7800 SERIES RELAY MODULES
7 32-00213—01
Explosion Hazard.Can cause explosion, electrical
shock or equipment damage.
1. Close all manual fuel shutoff valves before starting
these tests.
2. Use extreme care while testing the system. Line volt-
age is present on most terminal connections when
power is on.
3. Open the master switch before installing or remov-
ing a jumper on the subbase.
4. Before continuing to the next test, be sure to remove
test jumpers used in the previous test.
5. Replace all limits and interlocks that are not operat-
ing properly. Do not bypass limits and interlocks.
Equipment Damage Hazard. Can cause
equipment damage.
Do not perform a dielectric test with the RM7838A
installed. Internal surge protectors will break down and
conduct a current. This can cause the RM7838A 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.
(304.8 mm) long with insulated alligator clips at
both ends. An ammeter can replace the jumper wire
to confirm the amp draw when testing the ignition,
pilot valve or main valve.
General Instructions
1. Perform all applicable tests listed in Static Checkout,
Table 7, in the order listed.
2. Make sure all manual fuel shutoff valves are closed.
3. Raise the setpoint of the operating controller to sim-
ulate a call for heat.
4. For each test, open the master switch and install the
jumper wires between the subbase wiring terminals
listed in the Test Jumpers column.
5. Close the master switch before observing operation.
6. Read the voltage between the subbase wiring termi-
nals listed in the Voltmeter column.
7. If there is no voltage or the operation is abnormal,
check the circuits and external devices as described
in the last column.
8. Check all wiring for correct connections, tight termi-
nal screws, correct wire and proper wiring tech-
niques.
9. Replace all damaged or incorrectly sized wires.
10. Replace faulty controllers, limits, interlocks, actua-
tors, valves, transformers, motors and other devices
as required.
11. Make sure normal operation is obtained for each
required test before continuing the checkout.
12. After completing each test, be sure to remove the
test jumpers.
Explosion Hazard. Can cause serious injury or
death. Be sure all manual fuel shutoff valves are
closed.
Table 6. Static Checkout
Test
No.
Test
Jumpers
Voltmete
r Normal Operation
If Operation is Abnormal,
Check the Items Listed Below
1 None 4-L2 Line voltage at
terminal 4.
1. Master switch.
2. Power connected to the master switch.
3. Overload protection (fuse, circuit breaker, etc.) has not
opened the power line.
2 4-21 6-L2 Line voltage at
terminal 6.
1. Stop station.
2. Alarm silencing relay.
3 4-10 - Push Start pushbutton
and ignition sparks.
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
c. Damper not at low fire position.
d. Low Fire Switch.
44-8- Automatic pilot valve
opens.
1. Listen for click or feel head of valve for activation.
a. Actuator if used.
b. Pilot valve.
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