R-22. ACUF-Series Air Cooled Condensing Units. SKM Air Cooled Condensing Units ACUF Series - R-22. Range 11 TR to 119 TR (40 kw to 420 kw)

Transcription

1 R22 Series Air Cooled Condensing Units Range 11 TR to 119 TR (40 kw to 420 kw) facebook.com/skmaircon Sharjah Economic Excellence Award winner 1

2 Contents Introduction...2 Legend... 2 Nomenclature... 2 General Features...3 Component Features...3 Optional Features...5 Capacity Control Steps... 7 Selection Procedure...7 Engineering Specifications...8 Capacity Ratings...12 Compressor...16Electrical...17 Legend The following legends are used throughout this manual: AFR... Air Flow Rate PF... ypass Factor C.Cap.. Cooling Capacity CFM... Cubic feet per minute EER... Energy Efficiency Ratio Hz... Hertz in.wg... inches of water gauge kw... Kilowatt Kg... Kilogram lbs... Pounds weight (ritish units) L/s... Liters per second Nomenclature Starting Hookup ACU F Y M Field Wiring Schematic...17 Typical Wiring Diagram...18 Electrical Data...19 Dimensional Data...24 Loading Points...28 Installation & Application Data...27 Location & Space Requirments...30 Typical Refrigeration Piping...32 Recommended Refrigerant Line Sizes...33 Guide Specifications...34 Mh... TUH x 00 PH... Phase Pa... Pascal PD... Pressure Drop PI... Compressor Power Input in kw RPM...Revolutions per Minute RPS... Rated Power Supply TR... Tons of refrigeration = 12 Mh V... Volts FPI... Fins per Inch Introduction SKM Air Cooled Condensing Units have been designed for use on systems with indoor units connected to remote outdoor located Condensing Units. SKM offers Condensing Units that are built in the UAE and are specifically designed to meet the requirements of the Gulf s severe climatic conditions The Air Cooled Condensing unit are ideal for residential buildings, hotels, motels, schools, or wherever the requirement calls for a heavy duty unit with a hermetic reciprocating compressor. Series Air cooled condensing unit (semihermetic reciprocating) are available in 52 models covering nominal capacity ranges from 11 TR 119 TR (40 kw to 420 kw) in 50Hz and 60Hz. The features, as standard, operating range of ambient temperatures from 50 F ( C) to 120 F (48.9 C), a low design ITD (temperature difference between refrigerant condensing temperatures and ambient air temperature), all of which translate into lower operating cost and longer life of the unit. SKM Air Cooled Condensing Units are constructed and rated in accordance with and conforming to AHRI standard 365. SKM provides efficient operation; a wide range of design flexibility coupled with a packaged concept requiring the least amount of onsite work. Air cooled Condensing Unit FSeries (SemiHermetic Reciprocating Compressor) Power Supply 5 : 50Hz Frequency 6 : 60Hz Nominal Capacity (TR) Factory Modification Code Power Supply Code Y: 380V415V/3Ph/50Hz P: 440V/3Ph/50Hz R: 380V/3Ph/60Hz E: 460V/3Ph/60Hz T: 220V/3Ph/60Hz SKM Air Cooled Condensing Units are the specifiers choice for commercial and industrial applications where highly efficient outdoor Condensing Units need to be matched to an indoor central station air handling unit or coil to get maximum performance advantages of a split system with a low 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. 2 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. SKM Air Conditioning LLC You name it...we cool it

3 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. What makes 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 MS protocols (option). The SKM series air cooled condensing units are durable, dependable, strong, reliable, versatile, quiet and energy efficient. Wherever a heavy duty condensing unit is required, the series should be an automatic choice. Component Features Compressor Compressors used in 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 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. Condensers Condenser coils are manufactured of seamless copper tubes mechanically bonded to aluminum fins to ensure optimum heat transfer. All coils are tested against leakage by air pressure of 450 psig (30 kpa) under water. All standard coils are 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 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 condensing unit perform efficiently and durably. 3

4 Condensers Fans Condenser fans are propeller type, aluminium alloy blades, directly driven by electric motors. Motors are Totally Enclosed Air Over (TEAO) six pol 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. Condenser Fan Motor 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 casing used in 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 117. 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. Refrigerant Charge Condensing units are shipped with nitrogen holding charge only. Piping connections 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). 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. 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 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. Piping connections 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. Factory Installed Option Microprocessor ased Control (MCP) A compact and user friendly electronic controller is available as an option for the control of the package units. The controller comes with a built in display, loose supplied room terminal and duct sensor. 4

5 The main features of the controller are as follows: uiltin display with keypad. Room terminal for mounting in the conditioned space. Control of the indoor Fan & compressors. Control of the compressors is based on return duct temperature. Alarm management. uiltin anti recycle time for the compressors. Automatic leadlag for the compressors based on run time (for units with two compressors) Volt free contact for common fault. Remote start/stop provision. Figure 3 The controller displays status of the indoor fan, compressors, duct temperature and active alarms. Alarms can be automatic or manual reset (factory default is auto reset). Set points are configurable from the controller display as well. The loose supplied room terminal also shows the same information as the builtin display. Optional Features series heavy duty packaged air conditioners are available with a multitude of optional features which makes design and selection extremely easy and capable of matching the most stringent of requirements. Alternative Condenser Material Made of copper tubes and alternative fin material and/or protective coating. For Copper Fins, specify (FC). For electrotinned Copper Fins only, specify (CFT). For Copper Finned Coils electrotinned post manufacturing, specify (FCT). For PreCoated aluminum fins, specify (FAP). For Aluminum Fins with Aeris post Coat Protection, specify (FAA). For Copper Fins with Aeris post Coat Protection,specify (FCA) 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 ase (GF) Steel frame and base which are hot dip galvanized after manufacturing process. This is recommended for highly corrosive environments. Pressure Gauges (SDG1) 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) Marine Paint (MP) To provide increased corrosion resistance coastal environments and offshore locations. 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. With this option, each circuit will be provided with an additional discharge check valve to prevent Refrigerant Migration from High side to Low side when the compressor is off. Condenser Fans with polyglycoat coating (PGF) To provide protection against corrosion for condenser fan. Capacity Control Steps (CRS1) To provide additional capacity steps on the units. See Table 6 (Page 17) for optional steps available. Hot Gas ypass System (GP) 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 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) 5

6 Control Transformer (CXT) This option is necessary and available for 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 unit operation in the event of Phase loss, Phase reversal, and Under / Over voltage on the incoming line voltage. 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 16 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. (not required with DOL starting). 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. Lead Lag Switch (LLS) For double circuit units Compressor starting sequence to change manually. Run Hour Meter(s) To monitor operating hours of each compressor. (RHM) Circuit reaker for Compressor (CC) 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. 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. Isolated Condenser Fan Motors (CMS) For elimination of extraneous noise and vibration from condenser fan motor, the motors are individually isolated from the frame. Condenser Fan motors with anticondensation heaters builtin (CFMA) Where application so requires. Ammeter & Phase Selector switch (AMPI) To indicate running AMPS on main incomer of the unit. Voltmeter & Selector Switch For incoming line voltage. Options for Field Installations (VSS) 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) To fully isolate fi lter drier, an additional shutoff valve can be incorporated in the liquid line. Must be ordered, if required, with CRSP option. Cooling Heating Thermostat (Not with Option MCP) (CHTS) Single stage or two stage cooling with single or two stage heating versions are available from SKM. Specify when ordering. Any other requirements to be procured by customer from any control vendor to suit. 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. Ammeter & Phase Selector switch To indicate running AMPS of each compressor. (AMPC) 6

7 Capacity Control Steps Standard & options Capacity Control Steps are shown below. Standard Number of Steps Optional Number of Steps Table 1 Selection Procedure Altitude Correction Factors Example The following information should be determined: 1. Required total capacity = 470 Mh (137.6 kw ) 2. Saturated suction temperature = 40 F (4.4 C) 3. Condenser entering air temperature = 115 F (46 C) 4. Power Supply (V/PH/Hz) = 380/3/50 Enter capacity ratings from Table 7 at 115 F (46 C) condenser entering air temperature and select model 5051 having a cooling capacity of 470 Mh (137.6 kw ) at 40 F (4.4 C) saturated suction temperature, compressor motor power input is 53.7 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 2). The unit ratings are based on sea level. Above sea level apply the following correction factors: Altitude Capacity Power feet meter Multiplier Multiplier Table 2 7

8 ENGINEERING SPECIFICATIONS 50 HZ ENGINEERING SPECIFICATIONS 50 Hz Cooling Capacity Cooling Capacity (1) (2) TUH W TUH W Compressor Quantity Oil Charge(Polyol Ester) US Gal per Crkt (1/2/3/4) Liter SemiHermetic Reciprocating 1450 RPM / / / / / / Air cooled 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Quantity 628/2 723/2 823/2 823/2 823/3 823/3 823/3 Condenser Fan cfm Air Flow Rate l/s Totally enclosed, air over Class F insulation, 6pole, IP55 Condenser Motor Size / Quantity kw 0.37/2 0.75/2 1.5/2 1.5/2 1.5/3 1.5/3 1.5/3 Refrigerant (R 134a) Operating Charge per Circuit lbs /8.8.6/ / (1/2/3/4) (3) kg / / / Number of Refrigerant Circuits lbs Unit Operating Weight kg Cooling Capacity (1) TUH W Cooling Capacity (2) TUH W SemiHermetic Reciprocating 1450 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal 1.19/ / /1.19 5/ per Crkt (1/2/3/4) Liter 4.5/ / / / Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Qty. 823/3 829/3 829/3 823/4 823/4 823/4 829/4 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. kw 1.5/3 1.5/3 1.5/3 1.5/4 1.5/4 1.5/4 1.5/4 Refrigerant (R 134a) Operating Charge per Circuit lbs 18.9/ / / / (1/2/3/4) (3) kg 8.6/ / / / Number of Refrigerant Circuits Unit Operating Weight lbs kg Table 3 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. 8

9 ENGINEERING SPECIFICATIONS 50 HZ ENGINEERING SPECIFICATIONS 50 Hz Cooling Capacity Cooling Capacity (1) (2) TUH W TUH W Compressor Quantity Oil Charge(Polyol Ester) US Gal per Crkt (1/2/3/4) Liter SemiHermetic Reciprocating 1450 RPM / / / / / / / / / / / /4.75 Air cooled 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Quantity 829/4 829/4 829/4 829/4 829/4 829/4 Condenser Fan cfm Air Flow Rate l/s Totally enclosed, air over Class F insulation, 6pole, IP55 Condenser Motor Size / Quantity kw 1.5/4 1.5/4 1.5/4 1.5/4 1.5/4 1.5/4 Refrigerant (R 134a) Operating Charge per Circuit lbs 26.0/ / / / / /59.5 (1/2/3/4) (3) kg 11.8/ / / / /22 27/27 Number of Refrigerant Circuits lbs Unit Operating Weight kg Cooling Capacity (1) TUH W Cooling Capacity (2) TUH W SemiHermetic Reciprocating 1450 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal 1.25/ / / / /1.32 per Crkt (1/2/3/4) Liter 4.75/ /4.75 5/ /4.75 5/4.75 5/5 Air cooled 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Qty. 829/6 829/4 & 823/4 829/6 829/8 829/8 829/8 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. kw 1.5/6 1.5/8 1.5/6 1.5/8 1.5/8 1.5/8 Refrigerant (R 134a) Operating Charge per Circuit lbs 59.5/ / / / / /35.9 (1/2/3/4) (3) kg 27/ / /15 27/ / /16.3 Number of Refrigerant Circuits Unit Operating Weight lbs kg Table 4 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. 9

10 ENGINEERING SPECIFICATIONS 60 HZ ENGINEERING SPECIFICATIONS 50 Hz Cooling Capacity (1) TUH W Cooling Capacity (2) TUH W SemiHermetic Reciprocating 1750 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal / / / per Crkt (1/2/3/4) Liter / / / Air cooled 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Quantity 628/2 723/2 823/2 823/2 823/3 823/3 823/3 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Quantity kw 0.55/2 1.1/2 2.2/2 2.2/2 2.2/3 2.2/3 2.2/3 Refrigerant (R 134a) Operating Charge per Circuit lbs /8.8.6/ / (1/2/3/4) (3) kg / / / Number of Refrigerant Circuits Unit Operating Weight lbs kg Cooling Capacity (1) TUH W Cooling Capacity (2) TUH W SemiHermetic Reciprocating 1750 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal 1.19/ / /1.19 5/ per Crkt (1/2/3/4) Liter 4.5/ / / / Air cooled 2 & 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Qty. 823/3 829/3 829/3 823/4 823/4 823/4 829/4 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. kw 2.2/3 2.2/3 2.2/3 2.2/4 2.2/4 2.2/4 2.2/4 Refrigerant (R 134a) Operating Charge per Circuit lbs 18.9/ / / / (1/2/3/4) (3) kg 8.6/ / / / Number of Refrigerant Circuits Unit Operating Weight lbs kg Table 5 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.

11 ENGINEERING SPECIFICATIONS 60 HZ ENGINEERING SPECIFICATIONS TUH Hz Cooling Capacity (1) W TUH Cooling Capacity (2) W SemiHermetic Reciprocating 1750 RPM Quantity Compressor Oil Charge(Polyol Ester) US Gal 1.25/ / / / / /1.25 per Crkt (1/2/3/4) Liter 4.75/ / / / / /4.75 Air cooled 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Quantity 829/4 829/4 829/4 829/4 829/4 829/4 Condenser Fan cfm Air Flow Rate l/s 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 2.2/4 2.2/4 Refrigerant (R 134a) Operating Charge per Circuit lbs 26.0/ / / / / /59.5 (1/2/3/4) (3) kg 11.8/ / / / /22 27/27 Number of Refrigerant Circuits lbs Unit Operating Weight kg Cooling Capacity (1) TUH W Cooling Capacity (2) TUH W SemiHermetic Reciprocating 1750 RPM Compressor Quantity Oil Charge(Polyol Ester) US Gal 1.25/ / / / /1.32 per Crkt (1/2/3/4) Liter 4.75/ /4.75 5/ /4.75 5/4.75 5/5 Air cooled 3 or 4 rows 14 FPI (1.8 mm) fin spacing Cu tubes Al fins Condenser Coil ft² Face Area m² Propeller direct drive 960 RPM Code / Qty. 829/6 829/4 & 823/4 829/6 829/8 829/8 829/8 Condenser Fan cfm Air Flow Rate l/s Condenser Motor Totally enclosed, air over Class F insulation, 6pole, IP55 Size / Qty. kw 2.2/6 2.2/8 2.2/6 2.2/8 2.2/8 2.2/8 Refrigerant (R 134a) Operating Charge per Circuit lbs 59.5/ / / / / /35.9 (1/2/3/4) (3) kg 27/ / /15 27/ / /16.3 Number of Refrigerant Circuits Unit Operating Weight lbs kg Table 6 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. 11

12 CAPACITY RATINGS 50 HZ Note: Condenser Entering Air Temperature ºF (ºC) SST 95 F (35 C) 5 F (40.6 C) 115 F (46.1 C) 120 F (48.9 C) 125 F (51.7 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity F C Mh kw kw Mh kw kw Mh kw kw Mh kw kw Mh kw kw Shaded Values are at 120 F (49 C) condenser entering air temperature. Computer Print outs for matched ratings with SKM Air Handling Units are available. * 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 (1923) should be referred for the same. PI* Table 7 12

13 CAPACITY RATINGS 50 HZ A A Note: SST Condenser Entering Air Temperature ºF (ºC) 95 F (35 C) 5 F (40.6 C) 115 F (46.1 C) 120 F (48.9 C) 125 F (51.7 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity F C Mh kw kw Mh kw kw Mh kw kw Mh kw kw Mh kw kw Shaded Values are at 120 F (49 C) condenser entering air temperature. Computer Print outs for matched ratings with SKM Air Handling Units are available. * 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 (1923) should be referred for the same. PI* Table 8 13

14 CAPACITY RATINGS 60 HZ Note: Condenser Entering Air Temperature ºF (ºC) SST 95 F (35 C) 5 F (40.6 C) 115 F (46.1 C) 120 F (48.9 C) 125 F (51.7 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* F C Mh kw kw Mh kw kw Mh kw kw Mh kw kw Mh kw kw Table 9 Shaded Values are at 120 F (49 C) condenser entering air temperature. Computer Print outs for matched ratings with SKM Air Handling Units are available. * 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 (1923) should be referred for the same. 14

15 CAPACITY RATINGS 60 HZ A A Note: Condenser Entering Air Temperature ºF (ºC) SST 95 F (35 C) 5 F (40.6 C) 115 F (46.1 C) 120 F (48.9 C) 125 F (51.7 C) Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* Total Capacity PI* F C Mh kw kw Mh kw kw Mh kw kw Mh kw kw Mh kw kw Table Shaded Values are at 120 F (49 C) condenser entering air temperature. Computer Print outs for matched ratings with SKM Air Handling Units are available. * 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 (1923) should be referred for the same. 15

16 Compressor Starting The Condensing Unit are provided, as standard mode of compressor starting as per Table 11. All Air Cooled Condensing Units with standard DOL start compressors as shown, do not, generally, require part winding start. Maximum Instantaneous Current Flow as shown in Tables 1216 (pages 1923), must be used in determining the need for such part winding start. 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 11. 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 DOL PWS DOL PWS DOL PWS DOL PWS PWS DOL PWS PWS PWS ** PWS DOL PWS DOL PWS DOL PWS ** PWS PWS ** NOTE: Table 11 please consult SKM, for ** marked models with 440V/3ph/50Hz power supply. 16

17 Electrical HookUp Every SKM Condensing Unit requires, at most, field intalled fused disconnect switches or circuit breakers, fan interlocks and 24 volt temperature control thermostat. Refer to typical wiring diagram (page 18) for schematic representation of required field electrical hookups for a standard Condensing Unit hooked up with an air handling unit. When option CRS is required, consult SKM for certified Wiring Diagram and Electrical Hookup (see Page 16 for Capacity Control Steps option CRS). All field wiring must be done in accordance with applicable local and national codes. For maximum recommended fuse sizes and minimum circuit amperes for cable sizing, see Tables (pages 1923) of this bulletin. Field Wiring Schematic ** ** SERIES UNITS RATED FOR 440V/3Ph/50Hz AND 460V/3Ph/60Hz (3 WIRE SYSTEM) REQUIRE SEPARATE SOURCE OF CONTROL POWER SUPPLY THRU FIELD SUPPLIED & INSTALLED 15A/220V FUSED CONTROL DISCONNECT SWITCH OR ORDER WITH FACTORY UILT OPTION 'CXT'. 17

18 Typical Wiring Diagram F I> FCS6 C8 Legend : VOLTFREE CONTACTS FOR C4 VMM A C NO Com NC CF4 C4 C2 CS2 MP L N FCS1 FCS4 FCS2 FCS5 FCS3 L OPS2 TDR2 M HPS2 TDR4 C3 LPS2 C4 TR2 CR3 OFH2 USV2 P TDR2 C6 C7 C3 RHM2 C5 TDR4 C4 PWS, USK & RHM MPC4 I> I> C8 CFM4 PO ERSUPPLY MPC3 MPC2 I> I> I> I> I> I> I> I> I> C7 TDR3 C1 TR1 OFH1 PWS USV1 P TDR3 C1 C2 RHM1 C3 PWS, USK & RHM C4 PWS MPC1 C6 CFM3 C5 CFM1 CFM2 L1 ** L2 L3 N N L1 CF1 CF2 C1 VMM C2 CM1 CM2 C1 C3 CF3 CS1 MP L N TDR1 OPS1 L M HPS1 LPS1 CR2 TDR1 C2 Y1 Y2 CCH1 CCH2 TFR E C R G CR1 TH (YOTHERS) CR2 CR3 CONTROL CIRCUIT C2 CR1 LSV INTERLOCK (WITH CRSP OPTION) EFM STARTER INTERLOCK 220~ 240V 24V FANINTERLOCK VFC'NO' FANINTERLOCK VFC'NO' LSV1 LSV2 C Contactor CCH Crank Case Heater CF Control Fuse CFM Condenser Fan Motor CM Compressor Motor CR Control Relay CS Control Switch EFM Evaporator Fan Motor F Power Circuit Fuse FCS Fan Cycliing Switch HPS High Pressure Switch LPS Low Pressure Switch LSV Liquid Line Solenoid Valve USV Unload Start Solenoid Valve MP Motor Protector OFH Oil Failure Heater OFS Oil Failure Switch OL Overload Relay P Pressure Activated Switch TDR Time Delay Relay TFR Transformer TH Thermostat TR Timer Field Wiring & Field Suppliied Devices Additional Wiring for Dual Compressor with 4 condenser fans Optional Features PWS VMM USK RHM Part Winding Start Voltage Monitoring Module Unload Start Kit Run Hour Meter 18

19 ELECTRICAL DATA Power Supply: 380~415V/3PH/50Hz MFA Unit Characteristic MCA ICF Compressor Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA 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 19

20 ELECTRICAL DATA Power Supply: 440V/3PH/50Hz MFA Unit Characteristic MCA ICF Compressor Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA For Details, Please consult SKM For Details, Please consult SKM For Details, Please consult SKM LEGEND: Table 13 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 Power Supply: 380V/3PH/60Hz MFA Unit Characteristic MCA ICF Compressor Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA LEGEND: Table 14 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 Power Supply: 460V/3PH/60Hz MFA Unit Characteristic MCA ICF Compressor Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA LEGEND: Table 15 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 Power Supply: 220V/3PH/60Hz MFA Unit Characteristic MCA ICF Compressor Condenser Fan Motor DOL PWS QTY RLA LRA QTY FLA LRA LEGEND: Table 16 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 Dimensional LEGEND Data 1 CONDENSER FAN s: 5011 & MODEL: 5011/6014 MODEL: 5011/6014 CONDENSER COIL A1 A3 3 CONTROL PANEL LEGEND 4 COMPRESSOR 1 CONDENSER FAN ALL DIMENSIONS ARE IN INCHES [mm] 2 CONDENSER COIL A1 A3 3 CONTROL PANEL 4 COMPRESSOR ALL DIMENSIONS ARE IN INCHES [mm] A2 A4 45 (1143) 1 A2 68 (1727) A (1312) (1143) (457) SUC.Ø LIQ.Ø RIGGING HOLES Ø.79 (20) 4 Nos. SUC.Ø 68 (1727) (1312) 3.94 (0) 4 18 (457) LIQ.Ø 6 (152) RIGGING HOLES Ø.79 (20) 4 Nos. ACCESS CALE ENTRY HOLES Ø1 (25) & 1 1/2 (38) (WITH RUER GROMMET) 6 (152) 3.94 (0) 4 7 (178) 6 (152) ACCESS CALE ENTRY HOLES Ø1 (25) & 1 1/2 (38) (WITH RUER GROMMET) 6 (152) s: 5015 & 6018 A A3 ACCESS MODEL: 5015/ (635) 3 A2 40 (16) A4 CENTRE OF GRAVITY (1778) (1118) SUC.Ø (1315) ACCESS RIGGING HOLES Ø.79 (20) 4 Nos. LIQ.Ø 18 (457) 7 7 (178) MODEL: 5015/ (0) CALE ENTRY HOLES 4 4 Ø1 (25) & 1 1/2 (38) (2) (WITH RUER GROMMET) (178) 24

25 Dimensional Data s: MODELS: / & MODEL DIMENSIONS A C D Y * *6025 [525] [305] [635] [457] [457] [2] [2] [711] *MODEL WITH ONE COMPRESSOR DIM.12" INSTEAD OF "/C FOR ONE COMPRESSOR M ALL DIMENSIONS ARE IN INCHES [mm] Table A1 Y A3 2 A2 42 (67) 3 A4 CENTRE OF GRAVITY 58 (1473) 84 (2134) SUC.#1 SUC.# (1340) LIQ.#1 LIQ.# A (0) RIGGING HOLES Ø.79 (20) 4 Nos. C * ACCESS * * CALE ENTRY HOLES Ø1 (25) & 1 1/2 (38) (WITH RUER GROMMET) D 7 (178) s: & MODELS 5026 to 5038 & 6031 to 6044 A1 A3 LEGEND 1 CONDENSER FAN 2 CONDENSER COIL 3 CONTROL PANEL 4 COMPRESSOR Y A2 X A4 CENTRE OF GRAVITY MODEL DIMENSIONS H L A C D X Y [1340] [2032] [457] [457] [254] [254] [92] [92] [1543] [1930] [457] [457] [2] [2] [92] [92] * *6037 [1543] [1930] [525] [305] [41] [1118] [1543] [1930] [525] [457] [2] [2] [92] [67] [1848] [2032] [525] [457] [2] [2] [67] [67] * *6044 [1848] [2032] [577] [305] [41] [1118] *MODEL WITH ONE COMPRESSOR Table 18 DIM.12" INSTEAD OF "/C FOR ONE COMPRESSOR MPDEL ALL DIMENSIONS ARE IN INCHES [mm] L 88 (2235) H SUC.#1 LIQ.#1 SUC.#2 LIQ.#2 A RIGGING HOLES Ø.79 (20) 4 Nos (0) C ACCESS * D * CALE ENTRY HOLES * Ø1 (25) & 2 (51) (WITH RUER GROMMET) 7 (178) MODELS 5042 to 5060 & 6050 to

26 LIQ.#1 LIQ.#2 SKM Air Cooled Condensing Units ACCESS Dimensional Data MODELS 5042 to 5060 & 6050 to 6070 s: & 6070 Y RIGGING HOLES Ø.79 (20) 4 Nos. A1 A2 X 4 84 (2134) A3 A4 CENTRE OF GRAVITY H (0) SUC.#1 A C * D * CALE ENTRY HOLES * Ø1 (25) & 2 (51) (WITH RUER GROMMET) 88 (2235) 7 SUC.#2 MODEL DIMENSIONS H A C D X Y [1975] [551] [551] [2] [2] [1219] [1118] [1975] [551] [483] [2] [2] [1194] [965] * *6053 [1975] [655] [305] [1194] [1118] * *6061 [2178] [655] [305] [1194] [1118] [2178] [602] [483] [2] [2] [1219] [965] [2178] [551] [551] [2] [2] [1219] [16] [2178] [602] [551] [2] [2] [1219] [991] *MODEL WITH ONE COMPRESSOR Table 19 DIM.12" INSTEAD OF "/C FOR ONE COMPRESSOR MODEL ALL DIMENSIONS ARE IN INCHES [mm] (178) 3 H SUC.#1 LIQ.#1 SUC.#2 LIQ.#2 8 (203) A RIGGING HOLES Ø.79 (20) 4 Nos (125) ACCESS D * * * C CALE ENTRY HOLES Ø1 (25) & 2 (51) (WITH RUER GROMMET) s: & s 5064 to 5074 / 6075 to 6085 LEGEND 1 CONDENSER FAN 2 CONDENSER COIL 3 COMPRESSOR 4 CONTROL PANEL [254] A [2214] A3 [254] ALL DIMENSIONS ARE IN INCHES[mm] CIRCUIT2 CIRCUIT1 A2 A4 88 [2235] 7.2 [2722] [28] 0 [2540] FILTERED VENTILATION ON OTH SIDES LIQUID Øx2Nos. DETACHALE PLATE FOR CALE ENTRY 4.9 [125] SUCTION Øx2Nos. STEEL WIRE GUARD 3 RIGGING HOLES Ø 7/8 [22] 4 Nos. 26 s 5075 & 5085 / 6090 & 60 LEGEND 1 CONDENSER FAN 2 CONDENSER COIL [254] A1 A3 A5 [254]

27 LIQUID Øx2Nos. SKM Air Cooled Condensing Units Dimensional Data s: 5075, 5085 & 6090, 60 SUCTION Øx2Nos. RIGGING HOLES Ø 7/8 [22] 4 Nos. LEGEND 1 CONDENSER FAN 2 CONDENSER COIL 3 CONTROL PANEL 4 COMPRESSOR [254] A1 A3 A5 [254] ALL DIMENSIONS ARE IN INCHES [mm] CIRCUIT2 CIRCUIT1 A2 A4 A6 88 [2235] 47 [1195] [3445] 88.6 [2250] 12 [305] FILTERED VENTILATION OTH SIDE 5.91 [2690] [2420] LIQUID Øx2Nos [750] DETACHALE PLATE FOR CALE ENTRY 4.9 [125] SUCTION Øx2Nos. RIGGING HOLES 4 Ø7/8 [22] x 4 Nos. s 5080, 5090 to 55 & 6095, 65 to 6120 s: 5080, 5090, 55 & 6095, 65, 6120 LEGEND 1 CONDENSER FAN 2 CONDENSER COIL 3 CONTROL PANEL 4 COMPRESSOR [254] 20 [508] A1 A3 A5 A7 [254] ALL DIMENSIONS ARE IN INCHES [mm] CIRCUIT2 CIRCUIT1 A2 A4 A6 A8 88 [2235] 88.6 [2250] [4500] 88.6 [2250] [305] FILTERED VENTILATION OTH SIDE [2715] [2420] LIQUID Øx2Nos [750] DETACHALE PLATE FOR CALE ENTRY 5.91 [150] SUCTION Øx2Nos. RIGGING HOLES 4 Ø7/8 [22] x 4 Nos. 27

28 LOADING POINTS 50 Hz 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 Table 20 28

29 LOADING POINTS 60 Hz 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 Table 21 29

30 Location and Space Requirements SKM Condensing Units should be located on a flat base, either on the ground or on a roof top, which is strong enough to hold the operating weight of the unit. The most important consideration when deciding upon the location of Air Cooled equipment is the provision for supply of ambient air to the condenser and removal of heated air from the condenser. For recommended clearances refer to Table 22 below. Where this essential requirement is not adhered to, it will result in a higher condensing temperature which causes poor operation, and eventual failure of the equipment. Units should not be located in the vicinity of steam, hot air or fume exhausts. Condensing Units should be sited away from noise sensitive places. Units may be mounted on anti vibration mounts suitable for operating weight, to prevent vibration and noise from being transmitted into the building structure. Orientation of the Condensing Units, if possible, to be so that prevailing winds blow against the control panel or access end of the unit rather than against the condenser coil(s). For parallel location of multiple a minimum 50% more than the recommended clearances as shown below should be maintained. There should be no obstruction above the fans and no ductwork should be connected to any fan outlet. The Air Cooled Condensing Units are meant for outdoor installation and may not be protected any further from the elements. However, on ground level installations option CGP may be desirable for protection of the condenser coil against vandalism. A C ALLDIMENSIONS ARE IN INCHES[mm] Table 22 30

31 Multiple Units Installation A A A A SPACING FOR SERVICE AND ACCESS SPACING FOR SERVICE AND ACCESS FIG. 1 A FIG. 1 A FIG. 4 A A A A SPACING FOR AIR FLOW FIG. 2 FIG / /6014, 5021/ / / /6014, 5021/6025 FIG /6027 FIG /6050, 5043/6051, 5045/6053, 5042/6050, 5051/6061, 5043/6051, 5052/6062, 5053/6063, 5045/6053, 5060/ /6061, 5052/6062, 5053/6063, 5060/6070 SINGLE UNIT INSTALLATION SINGLE UNIT INSTALLATION SPACING FOR AIR FLOW FIG /6075, 5070/6080, 5074/ /6075, 5070/6080, 5074/6085 A * A * A A A * * A SPACING FOR AIRFLOW & SERVICE SPACING FOR AIRFLOW & SERVICE FIG. 3 FIG. 6 FIG /6031, 5030/6035, 5032/ /6038, 5026/6031, 5036/6042, 5030/6035, 5038/ / /6038, FIG /6042, 5038/6044 MULTIPLE UNIT INSTALLATION MULTIPLE UNIT INSTALLATION C C 5015/ /6018 A C A 5075/6090, 5080/6095, 5085/ /6090, 5090/65, 5080/6095, 5095/61, 5085/60 55/ /65, 5095/61, 55/6120 A * C C A * A * A C A A * Multiple Units Installation 5011/6014 to 55/ /6014 to 55/ /6014 to 55/ /6090, 5080/6095, 5085/ /65, 5075/6090, 5095/61, 5080/6095, 55/ / /65, 5095/61, 55/

32 Typical Refrigeration Piping Legend 1 1. Expansion Valve Sight Glass. 3. Solenoid Valve. 4. Filter Drier. 5. Shut Off Valve. 6. Liquid Line. 7. Suction Line. 6 CONDENSING UNIT () AIR FLOW AHU AIR FLOW AHU Single Circuit Unit Shown. For unit with multiple circuits, piping will be identical. DOTTED IN CASE OF DOULE SUCTION RISER CONDENSING UNIT () 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 R22; 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 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 Series, the DX coil selection in a MAH or other air handler from SKM should be based on total capacity. For multiple 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 multiple 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. 32

33 Recommended Refrigerant Line Sizes Circuit 1 Liquid Line, Inches Circuit 2 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft 25ft 50ft 75ft 0ft /8 5/8 5/8 7/8 1 1/8 1 3/8 1 3/8 1 5/ /8 5/8 7/8 7/8 1 3/8 1 5/8 1 5/8 1 5/ /8 7/8 7/8 7/8 1 5/8 1 5/8 2 1/8 2 1/ /8 5/8 5/8 7/8 5/8 5/8 5/8 7/8 1 1/8 1 3/8 1 3/8 1 5/8 1 1/8 1 3/8 1 3/8 1 5/ /8 7/8 7/8 7/8 5/8 5/8 5/8 7/8 1 3/8 1 5/8 1 5/8 2 1/8 1 1/8 1 3/8 1 3/8 1 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 1 5/8 1 3/8 1 5/8 1 5/8 1 5/ /8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 5/ /8 7/8 7/8 7/8 5/8 5/8 5/8 5/8 1 5/8 2 1/8 2 1/8 2 1/8 1 1/8 1 3/8 1 3/8 1 3/ /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 3/8 1 5/8 1 5/ /8 7/8 1 1/8 1 1/8 2 1/8 2 1/8 2 5/8 2 5/ /8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 1 5/8 1 5/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/ /8 7/8 1 1/8 1 1/8 5/8 5/8 5/8 5/8 2 1/8 2 1/8 2 1/8 2 5/8 1 1/8 1 3/8 1 3/8 1 5/ /8 1 1/8 1 1/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/ /8 1 1/8 1 1/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/ /8 7/8 1 1/8 1 1/8 5/8 5/8 7/8 7/8 2 1/8 2 1/8 2 5/8 2 5/8 1 3/8 1 3/8 1 5/8 1 5/ /8 7/8 1 1/8 1 1/8 5/8 7/8 7/8 7/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/ /8 7/8 1 1/8 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/ /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 7/8 1 1/8 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 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 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/ /8 1 1/8 1 1/8 1 3/8 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 1/ /8 1 1/8 1 1/8 1 3/8 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 1/8 2 1/8 2 5/ /8 1 1/8 1 1/8 1 3/8 7/8 7/8 1 1/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 1/ /8 1 1/8 1 1/8 1 3/8 7/8 1 1/8 1 1/8 1 3/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ /8 1 1/8 1 1/8 1 3/8 7/8 1 1/8 1 1/8 1 3/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/ /8 1 1/8 1 1/8 1 3/8 7/8 1 1/8 1 1/8 1 3/8 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 Suction Line, Inches Circuit 2 Table 23 SKM Condensing Units are designed for satisfactory operation with single suction line. In some cases of low load operation, it is recommended connecting a double suction riser for applications having option CRS. 1. Suction Line sizing selection recommendation in Table 23 is based on (2 F) 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 23 is based on (2 F) temperature drop. 4. Recommended line sizes in Table 23 are for guidance only. For detailed proper piping, consult recognized piping references like ASHRAE Guide and Data ook for assistance. 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 pipes, electrical components & enclosed 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 R22 should be done at site). Unit shall be capable to operate from 50 F ( C) to 120 F (48.9 C) ambient temperature and shall be rated in accordance with AHRI365 standard. COIL(S) Coil shall be air cooled with integrated 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. REFRIGERANT PIPING The refrigerant circuit piping shall be fabricated from ACR grade copper piping, with 1 or 2 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 117. Unit casing shall be provided with access panels for easy service and maintenance of all units parts. CONTROL PANEL The panel shall be factory wired in accordance with NEC 430 & 440, and conforms to IP54 requirements. Control Panel shall contain individual electrical components contactors, fan motor circuit breakers, transformer, antirecycling time delay relay, control circuit disconnect switch, power & control circuit terminal blocks, high / low pressure & oil failure switch. (Please refer to page 5 & 6 for detailed information of Control Panel). 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. 34

35 NOTES 35

36 SKM Air Cooled Condensing Units HEAD OFFICE P.O ox: 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 Abu Dhabi Dubai P.O ox: Tel: Fax: abudhabisales.skm@skmaircon.com P.O ox: Tel: Fax: dubaisales.skm@skmaircon.com Al Ain Tel: Fax: alainsales.skm@skmaircon.com Saudi Arabia (Production Facility) 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 Dasman P.O ox: 1215PC Tel: Fax: kuwaitsales.skm@skmaircon.com Algeria Aissat Idir ( EXENMA) City ldg1, Flat 2, Dar El eida Algiers Tel: Fax: algeriasales.skm@skmaircon.com For SKM Distributors visit: /2015 Supersedes # 013/2014