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1. The time clock must be in the "ON" position.
2. Your pump strainer basket may be full.
remove debris.
3. Your water filter may be dirty. If so, backwash or
clean filter. (To tell if your filter is dirty, look to see
if the filter pressure will be higher than usual).
4. The pump may have lost its prime and be running
dry. Check the pressure on the filter. If there is no
pressure; then you are not moving water (or your
gauge is broken). Try to get the pump to run at its
normal flow rate.
POOL & SPA WATER CHEMISTRY
Chemical imbalance can cause severe damage to
your heater and associated equipment. Maintain
your water chemistry according to the chart on page 2.
If the mineral content and dissolved solids in the water
become too high, scale forms inside the heat exchang-
er tube, reducing heater efficiency and damaging the
heater. If the pH drops below 7.2, this will cause cor-
rosion of the heat exchanger and severely damage the
Heat exchanger damage resulting from
heater.
chemical imbalance is not covered by the warran-
ty.
AUTOMATIC CHLORINATORS AND
CHEMICAL FEEDERS
All chemicals must be introduced and completely dilut-
ed into the pool or spa water before being circulated
through the heater. Do not place sanitizing chemicals
in the skimmer.
High chemical concentrations will
result when the pump is not running (e.g. overnight).
Chlorinators must feed downstream of the heater and
have an anti-siphoning device to prevent chemical
back-up into the heater when the pump is shut off. A
check valve should be installed between the heater
outlet and the chlorinator.
See plumbing diagrams on page 30 and 31.
NOTE: High chemical concentrates from feeders and
chlorinators that are out of adjustment will cause rapid
corrosion of the heat exchanger. Such damage is
not covered under the warranty.
COLD WEATHER OPERATION
IMPORTANT FREEZE INFORMATION
If so,
MODERATE CLIMATE: Heater operation can con-
tinue during short-term cold spells. When tempera-
tures are between 0°F (-17ºC) and 32°F (0ºC), 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 heater is 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 (10ºC) is not recommend-
ed. When starting the heater with water temperatures
below 50°F (10ºC), operate the heater continuously
until higher temperatures are reached. Operating the
heater for prolonged periods with pool water below
50°F (10ºC) can seriously damage the heater, and is
not covered by the warranty.
For cold climate areas, please follow the winterizing
procedures listed.
WINTERIZING THE POOL & SPA HEATER
Heaters installed outdoors in freezing climate areas
may be shut down for the winter. Observe the follow-
ing procedure for winterizing the heater:
1. Turn off gas valve, manual gas valve, and electri-
cal supply to the heater.
2. Disconnect the field supplied condensate drain line
from the condensate trap located below the
inlet/outlet water connections.
3. Remove the access panel below the inlet/outlet
water connections and connect a hose to the drain
valve. Direct the hose discharge to a safe drainage
location.
4. Open the drain valve and pull the PRV handle or
open the union at the water outlet connection to
allow the heater to drain.
5. Close the drain valve and disconnect the hose.
6. Remove the cap from the condensate trap.
Disconnect, remove and drain the condensate trap
and then re-intstall it.
7. Re-install the lower access panel and re-attach the
condensate drain line to the trap.
8
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