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TROUBLESHOOTING
WARNING: If temperature and safety valve is leaking it must be replaced.
Visual aid reference at www.raritaneng.com/tech support/repair shop
PROBLEM CAUSE CORRECTION
A. Water does not
get hot.
B. Relief valve
opens and re-
leases hot wa-
ter.
C. Constant drip-
ping of relief
valve.
A1. No power at the heater.
A2.Malfunctioning heating
element or thermostat.
B1. Malfunctioning thermostat.
B2. If heat exchanger is in use,
the engine operating tem-
perature may be too high.
C1. Foreign matter lodged in the
seat of the relief valve.
C2. Check valve installed
incorrectly in cold water line.
A1. Be sure circuit breaker or switch is turned on and
wiring is not broken or disconnected.
A2. Check red RESET button. (See visual aid reference at
www.raritaneng.com/tech support/repair shop). Re-
move electrical access cover. If RESET button has
popped out, it must be reset by depressing it. Restore
power. If water is not warm within 30 minutes check
to be sure there is power at the thermostat. This can
be done by checking voltage at the top of the thermo-
stat, between the two top wires (on left and right side
of thermostat). If you get a reading, check for power
at the heating element. If power is available at heating
element, heating element is burned out. If power is
not available at heating element, replace thermostat.
B1. Check thermostat operation and replace it if bad. (See
visual aid reference at www.raritaneng.com/tech sup-
port/repair shop). Use qualified electrician if you
cannot determine whether or not thermostat is opera-
tional.
B2. If heater is equipped with a heat exchanger, and the
relief valve opens while engine is running, check your
setting andinstallation per Fig.#4.
C1. Replace relief valve (See visual aid reference at
www.raritaneng.com/tech support/repair shop).
C2. Check valve does not allow for the thermal expansion
of water. Replumb per Fig. #1 using expansion tank.
START - UP
WARNING: Be sure power to water heater is
off during start-up.
1. After all plumbing lines have been properly
installed and secured, open the hot water taps
and turn on the water pressure system.
2. Allow water to run a few minutes to expel air
from water heater and lines. Failure to expel air
may cause an air pocket in the tank. This will
cause the heating element to burn out, as it will
not be in contact with water. All the air may not
be expelled after purge, however over a period
of time (two weeks) the remaining air in the tank
will be absorbed by the water.
3. Check for leaks.
4. Replace electrical access cover and turn on
power.
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