Filter
Top Products
7800 SERIES RM7824A RELAY MODULE
65-0155—1
12
Table 4. Site-Configurable Jumper Options.
Jumper
Number Description Intact Clipped
JR1 Pilot Flame
Establishing Period
10 seconds 4 seconds
IMPORTANT
After 200 hours of operation, the configuration
jumper cannot be changed. If it is changed after
200 hours of operation, the RM7824A locks out. The
RM7824A cannot be reset and has to be replaced.
SERVICE NOTE: Clipping and removing a site-configurable
jumper enhances the level of safety.
STATIC CHECKOUT
CAUTION
1. Use extreme care while testing the system. 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.
Equipment Recommended
1. Voltmeter (20K ohm/volt minimum sensitivity) set on the
0-30 Vdc scale.
2. Two jumper wires: No. 14 wire, insulated, 12 in. (305 mm)
long, with insulated alligator clips at both ends.
General Instructions
1. Perform all applicable tests listed in Static Checkout,
Table 5, in the order listed.
2. MAKE SURE THAT ALL MANUAL FUEL SHUTOFF
VALVE(S) ARE CLOSED.
3. Perform only those tests designated for the specific
RM7824A model being tested.
4. Raise the set point of the operating controller to
simulate a
call for heat
.
5. For each test, open the master switch and install the
jumper wire(s) between the subbase wiring terminals
listed in the Test Jumpers column of Table 5.
6. Close the master switch before observing operation.
7. Read the voltage between the subbase wiring terminals
listed in the Voltmeter column of Table 5.
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 terminal
screws, correct wire, and proper wiring techniques.
Replace all damaged or incorrectly sized wires.
10. Replace faulty controllers, limits, interlocks, actuators,
valves, transformers, motors and other devices as
required.
11. Obtain normal operation for each required test before
continuing the checkout.
12. After completing each test, be sure to remove the test
jumper(s).
Table 5. Static Checkout.
Test No.
RM7824A
Models
Test
Jumpers Voltmeter Normal Operation
If Operation is Abnormal, Check
the Item Listed Below
WARNING
Make sure all manual fuel shutoff valves are closed.
IMPORTANT
Low fuel pressure limits, if used, could be open. Bypass them with jumpers for the remaining Static tests (if required).
1 All None 3-L2 24 Vdc at terminal 3 1. Master switch.
2. Power connected to the master
switch.
3. Overload protection (fuse,
circuit breaker) has not opened
the power line.
2 All None 6-L2 24 Vdc at terminal 6 1. Limits.
2. Burner controller.
3 All 3-10 — Ignition spark (if ignition
transformer relay is
connected to terminal 10).
1. Watch for spark or listen for
buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
(Continued)