Maintenance information – Schreiber Chillers 750ACsf User Manual
Page 26
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. Never hurts to clean often. Once a month
will prevent future problems.
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. The evaporator could be damaged.
5.
Caution: The compressor receivers and water pump could be hot enough to
injure one touching these components.
6.
The controller is reading the temperature of the discharge-chilled water and the
return as displayed.
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. 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.