Part number 550-100-213/1220 7
MONTHLY
Maintenance
User maintenance procedures (continued)
CONDENSING GAS BOILER — USER’SINFORMATION Manual
Check vent & air piping
1. Visually inspect the flue gas vent piping and
air piping for any signs of blockage, leakage or
deterioration of the piping. Notify your quali-
fied service technician at once if you find any
problem.
Failure to inspect the vent/air sys-
tem as noted above and have them
repaired by a qualified service techni-
cian can result in vent system failure,
causing severe personal injury or
death.
Check the relief valve
1. Inspect the boiler relief valve and the relief valve
discharge pipe for signs of weeping or leakage.
2. If the relief valve often weeps, the expansion
tank may not be working properly. Immediately
contact your qualified service technician to
inspect the boiler and system.
Check the condensate drain
system
1. While the boiler is running,check the discharge
end of the condensate drain tubing and the
open top of the condensate tee at the boiler
(see Figure 3 for locations). Make sure no flue
gas is escaping from the condensate drain tub-
ing or tee by holding your fingers in front of
the opening.
2. If you notice flue gas escaping, this indicates a
dry condensate drain trap. See step 4 for pro-
cedure to fill trap. Call your qualified service
technician to inspect the boiler and condensate
line and refill the condensate trap if problem
persists regularly.
Under some circumstances, the vent
system may not produce enough
condensate to keep the condensate
trap full of liquid. If the trap is not
full, small amounts of flue products
can be emitted into the boiler room
through the condensate drain line
or tee. Follow procedure below to fill
trap.
3. Verify that the condensate drain line is unob-
structed by slowly pouring water into the top of
the PVC tee on the side of the boiler. The water
should run out the end of the condensate drain
line. If the water does not run out, call your
qualified service technician to inspect the boiler
and clean or replace the condensate drain line.
4. To fill the condensate trap, if necessary, tempo-
rarily plug the end of the condensate drain line.
Then slowly pour water into the ½ inch plastic
tee on boiler right side. Pour until water fills
drain line, then overflows into the boiler trap
tubing. When water fills up to top of ½ inch
tee, stop filling. Remove temporary plug from
end of condensate drain line.
Check automatic air vents (if
used — automatic air vents must be
used with diaghragm-type expansion
tanks only)
1. See Figure 4.
2. Remove the cap from any automatic air
vent in the system and check operation by
depressing valve “B” slightly with the tip of
a screwdriver.
Scald hazard — Water from air
vent may be very hot.Avoid contact
to prevent possible severe personal
injury.
3. If the air vent valve appears to be working
freely and not leaking, replace cap “A”, twist-
ing all the way on.
4. Loosen cap “A” one turn to allow vent to
operate.
5. Have vent replaced if it does not operate
correctly.
Check display date and time
1. Observe the date and time shown on page
11 (the Weil-McLain logo on the control
display).
2. If the date or time is incorrect, follow the
instructions in Figure 8, page 11 to access
the USER MENU and change the date and/
or time settings.
3. Keeping the date and time current makes sure
the control can record problems accurately.
Hose
clamps
Figure 3 Boiler condensate trap
Figure 4 Automatic air vent
