54
M
aintaining the Boiler
Checking the Ignition Ground Wiring
1. Check that the ground wire is in good condition and
securely attached to the boiler casing.
2. Check ground continuity of wiring using continuity
m
eter.
3. Replace ground wires if ground continuity is not satisfactory.
Checking all Boiler Wiring
I
nspect all boiler wiring,
m
aking sure wires are in good condition
and securely attached.
Checking the Control Settings
Check settings of external li
m
it controls (if any) and adjust if
necessary.
Performing Start-up and Checks
1. Start boiler and
m
ake sure that the boiler is operating
properly.
2. Verify cold fill pressure is correct and that operating pressure
does not go too high.
Check the Burner Flame
1.
I
nspect fla
m
e through observation window.
2.
I
f the fla
m
e is unsatisfactory at either high fire or low fire,
check for obstructions in the flue.
Review with the Owner
1. Review the User’s
I
nfor
m
ation
M
anual with the owner.
2. E
m
phasize the need to perfor
m
the
m
aintenance schedule.
3. Re
m
ind the owner of the need to call a licensed contractor
should the boiler or syste
m
exhibit any unusual behaviour.
4. Re
m
ind the owner to follow the proper shutdown procedure
and to schedule an annual start-up at the beginning of the
next heating season.
WARNING
Failure to inspect for the above conditions and have the
m
repaired can result in severe personal injury.
Checking the Water System
1. Verify all syste
m
co
m
ponents are correctly installed and
operational.
2. Check the cold fill pressure for the syste
m
. Verify it is correct
(
m
ust be a
m
ini
m
u
m
of 0.8 bar).
3. Watch the syste
m
pressure as the boiler heats up (during
testing) to ensure pressure does not rise too high.
Note
Ɣ
I
f the syste
m
contains glycol, test for proper
concentration as reco
mm
ended by
m
anufacturer.
Ɣ
Excessive pressure rise indicates expansion tank
sizing or perfor
m
ance proble
m
.
4.
I
nspect auto
m
atic air flues and air separators. Re
m
ove air
flue caps and briefly press push valve to flush flue.
5. Replace
caps.
M
ake sure flues do not leak. Replace any
leaking flues.
Inspecting the Ignition and Flame Detector Electrodes
1. Re
m
ove the ignition and fla
m
e detector electrodes fro
m
the
boiler heat exchanger.
2. Re
m
ove any deposits accu
m
ulated on the ignition/fla
m
e
detector electrode.
I
f the electrodes cannot be cleaned
satisfactorily, replace with new ones.
3. Replace
ignition/fla
m
e detector electrode,
m
aking sure
gasket is in good condition and correctly positioned.
Summary of Contents for NCB-24LDWE
Page 65: ...Appendices 65 12 4 Ladder Diagram 3 15A...
Page 69: ...Memo...
Page 70: ...Memo...
Page 71: ...Memo...
