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Issue 2 14/07/16
6
Servicing
6.16 Combined temperature/pressure relief valve
6.17 Combustion system inspection
At least twice a year, the temperature and pressure relief valve
should be checked to ensure that it is in operating condition. To
check the relief valve, lift the lever at the end of the valve
several times. The valve should sit properly and operate freely.
If water does not flow, remove and inspect for obstructions or
corrosion. Replace with a new valve of the recommended size
as necessary. A thorough inspection of the valve should be
performed at least every three years by removing the
temperature and relief valve from the tank. Do not attempt to
repair the valve as this could result in improper operation and a
tank explosion. In areas with poor water conditions, it may be
necessary to inspect the T&P valve more often than the
recommended maintenance schedule.
If the temperature and pressure relief valve on the water heater
discharges periodically or continuously, it may be due to
thermal expansion of water in a closed water supply system or
due to a faulty relief valve.
Thermal expansion is the normal response of water when it is
heated. In a closed system, thermal expansion will cause the
system pressure to build until the relief valve actuation pressure
is equalled. The relief valve will then open allowing some water
to escape, slightly lowering the pressure.
Inspect the operation of the combustion system monthly. Use
the following procedure to inspect the combustion system.
1. Turn off the main power switch of the water heater.
2. Adjust the thermostat to the Min. setting.
3. Remove the top of the combustion surround by unlatching it.
4. While observing the ignition module, turn on the main power
switch.
5. Adjust thermostat to the Max. setting.
6. Watch the LED’s light as the controller goes through the
S-OP as previously described.
7. Upon ignition, observe the main burner flame.
8. Readjust thermostat to previous setting.
9. Replace combustion surround top and latch it securely in
place.
Caution
Before manually operating the valve, make sure that a
drain line has been attached to the valve to direct the
discharge to an open drain. Failure to take this
precaution could mean contact with extremely hot water
passing out the valve during this checking operation..
Summary of Contents for ECOflo EC230/600
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