circulate water through the heater from the main sys- tem piping.
To complete the installation of the pool heater, the pool thermostat needs to be installed in the main return wa- ter line, upstream of the heater. This will ensure that the heater will be energized at the right time. If the main water line is too far away from the heater and the capillary bulb will not reach it, locate the pool thermo- stat adjacent to the main line and run wires back to the heater.
*
*Maximum 4 times the pipe diameter or 12”, whichever is less.
Fig. 14: Single Pool Heater Application
Adjustment of the manual bypass valve is critical to proper operation of the heater. The manual bypass valve should be adjusted to achieve a minimum inlet water temperature of 105°F and an outlet water tem- perature below 140°F. When starting with a cold pool, make initial adjustments. Make final adjustments when pool water approaches desired temperature.
The use of a bypass is required for proper operation in a pool heating application. Use the following instruc- tions to set the manual bypass:
1.Set Valve A (the bypass) to 1⁄2 open position, and Valve B to fully open position.
2.Turn on pump.
3.Turn on heater and wait until heater goes to full fire.
4.Adjust Valve A until the inlet water temperature is 105°F. NOTE: Opening the valve will increase the temperature and closing the valve will decrease the temperature.
5.If this process does not raise the inlet water tem- perature to 105°F and Valve A is fully open, then
slowly throttle Valve B closed to increase the inlet water temperature to 105°F.
Fig. 15: “H” Bypass Setting
Automatic Chlorinators and Chemical Feeders
CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty.
All chemicals must be introduced and completely di- luted into the pool or spa water before being circulated through the heater. Do not place chlorine tablets or bromine sticks in the skimmer. High chemical concen- trations will result when the pump is not running (e.g. overnight).
Chlorinators must feed downstream of the heater and have an
NOTE: High chemical concentrates from feeders and chlorinators that are out of adjustment will cause very rapid corrosion of the heat exchanger in the heater. Such damage is not covered under the warranty.
Winterizing Your Heater
Heaters installed outdoors in freezing climate areas should be shut down for the winter. To shut down heater, turn off manual main gas valve and main gas
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