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DIRECT-VENT FIREPLACE (NATURAL/PROPANE)
OPERATING
FIREPLACE
Continued
OPERATING
OPTIONAL GWMT1
WALL MOUNTED
THERMOSTAT
WARNING: Do not connect
the thermostat to a power source.
Electrical shock and/or a fire haz-
ard will occur.
Light the fireplace as instructed in Light-
ing Instructions on page 26. Set wall ther-
mostat to desired temperature.
This thermostat has been electronically
calibrated at the factory and requires no
adjustment or leveling.
Upon installation, the thermostat must
be allowed to stabilize at room tempera-
ture for a minimum of 30 minutes for
proper operation.
To turn the fireplace off, adjust thermo-
stat to the lowest setting and turn the gas
control knob back to PILOT. The pilot
will remain lit.
IMPORTANT: To turn the pilot off, turn
the control knob on the heater to the OFF
position.
®
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT ASSEMBLY
The pilot assembly is factory preset for the
proper flame height. Alterations may have
occurred during shipping and handling. Call
a qualified service person to readjust the
pilot if necessary.
The height of the thermopile must be 3/8" to
1/2" above the pilot flame as shown in Figure
61. The thermocouple must be at a height of
about 1/8" above the pilot flame. The flame
from the pilot burner must extend beyond
both the thermocouple and thermopile.
If your pilot assembly does not meet these
requirements:
• turn fireplace off (see To Turn Off Gas to
Appliance, page 26)
• see Troubleshooting, pages 30 through 32
/
Thermopile
3/8" to 1/2"
Pilot Burner
Piezo
Ignitor
Figure 61 - Pilot Assembly
28
BURNER FLAME PATTERN
Burner flames will be steady; not lifting or
floating. Flame patterns will be different
from unit to unit and will vary depending on
installation type and weather conditions.
If the vent configuration is installed incor-
rectly, the flames will lift or "ghost". This
can be dangerous. Inspect the flames after
installation to ensure proper installation and
performance.
Figure 62 shows a typical flame pattern for
HDV37N/P(A,B), and HDV41N/P(A,B)
models. Figure 63 shows a typical flame
pattern for BHDV37N/P(A,B), and
BHDV41N/P(A,B).
If burner flame pattern differs from that
described:
• turn fireplace off (see To Turn Off Gas to
Appliance, page 26)
• see Troubleshooting, pages 30 through 32
1/8"
Figure 62 - Typical Flame Pattern for
Thermocouple
HDV37N/P(A,B) and HDV41N/P(A,B)
Figure 63 - Typical Flame Pattern for
BHDV37N/P(A,B) and BHDV41N/P(A,B)
105540
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