Install Instructions
39
H. Check pilot burner ame. See Figure 24. Flame
should be steady, medium hard blue enveloping 3/8 to
½ inch of sensing probe.
I. Check main burner ame. See Figure 23. Flame
should have clearly dened inner cone with no yellow
tipping. Orange-yellow streaks should not be confused
with true yellow tipping.
Figure 23: 1 Inch Main Burner Flame
Figure 24: Pilot Burner Flame
J. Check thermostat operation. Raise and lower
temperature setting to start and stop boiler operation.
K. Check ignition control module shut-off. Disconnect
pilot lead wires from gas valve. If burners do not
shutdown, determine cause of malfunction. Replace
necessary items and check operation.
L. Check low water cutoff (if so equipped).
1. Adjust thermostat to highest setting.
2. With boiler operating, open drain valve and slowly
drain boiler.
(continued)
3. Main burners and pilot burner will extinguish and
blower will stop when water level drops below low
water cutoff probe. Verify limit, thermostat or other
controls have not shut off boiler.
4. Adjust thermostat to lowest setting. Rell boiler.
M. Check limit.
Jumper Thermostat connections in boiler wiring
harness. Allow burners to operate until shutdown by
limit. REMOVE JUMPER.
N. Adjust gas input rate to boiler.
1. Adjust thermostat to highest setting.
2. Check manifold gas pressure. See Table 5 or rating
label located in the boiler’s vestibule compartment.
Adjust gas valve pressure regulator as necessary
(turn adjustment screw counterclockwise to
decrease manifold pressure, or clockwise to increase
manifold pressure). If pressure cannot be attained,
check gas valve inlet pressure. If less than minimum
indicated in Table 5 or boiler’s rating label, contact
gas supplier for assistance.
3. Clock gas meter for at least 30 seconds. Use Table
10 to determine gas ow rate in Cubic Feet per
Hour.
Seconds
for One
Revolution
Size of Gas Meter Dial
One-Half
Cu. Ft.
One
Cu. Ft.
Two
Cu. Ft.
30 60 120 240
32 56 113 225
34 53 106 212
36 50 100 200
38 47 95 189
40 45 90 180
42 43 86 172
44 41 82 164
46 39 78 157
48 37 75 150
50 36 72 144
52 35 69 138
54 33 67 133
56 32 64 129
58 31 62 124
60 30 60 120
Table 10: Gas Flow Rate in Cubic Feet
Per Hour