Schreiber Chillers 1000AC - Manual (Page 27)

TROUBLE SHOOTING - PART II
REFRIGERATION SYSTEM INTERNAL PRESSURE USING REFRIGERANT R-22
* High Pressure Switch : Manual Reset - Cut out at 425 P.S.I.
* Low Pressure Switch : Automatic Reset - Cut out at 25 P.S.I.
WORKING REFRIGERANT PRESSURES R-22
* High Pressure : 185 to 325 P.S.I.
* Low Pressure : 45 to 70 P.S.I.
***NOTE***
These pressures are under normal ambient temperatures and chilled water
temperatures.
When a water pump is used other than the standards water pump, in most cases we do
have to add overload protection. For example: The model 2000AC has a standard of 5
H.P water pump, this pump has internal protection. Should you need a 71/2 HP water
pump, then we would add an external overload.
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1000ac.doc