Principal Technical Features - Honeywell 7800 Series Installation Instructions Manual

RM7895A,B,C,D/EC7895A,C; RM7896A,C,D7800 SERIES Relay Modules
Test Relay
Number Module
Model
5 All 5-8
6 All 5-9
7 EC7895C; 5-21
RM7895C
,D;
RM7896C
,D
8 All 5-3
Final All
Mounting
RM7895A,B,C,D/EC7895A,C;
RM7896A,B,C,D Relay Module
1. Mount the RM7895A,B,C,D/EC7895A,C;
RM7896A,B,C,D vertically on the Q7800 Subbase
or mount horizontally with the knife blade terminals
pointing down. When mounted on the Q7800A, the
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D must be in
an electrical enclosure.
2. When mounting in an electrical enclosure, provide ade-
quate clearance for servicing, installation and removal of
the RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D, KDM,
flame amplifier, flame amplifier signal voltage probes,
electrical signal voltage probes and electrical connections.
a. Allow an additional two inches (51 mm) below the
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D for the
flame amplifier mounting.
b. Allow an optional three-inch (76 mm) minimum on both
sides of the
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D for
electrical signal voltage probes.
3. Make sure no subbase wiring is projecting beyond the
terminal blocks. Tuck in wiring against the back of the sub-
base so it does not interfere with the knife blade terminals
or bifurcated contacts.
IMPORTANT
The RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D must be
installed with a plug-in motion rather than a hinge action.
32-00156-03
Table 6: Static Checkout. (Continued)
Test Voltmeter
Jumpers
–
–
–
–
CAUTION
Equipment Damage Hazard.
Can cause equipment damage.
After completing these tests, open master switch and remove all test jumpers from subbase
terminals. Also remove bypass jumpers, if used, from low fuel pressure limits.
Normal Operation
1. Ignition spark (if ignition
transformer is connected to
terminal 8).
2. Automatic pilot valve opens (if
connected to terminal 8).
NOTE: Refer to wiring diagram of
system being tested.
Automatic fuel valve(s) open(s). If
using direct spark ignition, check
first stage fuel valve(s) instead of
pilot valve.
Automatic second stage main fuel
valve(s) open(s).
Alarm (if used) turns on.
4. Mount the RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D
by aligning the four L-shaped corner guides and knife
blade terminals with the bifurcated contacts on the wiring
subbase and securely tightening the two screws without
deforming the plastic.
Mounting Other System Components (Fig. 4)
Refer to the applicable specifications for mounting other sys-
tem components.

PRINCIPAL TECHNICAL FEATURES

The RM7895 and EC7895 Series provide all customary flame
safeguard functions as well as significant advancements in
safety, annunciation, and system diagnostics.
Safety Shutdown (Lockout) Occurs if:
1. INITIATE PERIOD
a. Purge card is not installed or removed.
b. Purge card is bad.
c. Configuration jumpers have been changed (after 200
hours)—Fault Code 110.
d. AC line power errors occurred, see Operation.
e. Four minute INITIATE period has been exceeded.
10
If Operation is Abnormal,
Check Items Listed Below
1. Watch for spark or listen for
buzz.
2. Listen for click or feel head of
valve for activation.
a. Actuator if used.
b. Pilot valve.
Same as test 5. If using direct
spark ignition, check first stage
fuel valve(s) instead of pilot valve.
1. Listen for and observe operation
of second stage main fuel valve(s)
and actuator(s).
2. Valve(s) and actuator(s).
1. Alarm.