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INSTALLATION

GENERAL SERVICEABILITY

Equipment of this type is intended for installation by
qualified servicemen’only. As a condition of the war-
ranty, the check, test, and start-up procedure must be

performed by such personnel and properly reported on
the form provided. Failure to do so voids the warranty.
Arrangement for service should be 

made 

prior to instal-

lation, as it is not included in the warranty or the

catalog price. See warranty terms on Page 3.

The compressor compartment is accessible from the

top and two sides by easily 

removed 

panels.

All control and starting equipment is located in the

control cabinet. The control panel is protected by a
weatherproof enclosure having a gasketed and hinged
door.

The condenser fan motors on belt driven units are

accessible through generously sized access doors for
checking the fan motor, belts, and drives.

INSPECTION 

On belt drive units, the condenser fan bearings are

equipped with external lubrication fittings.

When the equipment is received, all items should be
carefully checked against the bill of lading to be sure
that ail crates and cartons have been received. All
units should be carefully inspected for damage when
received and all damage should be reported immedi-

ately to the carrier, and a claim filed for damage. The
unit nameplate should be checked to be sure it agrees
with the power supply available.

The direct drive fan motors are serviced through the

fan opening.

REFRIGERANT CHARGE

LOCATION

Every model PAB SEASONPAK air cooled water chiller

is supplied with a full refrigerant charge for the job

requirements (see  Table 6, Pages 8 and 9). Charge for

s p e c i f i c   u n i t s   c a n   be obtained f’rom the nameplatc.

The McQUAY line of air cooled water chillers is de-
signed for outdoor application. The chiller unit should
be located so that all four sides of the unit have free
area for inlet air flow. The units have vertical conden-

ser air discharge, with air taken in from the underside

of the unit.

HANDLING

A level and sufficiently strong base is required to

support the SEASONPAK air cooled water chiller. If

necessary, additional supports should be provided to
transfer the weight of the unit to the nearest adequate

structural members of the building.

The unit location should be such that the service-

man has free access to the compressor compartment,
refrigerant system components (i.e., strainerdriers),

condenser fan motors, and electrical control cabinet.

\,‘ibration  isolators are recommended under all roof

mounted units or where vibration transmission is crit-

i c a l  Recommended mounts are shown in Table 1,
Page 6.

Care should be taken to avoid rough handling or shock
due to dropping the unit. Never push or pull the unit
from anything other than the skids. Do not drop either
end of unit off of truck tail gate. For lifting, slings

should be provided, with spreader bars to protect the
aluminum housing. The dual units are furnished with
permanent full length skids. The single compressor
units are shipped on wooden skids. Lifting adapter
holes are furnished on the dual unit skids. Lifting
lugs are furnished on the single unit side channels.

All legs have convenient holes for use in moving the
unit.

T h e  single compressor unit leg base plates have

three holes for convenient location of legs for fasten-
ing to “I” beam or channel bases.

 

 

Page

 A

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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