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SERIES 4 — GAS-FIRED WATER BOILER —
7b
Start-up — operate boiler
Start the boiler
•
Follow the
Operating instructions
start the boiler.
•
See
if boiler fails to start.
Section 7c
Check system and boiler
1.
Check system piping for leaks.
and repair immediately.
2.
Vent air from system
system will interfere with circulation and cause heat
distribution problems and noise.
3.
thoroughly for signs of deterioration
Inspect vent system
from corrosion, physical damage or sagging. In addi-
tion — Check for gas-tight seal at every connection and
seam.
Venting system must be sealed gas-tight
spillage and carbon monoxide emissions
which will result in severe personal injury
or death.
4.
Check around the boiler
cedure of Section
of this manual.
7a
5.
per Section
Verify operation
procedure in Section
8
on the same page.
service certificate
Check burner flames
View pilot and main flames through the inspection port in
the base burner shield.
Pilot burner flame (
Figure 28
PROPER pilot flame characteristics
1. Blue flame.
2. Inner cone engulfing pilot flame sensor.
3. Pilot flame sensor glowing cherry red.
IMPROPER pilot flame characteristics
1. Overfired — Large flame lifting or blowing past
pilot flame sensor.
2. Underfired — Small flame. Inner cone not
engulfing pilot flame sensor.
3. Lack of primary air — Yellow flame tip.
4. Incorrectly heated pilot flame sensor.
7c
Start-up — if boiler doesn't start . . .
Check for:
1. Loose connections, blown fuse or
service switch off?
2. High limit switch set below boiler
water temperature?
3. Thermostat set below room tem-
perature?
Part Number 550-142-302/0124
from Section
If found, shut down boiler
using manual vents. Air in the
to prevent flue gas
for gas odor following the pro-
7b
. Perform check-out
, and fill in the
Installation and
)
Boiler Manual
(continued)
to
Main burner flame (
9c
PROPER main burner flame characteristics
1. Yellow-orange streaks may appear (caused by
dust).
IMPROPER main burner flame characteristics
1. Overfired — Large flames.
2. Underfired — Small flames.
3. Lack of primary air — Yellow tipping on flames
(sooting will occur).
Figure 28 Typical pilot burner flame
Figure 29 Typical main burner flame
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
section
shooting ,
11
)
Figure 29
of this manual.
Trouble-
35
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