Static Checkout - Honeywell 7800 Series Manual

RM7840E,G,L,M
OPERATION • STATIC CHECKOUT
Fig. 22—Selectable site-configurable jumpers.
SELECTABLE CONFIGURATION JUMPERS
!
CAUTION
1. Use extreme care while testing the system.
Line voltage is present on most terminal con-
nections 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 RM7840 on the subbase. These tests verifies
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 RM7840
installed. Internal surge protectors will break down and
conduct a current. This could cause the RM7840 to fail
the dielectric test or possibly destroy the internal light-
ning and high current protection.
EQUIPMENT RECOMMENDED
1. Voltmeter (20 kohm/volt minimum sensitivity) set
on the 0-300 Vac scale.
RUN/TEST SWITCH
M7398
SERVICE NOTE: Clipping and removing a site-
configurable jumper enhances the level of safety.

Static Checkout

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 Static Check-
out, 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
RM7840 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.
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 ter-
minal screws, correct wire, and proper wiring techniques.
Replace all damaged or incorrectly sized wires.
10. Replace faulty controllers, limits, interlocks, actua-
tors, valves, transformers, motors and other devices as
required.
11. Obtain normal operation for each required test be-
fore continuing the checkout.
12. After completing each test, be sure to remove the
test jumper(s).
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