RM7885A 7800 SERIES RELAY MODULES
32-00215—01
12
CAUTION
Electrical Surge Hazard.
Can cause equipment damage.
Do not perform a dielectric test with the RM7885A
installed. Internal surge protectors will break down
and conduct a current. This can cause the
RM7885A to fail the dielectric test or possibly
destroy the internal lightning and high current
protection.
Equipment Recommended
1.
Voltmeter (1M ohm/volt minimum sensitivity) set on
the 0 to 300 Vac scale.
2.
Two jumper wires, no. 14 wire, insulated, 12 in.
(305 mm) long with insulated alligator clips at both
ends.
General Instructions
1.
Perform all applicable tests listed in Static Checkout,
Table 3, in the order listed.
2.
Make sure 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 termi-
nals 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.
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 tech-
niques. Replace all damaged or incorrectly sized
wires.
8.
Replace faulty controllers, limits, interlocks, actua-
tors, valves, transformers, motors and other devices,
as required.
9.
Make sure normal operation is obtained for each
required test before continuing the checkout.
10.
After completing each test, be sure to remove the
test jumper(s).
WARNING
Explosion Hazard.
Can cause severe injury, death or property
damage.
Be sure all manual fuel shutoff valves are closed.
Table 3. Static Checkout.
Test No.
Test
Jumpers
Voltmeter
Normal Operation
If Operation is Abnormal, Check These Items
1
—
L2-3
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
3-4
—
Alarm sounds.
1.
Alarm.
2.
Alarm Silencing Switch.
3
—
(May need
to jumper
limits, if
used.)
L2-6
Line voltage.
1.
Limit.
2.
Stop station.
3.
Alarm Silencing Switch.
4
3-8
—
Pilot Valve opens.
1.
Listen for click or feel head of valve for activa-
tion.
2.
Actuator, if used.
3.
Pilot Valve.
5
3-9
—
Main Fuel Valve(s) open(s).
1.
Listen for click or feel head of valve for activa-
tion.
2.
Actuator, if used.
3.
Pilot Valve.
6
3-10
—
Push Start Switch and listen
for ignition noise.
1.
Start Switch.
2.
Ignition transformer.
Final
CAUTION
Equipment Damage Hazard.
Failure to remove test connections can damage equipment.
After completing these tests, open the master switch and remove all test jumpers from the subbase
terminals. Remove any bypass jumpers from the low fuel pressure limits.