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PILOT
ADJUSTMENT
Locate pilot adjustment cap on valve and remove.
See Figure 8.
Pilot flame should surround the top 3/8 to L/_, inch of powerpite or
thermocouple,
see Figure 9. To increase pilot flame, turn pilot
adjustment scre,a; see Figure 8, counterclockwise.
To decrease pilot
flame, mm screw clockwise. After a proper pilot flame is established
replace pilot adjustment cap, be sure gasket located on bottom of
cap head is in place.
The gas supply to the pilot is unregulated.
When line pressure exceeds 7" w.c. Natural Gas, 11" ,a_c. L.P. Gas,
pilot adjustment must be made.
TO REMOVE MAIN BURNER FOR
INSPECTION
AND CLEANING
1.
Remove outer casing.
2.
Disconnect gas supply to valve.
3.
Remove 11 screws holding burner door to heat exchanger and
lift out complete burner, valve assembly.
4.
After inspecting burner, place back into heat exchanger.
Be
sure door gasket is not damaged and will effect a proper seal or
pilot outage wilt occur.
5.
Tighten screws holding burner door to heat exchanger.
6.
Connect gas supply back to valve.
7.
Install fiont panel and follow lighting instructions.
NOTE: The furnace and all components must be inspected at least
annually by a qualified service person. This should include the
burner, heat exchanger, and vent system. Be sure that the flow
of combustion and ventilation air are not obstructed.
BURNER ORIFICE
This appliance is orificed at the factory for elevations up to 2,000 ft.
If installed above 2,000 ft., the BTU input must be reduced 4% per
1,000 ft. See the following orifice chart for the proper orifice for a
specific elevation.
NATURAL
GAS
SPECIFIC ELEVATIONS
MODEL
0 TO
2,000'
4,000'
6,000'
8,000'
_MBER
2.000'
4.000'
6.000'
8.000'
10.00'
CDV155B
48
49
50
51
52
CDV255B
2.45nml
41
42
43
44
CDV335B
2.75mln
37
38
40
42
ORDER KIT #49800 44-1 HIGH ALTITUDE KIT
L.P. GAS
SPECIFIC ELEVATIONS
MODEL
0 TO
2,000'
4,000'
6,000'
8,000'
NUMBER
2,000'
4,000'
6,000'
8,000'
10,00'
CDV156B
1.2mm
56
57
59
60
CDV256B
1.55mln
54
54
55
55
CDV336B
1.65mln
51
52
52
53
ORDER KIT #49800 44-1 HIGH ALTITUDE KIT
Pilot Adj. Screw
Pilot Adj. Cap
©
FIGURE 8
FIGURE 9
O
Pilot flmne should envelop
r"" 3/8" - 1/2" ofpowerpile
couple
I
I
WIR1NG DIAGRAM
Pilot Generator
Thermostat
Leads
Wire
WIR1NG DIAGRAM
I
CAUTION:
Label all wires prior to disconnec-
tion when servicing controls.
Wiring errors can
cause improper and dangerous
operation.
Verify
proper operation
after servicing.
Page 10
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