Adjustment; Pilot Burner Adjustment; Venturi Adjustment - Napoleon BHD4P Installation And Operating Instructions Manual

9.0 ADJUSTMENT

9.1

PILOT BURNER ADJUSTMENT

Adjust the pilot screw to provide properly sized fl ame. Turn in a
clockwise direction to reduce the gas fl ow.
Check Pressure Readings:
Inlet pressure can be checked by turning screw (A) counter-
clockwise 2 or 3 turns and then placing pressure gauge tubing
over the test point. Gauge should read as described on the chart
below. Check that main burner is operating on "HI".
Outlet pressure can be checked the same as above using screw
(B). Gauge should read as described on the chart below. Check
that main burner is operating on "HI".
AFTER TAKING PRESSURE READINGS, BE SURE TO TURN
SCREWS CLOCKWISE FIRMLY TO RESEAL. DO NOT OVER
TORQUE.
ELECTRODE
Leak test with a soap and water solution.
Prior to pilot adjustment, ensure that the pilot assembly has not
been painted. If overspray or painting of the pilot assembly has
occurred remove the paint from the pilot assembly, or replace.
Fine emery cloth or sandpaper can be used to remove the paint
from the pilot hood, electrode and fl ame sensor.
LA SONDE
DE FLAMME
ÉLECTRODE
9.2

VENTURI ADJUSTMENT

This appliance has an air shutter that has been factory set open according
to the chart below:
Regardless of venturi orientation, closing the air shutter will cause a more
yellow flame, but can lead to carbonization. Opening the air shutter will
cause a more blue flame, but can cause flame lifting from the burner ports.
The flame may not appear yellow immediately; allow 15 to 30 minutes for
the final flame colour to be established.
AIR SHUTTER ADJUSTMENT MUST ONLY BE DONE BY A QUALIFIED
INSTALLER!
PILOT
BURNER
FLAME
SENSOR
Natural Gas
Pressure
(inches)
*7"
Inlet
VEILLEUSE
(MIN. 4.5")
3.5"
Outlet
VENTURI ADJUSTMENT
FUEL
NG
P
A
3/8" - 1/2"
(9.5mm - 12.7mm)
ELECTRODE
(12.7mm) OF FLAME SENSOR
Natural Gas Propane
(millibars) (inches)
17.4mb
13"
(MIN. 11.2mb)
(MIN. 11")
8.7mb 10"
3/8" - 1/2"
(9.5mm - 12.7mm)
ÉLECTRODE
LA FLAMME DOIT ENVELOPPER
LA PARTIE SUPÉRIEURE DE LA
SONDE DE FLAMME DE 3/8"
(9.5mm) À 1/2" (12.7mm)
CHART
BHD4
1/16" (1.6mm)
5/16" (8mm)
B
PILOT SCREW
FLAME SENSOR
PILOT
BURNER
FLAME MUST ENVELOP
UPPER 3/8" (9.5mm) TO 1/2"
Propane
(millibars)
32.4mb
(MIN. 27.4mb)
LA SONDE DE FLAMME
24.9mb
39.7A
VEILLEUSE
VENTURI
BURNER
AIR
SHUTTER
OPENING
ORIFICE
49.1
W415-1285 / F / 12.21.16
47
EN