Raypak VERSA 155C - Manual (Page 8)

COLD WEATHER OPERATION
MODERATE CLIMATE: Heater operation can con-
tinue during short term cold spells. When temperatures
are below freezing flow, (continuous pump operation)
must be maintained.
CAUTION: Do not use the heater to maintain water
temperatures just above freezing or for freeze protec-
tion. When heaters are used during freezing weather,
care must be taken to avoid freeze ups. Continuous
pump operation is a must. Additional protection may be
required. The heater is not warranted against freeze
ups.
COLD CLIMATE: Prolonged operation with water
temperatures below 50°F is not recommended. When
starting the heater with pool temperatures below 50°F,
operate the heater continuously until higher tempera-
tures are reached. Operating the heater for prolonged
periods with pool water below 50° can seriously dam-
age the heater, and is not covered by the warranty. For
cold climate areas please follow the winterizing proce-
dures listed .
WINTERIZING THE POOL & SPA HEATER
When heaters installed outdoors in freezing climate
areas are to be shut down for the winter, observe the
following step-by-step procedure:
1. Turn off gas valve, manual gas valve, and electri-
cal supply to the heater.
2. Open drain cock located on the inlet/outlet header,
(under water pipes). Tilt heater to completely
drain all the water from the heat exchanger.
PRESSURE SWITCH
COMPRESSION FITTING
RETURN HEADER
Fig. # 8955
3. Disconnect compression fittings from the pressure
switch and return header that connects to the 1/4"
copper tube and allow the tube to drain.
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