ETi 250 High Efficiency Pool and Spa Heater Installation and User’s Guide
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6. 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.
7. Use a blower to remove all remaining water in the heater.
8. Cover air inlet grate with a plastic bag to prevent bugs, leaves, etc., from getting into the heater.
NOTICE: Water trapped in the heater can cause freeze damage. Allowing the heater to
freeze voids the warranty.
RETURN THE HEATER TO SERVICE
MAINTAINING POOL TEMPERATURE
To maintain pool temperature, make sure that the heater switch and valving are reset to pool settings after using the spa.
ENERGY SAVING TIPS
1. Keep the pool or spa covered when not in use. This will reduce heating costs, reduce water evaporation, conserve
chemicals and reduce load on the ltering system.
2. Reduce pool thermostat to 78° F (25° C) or lower; reduce spa temperature to 100° F (38° C). This is accepted as being
the most healthy temperature for swimming by the American Red Cross.
3. Use a time clock to start the lter pump at 6 a.m. or later. The swimming pool loses less heat after daybreak.
4. For pools used only on weekends, lower the thermostat setting by 10° F to 15° F (5° C to 8° C) during the week to
reduce heat loss. A properly sized heater will restore normal temperature within one day.
5. Turn the heater off when the pool will not be used for an extended period.
6. Follow a regular program of preventive maintenance for the heater each new swimming season. Check operation of
the heater and its controls.
Removal of Condensate Cartridge in Freezing Temperatures
If the ETi 250 heater is installed outdoors and must operate in below freezing temperatures (32° F/0° C or below), to
prevent freezing of the condensate line, the condensate neutralizer cartridge located inside the heater must be removed.
First remove the condensate cartridge and store it. Run the condensate hose to the outside of the heater sloping downward
at all times.
Note: The condensate neutralizer cartridge should be reinstalled on the heater in the Springtime when outdoor
temperatures are above freezing point.
To return the heater to service after winterizing:
1. Connect the INLET and OUTLET unions to the system plumbing, see page 20 and 22. Check that they are connected
correctly and there are no water leaks.
2. Reinstall the WATER PRESSURE SWITCH in the CPVC plumbing inlet assembly. See page 13.
3. Place the DRAIN PLUG back into the port at the manifold assembly.
4. Before starting the heater, circulate water through the heater for several minutes until all air noises stop. Also see
BEFORE START-UP (page 13) and CARE AND MAINTENANCE (page 59). See additional notes on page 13.
Maintenance and Care
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