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Q624A SOLID STATE SPARK GENERATOR
Table 1. Wiring Connections.
Flame Safeguard
Q624A
Control Model
Terminal
RA890G and R4795 T1
T2
R4126, R4127,
T1
R4140, and BC7000
T2
R4150
T1
T2
RM7800
T1
T2
PRIMARY
SAFETY
CONTROL
1
IGNITION TERMINAL OF PRIMARY SAFETY
CONTROL; SEE APPROPRIATE INSTRUCTION
SHEET FOR TERMINAL DESIGNATION.
1
TERMINAL STRIP OR WIRING SUBBASE.
2
USE NEC CLASS 1 WIRING.
Fig. 4. Q624A connections for RA890G, R4795, R4126,
R4127, R4140, BC7000 and 7800 SERIES flame safeguard
PRIMARY
SAFETY
CONTROL
1
IGNITION TERMINAL OF PRIMARY SAFETY
CONTROL; SEE APPROPRIATE INSTRUCTION
SHEET FOR TERMINAL DESIGNATION.
1
TERMINAL STRIP OR WIRING SUBBASE.
2
USE NEC CLASS 1 WIRING.
Fig. 5. Q624A connections for R4150 flame safeguard
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2009 Honeywell International Inc.
60-2049—08
M.S. Rev. 02-09
Flame Safeguard Control
Terminal
4
L2
Appropriate ignition terminal
as specified on programmer
instruction sheet.
L2
L2
Appropriate ignition terminal
as specified on programmer
instruction sheet.
10
L2
TERMINAL BOARD
INSIDE Q624A
2
T1
L2
T2
M9792
controls.
TERMINAL BOARD
INSIDE Q624A
L2
T1
2
T2
M9791
control.
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
CHECKOUT
After the Q624A installation and wiring has been completed,
make the following checks to ensure that the system is
working properly.
Ignition Spark Response Test
The flame relay should not respond (pull in) to ignition spark.
To determine flame detector sensitivity to ignition spark,
perform the following steps:
1. Shut off the fuel supply to both pilot and main fuel
valves manually.
2. Start system by raising the controller set point or by
pressing the Start button.
3. Energize the Q624A Solid State Spark Generator so
ignition spark is produced between electrode and
ground.
4. Check to be sure that ignition has not occurred (there
should be no flame). Repeat steps 1 through 3 above
until there is no flame.
5. Check the flame relay on the flame safeguard control. If
the relay has not pulled in, the system is operating
properly. Continue checkout with the pilot turndown test.
6. If the flame relay pulls in, stop the system, replace the
Q624A, and repeat steps 2 through 5.
7. If the flame relay pulls in after replacing the Q624A, stop
the system, replace the flame safeguard control, and
repeat steps 2 through 5.
8. If the flame relay pulls in after replacing the flame
safeguard control, contact the local Honeywell branch
office.
Pilot Turndown Test
Refer to the flame safeguard control instructions for the exact
procedure to be used in performing the pilot turndown test.
Final Checkout
After other checks have been completed, restore the system
to normal operation and observe at least one complete cycle
of operation to be sure of satisfactory burner operation.
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