Weil-McLain GOLD CGa Installation And Maintenance Manual page 50

GOLD
11a
Troubleshooting —
Check the following:
1. Wire connectors to control module are securely
plugged in at module and originating control.
2. Gas pressures:
a. With boiler off — 13" w.c. maximum natural or
b. With boiler on:
In event of vent damper failure:
Effikal vent damper
If troubleshooting chart recommends replacing actuator
and actuator is not immediately available, damper blade
can be fixed in an open position to allow boiler
operation. Manually turning blade can cause actuator
damage. Follow these instructions only in case of no
heat or damper actuator malfunction.
1. Move damper service switch to
position. Apply call for heat to boiler. Damper blade
should then rotate to open position and boiler will
fire.
Figure 28
Manually opening
vent damper
• Verify proper operation after servicing. • See vent damper manufacturer's instructions packed with vent damper for
additional information. Failure to comply could result in severe personal injury, death or substantial property damage.
50
CGa Gas-Fired Water Boiler
propane gas pressure upstream of gas valve.
• 5" w.c. minimum natural gas pressure or 11"
w.c. propane gas pressure upstream of gas
valve.
• 3.5" w.c. minimum natural gas pressure or
10" w.c. propane gas pressure downstream
tapping on gas valve — Can be adjusted by
regulator on gas valve.
Hold Damper Open
Effikal
damper
procedure
2. If step 1 does not open damper, manually rotate
damper blade to open position using wrench or
pliers on flat shaft between damper and actuator.
Boiler will fire. Verify that damper service switch is
in
Hold Damper Open
3.
Do not leave vent damper permanently in this
Replace actuator immediately. If vent
position.
damper is left in open position, boiler will not
operate at published efficiencies.
Johnson Controls vent damper
If troubleshooting chart recommends replacing actuator
and actuator is not immediately available, damper blade
can be fixed in an open position to allow boiler
operation. Follow these instructions only in case of no
heat or damper actuator malfunction. See
1. Turn off power to boiler.
Failure to turn off power to boiler
can result in severe personal injury,
death or substantial property
damage.
2. Refer to vent damper manufacturer's instructions
for procedure to fix vent damper in open position.
3. Turn on power to boiler.
4. Using wrench or pliers on flat shaft section, manually
rotate damper blade until green light turns on. Boiler
will fire. (
Figure 28
5. Do not leave vent damper permanently in this
position. Replace actuator immediately. If vent
damper is left in open position, boiler will not
operate at published efficiencies.
Open
Closed
Damper blade
indicator
Wrench or pliers
continued
position. ( )
Figure 28
Figure 28
)
Johnson Controls
damper
Part Number 550-110-593/1099
.
59303