Install Instructions

Part Number 550-142-902/1016
CGi
GAS-FIRED WATER BOILER — SERIES 3 — Boiler Manual
35
Start the boiler
• FollowtheOperating instructionsfromSection9c to start
the boiler.
• SeeSection 7c if boiler fails to start.
Check system and boiler
1. Check system piping for leaks. If found, shut down boiler
and repair immediately.
2. Vent air from systemusingmanualvents.Airinthesystem
will interfere with circulation and cause heat distribution
problems and noise.
3. Inspect vent system thoroughly for signs of deterioration
from corrosion, physical damage or sagging. In addition —
Checkforgas‑tightsealateveryconnectionandseam.
Venting system must be sealed gas-tight to prevent flue gas
spillage and carbon monoxide emissions which
will result in severe personal injury or death.
4. Check around the boiler for gas odor following the procedure
ofSection7a of this manual.
5. Verify operation per Section 7b. Perform check-out pro-
cedureinSection8, and fill in the Installation and service
certicate
on the same page.
Start-up — operate boiler (continued)
7b
Check burner flames
Viewpilotandmainamesthroughtheinspectionportinthe
base burner shield.
Pilot burner flame (Figure 28)
PROPER pilot flame characteristics
1. Blueame.
2. Inner cone engulfing pilot flame sensor.
3. Pilot flame sensor glowing cherry red.
IMPROPER pilot flame characteristics
1. Overred—Largeameliftingorblowingpastpilot
flame sensor.
2. Underred—Smallame.Innerconenotengulng
pilot flame sensor.
3. Lackofprimaryair—Yell owametip.
4. Incorrectly heated pilot flame sensor.
Figure 28 Typical pilot burner flame
Figure 29 Typical main burner flame
Main burner flame (Figure 29)
PROPER main burner flame characteristics
1. Yellow‑orangestreaksmayappear(causedbydust).
IMPROPER main burner flame characteristics
1. Overred—Largeames.
2. Underred—Smallames.
3. Lackofprimaryair—Yell owtippingonames
(sooting will occur).
Check for:
7c
4. Gasnotturnedonatmeterorboiler?
5. Incoming gas pressure less than:
 5”w.c.fornaturalgas?11”w.c.forpropanegas?
6. If none of the above corrects the problem, refer to
Troubleshoot-
ing
, section 11 of this manual.
1. Looseconnections,blownfuseorser-
viceswitchoff?
2. Highlimitswitchsetbelowboilerwater
temperature?
3. Thermostat set below room tempera-
ture?
Start-up — if boiler doesn’t start . . .