Principal Technical Features - Honeywell RM7895A1014 Installation Instructions Manual

RM7895A,B,C,D/EC7895A,C; RM7896A,C,D 7800 SERIES RELAY MODULES
Relay
Test Module
Number Model Jumpers
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
adequate clearance for servicing, installation and
removal of the RM7895A,B,C,D/EC7895A,C;
RM7896A,B,C,D, KDM, flame amplifier, flame ampli-
fier 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 mount-
ing.
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 subbase 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—01
Table 6. Static Checkout. (Continued)
Test
Voltmeter
— 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
— 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.
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
system being tested.
4. Mount the RM7895A,B,C,D/EC7895A,C;
RM7896A,B,C,D by aligning the four L-shaped cor-
ner guides and knife blade terminals with the bifur-
cated 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
system components.
PRINCIPAL TECHNICAL
FEATURES
The RM7895 provides 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.