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CSRA-SVX01A-EN
Operation
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before
servicing. Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
Open unit disconnect switch before installing control circuit fuse (FU) in con-
trol panel.
The unit will now operate normally provided that: (1) the water temperature
thermostat (WTT) is calling for cooling, and (2) all system operating inter-
locks and safety circuits are satisfied.
Extended Unit Shutdown/Winterization
If the system is taken out of operation for long periods of time for any reason
(e.g., seasonal shutdown), use this procedure to prepare the system for
shutdown:
1. Check the refrigerant piping for leaks, fixing any that exist.
2. Service the chilled water pump and any air handling equipment according
to the manufacturer's recommendations.
3. Open both electrical circuit breakers for the unit and chilled water pump;
lock both in the open position.
CAUTION
Compressor Damage!
Lock both unit and chilled water pump circuit breakers in open position
to prevent compressor or pump damage due to accidental start-up
while system is in "shutdown" condition. Failure to do so may result in
equipment damage.
Winterization: Close all evaporator water supply valves and drain the evapo-
rator and water pump by removing the drain plug and opening the vent on
the entering water line just outside the unit. Re-install the drain plug. Since
the evaporator does not drain completely, add one quart of ethylene glycol
antifreeze to the remaining water through the vent or evaporator drain hole,
to keep the water from freezing, or refer to Table 7 and fill the evaporator with
antifreeze. Protect system to 10° F below the expected ambient temperature
and energize the evaporator heat tape(s) by closing the heat tape fused dis-
connect switch provided by the installer.
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