Honeywell 7800 Series Manual page 35

GENERAL INSTRUCTIONS
1. Perform all applicable tests listed in Static Checkout,
Table 10, in the order listed.
2. Make sure that all manual fuel shutoff valve(s) are
closed.
3. For each test, open the master switch and install the
jumper wire(s) between the subbase wiring terminals listed
in the Test Jumpers column.
4. Close the master switch before observing operation.
5. Read the voltage between the subbase wiring termi-
nals listed in the Voltmeter column.
Test Test
No. Jumpers Voltmeter
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 None 4-L2
2 None 7-L2
3 4-5
4 4-10
5 4-8
6 4-9
7 4 -3
8 4-5 and 18-L2
12-13
9 4-5 and 18-L2
14-13
WARNING
Make sure all manual fuel shutoff valves are closed.
TABLE 10—STATIC CHECKOUT.
Normal
Operation
Line voltage at terminal 4.
Line voltage at terminal 7.
1. Air Valve starts.
— Ignition spark
— 1. Automatic pilot valve opens
NOTE: Refer to wiring diagram
of system being tested.
— Automatic main fuel valve(s)
opens.
— Alarm (if used) turns on.
Firing rate motor drives open;
zero volts at terminal 18 after
motor starts driving open.
Firing rate motor drives closed;
line voltage at terminal 18 after
motor is in Low Fire position.
6. If there is no voltage or the operation is abnormal,
check the circuits and external devices as described in the
last column.
7. Check all wiring for correct connections, tight termi-
nal screws, correct wire, and proper wiring techniques.
Replace all damaged or incorrectly sized wires.
8. Replace faulty controllers, limits, interlocks, actua-
tors, valves, transformers, motors and other devices as
required.
9. Obtain normal operation for each required test before
continuing the checkout.
10. 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) has not opened the power line.
1. Limits.
1. Air Valve circuit.
a. Manual switch of Air Valve.
b. Air Valve power supply, overload
protection, and starter.
c. Air Valve.
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer.
1. Listen for click or feel head of valve
for activation.
a. Actuator if used.
b. Pilot valve.
1. Listen for and observe operation of the
main fuel valve(s) and actuator(s).
2. Valve(s) and actuator(s).
1. Alarm
1. Low Fire Start Switch.
2. Firing rate motor and transformer.
1. Low Fire Start Switch.
2. Firing rate motor and transformer.
35
RM7888A
STATIC CHECKOUT
(Continued)
65-0175