STA-RITE SR200NA Service Manual page 28

SECTION TWO – Heater Installation
Winterizing
W W W W i i i i n n n n t t t t e e e e r r r r i i i i z z z z i i i i n n n n g g g g
(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
Power
Figure 2-19: Winterizing
Old Style:
Turn Clockwise
and press down
to turn off gas.
Manual/Gas Valve OFF
N T
VE
S
ES
PR
B
TA
T
PI LO
2704 1196
Open
Drain Cock(s) and Plugs
OPEN
2-19
the pool, install a drain cock in the outlet pipe to
drain the manifold.
N N N N O O O O T T T T E E E E : : : : 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, circulate 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).
S S S S a a a a f f f f e e e e t t t t y y y y P P P P r r r r e e e e c c c c a a a a u u u u t t t t i i i i o o o o n n n n s s s s : : : :
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.
Combination Gas Control Valve OFF
N T
V E
S
E S
P R
B
T A
O T
P IL
Remove Water Pressure
Switch to help Manifold
Drain
Drain Inlet/Outlet
Manifold
Inlet
Outlet
Close Isolation Valves
New Style:
Throw switch
to OFF