ACUS-Series Air Cooled Condensing Units

Transcription

1 Series R & R07C R/R07C Series Air Cooled Condensing Units Range 5 TR to 07 TR (7 k to 375 k) facebook.com/skmaircon Sharjah Economic Excellence Award winner

2 Series R & R07C Contents Introduction... Legend... Nomenclature... General Features... 3 Component Features... 3 Control Panel... Optional Features... 5 Microprocessor Controller...5 Engineering Specification Capacity Ratings... 8 Capacity Control Steps... 9 Selection Procedure... 9 Field Connections...0 Field iring Requirement Schematic..0 Typical iring Diagram... Electrical Data... Dimensional Data Loading Points... 8 Location & Space Requirements... 9 Typical Refrigerant Piping Recommended Line Sizes Guide Specification... 3 Introduction SKM 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 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 k... Kilowatts... kilogram... Pounds weight ( British units ) L/S... Liters per second MBh... x 000 Ph... Phase Pa... Pascals PD... Pressure Drop PI... Power Input RPM...Revolutions per Minute TR... Tons of Refrigeration = MBh V... Volt The Air Cooled Condensing unit are ideal for warehouses, large halls, schools, mosques, or wherever the requirement calls for a heavy duty unit with a scroll hermetic compressor. series Air cooled condensing unit ( Hermetic Scroll ) are available in 3 models covering nominal capacity ranges from 5 TR 07 TR (7 k to 375 k) in 50Hz and 60Hz. Air Cooled Condensing unit are rated in accordance with AHRI365. series provide efficient operation, wide range of design flexibility coupled with packaged concept requiring least onsite work. Nomenclature Air Cooled Condensing Unit Scroll Hermetic Compressor Power Supply 5 : 50Hz Frequency 6 : 60Hz No. of Refrigerant Circuits Nominal Capacity (TR) ACU S C Y Power Supply Code Y: 380V5V/3Ph/50Hz P: 0V/3Ph/50Hz R: 380V/3Ph/60Hz E: 60V/3Ph/60Hz T: 0V/3Ph/60Hz C: For R07C, Omitted if R 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. 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...e cool it

3 Series R & R07C General Features The complete condensing unit provides an extremely rugged, heavy duty, longlife and energy efficient that will provide higher efficiency over a long and extended life. hat makes series the pride of SKM products is the use of : High efficiency totally sealed hermetic scroll compressor. 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 5 Electrical panel. Factory installed, advanced and user friendly microprocessor based control system. Interface capability with major BMS protocols (option). The SKM series air cooled condensing units are durable, dependable, strong, reliable, versatile, quiet and energy efficient. herever a heavy duty condensing unit is required, the series should be an automatic choice. Parallel Operation A parallel compressors installation, with common suction line and common discharge line, give reduced operating cost through greater control of capacity and power consumption. This is achieved by staggering compressor switchon sequences that allow the parallel system to match its power with the capacity needed. By switchingoff individual compressor from parallel installation, while other compressor is operating 00%, the improved part load efficiency can be achieved. The specially developed and adopted oil equalization system ensures correct compressors operation, oil balancing between compressors and reliability. Condensers Condenser coils are manufactured of seamless copper tubes mechanically bonded to aluminum fins to ensure optimum heat transfer. Component Features Compressor Compressors used in condensing unit series are hermetically sealed, compact scroll with the following features: High Efficiency. Quite operation, Low Sound levels. Compact and light. Limited wear. 70% fewer moving parts than comparably sized reciprocating compressors Unique ability to handle liquid refrigerant. Suction gas motor cooling. Centrifugal oil pumps with filter and magnet. Brazed fittings or Rotalock as options. Two refrigerant circuits on larger units provides efficient part load. Condenser Coil All coils are tested against leakage by air pressure of 50 psig (300 kpa) under water. All standard coils are 3 or rows/ 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. 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 series, all models, are restricted to a FPI (.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 condensing units perform efficiently and durably. 3

4 Series R & R07C Condenser Fans 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 Designed for ease of handling and low cost to install. The Air cooled condensing Units are factory assembled and mounted on a rigid base. The unit casing used in condensing units is made of zinc coated galvanized steel sheets conforming to JISG330 and ASTM A653 which is phosphatized then baked after an electrostatic powder coat of approximately 60 microns. This finish and coating pass a 000 hours in 5 % salt spray testing at 95 F (35 C) and 95% relative humidity as per ASTM B7. The entire assembly comes complete with lifting holes on the base frame for rigging and installation. Acess panels are provided for easy service and maintainance Options available include hot dipped galvanized base frame and structural members aluminium/stainless steel panels are available, on request, as options. Refrigerant Charge Condensing units are shipped with nitrogen holding charge only. Piping connections Condenser Fan Motor 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. Refrigerant Pipe work SKM 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). hen 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. Installation of solenoid valve in the liquid line is recommended by SKM for proper operation of the unit. Electrical 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 IP5 as per guidelines in IEC 59. A hinged access door and keyfastener is provided for easy access and security. The panel is factory wired in accordance with NEC 30 & 0, labelled, tagged and features 0V / 0V controls. All compressors are with DOL starting. Individual compressor & condenser fan motor contactors. Motor protector circuit breaker for condenser fan motors. Voltage monitoring module for protection against under voltage, over voltage, phase loss, phase reversal and phase unbalance of the incoming voltage. Control circuit breaker. Control circuit on/off switch. Microprocessor control boards. Control Relays. Power and control terminal blocks.

5 Series R & R07C Microprocessor Controller Microprocessor Controller All 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. 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 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: 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 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 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 Room Unit 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 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 frame with painted finish for condensers. 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 pressure indication of each refrigerant circuit. Gauges are mounted outside the Control Panel Pressure Relief Valve To protect the unit from being overpressurized. (PRV) 5

6 Series R & R07C Rotalock Valves on compressors For additional facilitation of maintenance of unit. (RVC) (PGF) Condenser Fan with polyglycoat coating To provide protection against corrosion for condenser fans. Marine Paint (MP) To provide increased corrosion resistance coastal environments and offshore locations. Condenser Fan motors with anticondensation heaters builtin (CFMA) here application so requires. Isolated Condenser Fan Motor (CMS) For elimination of extraneous noise and vibrations from condenser fan motor, the motors are individually isolated from the frame. Hot Gas Bypass System (GBP) ith solenoid valve to enable operation of a large sized unit at low loads, like during low ambients due to application requirements. (Highly recommended for 00% fresh air application). 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. (VSS) 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. Pump Down Facility (PD) The compressor will switch off each time with a Pump Down Cycle in order to prevent Liquid refrigerant migration to the compressor during off Cycle periods. ith this option, each circuit will be provided with an additional discharge check valve (if required) to prevent Refrigerant Migration from High side to Low side when the compressor is off. IP55 Control Panel (ICP) Control Panel for special applications to meet IP55 requirements. Low Ambient Operation Kit (LAO) For unit operation down to lower than normal gulf ambient. Please specify during the time of order. Main Isolator (ithout door interlock) For main power isolation. (consult SKM) 6 (ISO) Control Transformer (CXT) This option is necessary and available for models rated for 0V/3PH/50Hz or 60V/3PH/60Hz or power supplies without neutral. hen ordering for these voltages, this option must be ordered. Voltage Monitoring Module as per DEA (DVM) Under voltage relay as per DEA regulations. This option is available for Dubai, UAE only. 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. 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. UL 995 ( ULLISTED) Unit construction are certified and in compliance of UL 995 safety standards. Consult SKM for availability of selected models. 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 ithout 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(s) (CXFV) To fully Isolate refrigerant filter drier, additional shutoff valve (s) can be incorporated in the liquid line. Must be ordered, if required, with CRSP option. 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.

7 Series R & R07C ENGINEERING SPECIFICATIONS 50 Hz Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Quantity Compressor US Gal Oil Charge per Circuit (A / B) Liter Condenser Coil ft² Face Area m² Code / Quantity Condenser Fan cfm Air Flow Rate l/s Hermetic Scroll Compressor / / Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Propeller direct drive 960 RPM 68/ 73/ 68/ 68/ 68/ 68/ Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Quantity k 0.37/ 0.75/ 0.37/ 0.37/ 0.37/ 0.37/ Refrigerant (R ) Operating Charge Per Circuit Refrigerant (R 07C) Operating Charge Per Circuit Number of Refrigerant Circuits / / /6.9 3./ Unit Operating eight Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Compressor Condenser Coil Condenser Fan Condenser Motor Refrigerant (R ) Operating Charge Quantity Code / Qty. Size / Qty. Per Circuit Refrigerant (R 07C) Operating Charge Per Circuit Number of Refrigerant Circuits Unit Operating eight Oil Charge per Circuit (A / B) Face Area Air Flow Rate US Gal Liter ft² m² cfm l/s k Hermetic Scroll Compressor 0.7/ / / / / / /.77.5/.5 3.5/ / / /3.5 Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Propeller direct drive 960 RPM 73/ 73/ 83/ 83/ 83/3 83/ ). Cooling capacity at 95 F (35 C) ambient temperature according to AHRI365. ). Cooling capacity at Gulf conditions : 5 F (6. C) condenser entering air temperature & 5 F (7. C) SST. 3). Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. ). Condensing units are shipped with nitrogen holding charge only. 0.75/ 9.5/9.5.3/.3 9./9../. 0.75/ 9.9/9.9.5/.5 9.5/9.5.3/ Totally enclosed, air over Class F insulation, 6pole, IP55.5/ 9.9/9.9.5/.5 9.5/9.5.3/ /.3/.3 6.5/ /3.5 6./ /3.3/.3 6.5/ / /3 6.7/ / /5.9 6./6. 7./ Table 7

8 Series R & R07C ENGINEERING SPECIFICATIONS 50 Hz Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Quantity Compressor US Gal Oil Charge per Circuit (A / B) Liter Condenser Coil ft² Face Area m² Code / Quantity Condenser Fan cfm Air Flow Rate l/s Condenser Motor Size / Quantity k Refrigerant (R ) Operating Charge Per Circuit Refrigerant (R 07C) Operating Charge Per Circuit Number of Refrigerant Circuits Unit Operating eight Hermetic Scroll Compressor.3/0.86.3/.3.8/.3.8/.8.7/.7.67/3.5.67/ / / /6.5 Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Propeller direct drive 960 RPM 83/3 89/3 83/ 89/ Totally enclosed, air over Class F insulation, 6pole, IP55.5/3.5/3.5/.5/ 0.9/ /0.9.5/.5 6.9/ / /9.5./../. 0./0. 0./0..9/.9 5.5/5.5 9./9. 9./9. 0./0..6/ / / 35./ / /33. 5./ /.7 6.5/ / / 37.7/ / / / Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Hermetic Scroll Compressor Quantity Compressor US Gal.09/.09.6/ / / / /3.6 Oil Charge per Circuit (A / B) Liter 7.9/ /9.3.8/9.3.8/.8 3.6/.8 3.6/3.6 Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Qty. 89/ 89/ 83/8 83/8 83/8 83/8 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. k.5/.5/.5/8.5/8.5/8.5/8 Refrigerant (R ) Operating Charge Per Circuit Refrigerant (R 07C) Operating Charge Per Circuit Number of Refrigerant Circuits 5.8/ / /50..7/ / /3. 65./ / / / /53../. 55.8/ / /53../. 69.9/ / / /. 70./ / / /30. Unit Operating eight ). Cooling capacity at 95 F (35 C) ambient temperature according to AHRI365. ). Cooling capacity at Gulf conditions : 5 F (6. C) condenser entering air temperature & 5 F (7. C) SST. 3). Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. ). Condensing units are shipped with nitrogen holding charge only. Table ends 8

9 Series R & R07C ENGINEERING SPECIFICATIONS 60 Hz Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Compressor Quantity Oil Charge per Circuit (A / B) Condenser Coil Face Area Condenser Fan Air Flow Rate Condenser Motor Size / Quantity Refrigerant (R ) Operating Charge Per Circuit Refrigerant (R 07C) Operating Charge US Gal Liter ft² m² Code / Quantity 68/ 73/ 68/ 68/ 68/ 68/ cfm l/s k Hermetic Scroll Compressor / / Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Propeller direct drive 50 RPM /./ / Totally enclosed, air over Class F insulation, 6pole, IP / 0.55/.0 7.8/ / /6.9 Per Circuit Number of Refrigerant Circuits / Unit Operating eight / Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Compressor Condenser Coil Condenser Fan Quantity Face Area Code / Qty. Air Flow Rate Condenser Motor Size / Qty. Refrigerant (R ) Operating Charge Per Circuit Refrigerant (R 07C) Operating Charge Per Circuit Number of Refrigerant Circuits Unit Operating eight Oil Charge per Circuit (A / B) US Gal Liter ft² m² cfm l/s k Hermetic Scroll Compressor 0.7/ / / / / / /.77.5/.5 3.5/ / / /3.5 Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Propeller direct drive 50 RPM 73/ 73/ 83/ 83/ 83/3 83/ Totally enclosed, air over Class F insulation, 6pole, IP55./././././3./3 9.5/ / /9.9.3/.3.3/.3 6.7/6.7.3/.3.5/.5.5/.5 6.5/ / /7.6 9./9. 9.5/ / / / /5.9./..3/.3.3/.3 6./6. 6./6. 7./ ). Cooling capacity at 95 F (35 C) ambient temperature according to AHRI365. ). Cooling capacity at Gulf conditions : 5 F (6. C) condenser entering air temperature & 5 F (7. C) SST. 3). Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. ). Condensing units are shipped with nitrogen holding charge only. Table 9

10 Series R & R07C ENGINEERING SPECIFICATIONS 60 Hz Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Compressor Quantity Oil Charge per Circuit (A / B) Condenser Coil Face Area Condenser Fan Air Flow Rate Condenser Motor Size / Quantity Refrigerant (R ) Operating Charge Per Circuit Refrigerant (R 07C) Operating Charge Per Circuit Number of Refrigerant Circuits Unit Operating eight US Gal Liter ft² m² Code / Quantity cfm l/s k Hermetic Scroll Compressor.3/0.86.3/.3.8/.3.8/.8.7/.7.67/3.5.67/ / / /6.5 Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Propeller direct drive 50 RPM 83/3 89/3 83/ 89/ 89/ Totally enclosed, air over Class F insulation, 6pole, IP55./3./3./././ 0.9/ /0.9.5/.5 6.9/ / / /9.5./../. 5.9/5.9 0./0. 0./0..9/.9 5.5/ /33. 9./9. 9./9. 0./0..6/.6 5./ /.7 6.5/ / / 37.7/ / / / Cooling Capacity () (R) Cooling Capacity () (R) Cooling Capacity () (R07C) Cooling Capacity () (R07C) Hermetic Scroll Compressor Quantity Compressor US Gal.09/.09.6/ / / / /3.6 Oil Charge per Circuit (A / B) Liter 7.9/ /9.3.8/9.3.8/.8 3.6/.8 3.6/3.6 Air cooled 3 or rows FPI (.8mm) fin spacing HIXCu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 50 RPM Code / Qty. 89/ 89/ 83/8 83/8 83/8 83/8 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. k./././8./8./8./8 Refrigerant (R ) Operating Charge Per Circuit Refrigerant (R 07C) Operating Charge Per Circuit Number of Refrigerant Circuits 5.8/ / /50..7/ / /3. 65./ / / / /53../. 55.8/ / /53../. 69.9/ / / /. 70./ / / /30. Unit Operating eight ). Cooling capacity at 95 F (35 C) ambient temperature according to AHRI365. ). Cooling capacity at Gulf conditions : 5 F (6. C) condenser entering air temperature & 5 F (7. C) SST. 3). Operating charge is approximate for condensing unit only and does not include refrigerant lines and evaporator coil. ). Condensing units are shipped with nitrogen holding charge only. Table ends 0

11 Series R & R07C CAPACITY RATINGS 50 Hz (R) Notes : SST 95 F (35 C) 05 F (0.6 C) 5 F (6. C) 5 F (5.7 C) Total Capacity Table 3 Computer Print outs for matched ratings with SKM Air Handling Units are available. PI* Total Capacity Condenser Entering Air Temperature F C MBh k k MBh k k MBh k k MBh k k PI* Total Capacity PI* Total Capacity * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages () should be referred for the same. PI*

12 Series R & R07C CAPACITY RATINGS 50 Hz (R) Notes : SST 95 F (35 C) 05 F (0.6 C) 5 F (6. C) 5 F (5.7 C) Total Capacity PI* Total Capacity Condenser Entering Air Temperature F C MBh k k MBh k k MBh k k MBh k k PI* Total Capacity PI* Total Capacity PI* Table 3 ends * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages () should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available.

13 Series R & R07C CAPACITY RATINGS 60 Hz (R) Notes : SST 95 F (35 C) 05 F (0.6 C) Condenser Entering Air Temperature 5 F (6. C) 5 F (5.7 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity F C MBh k k MBh k k MBh k k MBh k k Table * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages () should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. PI* 3

14 Series R & R07C CAPACITY RATINGS 60 Hz (R) SST 95 F (35 C) 05 F (0.6 C) Condenser Entering Air Temperature 5 F (6. C) 5 F (5.7 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity F C MBh k k MBh k k MBh k k MBh k k Notes : Table ends * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages () should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. PI*

15 Series R & R07C CAPACITY RATINGS 50 Hz (R07C) 5005C 5007C 5008C 5009C 50C 500C 503C 505C 509C 50C Notes : PI* Condenser Entering Air Temperature S ST 95 F (35 C) 05 F (0.6 C) 5 F (6. C) 5 F (5.7 C) Total Capacity Total Capacity PI* Total Capacity PI* Total Capacity F C MBh k k MBh k k MBh k k MBh k k PI* Table 5 * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages () should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 5

16 Series R & R07C CAPACITY RATINGS 50 Hz (R07C) 505C 508C 503C 5039C 505C 509C 505C 5055C 5065C 5075C 5080C 5085C 5090C 5095C Notes : PI* Total Capacity Condenser Entering Air Temperature S ST 95 F (35 C) 05 F (0.6 C) 5 F (6. C) 5 F (5.7 C) Total Capacity F C MBh k k MBh k k MBh k k MBh k k PI* Total Capacity PI* Total Capacity PI* Table 5 ends * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages (() should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 6

17 Series R & R07C CAPACITY RATINGS 60 Hz (R07C) 6006C 6008C 6009C 60C 60C 60C 60C 608C 603C 608C Notes : SST 95 F (35 C) 05 F (0.6 C) Condenser Entering Air Temperature 5 F (6. C) 5 F (5.7 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity F C MBh k k MBh k k MBh k k MBh k k PI* Table 6 * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages () should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 7

18 Series R & R07C CAPACITY RATINGS 60 Hz (R07C) 6030C 603C 600C 606C 6053C 6060C 606C 6065C 6080C 6090C 6095C 600C 605C 60C Notes : SST 95 F (35 C) 05 F (0.6 C) Condenser Entering Air Temperature Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity F C MBh k k MBh k k MBh k k MBh k k * Power input mentioned in this page should not be used for cable or fuse selection. MCA and MFA values given in the electrical data pages () should be referred for the same. Computer Print outs for matched ratings with SKM Air Handling Units are available. 5 F (6. C) 5 F (5.7 C) PI* Table 6 ends 8

19 Series R & R07C Capacity Control Steps Selection Procedure The Standard Capacity Control Steps are shown below. Standard Number of steps Table 7 Example The following information should be determined:. Required total capacity = 5 MBh (30. k). Saturated suction temperature = 50 F (0 C) 3. Condenser entering air temperature = 5 F (6 C). Power Supply (V/Ph/Hz) = 380/3/50 5. Refrigerant R07C. Enter capacity ratings from Table 5 at 5 F (6 C) condenser entering air temperature and select model 505 having a cooling capacity of 9 MBh (3.6 k) at 50 F (0 C) saturated suction temperature, compressor motor power input is 5. k. 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 8). 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 8 9

20 Series R & R07C Field Connections 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 series. Every 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 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 series is then ready to provide cooling, on demand. Field iring Requirement Schematic L L L3 N 3 PHASE, 3 IRE SYSTEM 0V/3PH/50Hz CIRCUIT BREAKER 0V/3PH/60Hz OR FUSED 60V/3PH/60Hz DISCONNECT SITCH (NOT BY SKM) ** L N L L L3 N CIRCUIT BREAKER OR FUSED DISCONNECT SITCH (NOT BY SKM) L L L3 N L L GROUND E 3 PHASE, IRE SYSTEM 3805V/3PH/50HZ 380V/3PH/60HZ EFM STARTER INTERLOCK TO AHU AHU STARTER BOX (BY OTHERS) 3 PHASE, IRE SYSTEM 3805V/3PH/50HZ 380V/3PH/60HZ CUSTOMER SUPPLIED AND INSTALLED FIELD ACCESSORY (CONTACTOR, OVERLOAD RELAY & ON/OFF CONTROL etc.) FAN INTERLOCK FROM AHU DOL/STAR DELTA ROOM UNIT (LOOSE SUPPLY) U V M 3 ~ + CE+ CE E AIR HANDLING UNIT SERIES CONTROL PANEL REFER ACTUAL IRING DIAGRAM FURNISHED ITH THE UNIT FOR EXACT IDENTIFICATION OF IRE NUMBERS. CORE UNSCREENED TISTED PAIR CABLE AS PER KNX SPECIFICATION (BY OTHERS) LINE VOLTAGE FIELD IRING LO VOLTAGE FIELD IRING ** SERIES UNITS RATED FOR 0V/3PH/50HZ, 60V/3PH/60HZ, OR POER SUPPLIES ITH OUT NEUTRAL REQUIRE SEPARATE SOURCE OF CONTROL POER SUPPLY THRU FIELD SUPPLIED & INSTALLED 5A/0V FUSED CONTROL DISCONNECT SITCH OR ORDER ITH FACTORY BUILT IN OPTION ' CXT '. 0

21 Series R & R07C Typical iring Diagram MPCB * * PROVIDE OVERCURRENT, EARTH FAULT PROTECTION,SHORT CIRCUITAND DISCONNECT MEANS AS REQUIREDBYLOCAL & NATIONAL ELECTRICCODE. VOLT FREE CONTACT TO MATCHING AHU FOR CR5 EFMSTARTER INTERLOCK T9 Q Q Q T0 Q Q Q Q33 Q3 Q3 Q T Q53 Q5 Q6 Q73 Q7 Q8 T X M X 5V= V= X3 M X T3 X5 M X6 5V= V= X7 M TFR E MICROPROCESSSOR CONTROLLER 0~ 0V V COMP. LSV COMP. LSV CFM CFM CFM3 CFM ~ T8 _ G0 T B M B B3 M DISC. PRESSURE * * L L L3 N N L MCB MCB POERSUPPLY MPCB I> I> MPCB MPCB3 I> I> I> I> I> I> I> C3 C C5 CFM CFM CFM3 G G L CR C CR3 C CR C3 C C5 C6 L I CR _ ~ RS85 I PB C C CR3 CR DISC. PRESSURE LPS LPS EFM HPS HPS T C D0 D0 T3 DL DN DL TIP X8 T D M D T5 DU DG DU T6 A+ B REF INFO ESC THI T7 CE+ CE I> I> I> C6 CFM CS CR6 COREUNSCREENED TISTED PAIRCABLE AS PER KNXSPECIFICATON (BY OTHERS) CR5 ROOM UNIT (LOOSE SUPPLY) + OK LSV LSV RUN/STOP FANINTERLOCK CCH CCH FANINTERLOCK (BY OTHERS) C C MPM * L MPM * L L 3 T T M M S S CM T T M M S S CM CR CR F A VMM B C NC Com NO VMM CR6 L3 * * * NOTE: Typical wiringdiagramgivenhereisforunitswith380~5/3/50or 380/3/60, wirepower supplies. L * iringdiagramsfor 0/3/50, 0/3/60or60/3/60 power supplies areavailableonrequest. For 0/3/50or60/3/60orpowersupplieswithoutneutral, CXToption is amust. MPMModule is not availablein some small compressors. C TFR CS CCH MCB CFM CM COMPRESSORMOTOR CR CONTROL RELAY LPS HPS TRANSFORMER CONTROL SITCH CONTACTOR CRANK CASE HEATER MINIATURECIRCUITBREAKER CONDENSERFANMOTOR LO PRESSURESITCH HIGH PRESSURESITCH L E GEN D VMM VOLTAGEMONITORINGMODULE MOTORPROTECTORMODULE MPM MPCB OL LSV EFM MOTORPROTECTORCIRCUT BREAKER OVERLOADRELAY LIQUIDLINESOLENOIDVALVE EVAPORATORFANMOTOR FIELD IRING

22 ELECTRICAL DATA SKM Air Cooled Condensing Units Series R & R07C Unit Characteristic Compressor POER SUPPLY 3805V/3PH/50Hz Condenser Fan Motor MFA MCA ICF QTY RLA LRA QTY FLA LRA POER SUPPLY 0V/3PH/50Hz Table 9 MFA Unit Characteristic MCA Compressor Condenser Fan Motor ICF QTY RLA LRA QTY FLA LRA Table 0

23 Series R & R07C ELECTRICAL DATA POER SUPPLY 380V/3PH/60Hz Unit Characteristic Compressor Condenser Fan Motor MFA MCA ICF QTY RLA LRA QTY FLA LRA POER SUPPLY 60V/3PH/60Hz Table Unit Characteristic Compressor Condenser Fan Motor MFA MCA ICF QTY RLA LRA QTY FLA LRA Table 3

24 Series R & R07C ELECTRICAL DATA MFA Unit Characteristic MCA Compressor POER SUPPLY 0V/3PH/60Hz Condenser Fan Motor ICF QTY RLA LRA QTY FLA LRA Legend Table 3 MFA Maximum Fuse Amps (for fuse/circuit breaker sizing), complies with NEC Article 0 & 305. MCA Minimum Circuit Amps.(for wire sizing), complies with NEC article 033. ICF Maximum Instantaneous Current Flow. DOL Direct OnLine Start. PS Part inding Start. RLA Rated Load Amps. (at worst operating condition). LRA Locked Rotor Amps. FLA Full Load Amps. Note : Voltage imbalance not to exceed ± % of the rated voltage.

25 Series R & R07C Dimensional Data s: 5005, 5007 & 6006, [5] 6 [5] A A A3 A MODEL DIMENSIONS L 3 [86] 38 [965] 5 [3] FOR LINE SIZES REFER TO PAGE NO: (333) ALL DIMENSIONS ARE IN INCHES [mm] 56 [] LEGEND CONDENSER FAN CONDENSER COIL 3 CONTROL PANEL COMPRESSOR ACCESS L [3] SUCTIONØ LIQUIDØ FILTERED VENTILATION ON BOTH SIDES 3.9 [00] 6.3 [5] DETACHABLE PLATE FOR CABLE ENTRY RIGGING HOLES Ø.79 [0] x Nos. ACCESS [0] 8 [03] 7 [78] s: 5008, 5009, 50 & 6009, 60, 60 s 5008, 5009, 50 & 6009, 60, 60 0 [5] A3 0 [5] LEGEND 3 CONDENSER FAN CONDENSER COIL CONTROL PANEL COMPRESSOR CERTIFIED DRAINGS ARE AVAILABLE ON REQUEST FOR LINE SIZES REFER TO PAGE NO: (333) ALL DIMENSIONS ARE IN INCHES [mm] A A A 5 [3] 3 68 [77] 5.65 [3] FILTERED VENTILATION ON BOTH SIDES DETACHABLE PLATE FOR CABLE ENTRY SUC.Ø LIQ.Ø [305] 3.9 [00] 7 [78] 8 [03] ACCESS RIGGING HOLES Ø0.79[0] Nos. 5

26 Series R & R07C Dimensional Data s: 500, 503, 505, 509, 50 & 60, 60, 608, 603, s 500, 503, 505, 509, 50 & L [73] DIMENSIONS 60, 60, 608, 603, 608 A C 68 DIMENSIONS [77] L [5] A[03] C CERTIFIED DRAINGS ARE AVAILABLE ON REQUEST [3] [930] [77] [5] [5] [5] [03] CERTIFIED DRAINGS ARE AVAILABLE ON REQUEST 0 LEGEND [5] 0 CONDENSER LEGEND FAN [5] CONDENSER COIL CONDENSER FAN 3 CONTROL PANEL 0 CONDENSER COIL [5] COMPRESSOR 3 CONTROL PANEL 0 [5] COMPRESSOR [73] [73] [930] [930] [305] [5] [5] [73] [73] [33] [930] [305] [305] [5] [73] [73] [33] [33] [305] [305] [5] FOR LINE SIZES 608 REFER [73] TO PAGE [33] N [305] ALL DIMENSIONS FOR LINEARE SIZESIN REFER INCHES TO[mm] PAGE N ALL DIMENSIONS ARE IN INCHES[mm] L 3 L 3 0 [5] 0 [5] A A A A A3 A3 A A 0 [5] 0 [5] FILTERED VENTILATION FILTERED ON BOTH SIDES VENTILATION ON BOTH SIDES DETACHABLE PLATE FOR CABLEDETACHABLE ENTRY PLATE FOR CABLE ENTRY 3.9 [00] 5.65 [3] 3.9 [00] 5.65 [3] A SUC.Ø# SUC.Ø# LIQ.Ø# LIQ.Ø# A 7 [78] 7 [78] [0] [0] C C ACCESS ACCESS C SUC.Ø# SUC.Ø# LIQ.Ø# LIQ.Ø# RIGGING Ø.79 RIGGING [0] HOLES HOLES x Nos. Ø.79 [0] x Nos. [0] s: 505, 508, 503, 5039 & 6030, 603, 600, 606 s 505 to 5039 & 6030 to [5] 0 [5] A A3 0 0 [5] [5] A A MODEL MODEL 5 [3] MODEL L 80 [03] 76 [930] 76 [930] DIMENSIONS H A 5.65 [337] [305] [50] [50] [305].7 [33] B [305] [305] [305] [03] 7.65 [85].7 [33].7 [33] FOR LINE SIZES REFER TO PAGE NO: (333) ALL DIMENSIONS ARE IN INCHES[mm] 3 3 L L 88 [35] 88 [35] H 6 FILTERED VENTILATION ON BOTH SIDES FILTERED VENTILATION ON BOTH SIDES 3.9 [00] H DETACHABLE PLATE FOR CABLE ENTRY DETACHABLE PLATE FOR CABLE ENTRY 3.9 [00] A A 7 [78] SUC.Ø# LIQ.Ø# 7 [78] [0] [0] 0 [5] 0 [5] ACCESS [0] 0 [5] [0] 0 [5] RIGGING HOLES Ø.79 [0] x Nos. B B SUC.Ø# LIQ.Ø# RIGGING HOLES Ø.79 [0] x Nos.

27 Series R & R07C 0 Dimensional Data [ 5] s 505 to 5055 & 6053 to s: 505, 509, 505, 5055 & 6053, 6060, 6053 [97] 606, [ 5] 3 A A A A 8 [3] A3 A3 A A 0 [5] 0 [5] [75] LEGEND M ODEL DIMENSIONS CONDENSER FAN * 505 H * 606 [75] CONDENSER COIL CONTROL PANEL 6053 * 5055 [97] * 6065 [75] COMPRESSOR FOR LINE SIZES 6060 [75] REFER TO LEGEND PAGE NO: (333) ALL DIMENSIONS ARE IN INCHES CONDENSER [mm] FAN * * 606 [75] CONDENSER COIL * MODEL ITH TAND EM COMPRESSOR 3 CONTROL PANEL * * 6065 [75] COMPRESSOR FORLINESIZES REFERTO PAGE NO: (333) ALL DIMENSIONS AREIN INCHES [mm] * M ODEL DIMENSIONS MODEL ITH TAND EM COMPRESSOR H 88 [35] FILTERED VENTILATION ON BOTH SIDES 3 8 [3] SUC.Ø# 88 [35] SUC.Ø# FILTERED VENTILATION ON BOTH SIDES DETACHABLE PLATE FOR CABLE ENTRY H.9 [5] H LIQ.Ø # SUC.Ø# LIQ.Ø # SUC.Ø# LIQ.Ø# LIQ.Ø# DETACHABLE PLATE FOR CABLE ENTRY RIGGING HOLES Ø.79 [0] Nos. RIGGING HOLES Ø.79 [0] Nos..9 [5] 3.7 [38] 3.7 [38] 8 [03] 8 [03] [0] [0] 0 [5] ACCESS 0 [5] ACCESS 0 [5] 0 [5] [0] 8 [03] 3.7 [38] [0] 8 [03] 3.7 [38] s 5065, 5075 & 6080, 6090 s: 5065, 5075 & 6080, [5] 0 [5] A A 87. [] 87. [] A3 A3 0 [5] 0 [5] CERTIFIED DRAINGS ARE AVAILABLE ONREQUEST CERTIFIED DRAINGS ARE AVAILABLE LEGENDON REQUEST CONDENSER FAN CONDENSER COIL 3 CONTROL PANEL TANDEM COMPRESSOR FOR LINE SIZES REFER TO PAGE N ALL DIMENSIONS ARE IN INCHES [mm] 3 3 A A 07. [7] 07. [7] A A [35] [35] FILTERED VENTILATION ON BOTH ON BOTH SIDES SIDES 00 [50] [50] [80] 0.6 [80] DETACHABLE DETACHABLE PLATE PLATE FOR FOR CABLE ENTRY CABLE ENTRY LIQUID LIQUID Ø xønos. x Nos. SUCTION Ø x Nos. SUCTION Ø x Nos..9 [5].9 [5] RIGGING HOLES STEEL IRE RIGGING Ø 7/8[] HOLES Nos. GUARD STEEL IRE Ø 7/8[] Nos. GUARD 7

28 Series R & R07C Dimensional Data s: 5080 to 5095 & 6095 to 60 s 5080 to 5095 & 6095 to 60 0 [5] A A3 0 [508] A5 A7 0 [5] CERTIFIED DRAINGS ARE AVAILABLE ON REQUEST LEGEND CONDENSER FAN CONDENSER COIL 3 CONTROL PANEL TANDEM COMPRESSOR FOR LINE SIZES REFER TO PAGE NO : (333) ALL DIMENSIONS ARE IN INCHES[mm] A A A6 A8 88 [35] 88.6 [50] 77. [500] 88.6 [50] [75] 95.3 [0] LIQUID Ø x Nos. FILTERED VENTILATION ON BOTH SIDES 9.5 [750] DETACHABLE PLATE FOR CABLE ENTRY 5.9 [50] SUCTION Ø x Nos. RIGGING HOLES Ø7/8 [] Nos. LOADING POINTS 50Hz LOADING POINTS 60Hz LOADING POINTS TOTAL LOADING POINTS TOTAL UNIT UNIT A A A3 A A5 A6 A7 A8 EIGHT A A A3 A A5 A6 A7 A8 EIGHT Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Ib Ib Kg Kg Table Table 5

29 Series R & R07C 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 No.8). Correct selection of types of isolators depends upon application and structure. Location and Space Requirements SINGLE UNIT INSTALLATION A B C 5005, 5007 & 6006, to 50 & 6009 to to5039 & 6030 to Table 6 B B A A B A 505 to 5055 & 6053 to 6065 A A B B B * A A * 5080 to 5095 & 6095 to 60 A A B B 5065, 5075 &6080, 6090 B * SPACING FOR SERVICE AND ACCESS SPACING FOR AIR FLO SPACING FOR BOTH AIR FLO AND SERVICE * A A * B 9

30 Series R & R07C Location and Space Requirements MULTIPLE UNIT INSTALLATION 5005, 5007 & 6006, to 5095 & 6095 to 60 C B B * A B 5008 to 5075 & 6009 to 6090 ABB C B * A C * A * SPACING FOR BOTH AIR FLO AND SERVICE SPACING FOR SERVICE AND ACCESS SPACING FOR AIR FLO 5 3 AIR FLO Typical Refrigeration Piping AHU Legend. Expansion Valve. Sight Glass 3. Solenoid Valve. Filter Drier 5. Shut Off Valve 6. Liquid Line 7. Suction Line 7 6 CONDENSING UNIT () 3 CONDENSING UNIT () AIR FLO AHU Single Circuit Unit Shown. For Dual circuit 7 units, piping of second circuit is similar AIR FLO AHU AIR FLO AHU DOTTED IN CASE OF DOUBLE SUCTION RISER DOTTED IN CASE OF DOUBLE SUCTION RISER L E G E N D L E G E N D EXPANSION VALVE EXPANSION VALVE SIGHT GLASS SIGHT GLASS 3 SOLENOID 3 SOLENOID VALVE VALVE FILTER DRIER FILTER DRIER 5 SHUT OFF VALVE 5 SHUT OFF 6 LIQUID VALVE LINE 7 SUCTION LINE 6 LIQUID LINE 7 SUCTION LINE CONDENSING UNIT () CONDENSING UNIT () 30

31 Series R & R07C 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 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.. Expansion valves should be installed as close to the evaporator as possible, mounted directly to the distributor.. 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 R F (0.55 C) sub cooling must be allowed for each 5.5 ft (.7m) vertical rise in order to avoid flash gas forming due to the weight of the column of liquid refrigerant. SKM Series units are designed with a sub cooling circuit enough to sub cool the liquid F (6.6 C), which gives the liquid maximum 66 ft. (0m) 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 Series, the DX coil selection in a MAH or other air handler from SKM should be based on total capacity. For dual circuit 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 dual circuited 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 Series model. 3

32 Series R & R07C Recommended Refrigerant Line Sizes 50 Hz Circuit Liquid Line Size, inches Circuit 5 ft 50 ft 75 ft 00 ft 5 ft 50 ft 75 ft 00 ft 5 ft 50 ft 75 ft 00 ft 5 ft 50 ft 75 ft 00 ft 5005 / / / 5/8 7/8 /8 /8 / / / / 5/8 7/8 /8 /8 3/ / / 5/8 5/8 /8 /8 3/8 3/ / 5/8 5/8 5/8 /8 3/8 3/8 3/8 500 / / / 5/8 / / / 5/8 7/8 /8 /8 /8 7/8 /8 /8 /8 50 / 5/8 5/8 7/8 /8 3/8 3/8 5/8 503 / / / 5/8 / / / 5/8 7/8 /8 /8 3/8 7/8 /8 /8 3/8 505 / / 5/8 5/8 / / 5/8 5/8 /8 /8 3/8 3/8 /8 /8 3/8 3/8 509 / 5/8 5/8 5/8 / 5/8 5/8 5/8 /8 3/8 3/8 3/8 /8 3/8 3/8 3/8 50 / 5/8 5/8 7/8 / 5/8 5/8 7/8 /8 3/8 3/8 5/8 /8 3/8 3/8 5/ /8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 /8 3/8 3/8 5/8 /8 3/8 3/8 5/ /8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 3/8 3/8 5/8 5/8 3/8 3/8 5/8 5/ /8 7/8 7/8 7/8 5/8 5/8 7/8 7/8 3/8 5/8 5/8 /8 3/8 3/8 5/8 5/ /8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 3/8 5/8 5/8 /8 3/8 5/8 5/8 / /8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 5/8 5/8 /8 /8 3/8 5/8 5/8 / /8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 5/8 5/8 /8 /8 5/8 5/8 /8 / /8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 5/8 /8 /8 /8 5/8 /8 /8 / /8 7/8 7/8 /8 7/8 7/8 7/8 /8 5/8 /8 /8 /8 5/8 /8 /8 / /8 7/8 /8 /8 7/8 7/8 /8 /8 5/8 /8 /8 /8 5/8 /8 /8 / /8 7/8 /8 /8 7/8 7/8 /8 /8 /8 /8 /8 5/8 /8 /8 /8 5/ /8 /8 /8 /8 7/8 7/8 /8 /8 /8 /8 5/8 5/8 /8 /8 /8 5/ /8 /8 /8 /8 7/8 /8 /8 /8 /8 /8 5/8 5/8 /8 /8 5/8 5/ /8 /8 /8 /8 7/8 /8 /8 /8 /8 /8 5/8 5/8 /8 /8 5/8 5/ /8 /8 /8 /8 7/8 /8 /8 /8 /8 /8 5/8 5/8 /8 /8 5/8 5/8 SKM Series Condensing Units are designed for satisfactory operation with single suction line.. Suction Line sizing selection recommendation in Table 7 is based on ºF temperature drop.. 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 7 is based on ºF temperature drop.. Recommended line sizes in Table 7 are for guidance only. For detailed proper piping, consult recognized piping references like ASHRAE Guide and Data Book for assistance. 5. Suction and liquid line sizes are based on equivalent lengths. Circuit Suction Line Size, inches Circuit Table 7 SKM is not responsible for faulty or improper design or sizing of refrigerant lines. The above recommendations do not incorporate necesarry slopes. etc. that may be required on horizontal risers, etc. 3

33 Series R & R07C Recommended Refrigerant Line Sizes 60 Hz Circuit Liquid Line Size, inches Circuit Suction Line Size, inches 5 ft 50 ft 75 ft 00 ft 5 ft 50 ft 75 ft 00 ft 5 ft 50 ft 75 ft 00 ft 5 ft 50 ft 75 ft 00 ft 6006 / / 5/8 5/8 /8 /8 3/8 3/ / / 5/8 5/8 /8 /8 3/8 3/ / 5/8 5/8 5/8 /8 3/8 3/8 3/8 60 / 5/8 5/8 7/8 /8 3/8 3/8 5/8 60 / / 5/8 5/8 / / 5/8 5/8 /8 /8 3/8 3/8 /8 /8 3/8 3/8 60 5/8 5/8 7/8 7/8 3/8 3/8 5/8 5/8 60 / / 5/8 5/8 / / 5/8 5/8 /8 /8 3/8 3/8 /8 /8 3/8 3/8 608 / 5/8 5/8 5/8 / 5/8 5/8 5/8 /8 3/8 3/8 3/8 /8 3/8 3/8 3/8 603 / 5/8 5/8 7/8 / 5/8 5/8 7/8 /8 3/8 3/8 5/8 /8 3/8 3/8 5/ /8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 3/8 3/8 5/8 5/8 3/8 3/8 5/8 5/ /8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 3/8 3/8 5/8 5/8 3/8 3/8 5/8 5/ /8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 3/8 5/8 5/8 /8 3/8 5/8 5/8 / /8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 5/8 5/8 /8 /8 3/8 5/8 5/8 / /8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 5/8 5/8 /8 /8 5/8 5/8 /8 / /8 7/8 7/8 /8 7/8 7/8 7/8 7/8 5/8 /8 /8 /8 5/8 5/8 /8 / /8 7/8 7/8 /8 7/8 7/8 7/8 /8 5/8 /8 /8 /8 5/8 /8 /8 / /8 7/8 7/8 /8 7/8 7/8 7/8 /8 5/8 /8 /8 /8 5/8 /8 /8 / /8 7/8 /8 /8 7/8 7/8 /8 /8 5/8 /8 /8 5/8 5/8 /8 /8 5/ /8 /8 /8 /8 7/8 /8 /8 /8 /8 /8 5/8 5/8 /8 /8 5/8 5/ /8 /8 /8 /8 7/8 /8 /8 /8 /8 /8 5/8 5/8 /8 /8 5/8 5/ /8 /8 /8 /8 7/8 /8 /8 /8 /8 5/8 5/8 5/8 /8 /8 5/8 5/ /8 /8 /8 /8 7/8 /8 /8 /8 /8 5/8 5/8 5/8 /8 5/8 5/8 5/ /8 /8 /8 3/8 7/8 /8 /8 /8 /8 5/8 5/8 5/8 /8 5/8 5/8 5/8 60 7/8 /8 /8 3/8 7/8 /8 /8 3/8 /8 5/8 5/8 5/8 /8 5/8 5/8 5/8 Circuit SKM Series Condensing Units are designed for satisfactory operation with single suction line.. Suction Line sizing selection recommendation in Table 8 is based on ºF temperature drop. Circuit Table 8. 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 8 is based on ºF temperature drop.. Recommended line sizes in Table 8 are for guidance only. For detailed proper piping, consult recognized piping references like ASHRAE Guide and Data Book for assistance. 5. Suction and liquid line sizes are based on equivalent lengths. SKM is not responsible for faulty or improper design or sizing of refrigerant lines. The above recommendations do not incorporate necesarry slopes. etc. that may be required on horizontal risers, etc. 33

34 Series R & R07C 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 R & R07C should be done at site). Unit shall be capable to operate from 50 F (0 C) to 0 F (8.9 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 FPI (.8 mm) spacing. Coil shall be tested against leakage by pressurizing air at 50 psig (300 kpa) in coil, under water, cleaned and dehydrated at the factory. COMPRESSOR(S) Compressor shall be hermetic scroll, refrigerant gas cooled furnished with internal overload protection device, crankcase heater, and shall be mounted on rubber isolators. 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. Motors shall be Totally Enclosed Air Over (TEAO), 6 poles, with class F insulation, minimum IP55 protection and factory wired to unit control panel. REFRIGERANT PIPING The refrigerant circuit piping shall be fabricated from ACR grade copper piping, with or, 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 JISG330 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 000 hrs in 5% salt spray testing at 95 F (35 C) and 95% relative humidity as per ASTM B7. 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 IP5 as per guidelines in IEC 59. A hinged access door and keyfastener shall be provided for easy access and security. The panel shall be factory wired in accordance with NEC 30 & 0, labeled, tagged and features 0V / 0V controls and shall include the following as minimum. All compressors shall be with DOL starting. Individual compressor and condenser fan motor contactors. Motor protector circuit breaker for condenser fan motors. Voltage monitoring module for protection against under voltage, over voltage, phase loss, phase reversal and phase unbalance of the incoming voltage. Control circuit breaker. Control circuit on/off switch. Microprocessor control boards. Control Relays. Power and control terminal blocks. 3

35 Series R & R07C 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 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. 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 Series R & R07C HEAD OFFICE P.O Box: 600 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: 7788 Tel: Fax: abudhabisales.skm@skmaircon.com Dubai P.O Box: 988 Tel: Fax: dubaisales.skm@skmaircon.com SKM Air Conditioning Factory Eastern province AD Dammam nd industrial city Abqiq main road Hail Street Tel: / / 5 Fax: / saudifactory.skm@skmaircon.com Kuwait Algeria Dasman Aissat Idir ( EXENMA) City Bldg, Flat, Dar El Beida Algiers Tel: Fax: algeriasales.skm@skmaircon.com P.O Box: 5PC 563 Tel: Fax: kuwaitsales.skm@skmaircon.com For SKM Distributors visit: /0 A Supersedes # 09/0