The low pressure cut-out will open the circuit if the filters are very dirty, if there is a restriction in the air
ducts, and/or if the system is not fully charged due to refrigerant leaks, etc. This control is of the
automatic reset type.
The high pressure cut-out will open the circuit if the condenser water circuit is fouled sufficiently to greatly
impair the heat transfer, if there is a restriction in the water piping, if there is no water, if water regulating
valve is set too high, and/or if the refrigerant system is greatly overcharged. This control is of the manual
Resetting of the high pressure control switch, P/N 057R101, is accomplished by depressing manual reset
lever located in the controls section of the NAC-600 (See Drawing #0700-1600).
WARNING ------------ WARNING ------------------- WARNING
IF UNIT IS STORED IN AN AREA WHERE THE TEMPERATURE MAY FALL BELOW
FREEZING, DRAIN ALL WATER FROM THE CONDENSER.
WHEN SERVICING THE UNIT, PURGE AS LITTLE GAS AS POSSIBLE FOR THE UNIT
CONTAINS A CRITICAL CHARGE THAT FACTORY METERED TO 1/2 POUND.
MINIMUM OPERATING CONDENSER WATER INLET PRESSURE OF 35 PSIG AT UNIT IS
REQUIRED FOR SATISFACTORY PERFORMANCE.