Honeywell RM7800L1087 - Page 5

RM7800L1087; RM7840G1022,L1075; EC7840L1014 RELAY MODULES WITH VALVE PROVING
5 66-1162—2
Table 2. Recommended Grounding Practices.
Table 3. Terminal Ratings.
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
220/240 Vac to 120 Vac, 10 VA (minimum) stepdown transformer (not provided) must be used to drive the shutter.
Ground Type Recommended Practice
Earth ground (subbase and relay
module).
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
15A 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 protected against corrosion on mating surfaces.
Signal ground (KDM, Data ControlBus
Module™, Communications Interface
ControlBus™ Module).
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.
Terminal No. Description
Ratings
120 Vac 220/230/240 Vac
G
Flame Sensor Ground
a
——
Earth G Earth Ground — —
L2(N) Line Voltage Common — —
3 Alarm 1A pilot duty
120 Vac (+10%/-15%),
50 or 60 Hz (±10%)
220-240 Vac (+10%/-15%),
50 or 60 Hz (±10%)
4
Line Voltage Supply (L1)
b
5 Burner Motor 9.8 AFL, 58.8 ALR (inrush) 4A at PF = 0.5, 20A Inrush
6 Burner Controller and Limits Demand (NOT Valve Proving) 1 mA 1 mA
7 Lockout/Running Interlock 8A run, 43A inrush 8A run, 43A inrush —
8 Pilot Valve/Ignition
c
4A at PF = 0.5, 20A Inrush
9 Main Fuel Valve
c
4A at PF = 0.5, 20A Inrush
10 Ignition
c
2A at PF = 0.2
F(11) Flame Sensor 60 to 220 Vac,
current limited
60 to 220 Vac,
current limited
12 Firing Rate High Fire 75 VA pilot duty 0.5A at PF = 0.5
13 Firing Rate Common 75 VA pilot duty 0.5A at PF = 0.5
14 Firing Rate Low Fire 75 VA pilot duty 0.5A at PF = 0.5
15 Firing Rate Modulate 75 VA pilot duty 0.5A at PF = 0.5
16 Valve Proving Switch 1 mA 1 mA
17 Demand — Valve Proving 1 mA 1 mA
18 Low Fire Switch Input 1 mA 1 mA
19 High Fire Switch Input (7800/40L only) 1 mA 1 mA
20 Pre-Ignition Interlock Input 1 mA 1 mA
21 Interrupted/Intermittent Pilot Valve/First Stage Oil Valve
or MV2
c
4A at PF = 0.5, 20A Inrush
22 Shutter 0.5A
d