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CONDENSING GAS BOILER
User maintenance procedures
MONTHLY
Maintenance
Part number 550-100-213/1220
—
Check vent & air piping
1. Visually inspect the fl ue gas vent piping and
air piping for any signs of blockage, leakage or
deterioration of the piping. Notify your quali-
fi ed service technician at once if you fi nd any
problem.
Failure to inspect the vent/air sys-
tem as noted above and have them
repaired by a qualifi ed 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 qualifi ed 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 fl ue
gas is escaping from the condensate drain tub-
ing or tee by holding your fi ngers in front of
the opening.
2. If you notice fl ue gas escaping, this indicates a
dry condensate drain trap. See step 4 for pro-
cedure to fi ll trap. Call your qualifi ed service
technician to inspect the boiler and condensate
line and refi ll 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 fl ue products
can be emitted into the boiler room
through the condensate drain line
or tee. Follow procedure below to fi ll
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
qualifi ed service technician to inspect the boiler
and clean or replace the condensate drain line.
4. To fi ll 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 fi lls
drain line, then overfl ows into the boiler trap
tubing. When water fi lls up to top of ½ inch
tee, stop fi lling. Remove temporary plug from
end of condensate drain line.
U
'
I
Manual
SER
S
NFORMATION
(continued)
Figure 3
Check automatic air vents
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.
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.
Figure 4
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.
Boiler condensate trap
Hose
clamps
Scald hazard
— Water from air
vent may be very hot. Avoid contact
to prevent possible severe personal
injury.
Automatic air vent
A
B
85036
(if
7
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