Honeywell 7800 Series Manual page 33

5. For each test, open the master switch and install the
jumper wire(s) between the subbase wiring terminals listed in
the Test Jumpers column.
6. Close the master switch before observing operation.
7. Read the voltage between the subbase wiring terminals
listed in the Voltmeter column.
8. If there is no voltage or the operation is abnormal,
check the circuits and external devices as described in the
last column.
9. Check all wiring for correct connections, tight termi-
nal screws, correct wire, and proper wiring techniques.
Replace all damaged or incorrectly sized wires.
Test RM7800 Test
No. Models Jumpers
WARNING
!
Make sure all manual fuel shutoff valves are closed.
IMPORTANT: Low fuel pressure limits, if used, could be open. Bypass them with jumpers for the remaining Static
Tests (if required).
1 All None
2 All None
3 All None
4 All 4-5
5 All 4-10
6 All 4-8
7 All 4-21
TABLE 7—STATIC CHECKOUT.
Volt-
meter Normal Operation
4-L2 Line voltage at terminal 4.
6-L2 Line voltage at terminal 6.
20-L2 Line voltage at terminal 20.
7-L2 1. Burner motor (fan or blower)
starts.
2. Line voltage at terminal 7 within
10 seconds.
— Ignition spark (if ignition transformer
is connected to terminal 10).
— 1. Ignition spark (if ignition
transormer is connected to
terminal 8).
2. Automatic pilot valve opens (if
connected to terminal 8).
NOTE: Refer to wiring diagram of
system being tested.
— Same as test no. 6 for connections
to terminal 8. If using direct spark
ignition, check the first stage fuel
valve(s) instead of the pilot valve.
33
10. Replace faulty controllers, limits, interlocks, actua-
tors, valves, transformers, motors and other devices as
required.
11. Ensure normal operation is obtained for each required
test before continuing the checkout.
12. After completing each test, be sure to remove the test
jumper(s).
If Operation Is Abnormal,
Check The Items Listed Below
1. Master switch.
2. Power connected to the master switch.
3. Overload protection (fuse, circuit
breaker, etc.) has not opened the
power line.
1. Limits.
2. Burner controller.
1. Preignition interlocks.
1. Burner motor circuit.
a. Manual switch of burner motor.
b. Burner motor power supply, over
load protection, and starter.
c. Burner motor.
2. Running or Lockout Interlocks (in-
cluding Airflow Switch).
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
2. Listen for click or feel head of valve
for activation.
a. Actuator if used.
b. Pilot valve.
Same as test no. 6. If using direct spark
ignition, check the first stage fuel
valve(s) instead of the pilot valve.
RM7800E,G,L,M
STATIC CHECKOUT
(continued)
65-0117—2