Honeywell 7800 Series Installation Instruction page 5

Ground Type
Earth ground (subbase and relay module).
Signal ground (KDM, Data ControlBus Module™,
Communications Interface ControlBus™ Module).
Terminal No.
G
Flame Sensor Ground
Earth G
Earth Ground
L2(N) Line Voltage Common
3 Alarm
4 Line Voltage Supply (L1)
5 Burner Motor
6 Burner Controller and Limits
7 Lockout/Running Interlock
8 Pilot Valve/Ignition
9 Main Fuel Valve
10 Ignition
F(11) Flame Sensor
12 Firing Rate High Fire
13 Firing Rate Common
14 Firing Rate Low Fire
15 Firing Rate Modulate
16 Unused
17 Unused
18 Low Fire Switch Input
19 High Fire Switch Input
20 Preignition Interlock Input
21 Interrupted/Intermittent Pilot Valve/First Stage Oil Valve
22 Shutter
a
. The relay module must have an earth ground providing a connection between the subbase and the control panel or the
equipment. The earth ground wire must be capable of conducting the current to blow the 15A fuse (or breaker) in event of an
internal short circuit. The relay module requires a low impedance ground connection to the equipment frame, which, in turn,
requires a low impedance connection to earth ground.
b
2000 VA maximum connected load to relay module assembly.
c
See tables 4 and 5.
d
RM7800G,M/RM7840G,M operating frequency determined by relay module selection.
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RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES
Table 2. Recommended Grounding Practices.
Use the shield of the signal wire to ground the device to the
signal ground terminals [3(c)] of each device. Connect the
shield at both ends of the chain to earth ground.
Table 3. Terminal Ratings.
Description
a
a
5
Recommended Practice
1. Use to provide a connection between the subbase and
the control panel of the equipment. Earth ground must be
capable of conducting enough current to blow the 20A fuse
(or breaker) in the event of an internal short circuit.
2. Use wide straps or brackets to provide minimum length,
maximum surface area ground conductors. If a leadwire
must be used, use 14 AWG copper wire.
3. Make sure that mechanically tightened joints along the
ground path are free of nonconductive coatings and pro-
tected against corrosion on mating surfaces.
—
—
—
120 Vac, 1A pilot duty.
120 Vac (+10%/-15%), 50 or 60 Hz (± 10%)
120 Vac, 9.8 AFL, 58.8 ALR (inrush).
120 Vac, 1 mA.
120 Vac, 8A run, 43A inrush.
c
120 Vac .
c
120 Vac .
c
120 Vac .
60 to 220 Vac, current limited.
120 Vac, 75 VA pilot duty.
120 Vac, 75 VA pilot duty.
120 Vac, 75 VA pilot duty.
120 Vac, 75 VA pilot duty.
—
—
120 Vac, 1 mA.
120 Vac, 1 mA.
120 Vac, 1 mA.
c
120 Vac .
120 Vac, 0.5A.
Ratings
b,d
66-1085—3