ETi 400 High Efficiency Pool and Spa Heater Installation and User’s Guide
Rev. A 9/2016
52
PRESSURE RELIEF VALVE (50 PSI)
(FACTORY INSTALLED)
To avoid water damage or scalding from operation of the pressure relief valve (see Figure 34), install a drain pipe in
the outlet of the pressure relief valve that will direct water discharging from the valve to a safe place for disposal. Do
not install any reducing couplings or valves in the drain pipe. The drain pipe must be installed so as to allow complete
drainage from the valve and drain line. The relief valve should be tested at least once a year by lifting the valve lever.
Figure 34.
WARNING
Explosion hazard.
Any heater installed with restrictive devices in the piping system downstream from the heater, (including
check valves, isolation valves, flow nozzles, or therapeutic pool valving), must have a relief valve installed as described
above.
Pressure Relief Valve
BURNER SPARK ELECTRODE AND FLAME SENSOR ROD
ANNUAL INSPECTION
The following maintenance is recommended every 12 months and at the start of every swimming season:
• The Thermal Insulation must be checked every 12 months, and if necessary be replaced. Inspect the Thermal Insulation
for signs of exterior damage to the device. It is recommended to call a qualified service technician to inspect the
Thermal Insulation.
0.2 - 0.22 in
0.22 - 0.26 in
Flame Sensor
Spark Electrode
0.08 - 0.1 in
Spark Electrode
(A) Burner Spark Electrode
(B) Flame Sensor Rod
Section 4: Maintenance and Care
