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PACKAGED WATER CHILLER
TYPE WHR 7% THRU 120 TONS
"McQUAY" and "SEASON PAK" are registered trademarks of McQuay , Inc., Minneapolis, Minnesota.
T A B L E O F C O N T E N T S
C O N T R O L S - C H E C K I N G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E L E C T R I C A L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTROL CENTER SERVICE
E L E C T R I C A L D A T A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MOVING & PLACING THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . .
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PIPING
REFRIGERANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACEMENT PARTS ................................... 30
SERVICE & MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START-UP PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLE SHOOTING CHART. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIBRATION ISOLATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION AND
MAINTENANCE DATA
. . . . . . . . . . . . . . . . . . . . . . . . . . .
126
B U L L E T I N N O . IM
AUGUST 1969
24
2
22-23
26-27
22-23
10-13
14-21
26-29
2
2
24
8-9
6-7
2
26-29
24
27-29
3-5
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Summary of Contents for McQuay Seasonpak WHR -008A
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Page 1: Table Of Contents
PACKAGED WATER CHILLER TYPE WHR 7% THRU 120 TONS “McQUAY” and “SEASON PAK” are registered trademarks of McQuay , Inc., Minneapolis, Minnesota. T A B L E O F C O N T E N T S C O N T R O L S - C H E C K I N G ........ -
Page 2: C R O S S R E F E R E N C E - N E W T O O L D M O
MOVING AND PLACING THE UNIT MOVING THE UNIT truck must be across both the front and rear channels The McQUAY SEASONPAK water chiller is mounted before lifting.Never put the weight of the unit against on heavy wooden skids to protect the unit from ac- the condensers. - Page 3 FIGURE NO. 1 FIGURE NO. 2 MOVING UNIT WITH FORK LIFT SUGGESTED RIGGING NOTE: ALWAYS LIFT ON SIDE OPPOSITE THE OTE: ALWAYS USE SPREADER CONTROL PANEL TO AVOID DAMAGING BARS TO PROTECT UNIT THE CONTROLS. FROM DAMAGE. L O C A T I O N P L A C I N G T H E U N I T Unit is designed for indoor application and must be The small amount of vibration normally encountered...
- Page 6 WATER PIPING G E N E R A L Piping practices vary considerably. In most cases, posed insulation thickness to make them accessible. codes, local ordinances and established practices govern the selection and installation of piping. Local CHILLED WATER THERMOSTAT building and safety codes and ordinances should be studied and complied with.
- Page 7 C O N D E N S E R - WATER PIPING ment wi II maintain a constant condensing pressure, re- General gardless of temperature conditions and assures enough For the best performance, the condenser water inlet head pressure for proper thermal expansion valve op- is established as the bottom connection of the con- eration.
- Page 8 REFRIGERANT PIPING REMOTE AIR COOLED CONDENSERS oil may collect in the riser and the horizontal header, causing the compressor to lose its oil and resultant For remote condenser application, such as an air damage due to lack of lubrication. cooled condenser, the chillers, with and without Another danger is when the compressor load is in- mounted receivers, are shipped containing a Refriger- creased, the oil that had collected during reduced...
- Page 9 2. A double riser discharge line may be used as shown or and receiver. The discharge line piping in this in Figure 12, Page 9. Line “A” should be sized case is not too critical. The principal problem en- to carry the oil at minimum load condition and line countered with this arrangement is that there is fre- quently insufficient vertical distance to allow free dition both lines would carry oil.
- Page 10 E L E C T R I C A L MODELS WHR-008A THRU 060A FIGURE NO. 15 1. FREEZESTAT (MANUAL RESET) 8. COMPRESSOR STARTING CONTACTORS OIL FAILURE SWITCH (MANUAL RESET) 9. CONTROL CIRCUIT FUSE 3. LEAD LAG SWITCH 10. CIRCUIT BREAKERS 4.
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Page 11: E L E C T R I C A L
E L E C T R I C A L MODELS WHR-008A THRU 060A F I E L D W I R I N G 25. The power from 25 is fed thru NC contacts to relay R3 and R4 to energizethe compressor crank- Only three main power leads need be hooked up to the case heaters, when the compressors are not oper- chiller on Models WHR-008A thru 060A. - Page 12 E L E C T R I C A L MODELS WHR-070A THRU 120A 3. Close all circuit breakers in both panels. FIELD WIRING Close control circuit system switch S1 located on Power leads must be run into each panel and be con- the outside face of the Left Hand panel.
- Page 13 MODELS WHR-070A THRU 120A (Continued) O F F C Y C L E (Refer to Diagrams 5 & 6) R3 will open and compressor 1A will turn off and stay off until relay R1 is again energized thru the On a decrease in entering water temperature thermo- thermostat.
- Page 24 START-UP PROCEDURE the thermostat well is full of heat conducting Do not start the SEASONPAK water chiller until the following steps have been completed. compound and that the bulb is secured with the Check all auxi liary components of the installation. retaining fitting.
- Page 25 gizing a 220 volt heater. This causes the normally On a two stage thermostat, the dial setting indi- closed bi-metallic relay switch of this control to open cates the average leaving water temperature that the after a delay of approximately 90 seconds or less, control will maintain.At a 44F setting, the high stage stopping the compressor and closing the liquid line should actuate at approximately 51F return water and...
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Page 26: Water
SERVICE AND MAINTENANCE sult in nusiance trip-outs. To clean the condenser, a To assure smooth operation at peak capacity and to chemical de-scaling solution should be used according avoid damage to package components, a program of to the manufacturer’s directions. periodic inspections should be set-up and followed. -
Page 28: Trouble Shooting Chart
TROUBLE SHOOTING CHART FIGURE NO. 20 POSSIBLE CORRECTIVE STEPS POSSIBLE CAUSES PROBLEM C l o s e s w i t c h . M a i n s w i t c h o p e n . C o m p r e s s o r w i l l n o t r u n . - Page 29 TROUBLE SHOOTING CHART FIGURE NO. 20 (Continued) POSSIBLE CORRECTIVE STEPS POSSI BL E CAUSES PROBLEM f ) C h e c k m e a n s f o r r e g u l a t i n g c o n d e n s i n g L o w S u c t i o n P r e s s u r e...
- Page 30 REPLACEMENT PARTS the date of installation of the unit and date of failure, When writing to McQuay for service or replacement parts, refer to the model number and serial number of along with an explanation of the malfunctions and a the unit as stamped on the serial plate, attached to description of the replacement parts required.
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