Related Manuals for McQuay SEASONCON ALP-037A
Summary of Contents for McQuay SEASONCON ALP-037A
- Page 1 SEASONCON” PACKAGED AIR COOLED CONDENSING UNIT MODELS ALP-037A THRU 057A & 067B THRU 159B G R O U P mcQua+PEarEx Inc. 13600 Industrial Park Blvd., P.O. Box 1551, Minneapolis, Mn. 55440 c$...
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Page 3: Installation
INTRODUCTION GENERAL DESCRIPTION McQuay type ALP SEASONCON air cooled condensing nection to any air or water cooling evaporator. units are designed for outdoor installations and are com- The electrical control center includes all safety and patible with either air handling or chilled water systems. -
Page 6: Refrigerant Piping
REFRIGERANT PIPING G E N E R A L EVAPORATOR BELOW CONDENSING UNIT McQuay type ALP condensing units are adaptable to either chilled water or air handling air conditioning applications. Figure 7 shows an installation where the evaporator is The only restriction on applications is that the evaporator installed below the condensing unit. -
Page 7: Refrigerant Piping Connections
8 gives connection locations and sizes for all ALP models. LIQUID LINE COMPONENTS Replaceable core type filter-driers McQuay has available a “Liquid Line Accessory Kit” for each ALP unit size. Components selected for these kits Filterdrier core elements 3. Refrigerant solenoid valves... -
Page 9: Refrigerant Charge
HOT GAS BYPASS COMPONENTS REFRIGERANT CHARGE McQuay offers a “Hot Gas Bypass Accessory Kit” for each Each ALP condensing unit is designed for operation using ALP unit size. Each kit includes a manual shut-off valve, a refrigerant 22. Table 7 lists approximate refrigerant charge solenoid valve, a hot gas bypass valve and an instruction required and the condenser pumpdown capacity. -
Page 35: Startup And Shutdown
This form is shipped with the unit and desired chilled water or leaving air temperature. after completion should be returned to McQuay Ser- Allow the crankcase heaters to operate for at least 12 vice Department through your sales representative. -
Page 36: Fan Shaft Bearings
REFRIGERANT SIGHTGLASS The refrigerant sightglasses should be observed periodically. ordered from McQuay as part of the “Liquid Line Acces- (A monthly observation should be adequate.) A clear glass sory Kits” listed on page 7, an element inside the sightglass... -
Page 37: Filter-Driers
Typically, superheat should run in the range of IOF to 15F. valve. If this problem can be traced to the power element On valves purchased through McQuay, the superheat setting only, it can be unscrewed from the valve body without... -
Page 38: In-Warranty Return Material Procedure
IN-WARRANTY RETURN MATERIAL PROCEDURE COMPRESSOR vide McQuay with full details: McQuay unit model and unit Copeland Refrigeration Corporation has stocking whole- serial numbers. Include the invoice and the salvage value salers who maintain a stock of replacement compressors credit memo copies and we will reimburse the difference. In... -
Page 39: High Pressure Control
HIGH PRESSURE CONTROL The high pressure control is a single pole pressure activated by watching condenser pressure rise. The highest point switch that opens on a pressure rise to de-energize the reached before cut-out is the cut-out setting of the control. entire control circuit except for compressor crankcase Although there is an additional pressure relief CAUTION:... -
Page 40: Optional Controls
OPTIONAL CONTROLS SPEEDTROL - HEAD PRESSURE CONTROL ALP-037A thru 078B The SPEEDTROL system of head pressure control operates SC1 1 and SC21 are mounted inside the compressor in conjunction with FANTROL by modulating the motor compartment near the top of the condenser coils. Units speed on tans 11 and 21 in response to condensing pressure. - Page 41 LOW AMBIENT START (OPTIONAL) Low ambient start available on all units as an option with switch(es) PSl o r P S 2 t o t h e “ m a n u a l p u m p d o w n ” FANTROL and included automatically with optional position.
- Page 42 (see injury in a very short time so care should cause Figure 11). The pressure regulating valve that McQuay taken during valve checkout. offers is factory set to begin opening at 58 PSIG (32F for...
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Page 43: Troubleshooting Chart
TROUBLE SHOOTING CHART PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS 1. Main switch open, 1. Close switch. 2. Fuse blown. Circuit breakers open. 2. Check electrical circuits and motor wlnding for shorts or grounds. Investigate for possible overloading. Re- place fuse or reset breakers after fault is corrected. 3.