7800 SERIES EC7885A/RM7885A RELAY MODULE
65-0203
20
Fig. 18. Sequence status LEDs.
Table 3. LED sequence status display information.
SEQUENCE
STATUS
LEDs
RESET
PUSHBUTTON
CAPTIVE
MOUNTING
SCREW
DUST
COVER
RELAY
MODULE
FLAME
AMPLIFIER
M11177
Burner Sequence
LEDs Energized
INITIATE
POWER , PILOT, FLAME, MAIN and ALARM
STANDBY
POWER , PILOT, FLAME, MAIN and ALARM
STANDBY HOLD: F/G (Flame Detected)
POWER , PILOT, FLAME , MAIN and ALARM
SAFE-START CHECK
POWER , PILOT, FLAME, MAIN and ALARM
PILOT IGNITION
POWER , PILOT, FLAME , MAIN and ALARM
RUN
POWER , PILOT, FLAME , MAIN and ALARM
RESET/ALARM TEST
POWER , PILOT, FLAME, MAIN and ALARM
See Table 6 for further details of Hold conditions.
Static Checkout
CAUTION
1.
Use extreme care while testing the system. Line
voltage is present on most terminal connections
when power is on.
2.
Open the master switch before installing or
removing a jumper on the subbase.
3.
Before continuing to the next test, be sure to
remove the test jumper(s) used in the previous
tests.
4.
Replace all limits and interlocks not operating
properly. Do not bypass limits and interlocks.
5.
Close all manual fuel shutoff valve(s) before
starting these tests.
After checking all wiring, perform this checkout before
installing the 7885A 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.
NOTE:
Do not perform a dielectric test with the 7885A
installed. Internal surge protectors will break down
and conduct a current. This could cause the 7885A
to fail the dielectric test or possibly destroy the
internal lightning and high current transient
protection components.
Equipment Required
1. Voltmeter (1M ohm/volt minimum sensitivity) set on the
0-300 Vac scale.
2. Two jumper wires, no. 14 wire, insulated, 12 inches
(304.8 mm) long, with insulated alligator clips at both
ends.
General Instructions
1. Perform all applicable tests listed in this section, Table 4
in the order listed.
2. MAKE SURE THAT ALL MANUAL FUEL SHUTOFF
VALVE(S) ARE CLOSED.
3. For each test, open the master switch, remove the
jumper from the previous test and and install the jumper
wire(s) between the subbase wiring terminals listed in
the Test Jumpers column of Table 4.
4. Close the master switch before observing operation.
5. Read the voltage between the subbase wiring terminals
listed in the Voltmeter column of Table 4.
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 correct connections, tight terminal
screws, correct wire, and proper wiring techniques.
Replace all damaged or incorrectly sized wires.
8. Replace faulty controllers, limits, interlocks, actuators,
valves, transformers, motors and other devices as
required.
9. Obtain normal operation for each required test before
continuing the checkout.
10. After completing each test, be sure to remove the test
jumper(s).
