to the installation. CASING Unit casing shall be made of zinc coated galvanized steel sheets conforming to JISG3302 and ASTM A653 which shall be phosphatized and then electrostatically dry powder coated of approx.60 microns to provide an extremely tough, scratch resistance, excellent anticorrosive protection that can pass 00 hrs in 5% salt spray testing at 95 F (35 C) and 95% relative humidity as per ASTM B117. Unit casing shall be provided with access panels for easy service and maintenance of all units parts. CONTROL PANEL The unit mounted control panel enclosure shall be fabricated out of heavy gauge sheet steel in phosphatized powder coated baked finish. The enclosure shall conform to IP54 as per guidelines in IEC 529. A hinged access door and keyfastener shall be provided for easy access and security. The panel shall be factory wired in accordance with NEC 430 & 440, labeled, tagged and features 220V / 240V controls and shall include the following as minimum. All compressors shall be with DOL/part winding starting. Individual compressor and condenser fan motor contactors. Motor protector circuit breaker for condenser fan motors. Control circuit breaker. Unit on/off switch. Microprocessor control boards. Control Relays. Power and control terminal blocks. Motors shall be Totally Enclosed Air Over (TEAO), 6 poles, with class F insulation, minimum IP55 protection and factory wired to unit control panel. 34

35 GUIDE SPECIFICATIONS MICROPROCESSOR CONTROLLER Condensing units shall be equipped with a full function microprocessor based controller as a standard feature. The controller shall be factory programmed for the control of AHU fan motor, compressors and condenser fans. The controller shall come with a built in keypad and display for simple but meaningful man machine interface. This controller shall provide complete operational control for the unit and shall have builtin auto diagnostic capability that can signal normal operation or alarm conditions as well as shutting down the unit or system if necessary. The controller shall come with a loose supplied sleek and elegant design room unit for installing in the conditioned space. Communication between unit controller and room unit shall be through two wire interface. The communication cable shall be 2 core, twisted pair, unscreened with stranded conductors. Maximum distance between room unit and controller shall be 700 meters. The room unit shall have a built in sensor for measuring the room temperature. It shall transmit room temperature, set point, unit operating mode, operating schedule etc. to the unit controller. Control of the compressors shall be based on room temperature and the set point, as standard. Control based on duct temperature shall be available if required. The Main Features of the controller shall be as follows: Built in LCD display with back light. Built in keypad. Battery backed up built in real time clock. Multiple authorization level to provide tight security for the control system. Capacity control based on room temperature or return air temperature. Alarm history. A sleek & elegant design room unit. DISPLAY INFORMATION Condensing units shall offer an LCD display which will allow the operator to access different parameters of the unit. Operator shall be able to view and change the unit parameters. The display information shall include: Status. Outputs. Inputs. Alarms. Set points. Password. The intelligent microprocessor based controller shall monitor all the safeties related to the unit and makes the necessary protections, by shutting down the entire unit or the effected circuit. The protections shall include: Low suction pressure. High discharge pressure. Low oil pressure. High compressor motor temperature. Compressor short cycling. Volt free contacts for run status, common fault status, auto mode status and provision for remote on/off shall be available as option. In addition, the unit microprocessor shall be able to support the major BMS protocols such as BACnet, Modbus & LON as option. 35

36 SKM Air Cooled Condensing Units HEAD OFFICE P.O Box: 6004 Sharjah, United Arab Emirates Tel: Fax: sales@skmaircon.com info@skmaircon.com Spare Parts Division spareparts.skm@skmaircon.com Service Centre aftersales.skm@skmaircon.com REGIONAL OFFICES United Arab Emirates Saudi Arabia Abu Dhabi (Production Facility) P.O Box: Tel: Fax: abudhabisales.skm@skmaircon.com Dubai P.O Box: Tel: Fax: dubaisales.skm@skmaircon.com SKM Air Conditioning Factory Eastern province AD Dammam 2nd industrial city Abqiq main road Hail Street Tel: / 4 / 5 Fax: / saudifactory.skm@skmaircon.com Kuwait Algeria Dasman Aissat Idir ( EXENMA) City Bldg1, Flat 2, Dar El Beida Algiers Tel: Fax: algeriasales.skm@skmaircon.com P.O Box: 1215PC Tel: Fax: kuwaitsales.skm@skmaircon.com For SKM Distributors visit: 068/2015 Supersedes Bulletin # 068/2014A /2015 Supersedes Bulletin # 068/2014A 058/2015 Supersedes Bulletin # 058/2014