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CL SERIES

ROOFTOP CONDENSING UNITS

INSTALLATION, SERVICE

OWNER’S INFORMATION MANUAL

Содержание CL SERIES

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 39: ...39 NOTES...

Страница 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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