Manual

21
F. Check Pilot Burner Flame.
1. Continuous Ignition (Standing Pilot, Natural Gas),
Models 20 through 70 and Model 20 (Standing
Pilot, LP). See Figure 19. Pilot burner produces
a single ame. The ame should be steady,
medium hard blue enveloping 3/8 to 1/2 inch of
thermocouple.
2. Continuous Ignition (Standing Pilot, Natural and
LP Gas), Models 80 through 100 and Continuous
Ignition (Standing Pilot, LP gas), Models 30 through
70. See Figure 20. Pilot burner produces three
(3) ames. The center ame should be steady,
medium hard blue enveloping 3/8 to 1/2 inch of
thermocouple.
3. Intermittent Ignition (EI). See Figure 21. The pilot
burner should be lit only if thermostat is calling for
heat. The pilot burner produces three (3) ames.
The center ame should be steady, medium hard
blue enveloping 3/8 to 1/2 inch of thermocouple.
G. Check Ignition System Shutoff. Gas valve should
close and pilot and main burners should extinguish.
1. Continuous Ignition (standing pilot). Disconnect
thermocouple at gas valve.
2. Intermittent Ignition (EI). Disconnect sensor wire
from Terminal 4 SENSE on Ignition Module.
H. Check Vent Damper Operation. Vent Damper must
be in open position when main burners are ignited.
I. Check Limit.
1. Adjust thermostat to highest setting.
2. Observe temperature gauge. When temperature is
indicated, adjust limit to setting below observed
temperature. Main burners should extinguish.
3. Adjust limit to setting above observed temperature.
Ignition sequence should begin.
4. Adjust thermostat to lowest setting. Adjust limit to
desired setting.
J. Check Thermostat Operation. Raise and lower
temperature setting to start and stop boiler operation.
Adjust thermostat to normal setting.
K. Review User's Information Manual and system
operation with owner or operator.
L. Post instructions near boiler for reference by owner
and service personnel.
Figure 19: Pilot Burner Flame, Continuous Ignition,
Model 20: LP Gas
Models 20 through 70: Natural Gas
Figure 20: Typical Pilot Flame, Continuous Ignition,
Models 30 through 70: LP Gas,
Models 80 through 100: Natural and LP Gas
Figure 21: Pilot Burner Flame, Intermittent Ignition,
Models 20 through 100: Natural and LP Gas