Schreiber-chillers Old 4 ton MRI Manuel d'utilisateur télécharger pdf (Page 29)

MAINTENANCE INFORMATION

1. There are no lubrication points on the chiller. All motors have permanent

lubrication in the bearings.

2. The water that is used in the chilled water circuit has no special requirements,

except that deionized water cannot be used. The water should be clean and some

type of water conditioner can be used. Nothing should be used in the chilled water

circuit that could damage the all copper Heat Exchanger. THIS INCLUDES THE

USE OF DEIONIZED WATER.

3. The air-cooled condenser should be cleaned on a regular basis, depending on the

environment the chiller is installed in.

4. The water level should be maintained as close to the level as marked on the water

sight glass. You cannot damage the refrigeration system by the water being at a

low level, it will only affect the efficiency of the unit.

5. Caution: The compressor receivers and water pump could be hot enough to injure

one touching these components.

6. The dial thermometer is reading the temperature of the discharge-chilled water.

7. Please note: This is a hermetically sealed compressor. There are no necessary

maintenance requirements. Please read the service bulletins before making any

repairs.

NOTICE ON EXPANSION VALVE

This is a standard Alco Expansion Valve, Model #TLCE (size) HW.

These valves come from the factory pre-

set. For the proper super heat,

do not try to

adjust the super heat on this valve unless you call the

factory service department. This Alco valve is one of the most reliable

parts. If this valve needs to be changed out, do it without losing the R-

charge. To do this, turn the receiver off at the l

iquid line to the expansion

valve. Then pump the system down until there are two or three pounds of

gauge pressure. Remove the power element and install the replacement

power element, open the receivers liquid line valve. TEST FOR LEAKS

and restart the un

it. Remember; call the factory before you do any work

on the expansion valve.

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Schreiber-chillers Old 4 ton MRI Manuel d'utilisateur Page 29