Gas Control Valve; Pilot Burner Adjustment - Montigo H38DF Installation Operation & Maintenance

H38DF Gas Fireplace

Gas Control Valve

Pilot Adjustment Screw
Inlet
Pressure Manifold Pressure
Test Connection
Figure 30. Sit Nova 820 gas valve.

Pilot Burner Adjustment

1. Locate Pilot Adjustment Screw. (See figure 30.)
2. Adjust pilot screw to provide properly sized flame as shown in
figure 31).
3. After installing or servicing, leak test with a soap solution with main
burner on. Coat pipe and tubing joints, gasket etc. with soap solution.
Bubbles indicate leaks. Tighten any areas where the bubbles
appear until the bubbling stops completely.
Figure 31. Pilot Burner.
Troubleshooting
The following is a troubleshooting chart of possible problems:
PROBLEM
Noisy Pilot Flame Locate pilot adjustement screw on
gas control valve. Flame is decreased by
turning adjustment screw clockwise.
Pilot won't ignite Disconnect remote wires and try to light
pilot. If pilot now works, remote
connections are faulty. Check wiring
diagram figure 30.
Main burner will 1. Check wiring (see figure 30).
not light 2. Check wall switch for proper
connection.
Page 18
Maintenance
Power
Generator
Wall Switch
Spill Switch
H38DF
CORRECTIVE ACTION
Troubleshooting
HONEYWELL SV 9500 /SV9600
Troubleshooting Sequence
NOTE:
Before Troubleshooting, Familiarize Yourself With
The Startup And Checkout Procedure.
START
CHECK:
· Turn Gas Supply off
· Line voltage power
· Set thermostat to
· Low voltage transformer
call for heat
· Limit Controller
· Thermostat
SV9500/SV9600
NO
· Wiring
is powered
· Air proving switch on
(24 VAC nominal)
combustion air blower system
· Vent damper (if used) is open
and end switch made
YES Unplug Pilot Burner Cable,
Measure Voltage at
SV9500/SV9600 HSI
Terminals (24 VAC
NO
Nominal, See INSET)
Igniter warms up
and glows red.
Replace Igniter/
Flame Rod Assembly.
Pilot Valve opens.
NO
Replace SV9500/SV9600
YES
NO
Measure Voltage to SV9500
Turn gas on.
/SV9600. Voltage must
Pilot Burner lights?
be at least 19.5 VAC
YES
Replace Igniter/
Flame Rod Assembly.
NO
Replace Igniter/Flame
Main Valve opens?
Rod Assembly and retain.
Restart Troubleshooting
Sequence. Does main
YES
valve open?
SYSTEM OK
Discard old Igniter/
Flame Rod Assembly.
If your fireplace still does not operate correctly, consult your dealer or
the manufacturer.
All service and repairs should be performed by a qualified
agency.
All spare parts, optional fans, and optional trim finishes are available from
your local dealer or the manufacturer.
H38DF-I
INSET
HSI
Terminals
NO
Replace
SV9500/
SV9600
YES
Check
NO
Transformer
Line Volt
Supply
YES
Replace
NO
SV9500/
SV9600.
Save old
Igniter/Flame
Rod Assembly
YES
for service.
Part No. XG0131