RM7838B, RM7838C 7800 SERIES RELAY MODULES
32-00211—01 8
STATIC CHECKOUT
After checking all wiring, perform this checkout before
installing the RM7838B,C on the subbase. These tests
verify the Q7800 Wiring Subbase is wired correctly, and
the external controllers, limits, interlocks, actuators,
valves, transformers, motors and other devices are
operating properly.
Explosion and Electrical Shock Hazards.
Can cause serious injury, death or equipment
damage.
Close all manual fuel shutoff valve(s) before
starting these tests.
Use extreme care while testing the system. Line
voltage is present on most terminal connections
when power is on.
Open the master switch before installing or removing a
jumper on the subbase. Before continuing to the next test,
be sure to remove test jumper(s) used in the previous test.
Replace all limits and interlocks that are not operating
properly. Do not bypass limits and interlocks.
Electrical Hazard.
Can cause equipment damage.
Do not perform a dielectric test with the
RM7838B,C installed. Internal surge protectors
break down and conduct current, causing dielectric
test failure and destruction of the internal lightning
and high current protection.
Equipment Recommended
1. Voltmeter (1M ohm/volt minimum sensitivity) set on
the 0-300 Vac scale.
2. Two jumper wires; using No. 14 wire, insulated, 12 in.
(304.8 mm) long with insulated alligator clips at
both ends.
3. Ammeter can be used to verify loads (e.g. valves,
ignition transformers) connected to the wiring sub-
base.
General Instructions
1. Perform all applicable tests listed in the Static
Checkout, Table 3, in the order listed.
2. Make sure all manual fuel shutoff valves are closed.
3. Perform only those tests designated for the specific
RM7838B,C model being tested.
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. Replace all damaged or incorrectly sized
wires.
9. Replace faulty controllers, limits, interlocks, actua-
tors, valves, transformers, motors and other devices,
as required.
10. Make sure normal operation is obtained for each
required test before continuing the checkout.
11. After completing each test, be sure to remove the
test jumper(s).
Explosion Hazard.
Can cause serious injury or death.
Make 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 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 None 6-L2 Close burner control.
Recirculating exhaust
blower fan starts, then line
voltage at terminal 6.
1. Recirculating/exhaust blower fan.
2. Limits.
3. Stop Switch.
4. Burner Control.
5. Recirculating AFS.
2a None 4-20 Line voltage at terminal 20. Preignition Interlock.
2b None 4-16 Line voltage at terminal 16. Valve Proving Switch.
3 None 21-L2 With test 2 still running,
press Start Switch. 120 Vac
is present at terminal 21.
Start Switch.
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