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PILOT
ADJUSTMENT
Locate the pilot adjustment screw on the valve. The
pilot flame should surround at least the top 3/8" of the
powerpile (pilot generator) or flame sensor (see Figure
7). The pilot is unregulated so it will be operating at
inlet line pressure (Max. 7" w.c. for Natural Gas and
11" w.c. tbr Propane).
To decrease the pilot flame,
turn the screw clockwise
_
(approximately six full
turns to bottom ofpitot light channel) until you produce
sufficient flame at the minilnum noise level.
PILOT FLAME ADJUSTMENT: Pilot tlame
should envelop 3/8 to 1/2 inch of the tip of sensor.
._3/8"
to 1/2"
FIGURE 7A
STANDING
PILOT
"---'4-to
I
i[
1/2"
FIGURE-7B
I.I.D.
PILOT
Pilot Adj. Screw
-
ROBERTSItAW
7200ER-SO4
FIGURE 7C
STANDING
PILOT
Pilot Adj. Screw
IN -
ROBERTSItAW
7200IPER-SO4
FIGURE 7D
I.I.D.
PILOT
[-1/ 01
3/4
FIGURE 8
TO REMOVE
MAIN
BURNER
FOR
INSPECTION
AND CLEANING
1.
Turn thermostat to lowest setting and allow furnace to cool.
2.
Turn off all electric power to furnace.
3.
Remove lower mille.
4.
Disconnect gas supply to valve.
5.
Disconnect wires from gas vane.
6.
Remove 15 screws holding burner door to burner box. Pull
door tbrward to remove complete burner, gas valve assembly.
7.
After inspecting and cleaning, place burner assembly back
into burner box and tighten 15 screws. NOTE: Be sure door
gasket is not damaged and will effect a proper seal or pilot
outage will occur.
8.
Connect wires back to valve.
9.
Connect gas supply back to valve.
10. Turn on electric to furnace.
11. Follow lighting instructions, and replace lower _ille.
It is recommended that the furnace and all components be inspected
at least annually by a qualified service person. This should include
the burner, pilot, heat exchanger, and vent system. Be sure that
the flow of combustion and ventilation air is not obstructed.
IMPORTANT:
Keep burner and control compartment
clean.
Vacuum control compartment
at the start of the heating season
and as often as needed.
PROPER
BURNER
FLAME
The burner flame may be observed by raising the sight glass cover.
A proper flame will have a dark blue inner mantle that sits right
on top of the burners with a lighter blue outer mantle rising above
the burner (See Figure 8). There may be some yellow where the
pilot flame and burner flame meet.
There is no primary
air
adjustment on the burner, and proper flame is assured since the
correct manifold pressure and orificing has been done at the factory.
NOTE:
It is advised that the burner flames be checked at least
twice during the heating season t\_r any changes in burner flame
characteristics.
The appliance area must be kept clear and tree
from combustible materials, gasoline, and other flammable vapors
and liquids. This heater comes fioln the factory with the proper
burner orifice for elevations up to 2,000 feet. Heaters installed
above 2,000 feet must be derated 4% for every 1,000 feet. For the
proper orifice size, find the Model Nmnber and elevation on the
orifice chart. Replace burner orifice.
NATURAL
GAS
MODEL
0 to
2000 -
4000 -
6000 -
8.000
NI_4BER
2 000'
4 000'
6 000'
8 000'
I0 000'
DVCF403B
32
34
35
36
40
DVCF407B
32
34
35
36
40
DVCF557B
3.6m
29
30
30
31
DVCF653B
25
27
28
29
30
ORDERKIT#49840 2287-1HIGHALTITUDE KIT
L.P. GAS
MODEL
0 to
2.000-
4.000-
6.000-
8.000
iXXEVIBER
2.000'
4000'
6000'
8000'
10.000'
DVCF404B
49
50
51
52
52
DVCF408B
49
50
51
52
52
DVCF558B
44
45
47
48
49
DVCF654B
2.3n_n
44
45
47
48
[
ORDER KIT #49840 2287-1 HIGH ALTITUDE KIT
Page 10
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