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

Relay modules
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Final Wiring Check

1. Check the power supply circuit. The voltage and
frequency tolerance must match those of the
RM/EC7890. A separate power supply circuit can be
required for the RM/EC7890. Add the required
disconnect means and overload protection.
2. Check all wiring circuits and complete the Static
Checkout in Table 7 before installing the
RM/EC7890 on the subbase.
3. Install the relay module.
4. Restore the panel power.


After checking all wiring, perform this checkout before
installing the RM/EC7890 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 Hazard.
Can cause serious injury, death or equipment
1. Close all manual fuel shutoff valve(s) before
starting these tests.
2. Use extreme care while testing the system. Line
voltage is present on most terminal connections
when power is on.
3. Open the master switch before installing or
removing a jumper on the subbase.
4. Before continuing to the next test, be sure to
remove test jumper(s) used in the previous test.
5. Replace all limits and interlocks that are not
operating properly. Do not bypass limits and
Equipment Damage Hazard.
Can cause equipment damage or equipment
Do not perform a dielectric test with the
RM/EC7890 installed. Internal surge protectors
break down and conduct a current, causing the
RM/EC7890 to fail the dielectric test or possibly
destroy the internal lightning and high current

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. Note that an ammeter can be used in
place of a jumper to confirm current draw of loads.
(ignition, pilot valve and main valve).

General Instructions

1. Perform all applicable tests listed in the Static
Checkout, Table 6, in the order listed.
2. Make sure all manual fuel shutoff valves are closed.
3. For each test, open the master switch and install the
jumper wires between the subbase wiring terminals
listed in the Test Jumpers column.
4. Close the master switch before observing the opera-
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 proper connections, tight termi-
nal screws, and appropriate wire and wiring tech-
8. 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.
Be sure all manual fuel shutoff valves are closed.
Low fuel pressure limits, if used, could be open.
Bypass them with jumpers for the remaining static
tests (if required).


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