Static Checkout; Equipment Recommended; General Instructions - Honeywell 7800 SERIES Installation Instructions Manual

RM7838A 7800 SERIES RELAY MODULES

STATIC CHECKOUT

After checking all wiring, perform this checkout before
installing the RM7838A on the subbase. These tests verify
that the Q7800 Wiring Subbase is wired correctly and that the
external controllers, limits, interlocks, actuators, valves,
transformers, motors and other devices are operating
properly.
WARNING
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
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 jumpers used in the previous test.
5. Replace all limits and interlocks that are not
operating properly. Do not bypass limits and
interlocks.
CAUTION
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.
Test
No. Test Jumpers
1 None
2 4-21
3 4-10
4 4-8
5 4-9
6 4-3
66-1087—2
Table 7. Static Checkout.
Voltmeter Normal Operation
4-L2 Line voltage at terminal 4.
6-L2 Line voltage at terminal 6.
— Push Start pushbutton and
ignition sparks.
— Automatic pilot valve opens.
— Automatic main fuel valve(s)
opens.
— Alarm (if used) turns on.

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.

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 simulate
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 terminals
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 terminal
screws, correct wire and proper wiring techniques.
9. Replace all damaged or incorrectly sized wires.
10. Replace faulty controllers, limits, interlocks, actuators,
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.
WARNING
Explosion Hazard.
Can cause serious injury or death.
Be sure all manual fuel shutoff valves are closed.
If Operation is Abnormal,
Check the Items Listed Below
1. Master switch.
2. Power connected to the master switch.
3. Overload protection (fuse, circuit breaker,
etc.) has not opened the power line.
1. Stop station.
2. Alarm silencing relay.
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.
1. Listen for click or feel head of valve for
activation.
a. Actuator if used.
b. Pilot valve.
1. Listen for and observe operation of the main
fuel valve(s) and actuator(s).
2. Valve(s) and actuator(s).
1. Alarm.
6
(continued)