Honeywell DVD Recorder L Manuel D’Utilisation

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66-1153—03

7. Power is connected to the system disconnect switch 

(master switch).

8. Lockout is reset (reset button) only if the Relay Module 

is powered.

9. Run/Test Switch (if present) is in RUN position.

10. System is in STANDBY condition. STANDBY message 

is displayed in the S7800 Keyboard Display Module.

11. All limits and interlocks are reset.

See instructions provided with the amplifier.

Perform this check on all installations that use a pilot. It should 

immediately follow the preliminary inspection.

1. Open the master switch.

2. Make sure that the manual main fuel shutoff valve(s) is 

closed. Open the manual pilot shutoff valve. If the pilot 

takeoff is downstream from the manual main fuel shutoff 

valve(s), slightly open the manual main valve to supply 

pilot gas flow. Make sure the main fuel is shut off just 

upstream from the burner inlet, or disconnect power 

from the automatic main fuel valve(s).

3. Close the master switch and start the system with a call 

for heat by raising the setpoint of the operating 

controller; see the relay module sequence. The R7140 

Relay Module should start a ten-second INITIATE 

sequence.

4. Let the sequence advance to PILOT IGN (status is 

displayed on the Keyboard Display Module, if used), 

PILOT LED turns on, ignition spark should occur and 

the pilot should light. If the pilot ignites, the FLAME LED 

is energized. Go to step 7.

5. If the pilot flame is not established in ten seconds (four 

seconds if configuration jumper JR1 is clipped), safety 

shutdown occurs. Let the sequence complete its cycle.

6. Push the reset push button, and let the system recycle 

once. If the pilot still does not ignite, make the following 

ignition/pilot adjustments:

a. Open the master switch and remove the R7140 

Relay Module from the subbase.

b. On the subbase, jumper L1 to the ignition terminal; 

refer to the appropriate wiring diagram to determine 

the proper terminal. Disconnect the leadwire to the 

pilot valve if it is connected to the same terminal.

c. Close the master switch to energize only the ignition 

transformer.

d. If the ignition spark is not strong and continuous, 

open the master switch and adjust the ignition 

electrode spark gap setting to the manufacturer 

recommendation.

e. Make sure the ignition electrodes are clean.

f. Close the master switch and observe the spark.

g. After a continuous spark is obtained, open the 

master switch and add a jumper on the subbase 

from terminal L1 power to the pilot terminal 5 or 6. 

Reconnect the leadwire from the pilot valve if it was 

disconnected in step b.

h. Close the master switch to energize both the ignition 

transformer and the pilot valve.

i.

If the pilot does not ignite and if the ignition spark is 

still continuous, adjust the pressure regulator until a 

pilot is established.

j.

When the pilot ignites properly and stays ignited, 

open the master switch and remove the jumper(s) 

from the terminals of the subbase.

k. Check for adequate bleeding of the fuel line.

l.

Reinstall the R7140 Relay Module on the subbase, 

close the master switch, and then return to step 4.

7. When pilot ignites, measure the flame signal. If the pilot 

flame signal is unsteady or approaching the 1.25 Vdc 

minimum value, adjust the pilot flame size or detector 

sighting to provide a maximum and steady flame signal.

8. Recycle the system to recheck lightoff and pilot flame 

signal.

9. When the MAIN LED turns on, make sure the automatic 

main fuel valve is open; then smoothly open the manual 

main fuel shutoff valve(s) and watch for main burner 

flame ignition. When the main burner flame is 

established, go to step 16.

10. If the main burner flame is not established within five 

seconds or the normal lightoff time as specified by the 

equipment manufacturer, close the manual main fuel 

shutoff valve(s).

11. Recycle the system to recheck the lightoff and pilot 

flame signal.

12. Smoothly open the manual fuel shutoff valve(s) and try 

lightoff again. (The first re-attempt may have been 

required to purge the lines and bring sufficient fuel to the 

burner.)

13. If the main burner flame is not established within five 

seconds or the normal lightoff time specified by the 

equipment manufacturer, close the manual main fuel 

shutoff valves(s). Check all burner adjustments.

14. If the main burner flame is not established after two 

attempts:

a. Check for improper pilot size.

b. Check for excess combustion air at Low Fire.

c. Check for adequate Low Fire fuel flow.

d. Check for proper gas supply pressure.

e. Check for proper valve operation.

f. Check for proper pilot flame positioning.

15. Repeat steps 8 and 9 to establish the main burner 

flame; then go to step 16.

16. With the sequence in RUN, make burner adjustments 

for flame stability and Btu input rating.

17. Shut down the system by opening the burner switch or 

by lowering the setpoint of the operating controller. 

Make sure the main flame goes out. There may be a 

delay due to gas trapped between the valve(s) and 

burner. Make sure all automatic fuel valve(s) close.

18. Restart the system by closing the burner switch and/or 

raising the setpoint of the operating controller. Observe 

that the pilot is established during PILOT IGN and the 

main burner flame is established during MAIN IGN 

within the normal lightoff time.

19. Measure the flame signal. Continue to check for the 

proper signal through the RUN period. Check the signal 

at both High and Low Firing Rate positions and while 

modulating, if applicable.