Honeywell R4140G Installation Instructions Manual page 22

R4140G, L AND M FLAME SAFEGUARD PROGRAMMING CONTROLS
Symptom
G. Pilot (or first stage burner)
ignites and relay 2K pulls in,
but main burner (or second
stage burner) does not light.
(Safety shutdown occurs
when using an interrupted
pilot.) Continued.
H. Pilot does not go out at
end of main burner flame-
establishing period.
(Applicable only if using an
interrupted pilot.)
l. Burner cycles on and off
continuously; programmer
does not stop for Run period.
60-0770—2
Table 5. Troubleshooting Chart (Continued) .
Test
3. If main burner (or second stage burner) still
does not light, close all manual fuel shutoff
valves immediately, open master switch,
and remove programmer from subbase.
4. Check operation of automatic main fuel
valve (or second stage fuel valve): open
master switch, jumper terminals L1-7 on
subbase, and close master switch. Listen
for and observe operation of the valve and
actuator.
5. Open master switch, and remove test
jumper from subbase.
CAUTION
Make sure the test jumper has been removed from terminals L1-7 on the subbase
before proceeding.
6. Reinstall programmer on subbase, and
reset Lockout switch (if tripped).
7. Open all manual fuel shutoff valves, close
master switch, and recycle programmer.
8. When main burner (or second stage
burner) lights satisfactorily, repeat
appropriate Initial Lightoff Check and Pilot
Turndown Test.
1. Close all manual fuel shutoff valves, open
master switch, and remove programmer
from subbase.
2. If programmer has provisions for extending
the main burner flame establishing period
(MBFEP) at terminal 6, check back of
programmer; otherwise, proceed to step 3.
3. Check operation of automatic pilot valve:
make sure master switch is open, and
jumper terminals L1-5 or L1-6 on subbase.
(Refer to appropriate wiring diagram to
determine proper terminals.) Close master
switch to actuate valve. After valve opens,
open master switch to close valve.
4. Make sure master switch is open, remove
test jumper from subbase, and reinstall
programmer on subbase.
5. Close master switch and recycle
programmer.
6. When pilot valve operates satisfactorily,
repeat Pilot Turndown Test
1. Open master switch; check burner
controller, all limits, and all interlocks
(including Airflow switch).
CAUTION
Replace all external devices not operating properly. Do not bypass external devices.
2. Close master switch, and recycle
programmer.
Possible Cause/Correction
3. Make sure that external circuits are wired
correctly; replace deteriorated leadwires.
4. If valve or actuator is not operating
properly, replace it.
5. No action.
6. No action.
7. If main burner flame (or second stage
flame) is still not established, replace
programmer.
8. Follow instructions in the Checkout section.
1. Make sure that external circuits are wired
correctly; replace deteriorated leadwires.
2. Make sure jumper is or is not installed,
depending on MBFEP desired.
3. If valve does not close properly, replace it.
4. No action.
5. If pilot still does not go out, replace
programmer.
6. Follow instructions in Checkout section.
1. a. Make sure all circuits are wired
correctly; replace deteriorated lead
wires.
b. If burner controller, limit, or interlock is
not operating properly, replace it.
2. If programmer still does not stop for Run
period, replace it.
22
(Continued)