HTP Munchkin Boiler Residential - Manual (Page 7)

6
GAS -FIRED BOILER
User Manual
SECTION III – MAINTENANCE PROCEDURES
(CONT’D)
be removed immediately or the combustion
air intake must be relocated to another area.
Check Combustion Air Inlets
Verify that the unit’s vent termination and
combustion air intake are clean and free of
obstructions. Remove any debris on the air
intake or flue exhaust openings. If removing
the debris does not allow the unit to operate
correctly, contact your qualified service
technician to inspect the unit and the vent /
combustion air system.
Check Temperature display and Pressure
Gauge
1. Ensure the pressure reading on the pressure
gauge does not exceed 25 psig. Higher
pressure readings may indicate a problem
with the expansion tank.
2. Ensure the temperature on the LED display
panel does not exceed 180ºF. Higher
temperature readings may indicate a
problem with the operating thermostat
controls.
3. Contact a qualified service technician if
problem persists.
MONTHLY MAINTENANCE
Check Vent Piping
1. Visually inspect the flue gas vent piping for
a n y s i g n s o f b l o c k a g e , l e a k a g e o r
deterioration of the piping. Notify a qualified
service technician immediately if any
problems are found.
Check Intake Air Vent Piping
1. Visually inspect the intake air vent piping for
any signs of blockage. Inspect the entire
length of the intake air vent piping to ensure
piping is intact and all joints are properly
sealed.
2. Notify a qualified service technician if any
problems are found.
Check Pressure Relief Valve
1. Visually inspect the primary pressure relief
valve and the relief valve discharge pipe for
signs of weeping or leakage.
2. If the pressure relief valve often weeps, the
expansion tank may not be operating
properly. Immediately contact a qualified
service technician to inspect the unit and
system.
Check Vent Condensate Drain System
1. While the unit is running, check the discharge
end of the condensate drain tubing. Ensure
no flue gas is leaking from the condensate
drain tubing or tee connection by holding
your fingers near the opening.
2. If you notice flue gas leaking from the
opening, this indicates a dry condensate
drain trap. Fill the condensate trap assembly.
Contact a qualified service technician to
inspect the unit and condensate line and refill
the condensate trap if problem persists
regularly.
3. The Service Technician must ensure the
condensate drain line is not blocked by
pouring water through the plug T fitting on
the condensate drain assembly. The water
should flow out of the end of the drain line. If
water does not appear at the end of the drain
line, the qualified service technician must
clean the condensate line.
4. To fill the condensate drain assembly. Slowly
pour water into the T fitting on the assembly
until water appears at the end of the drain
line.
WARNING
Failure to inspect the venting system as noted
and have it repaired by a qualified service
technician can result in the vent system failure,
causing severe personal injury or death. WARNING
You must make sure the condensate hose is
securely fastened before restarting boiler. Do a
final check to assure proper flow.