© 2021 Carrier
9
10.1 INSPECTION AND MAINTENANCE
SP-32-NG/PG-FD
pilot because of its simple design does not require complicated maintenance procedures.
Checking and cleaning of gas tube and orifice-stabilizer assembly:
a)
Close the manual gas valve and disconnect the pilot gas line.
b)
Disconnect the ignition rod electric supply cable.
c)
Unscrew the locking screw and the mounting ring.
d)
Carefully slide out the gas part assembly from the air tube.
e)
Check the ignition rod at least every 12 months. For checking and standard service do not remove the rod
from the gas part. Follow the igniter User’s Manual.
Pull out the electrical igniter only if it is absolutely necessary e.g. when rod is worn or damaged and has to
be repaired or replaced. Before that, loose the ignition rod holding gland and then follow p. 7.2.
Unscrew the rod tip before pulling out rod from the gas part and holding gland for easier slide without any
jamming.
f)
Check and clean the bleed orifice and main nozzle. For cleaning use a soft copper wire.
g)
To remove heavy dirt use a soft wire brush e.g. copper wire brush.
h)
Blow compressed air through the whole gas part assembly.
i)
To check the air tube condition loosen the mounting tube clamp assembly screws and pull out air tube.
Check for overheating traces and clean it.
j)
Assemble all the elements back to obtain the original configuration.
Checking of ignition device:
k)
Check the complete ignition device at least every 12 months. Follow instructions in its User's Manual.
10.2 TROUBLESHOOTING
If the gas pilot does not operate correctly check the following:
a)
All manual gas valves on gas supply line were open and there is gas available.
b)
All valves in the supply line are functioning properly.
c)
The preset gas pressure is correct.
d)
The correct pilot air pressure is maintained.
e)
Gas and air supply lines are clear - check strainers.
f)
Bleed orifice and the main orifice in orifice-stabilizer assembly are clear.
g)
Electric ignition device is working correctly and its rod is correctly positioned in gas part assembly. If it is
not working properly - follow the ignition device manual.
h)
The power parameters for ignition device are correct.
If the gas lights but the flame is unstable, or goes out when main burner goes into operation, check that:
i)
The gas pressure does not drop during pilot light-off (trial for ignition).
j)
The air pressure is always at the correct level.
k)
The air from the main burner does not blow out the pilot flame or does not move it out of the field of view
of the flame scanner (if applied).
l)
Flame safeguard system works correctly and the flame is not obscured.
Improper operation of the whole installation requires the detailed checking of the power line and all components,
including any temporary use of override switches or jumpers.
Be aware of all connections to be later restored to normal state, to allow safe operation.
11.
SPARE PARTS, WARRANTY CONDITIONS
11.1 For start-up and warranty period it’s recommended to order following spare parts in quantity as below:
–
a set of loose parts used on both sizes on pilots:
SP-32
and
SP-48
(see Fig. 5) - one for 4 pilots,
–
complete orifice-stabilizer assembly for
SP-32-FD
pilot, including:
- one for 4 pilots.
nipple with bleed and main orifice, mounting bracket, stabilizer
