Instructions / Assembly
CHECK GAS PRESSURE
The minimum inlet pressure in the in the gas supply should be 11.0” for Propane Gas. The maximum inlet pressure
should never exceed 13.0”. This should be checked at the 1/8” inch N.P.T. plugged tapping in the supply line with a
manometer.
The manifold pressure for this appliance is 10.3” w.c. for Natural Gas. Check with a manometer at the pressure tap on
the control valve. To adjust pressure, remove cap from regulator and turn regulator adjustment screw on the control
valve. To adjust pressure, remove cap from regulator and turn regulator adjustment screw clockwise to increase
and counter clockwise to decrease pressure.
RATE VERIFICATION
Refer to the lighting and Operating Instruction Plate located in control area of furnace for instructions on lighting the pilot.
1. Make certain there is no gas flow through the meter other than to the appliance being checked. Other appliances
must remain off and the pilots extinguished (or their consumption deducted from the meter reading).
2. With gas control knob in “ON” position, cycle main burner on and off several times by means of thermostat o
stabilize pressure regulator valve (PRV) diaphragm.
3. With second hand on watch, carefully clock gas meter to determine exact rate of gas flow to main burner in cubic
feet per hour (see CONVERSION TABLE below).
4. Compare actual input with manufacturer’s recommended hourly input stamped on rating plate. Convert BTU per
hour input rating to cubic feet of gas per hour (cfh) by using the following formula.
Where as:
PRV = Pressure Input Rating in BTU per Hour = Cubic Feet of
Regulator Valve BTU Content of Gas per cu ft Gas per Hour
MJ= Megajoule Input Rating in MJ/hr = m3/hr
M3= Metric Cube MJ of Gas per m3
5. If actual gas flow (cfh) does not conform to manufacturer’s recommended input rating (cfh) of BTU converted to
cfh), a limited adjustment of the PRV may be made. Turn PRV adjusting screw clockwise to increase or
counter clockwise t decrease gas flow burner input must not exceed nameplate rating.
6. Replace cap screw in PRV adjustment stack. Turn gas supply to other appliances back on and re-light all pilots.
7. Place furnace in operation and observe through at least one complete cycle to be sure all controls are operating
satisfactorily.
CONVERSION TABLE
This table shows the gas flow rate for measured time per revolution of ONE CUBIC FOOT DIAL in
cubic feet per hour (cfh) and m3/hr.
TIME
Sec
FLOW
Cfh
FLOW
M3/hr
TIME
Sec
FLOW
Cfh
FLOW
Cfh
TIME
Sec
FLOW
Cfh
FLOW
M3/hr
40
90
2.55
56
64
1.81
88
41
1.16
41
88
2.50
57
63
1.78
92
39
1.10
42
86
2.44
58
62
1.76
96
38
1.08
43
84
2.38
59
61
1.73
100
36
1.02
44
82
2.32
60
60
1.70
105
34
.96
45
80
2.27
62
58
1.64
110
33
.93
46
78
2.21
64
56
1.59
115
31
.88
47
77
2.18
66
54
1.53
120
30
.85
48
75
2.12
68
53
1.50
125
29
.82
49
73
2.07
70
51
1.44
130
28
.79
50
72
2.04
72
50
1.42
135
27
.76
51
71
2.01
74
49
1.39
140
26
.74
52
69
1.95
76
47
1.33
150
24
.68
53
68
1.93
78
46
1.30
160
23
.65
54
67
1.90
80
45
1.27
170
21
.59
55
65
1.84
84
43
1.22
180
20
.57
For ½ cu. ft. per revolution of meter dial, multiply flow rate by 2.
For 2 cu. ft. per revolution of meter dial, divide flow rate by 2.
IMPORTANT: LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.