19
NOTE:
Failure of a heat exchanger due to lime
scale build-up on the heating surface, low pH or
other chemical imbalance is non-warrantable.
NOTE:
High chemical concentrates from feeders
that are out of adjustment will cause rapid corrosion
to the heat exchanger. Such damage is not covered
under the warranty.
CAUTION:
Combustion air must not be
contaminated by corrosive chemical fumes which
can cause unwarrantable damage to the heater.
FROM
FILTER
TO
POOL
CPVC, COPPER OR BRASS
AUTO LIMIT
(SET AT 110°F)
Fig. 18: Single Pool Heater Application
*Maximum 4 times the pipe diameter or 12”, whichever is less.
Winterizing Your Heater
Heaters installed outdoors as pool heaters in freezing
climate areas should be shut down for the winter. To
shut down the heater, turn off manual main gas valve
and main gas shut-off. Close isolation valves. Drain
the heater using the hose bibs located on the bottom
of both heat exchangers. Disconnect the condensate
hose from the stainless steel condensing heat
exchanger and drain the condensate trap.
CAUTION:
Combustion air must not be contami-
nated by corrosive chemical fumes which can
damage the heater and can cause unwarrantable
damage to the heater.
Pool Heating
When a boiler or water heater is used in a pool heat-
ing application, ensure that all the following installation
requirements are met.
The XTherm must be equipped with a direct coupled
Cold Water Run injector pump for pool applications.
The integral wet rotor injector pump system supplied
with all H and model 1005 WH XTherm heaters must
not be used for pool service. The direct coupled Cold
Water Run injector pump package is optional on all H
and 1005 WH models and standard on 1505 and 2005
WH and all P models. The Cold Water Run system
must be set to maintain 120°F at the inlet to the pri-
mary heat exchanger on all XTherm models.
To complete installation of the heater, the system sen-
sor must be installed in the return water line, upstream
of the heater. The supplied electronic operating con-
trol is configured to operate as the thermostat. A
separate auto limit is shipped loose to be installed in
the system piping downstream of the heater outlet.
See Fig. 18 for the thermostat/sensor location.
Install limit in supply to pool as shown in Fig. 18.
Automatic Chemical Feeders
All chemicals must be introduced and completely dilut-
ed into the water before being circulated through the
heater. High chemical concentrations will result when
the pump is not running (e.g. overnight).
WARNING:
To ensure safe operation of the
XTherm pool heater, all plumbing from the heater to
the main loop must be CPVC, copper or brass.
NOTE:
There are 3 separate drains on the XTherm
that must ALL be drained to protect the heat
exchangers. These are accessible by removing the
lower front door from the heater for the 2 primary
drains and the right-rear panel for the condensing
heat exchanger drain. Drain any piping of all water
that may experience below-freezing temperatures.
CAUTION:
Power to the heater should be
interlocked with the main system pump to make sure
the heater does not fire without the main system
pump in operation. Improper flow control can
damage the heater. Uncontrolled flow (too high) or
restricted flow (too low) can seriously damage the
heater. Follow these instructions to make sure your
heater is properly installed.
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