Final Wiring Check; Static Checkout; Equipment Recommended; General Instructions - Honeywell 7800 Series Installation Instructions Manual

RM7838B,C 7800 SERIES RELAY MODULE

FINAL WIRING CHECK

1. Check the power supply circuit. The voltage and fre-
quency tolerance must match those of the
RM7838B,C. (A separate power supply may be
required for the RM7838B,C.)
2. Add the required disconnect means and overload
protection.
3. Check all wiring circuits and complete the static
checkout in Table 3 before installing the RM7838B,C
on the subbase.
4. Install the relay module.
5. Restore power to the panel.

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.
WARNING
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.
CAUTION
Equipment Damage Hazard.
High voltage dielectric test 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.
32-00199—01

Equipment Recommended

Voltmeter (1M ohm/volt minimum sensitivity) set on the
0-300 Vac scale and two jumper wires; using No. 14 wire,
insulated, 12 in. (304.8 mm) long with insulated alligator
clips at both ends. An ammeter to test the load current
can replace one of the recommended jumpers in tests
verifying the combustion blower motor, ignition, pilot and
main valve operation.

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 valve(s) are
closed.
3. Perform only those tests designated for the specific
RM7838B,C model being tested.
4. Raise the setpoint of the operating controller to sim-
ulate a call for heat.
5. For each test, open the master switch and install the
jumper wires between the subbase wiring terminals
listed in the Test Jumpers column.
6. Close the master switch before observing operation.
7. Read the voltage between the subbase wiring termi-
nals listed in the Voltmeter column.
8. If there is no voltage or the operation is abnormal,
check the circuits and external devices as described
in the last column.
9. Check all wiring for correct connections, tight termi-
nal screws, correct wire, and proper wiring tech-
niques. 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 jumper(s).
WARNING
Explosion Hazard.
Can cause serious injury or death.
Make sure all manual fuel shutoff valves are closed.
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