User Guide
User’s Information Manual
9
Part Number 550-110-592/0709
Figure 4
Automatic air
vent
Automatic air vents (if used)
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, twisting 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.
Pilot burner flame
Proper pilot flame (see Figure 5):
1. Blue flame.
2. Inner cone engulfing thermocouple or thermopile
(standing pilot) or pilot flame sensor (spark-ignited
pilot).
3. Thermocouple or thermopile, or pilot flame sensor
glowing cherry red.
Improper pilot flame:
1. Overred—Largeameliftingorblowingpastpilot
flame sensor.
2. Underred—Smallame.Innerconenotengulng
pilot flame sensor.
3. Lackofprimaryair—Yellowametip.
4. Incorrectly heated pilot flame sensor.
Main burner flame
Proper main burner flame (see Figure 6):
1. Yellow-orangestreaksmayappear(causedbydust).
Improper main burner flame:
1. Overred—Largeames.
2. Underred—Smallames.
3. Lack of primary air — Yellow tippingon ames
(sooting will occur).
Figure 5 Pilot burner and flame, typical
Figure 6 Main burner flame, typical
❏ Check monthly . . . . . . . . . . . . . . . .
Clean vent termination & air
intake screens — CGs boilers only
1. Remove all lint and debris from both the boiler air
intake screen and the flue discharge screen.
The boiler control module will sense blockage of
the air intake or flue and lockout if the blockage
is excessive. It will signal the failure by flashing the
appropriate indicator lights on the control board.
2. If removing the debris does not allow the boiler to
operate correctly afterwards, contact your qualified
service technician to inspect the boiler and vent/air
systems.
Check condensate drain
system
1. Inspect condensate drain fittings and tubing. Verify
that condensate can flow freely to drain.