Troubleshooting – Lochinvar Hot Water Generator User Manual
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5
Troubleshooting
Hot Water Generator Installation and Operation Manual
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Water heater does not
maintain the required
temperature at the rated
capacity.
• The thermometer is not correctly
sensing the water temperature.
• Inlet energy source pressure is too
low or boiler water temperature is too
low.
• The condensate / water return piping
has not been installed properly,
allowing the condensate / water to
drain freely (by gravity); the
condensate / water drain line is
restricted; or the condensate / water
check valve is leaking or has failed.
• Water bypass valve has not been
adjusted (boiler water).
• Control valve bulb not installed or not
properly installed in tank bulbwell.
• Control valve actuator defective.
• Check the water temperature with a
temperature gauge that is known to be
correct. Replace the thermometer if it
is found to be incorrectly sensing the
water temperature.
• Check the primary energy source
pressure/temperature. If the reading is
low, adjust the inlet pressure/temperature to
meet the design requirements. If there is a
restriction in the primary energy source
line, the pressure reading will drop
excessively when the generator calls
for full energy on steam systems, even
though the pressure seems to be
normal during light demand. If the
primary pressure is correct, the system
should reach design pressure for
energy source in the tube bundle as the
temperature of the water in the tank
heater approaches shutoff.
• Reconfigure the condensate / water
return piping and check valve to allow
for proper drainage. Check to assure
that there is no restriction in the
condensate / water drain line. Replace
the check valve if it is leaking or has
failed. Also, check to assure that there
is no restriction in the condensate /
water drain line.
• Adjust bypass valve approximately half
closed. Readjust as necessary.
• Notify factory for replacement.
• Verify actuator is not working. Notify factory
for replacement.
Outlet temperature is too
high.
• The thermometer is not correctly
sensing the water temperature.
• The condensate / water return piping
has not been installed properly,
allowing the condensate / water to
drain freely (by gravity); the
condensate / water drain line is
restricted; or the condensate / water
check valve is leaking or has failed.
• Control valve bulb not installed or not
properly installed in tank bulbwell.
• Control valve actuator defective.
• Check the water temperature with a
temperature gauge that is known to be
correct. Replace the thermometer if it
is found to be incorrectly sensing the
water temperature.
• Reconfigure the condensate / water
return piping and check valve to allow
for proper drainage. Check to assure
that there is no restriction in the
condensate / water drain line. Replace
the check valve if it is leaking or has
failed. Also, check to assure that there
is no restriction in the condensate /
water drain line.
• Verify bulb is installed in bulbwell.
• Verify actuator is not working. Notify factory
for replacement.