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FORCE E
Installation, Operating & Service Manual
109444-03 - 12/19
2. PURGE AIR FROM GAS PIPING by loosening
(or removing) “Inlet Pressure Tap” plug on gas
valve (See Figure 9-2). Tighten (or replace)
plug when you start to smell gas. Adequate
ventilation must be provided and no smoking
or open flame permitted.
3. Locate and address leaks using listed
combustible gas detector,a non corrosive leak
detection fluid or other listed leak
detection method.
a. Check pipe fittings up to inlet of gas valve
b. Check piping between gas valve and
orifices (after boiler is operating).
c. Check piping between gas valve and pilot
(after boiler is operating).
4. Tighten appropriate pipe connections.
I. Check pilot burner flame.
Natural Gas Only .
Pilot produces single flame.
Flame should be steady medium hard blue
enveloping 3/8 to 1/2 inch of igniter-sensor tip.
See Figure 9-3.
9
System Start-Up and Checkout
(continued)
4. Turn "OFF" the electric switch to boiler.
G. Start boiler according to "Operating Instructions"
in Figure 9-1.
H. Perform gas leak test downstream of boiler
manual shutoff valve.
1. Open manual shutoff valve.
F. Perform limit check
1. Ensure gas to boiler is off
2. Set ROOM THERMOSTAT to lowest setting.
3. If limits are functioning properly (LWCO, flame
rollout switch, blocked vent switch, damper),
boiler should spark. If boiler does not spark,
see Section 14 "Troubleshooting" for guidance.
Figure 9-3: Pilot Burner Flame (NG Only)
Figure 9-4: Pilot Burner Flame (LP Only)
Figure 9-2: Top View of Gas Valves
LP Gas Only
. Pilot burner produces three (3)
flames. The center flame should be steady,
medium hard blue enveloping 3/8 to 1/2 inch of
sending probe. See Figure 9-4.
