AAON CL SERIES Installation, Service And User Manual Download Page 26

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REFRIGERANT PIPING cont.

TABLE RP-1 Predetermined Line sizes for Dual Circuit CL units with R-410A

R-410A

Connection Size

Predetermined Line Size

Tons System

Suction Line Liquid Line Hot Gas Bypass Reheat Suction Line Liquid Line Hot Gas Bypass Reheat

1-3/8 in.

7/8 in.

1-5/8 in.

7/8 in.

3/4 in.

1-1/8 in.

1-5/8 in.

7/8 in.

1-1/8 in.

2-1/8 in.

1-1/8 in.

3/4 in.

1-1/8 in.

7/8 in.

1-1/8 in.

3/4 in.

1-1/8 in.

1-5/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

1-5/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

1-5/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

2 2-1/8

in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

7/8 in.

1-1/8 in.

3/4 in.

1-1/8 in.

100

1-5/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

1
2

110

1-5/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

1-3/8 in.

1
2

1-5/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

125

3 2-1/8

in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

1
2

1-5/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

134

3 2-1/8

in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

1-5/8 in.

7/8 in.

1-1/8 in.

2-1/8 in.

1-1/8 in.

3/4 in.

1-1/8 in.

135

2-1/8 in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

1-5/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

155

2-1/8 in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

1
2

170

2-1/8 in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

1
2

1-5/8 in.

1-1/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

190

2-1/8 in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

1-5/8 in.

1-3/8 in.

2-1/8 in.

1-1/8 in.

7/8 in.

2
3

210

2-1/8 in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

1
2
3

230

2-1/8 in.

1-1/8 in.

7/8 in.

1-5/8 in.

2-5/8 in.

1-3/8 in.

1-1/8 in.

1-3/8 in.

Summary of Contents for CL SERIES

Page 1: ...CL SERIES ROOFTOP CONDENSING UNITS INSTALLATION SERVICE OWNER S INFORMATION MANUAL...

Page 2: ...DENSER SECTION General Information Pre Start Up Maintenance Recommendations Water Quality AIR COOLED CONDENSER SECTION REFRIGERANT PIPING FOR CL SERIES Equivalent Line Length Liquid Line Sizing Suctio...

Page 3: ...the interest of product improvement AAON Inc reserves the right to change pricing specifications and or design of its products without notice obligation or liability 2007 AAON Inc all rights reserved...

Page 4: ...pump refrigerant gas damage may occur when power is restored Before unit operation the main power switch must be turned on for at least twenty four hours for units with compressor crankcase heaters T...

Page 5: ...es must be carefully selected Be sure to observe the dimensions that are on the rating plate of the condenser for operational and service clearances which will appear as follows Service Clearances Uni...

Page 6: ...city that in turn increases the condensing pressure At the same time the bypassed hot gas raises liquid pressure in the receiver allowing the system to operate properly There are different types of lo...

Page 7: ...led an ORI valve Open on Rise of Inlet pressure As the ambient temperature drops the condenser capacity increases and the condensing pressure falls causing the ORI to modulate toward the closed positi...

Page 8: ...wise rotation decreases the setting To obtain the desired setting a pressure gauge should be used at the compressor discharge service valve so the effects of any adjustment can be observed Small adjus...

Page 9: ...eck motor amperage to ensure that the amperage listed on the motor nameplate is not exceeded Refrigerant Piping Connections CL condensing unit refrigerant piping connections are located in the upper c...

Page 10: ...10 Diagram of Evaporative cooled condenser Section including field water connections and base cutout tap...

Page 11: ...ly place the controller in the Run mode and observe the system until it reaches a steady state of operation Axial Flow Fans Multi Wing Z Series Aluminum Fan Blade Pitch Angle Setting Instructions Befo...

Page 12: ...ce first one or two pieces depending on above If code is RET place one retainer ring only down on the work surface first A weighted coffee can could be used to elevate the fan from the work surface Us...

Page 13: ...harging information beginning on page 14 Air cooled and evaporative cooled condenser units require different maintenance schedules procedures Unit specific instructions for both types are included in...

Page 14: ...e the temperature of the liquid line as it leaves the condenser coil 2 Read the gauge pressure reading of the liquid line close to the point where the temperature was taken You must use liquid line pr...

Page 15: ...d back option being charged in the winter when the ambient temperature is cold 1 Once enough charge has been added to get the evaporator superheat and sub cooling values to the correct setting more ch...

Page 16: ...ent any biological contamination GENERAL INFORMATION Severe Service The following recommended maintenance procedures are basic requirements for normal operating environments For severe operating condi...

Page 17: ...n on and the pump cycled on and off to maintain head pressure control under any conditions The unit is equipped with a water temperature controller which varies fan speed to maintain sump water temper...

Page 18: ...is the low water level probe shown as lo on the wiring diagram The medium length probe is for the medium water level shown as med on the wiring diagram The short probe is for the high water level sho...

Page 19: ...rrosion Never use hydrochloric acid muratic acid as it will corrode stainless steel Sequence of Operation On a call for cooling the condenser pump is activated A pressure switch in the pump discharge...

Page 20: ...ations 6 Inspect axial fans and eliminators removing any debris which may have accumulated during operation 7 Inspect the water distribution system to insure that nozzles and spray orifices are functi...

Page 21: ...NSER The air cooled condenser section rejects heat by passing outdoor air over the fin tube coils for cooling of the hot refrigerant gas from the compressors The heated air will discharge from the top...

Page 22: ...e liquid line due to frictional contact installed accessories and vertical risers are inevitable Maintaining adequate sub cooling at the condenser to overcome these losses is the only method to ensure...

Page 23: ...velocity but also the frictional loss A double suction riser can be applied in this situation The double suction riser is designed to return oil at minimum load while not incurring excessive frictiona...

Page 24: ...e length of the HGBP line with a minimum 1 inch thick Armaflex insulation Refer to figure RP 5 for piping diagram Hot Gas Bypass Piping Considerations for Evaporator Below Condensing Unit The line mus...

Page 25: ...ble Second determine the refrigerant being used AAON offers CL products with R 410A and R 22 refrigerants and the line sizes are not identical for both Next determine whether the product is operating...

Page 26: ...8 in 1 2 110 3 1 5 8 in 1 1 8 in 7 8 in 1 3 8 in 2 1 8 in 1 1 8 in 7 8 in 1 3 8 in 1 2 1 5 8 in 1 3 8 in 2 1 8 in 1 1 8 in 7 8 in 125 3 2 1 8 in 1 1 8 in 7 8 in 1 5 8 in 2 5 8 in 1 3 8 in 1 1 8 in 1 3...

Page 27: ...8 in 1 5 8 in 1 2 110 3 2 1 8 in 7 8 in 7 8 in 1 3 8 in 2 5 8 in 1 1 8 in 1 1 8 in 1 5 8 in 1 2 2 1 8 in 7 8 in 1 3 8 in 1 1 8 in 125 3 2 5 8 in 1 3 8 in 7 8 in 1 5 8 in 2 5 8 in 1 3 8 in 1 1 8 in 1 5...

Page 28: ...2 1 8 in 1 1 8 in 7 8 in 3 5 8 in 7 8 in 1 5 8 in 7 8 in 3 4 in 95 4 1 5 8 in 7 8 in 7 8 in 1 1 8 in 2 1 8 in 1 1 8 in 7 8 in 1 1 8 in TABLE RP 4 Predetermined Line sizes for Single Circuit CL units w...

Page 29: ...t is the lighter area Select the corresponding predetermined line size from TABLE RP 1 on page 26 FIGURE RP 2 Riser height versus total equivalent line length for R22 split system applications with du...

Page 30: ...t is the lighter area Select the corresponding predetermined line size from TABLE RP 3 on page 28 FIGURE RP 4 Riser height versus total equivalent line length for R22 split system applications with si...

Page 31: ...1 FIGURE RP 5 Hot Gas Bypass Piping Diagram with air handler above condenser Note Components shown within air handler and condensing unit are factory installed all other components are field installed...

Page 32: ...2 FIGURE RP 6 Hot Gas Bypass Piping Diagram with air handler below condenser Note Components shown within air handler and condensing unit are factory installed all other components are field installed...

Page 33: ...IGURE RP 7 Reheat Hot Gas Bypass Piping Diagram with air handler above condenser Note Components shown within air handler and condensing unit are factory installed all other components are field insta...

Page 34: ...IGURE RP 8 Reheat Hot Gas Bypass Piping Diagram with air handler below condenser Note Components shown within air handler and condensing unit are factory installed all other components are field insta...

Page 35: ...pass Piping Diagram with air handler evaporator above condenser and field installed suction line accumulator Note Components shown within air handler and condensing unit are factory installed all othe...

Page 36: ...Gas Bypass Piping Diagram with air handler below condenser and field installed suction line accumulator Note Components shown within air handler and condensing unit are factory installed all other com...

Page 37: ..._________________ Yes No 4 Do all access doors open freely and are the handles operational _____________________________ Yes No 5 Have all shipping braces been removed ________________________________...

Page 38: ...CHARGE SUCTION LIQUID REFRIGERATION SYSTEM 3 SATURATED LINE PRESSURE TEMPERATURE TEMPERATURE SUB COOLING SUPERHEAT DISCHARGE SUCTION LIQUID REFRIGERATION SYSTEM 4 SATURATED LINE PRESSURE TEMPERATURE T...

Page 39: ...39 NOTES...

Page 40: ...CL SERIES CONDENSING UNIT INSTALLATION SERVICE OWNERS INFORMATION MANUAL AAON Inc 2425 South Yukon Tulsa Oklahoma 74107 Phone 918 583 2266 Fax 918 583 6094 R10110 Rev B 4 07...

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