Honeywell RA117A - Manual (Page 10)

Burner Does Not Start When Thermostat Calls For Heat
PRELIMINARY CHECKS
1. Ensure all limit switches are closed.
2. Ensure safety switch is reset.
3. Check for the proper line voltage at the oil primary.
Proceed as follows after completing the preliminary checks.
CORRECTIVE ACTION
PROCEDURE BURNER STARTS BURNER DOES NOT START
1. Jumper the thermostat
terminals:
• Low voltage thermostat
at oil primary
• Line voltage thermostat
at thermostat
Trouble in the thermostat circuit.
Check the thermostat and
wiring connections.
Trouble is in the bimetal detector or
the oil primary. Put contacts in step
by pulling drive shaft lever out 1/4
inch and releasing. Refer to Fig. 8.
2. Jumper thermostat terminals
to start burner.
Bimetal detector and oil primary
are OK.
Clean the bimetal detector contacts
and timer contacts (if provided).
Go to step 3.
3. Jumper thermostat terminals
to start burner.
Bimetal detector and oil primary
are OK.
Go to step 4.
4. Jumper the thermostat
terminals and jumper the
normally closed contacts.
Reclean the bimetal detector
contacts again and recheck
by jumpering the thermostat
terminals. If the burner starts,
bimetal detector and oil primary
are OK.
Go to step 5.
5. Jumper the thermostat
terminals and jumper the
R and B terminals on the
oil primary.
Check for broken wires, loose
connections between the bimetal
detector and the control.
Repair and recheck by jumpering
the thermostat terminals. Replace
the bimetal detector if necessary.
Replace the oil primary and perform
Startup and Checkout procedures.
Burner Starts, Flame Is Established. Then Safety Switch Locks Out on Safety.
PRELIMINARY STEPS;
1. Reset the safety switch.
2. Clean bimetal detector contacts.
Proceed as follows after completing the preliminary checks.
CORRECTIVE ACTION
PROCEDURE BURNER KEEPS RUNNING BURNER LOCKS OUT
1. Jumper thermostat
terminals to start burner.
• Low voltage thermostat
at oil primary
• Line voltage thermostat
at thermostat
Bimetal detector and oil primary
are OK. • Clean the drive shaft, remove
the detector and clean bimetal
element. Replace the detector.
• Check the detector location. If
the stack temperature is below
300° F [149° C], replace the bimetal
detector.
2. Reset the safety switch
and jumper the thermostat
terminals to start the burner.
Bimetal detector and oil primary
are OK.
Replace the oil primary and perform
Startup and Checkout procedures.
Honeywell Inc.
U.S.A.: 1885 Douglas Drive N.
Golden Valley, MN 55422-4386
CANADA: 740 Ellesmere Road
Scarborough, Ontario M1P 2V9
International Sales Offices in all principal cities of the world. Manufacturing in
Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands,
Spain, Taiwan, United Kingdom, U.S.A.
PRINTED IN U.S.A.
QUALITY IS KEY