Schreiber Chillers 2500ACsf - Manual (Page 26)

2500AC
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 can damage the refrigeration system by the water being at a low
level, it will only affect the efficiency of the unit. Suggest you flush out the water
reservoir, should the water become rusty or some other foreign matter.
5. Caution: The compressor receivers and water pump could be hot enough to injure
one touching these components.
6. The solid state controller reads discharge & return temperature.
7. 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. The Alco
valve is one of the most reliable parts. If this valve needs to be
changed out, you 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 you just have two or
three pounds of gauge pressure. Remove the power element
and install 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. Never adjust the super heat. Call factory first.
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