Honeywell RM7800L1087 - Page 4

RM7800L1087; RM7840G1022,L1075; EC7840L1014 RELAY MODULES WITH VALVE PROVING
66-1162—2 4
Fig. 2. Internal block diagram of the RM7800L/40L, EC7840L (See Figs. 3, 4, 6 or 7 for individual detailed wiring
instructions).
Table 1. Recommended Wire Sizes and Part Numbers.
Application Recommended Wire Size Recommended Part Number(s)
Line voltage terminals 14, 16 or 18 AWG copper conductor, 600
volt insulation, moisture-resistant wire.
TTW60C, THW75C, THHN90C.
Keyboard Display Module (KDM) 22 AWG two-wire twisted pair with ground,
or five wire.
Belden 8723 shielded cable or
equivalent.
Data ControlBus Module™ 22 AWG two-wire twisted pair with ground,
or five wire.
Belden 8723 shielded cable or
equivalent.
Remote Reset Module 22 AWG two-wire twisted pair, insulated for
low voltage.
—
Communications Interface ControlBus™
Module
22 AWG two-wire twisted pair with ground. Belden 8723 shielded cable or
equivalent.
13 Vdc full-wave rectified transformer
power input.
18 AWG wire insulated for voltages and
temperatures for given application.
TTW60C, THW75C, THHN90C.
FLAME
DETECTOR
PLUG IN FLAME
AMPLIFIER
HIGH FIRE
SWITCH
PILOT
VALVE
MAIN
VALVE 1
LIMITS
CONTROLLER
DEMAND
DEMAND (VALVE
PROVING)
L1 (HOT) L2
PRE-IGNITION INTERLOCK
1K
5K
2K
LOW FIRE
SWITCH
6
20
17
4
7
4K
3K
6K
7K
2K
8
9
18
19
F
G
22
BLOWER
5
ALARM
INTERNAL
ELECTRONICS
3
L2
IGNITION
10
DETECTOR
SHUTTER
21
HIGH FIRE
15 SECOND INTERRUPTED OR MV2 IF VALVE PROVING DEMAND (T17) USED.
COMMON
MODULATE
LOW FIRE
12
13
15
14
INTERNAL RELAY OPTO FEEDBACK
FIELD WIRING
INTERNAL WIRING
M24162
VALVE PROVING SWITCH
AIR FLOW
SWITCH
16
1
1
RM7800L/RM7840L 120 VAC 50/60 HZ
EC7840L 220-240 VAC 50/60 HZ
2
2