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McQuay Seasonpak PAB Series, Installation And Maintenance Data

The McQuay Seasonpak PAB Series offers high-quality, energy-efficient HVAC solutions for your building. Ensure proper installation and maintenance with the comprehensive Installation And Maintenance Data manual. Download it for free from manualshive.com to keep your system running smoothly and efficiently.

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Summary of Contents for Seasonpak PAB Series

Page 1: ...15 AUGUST 1967 FORM 206034Y INSTALLATION AND MAINTENANCE DATA MODEL PAB AIR COOLED WATER CHILLER 7 1 2 THRU 60 TONS INC 13600 INDUSTRIAL PARK BLVD P O BOX 1551 MINNEAPOLIS MINNESOTA 55440 PHONE 377 97...

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Page 3: ...Lability not strictly in accordan further warranty is h this policy except to the extent that such in writing and signed by an official of Mc Quay for additional consideration n in accordance with an...

Page 4: ...charge for the job requirements see Table 6 Pages 8 and 9 Charge for specific units can be obtained f rom the nameplatc The McQUAY line of air cooled water chillers is de signed for outdoor applicatio...

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Page 11: ...s covering specific rcquircments CRANKCASE HEATERS The compressors are equipped with crankcase heaters Some models have heaters installed externally below the crankcase and others have heaters inserte...

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Page 17: ...Check to see that the water temperature thermo stat is installed in the entering water line The L thermostat well is to be full of heat conducting compound and the bulb must be secured with the retain...

Page 18: ...graph E B Turn pumpdown switches S3 and S4 to auto posi tion Check liquid sight glass ahead of expansion valve for proper refrigerant charge C Observe operation for several minutes noting un usual sou...

Page 19: ...or at the unit an impedance relay is incorporated in the control circuit Basically this type of control is centered around a relay with a high impedance holding coil connected in series with the basic...

Page 20: ...low side of the system and its purpose is to shut down the D E compressor at the end of the pumpdown cycle It will open at 35 psig and automatically reset at approximately 60 psig The control can be c...

Page 21: ...een switches Do NOT make any adjustments other than the dial as this is a preset precision control TO CHANGE THE SET POINT 1 2 3 Loosen the setscrews on the collar below the hex nut see Fig 7 Turn the...

Page 22: ...checked as follows A Make up a depth gauge for inserting through the adjusting nut opening and long enough to hit the CONTROLS B C D E bottom of the bellows section as indicated in the diagrams A piec...

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Page 24: ...t the nuisance of water dripping from the lines If insulation is not of the self contained vapor barrier type it should be covered with a moisture seal Do not insulate piping until it has been tested...

Page 25: ...on chamber on the motor end of the compressor Shut off valves E F G VIEW FROM END OF COOLER STRAIGHT PIPE EE D x D x 1 are never installed in these control lines The compressor is pre charged with suf...

Page 26: ...or of the moisture indicator button is an indication of the dryness of the system and is ex tremely important when the system has been ser v i c e d Immediately after the system h a s been opened for...

Page 27: ...nto heavy duty steel tube sheets and s c a l e d by a cast steel refrigerant head B The water connection nozzles which enter and leave the shell are on the same side of the unit No special attention i...

Page 28: ...e s s d D i s c h a r g e s h u t o f f v a l v e p a r t i a l l y d O p e n v a l v e c l o s e d L o w D i s c h a r g e P r e s s u r e a F a u l t y c o n d e n s e r t e m p e r a t u r e r e g...

Page 29: ...A d j u s t t h e r m a l e x p a n s i o n v a l v e C o m p r e s s o r l o s e s o i l a L o c k o f r e f r i g e r a n t b E x c e s s i v e c o m p r e s s i o n r i n g b l o w b y a C h e c k...

Page 30: ...ng parts refer to the model number and serial number of with an explanation of the malfunctions and a descrip the unit as stamped on the serial plate attached to the tion of the replacement parts requ...

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