6
Maintenance Procedures
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 per-
sonal injury or death.
Check Combustion Air Inlet Piping
1. Visually inspect the combustion air inlet piping for
any signs of blockage. Inspect the entire length
of the combustion air inlet piping to ensure piping
is intact and all joints are properly sealed.
2. Notify a qualified service technician if any prob-
lems 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 techni-
cian to inspect the unit and system.
Check Condensate Drain Trap Assembly
1. Ensure condensate drain trap assembly is firmly
secured to bottom of heat exchanger/unit. See Fig. 1.
Do not operate CHALLENGER without condensate
drain trap assembly firmly installed on unit and filled
with water. If the trap is not installed and full of water
flue gases can be emitted into the surrounding area
causing severe personal injury or death.
2. While the appliance is operating, check the dis-
charge end of the condensate drain tubing. Ensure
no flue gas is leaking from the condensate drain
tubing by holding your fingers near the opening.
3. If you notice flue gas leaking from the opening,
this indicates a dry condensate drain trap. Fill
the condensate trap assembly. Contact a quali-
fied service technician to inspect the appliance
and condensate line and refill the condensate
trap if problem persists regularly.
4. Ensure the condensate drain line is not blocked by
pouring water through the condensate drain
assembly. The water should flow out of the end of
WARNING
WARNING
the drain line. If water does not appear at the end
of the drain line, contact a qualified service techni-
cian to inspect and clean the condensate line.
5. To fill the condensate drain assembly, if neces-
sary, slowly pour water into the top of the trap
assembly until water appears at the end of the
drain line. Stop filling.
Check Automatic Air Vents (If Used)
1. Remove the cap “A” from any automatic air vent
in the system and check operation by depress-
ing valve “B” slightly with the tip of a screwdriv-
er. See Fig. 2.
2. If the air vent valve appears to be working freely
and not leaking, replace cap “A”, screwing it on
fully.
3. Have the air vent replaced by a qualified service
technician if it does not operate correctly.
Condensate Drain
Trap Assembly
Fig. 1: Condensate Drain Trap Assembly
A
B
Fig. 2: Automatic Air Vent
