Schreiber Chillers 1000AC-MRI - Manual (Page 30)

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.
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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-22
charge. To do this, turn the receiver off at the liquid 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 unit. Remember; call the factory before you do any work
on the expansion valve.