Gas Pressure Adjustment - Lennox G61MPV?36B?045 Installation Instructions Manual

HONEYWELL VR8205 SERIES GAS VALVE
HIGH FIRE
ADJUSTING SCREW
(under cap)
LOW FIRE
ADJUSTING SCREW
(under cap)
INLET PRESSURE TAP
GAS VALVE SHOWN IN OFF POSITION
FIGURE 60
8 − White Rodgers 36E Gas Valve − Move gas valve switch
to ON. See figure 59 for the White Rodgers 36E
valve.
Honeywell VR8205 Gas Valve − Turn switch on gas
valve counterclockwise
9 − Replace the upper access panel.
10− Turn on all electrical power to to the unit.
11− Set the thermostat to desired setting.
NOTE − When unit is initially started, steps 1 through 11
may need to be repeated to purge air from gas line.
12− If the appliance will not operate, follow the instructions
Turning Off Gas to Unit" and call the gas supplier.
Turning Off Gas to Unit
1 − Set the thermostat to the lowest setting.
2 − Turn off all electrical power to the unit if service is to be
performed.
3 − Remove the upper access panel.
4 − White Rodgers 36E Gas Valve − Move switch on gas
valve to OFF.
Honeywell VR8205 Gas Valve − Turn switch on gas
valve clockwise
5 − Replace the upper access panel.
MANIFOLD
PRESSURE
TAP
to ON. Do not force.
to OFF. Do not force.

Gas Pressure Adjustment

Gas Flow (Approximate)
1 − Operate unit at least 15 minutes before checking gas
flow. Determine the time in seconds for one revolu-
tions of gas through the meter. A portable LP gas me-
ter (17Y44) is available for LP applications.
2 − Compare the number of seconds and the gas meter
size in table 31 to determine the gas flow rate. Multiply
the gas flow rate by the heating value to determine the
unit input rate. If manifold pressure is correct and the
unit input rate is incorrect, check gas orifices for proper
size and restriction.
3 − Remove temporary gas meter if installed.
NOTE − To obtain accurate reading, shut off all other gas
appliances connected to meter.
Gas Flow Rate (Ft.
Seconds for 1
Revolution
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
Page 56
TABLE 31
3
/Hr.)
Gas Meter Size
1/2 cu ft Dial 1 cu ft Dial
180 360
150 300
129 257
113 225
100 200
90 180
82 164
75 150
69 138
64 129
60 120
56 113
53 106
50 100
47 95
45 90
43 86
41 82
39 78
38 75
36 72
35 69
33 67
32 64
31 62
30 60