Lochinvar Hot Water Generator - Manual (Page 14)

14
5
Troubleshooting
Hot Water Generator Installation and Operation Manual
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Pressure relief valve
“pops”.
• The primary / inlet temperature control
valve is not closing properly.
• The secondary / outlet energy source
pressure control system is not
operating properly.
• The over-temperature limit system is
out of adjustment, or some component
of the system has failed.
• Verify control valve bulb was installed in
tank bulbwell.
• Verify control valve actuator is
operating properly.
• Check the individual components of the
system and repair or replace the failed
component(s) as necessary.
Water shuts down at or
too close to (above or
below) the design outlet
temperature. • The over-temperature limit system is
out of adjustment, or some component
of the system has failed.
• Check the individual components of the
system and repair or replace the failed
component(s) as necessary.
A loud banging in the
water heater,
primary
piping, or condensate /
water return piping (not
to be confused with a
normal clicking noise
made during operation).
• 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.
• Primary / inlet steam line is not
properly trapped (steam as energy
source only).
• 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.
• The steam supply should be clean dry
steam. Do not slug controls system
with boiler startup condensate. This
can damage controls as well as tube
bundle.