RM7890A,B,C/EC7890A,B 7800 SERIES RELAY MODULES
66-1089—11
6
WARNING
Explosion Hazard.
Can cause serious injury or death.
Be 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).
Table 5. Static Checkout.
Test
No.
Test Jumpers
Voltmeter
Normal Operation
If Operation is Abnormal, Check the Items
Listed Below
1
—
3-L2
Line Voltage.
1. Master switch.
2. Power connected to the master switch.
3. Overload protection (fuse, circuit breaker,
etc.) has not opened the power line.
2
—
6-L2
Line Voltage.
1. Limits.
2. Burner control.
3
3-10
—
Ignition spark (if ignition
transformer is connected to
terminal 10).
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean
b. Ignition transformer is okay.
4
3-8
—
1. Ignition spark (if ignition
transformer is connected to
terminal 8).
2. Automatic pilot valve opens (if
connected to terminal 8 or main
valve if DSI application).
NOTE: Refer to wiring diagram of
system being tested.
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.
5
3-9
—
Automatic fuel valve(s) opens. (If
using direct spark ignition, check
the second stage fuel valve(s).)
Same as test number 4. If using direct spark
ignition, check the first stage fuel valve(s) instead
of the pilot valve.
6
3-4
—
Alarm (if used) turns on.
1. Alarm.
FINAL
CAUTION
Equipment Damage Hazard.
Can cause serious equipment damage.
After completing these tests, open the master switch, remove all test jumpers from the subbase terminals, and
remove any bypass jumpers from the low fuel pressure limits to prevent equipment damage.
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