Monessen Hearth HBDV400N/PSC7 - Manual (Page 46)

HBDV7 Series Direct Vent Gas Fireplace
46 54D8000
LG752
HBDV log flames
CleANING and MAINteNANCe
W
ARNING
turn off gas before servicing fireplace. It
is recommended that a qualified service
technician perform these check-ups at the
beginning of each heating season.
BuRNeR, PIlot AND CoNtRol CoMPARt-
MeNt
Keep the control compartment, logs, and burner areas
surrounding the logs clean by vacuuming or brushing at
least twice a year. Make sure the burner porting, pilot air
opening and burner air opening are free of obstructions
at all times.
PIlot FlAMe
The flames from the pilot should be visually checked as
soon as the heater is installed and periodically during
normal operation. the pilot flame must always be pres-
ent when the fireplace is in operation. Figure 69. The
pilot flame has three distinct flames, one engulfing the
thermopile, one engulfing the thermocouple or sensor, and
the other reaching to the main burner.
BuRNeR
Inspect area around the injector. Remove any lint or foreign
material with a brush or vacuum.
BuRNeR FlAMe
The flames from the burner should be visually checked
as soon as the heater is installed and periodically during
normal operation. In normal operation, at full rate, and after
operating for about 15 to 30 minutes, the flame should be
yellow and slightly taller than the rear log. Figure 70
If the flame is blue and only in the center, turn off unit and
allow to cool. After unit is cool, remove logs and check to
make sure the back holes in the burner are not covered
with rock wool. If the back holes are clear, add more rock
wool to the center of the burner. Replace logs.
Note: The type of installation, vent system configuration,
and wind effects may cause the flame patterns to vary.
Figure 70 -
Burner Flame Appearance
LG75
FP1943
pilot flame
Thermopile
Thermocouple
FP1943
Millivolt Control
Pilot
Figure 69 -
Pilot Flame
FP2453
hooded pilot flames
Sensor
Thermopile
FP453
Signature
Command
System Pilot