STA-RITE SRC400NA - Page 28

SECTION TWO – Heater Installation
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WW
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(See Figure 2-19)
For outdoor heaters in freezing climates, shut the heater
down and drain it for winter as follows:
1. Turn off electrical supply to the heater.
2. Close main gas control valve and manual gas valve
(located outside the heater).
3. Open drain plug located on the bottom of the mani-
fold, and drain the heat exchanger and manifold
adapter completely. If heater is below pool water
level, be sure to close isolation valves to prevent
draining the pool (isolation valves are not required
and should not be used on heaters installed above
pool water level). Assist the draining by blowing
out the heat exchanger through the pressure switch
fitting with low pressure compressed air (less than 5
PSI or 35 kPa).
4. Disconnect the compression fittings at both ends of
the copper tube connecting the pressure switch to
the manifold adapter and drain the tube and switch.
5. Drain the plastic inlet/outlet manifold through the
outlet pipe. If the pipe does not drain naturally to
the pool, install a drain cock in the outlet pipe to
drain the manifold.
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Water trapped in the heater can cause freeze
damage. Allowing the heater to freeze voids the
warranty.
To return the heater to service after winterizing:
1. Close drain cock and fittings.
2. Before starting the heater, c irculate water through
the heater for several minutes until all air noises
stop. See also “PRE-OPERATION CHECKLIST”
(Page 3-1) and “ROUTINE MAINTENANCE AND
PROFESSIONAL SERVICING” (Page 4-1).
2-19
Winterizing
PRE
SS
TAB
V
ENT
P
IL
O
T
O
F
F
OFF
O
N
ON
Open
Manual/Gas Valve OFF
Power
Combination Gas Control Valve OFF
Close Isolation Valves
Old Style:
Turn Clockwise
and press down
to turn off gas.
Drain Cock(s) and Plugs
OPEN
2704 1196
PRESS
TAB
VENT
PILOT
O
F
F
OFF
ON
ON
Remove Water Pressure
Switch to help Manifold
Drain
Outlet
Inlet
Drain Inlet/Outlet
Manifold
New Style:
Throw switch
to OFF
Figure 2-19: Winterizing
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::
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Explosion hazard. Purging the system
with compressed air can cause components to
explode, with risk of severe injury or death to any-
one nearby. Use only a low pressure (below 5 PSI),
high volume blower when air purging the heater,
pump, filter, or piping.