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Part Number 550-142-300/0520
44
CGa Series 3 Gas-Fired Water Boiler — Boiler Manual
Service & maintenance – annual start-up (cont.)10b
❏ Inspect . . .
Boiler heating surfaces
1. Disconnect the vent pipe at the boiler draft hood
and remove draft hood after turning off power to
the boiler.
2. Use a bright light to inspect the boiler flue collector
and heating surfaces.
3. If the vent pipe or boiler interior surfaces show
evidence of soot, follow Cleaning boiler heating
surfaces
in this manual section. Remove the flue
collector and clean the boiler if necessary after closer
inspection of boiler heating surfaces.
4. If there is evidence of rusty scale deposits on boiler
surfaces, check the water piping and control system
to make sure the boiler return water temperature is
properly maintained (per this manual).
5. Reconnect vent and draft hood. Replace all boiler
components before returning to service.
6. Check inside and around boiler for evidence of any
leaks from the boiler. If found, locate source of leaks
and repair. Burners and base
The boiler contains ceramic
fiber and fiberglass materials.
Use care when handling these
materials per instructions on
page 66 of this manual. Failure
to comply could result in severe
personal injury.
If insulation is damaged or
displaced, do not operate the
boiler. Replace or reposition
insulation as necessary. Failure
to replace damaged insulation
can result in a fire hazard,
causing severe personal injury,
death or substantial property
damage.
1. After turning off power to the boiler, remove the
jacket door and base access panel (Figure 32, item 4,
page 60).
2. Inspect burners and all other components in the
boiler base.
3. If burners must be cleaned, raise rear of each
burner to release from support slot, slide forward
and remove. Then brush and vacuum the burners
thoroughly, making sure all ports are free of debris.
Carefully replace all burners, making sure burner
with pilot bracket is replaced in its original position
and all burners are upright (ports up).
4. Inspect the base insulation.
a. Pay attention to the
WARNINGS on page 66
regarding working with insulation materials.
b. Verify that the insulation is intact and secure
against all four sides of the base.
❏ Service . . .
Oiled-bearing circulators
1. The circulator shipped with the CGa boiler is water-
lubricated. No oiling is required.
2. Check other circulators in the system. Oil any
circulators requiring oil, following circulator
manufacturer’s instructions. Over-oiling will
damage the circulator.
Temperature/LWCO sensor
1. The temperature/LWCO sensor may accumulate
deposits on the probe surface. Annual inspection
and cleaning of the probe will improve boiler
performance.
Disconnect power, unplug harness from sensor.
a. Drain boiler water to a level below the sensor.
b. Remove sensor from boiler.
c. Wipe any built up contaminates from probe
and insulator surfaces.
d. Reinstall sensor into boiler using appropriate
thread sealant. Do not overtighten.
e. Refill boiler.
❏ Start-up . . .
1. Perform all start-up procedures given in Section 6
of this manual.
2. Verify cold fill pressure is correct and that fill
system is working properly.
3. Verify antifreeze level (if used) is at the right con-
centration and that inhibitor level is correct.
4.
Check gas piping, per manual Sections 4 and 6,
verifying no indications of leakage and all piping
and connections are in good condition.
5. Read the Operating instructions (manual
Section 9 ) applying to the boiler.
6. Start the boiler following appropriate Operating
instructions
(manual Section 9).
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