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R7120D BURNER CONTROL MODULES
FLAME
DETECTOR
(UV)
LOCKOUT
ALARM
2
PURGE INTERLOCK
MAIN FUEL
VALVE(S)
PILOT
VALVE(S)
IGNITION
TRANSFORMER
11
12
1
LO
COM
AUTO
W
W
1
USED ONLY ON D10 OR EP100 SERIES PROGRAMMERS.
2
LOCATE THE PURGE INTERLOCK WIRE CONNECTION ON TERMINAL D, REMOVE AND CONNECT TO TERMINAL M.
R120D2000, JUMPER WIRE ADDED BETWEEN 8 AND M PROVIDES 30 MFEP ON TERMINAL 6, IF JR2 IS REMOVED.
3
Fig. 4. Internal block diagram of the R7120D3007 with pre-ignition interlocks.
66-1196EF—01
D10/EP100 OR D20/EP200
TYPICAL WIRING
S2
S1
A
2
8
7
3
6
5
13
12
1
FLAME MONITOR
TERMINALS
10
X
HI
135 OHM
FIRING RATE
B
R
MOTOR
135 OHM
R
B
CONTROLLER
RUNNING
INTERLOCK
X
1
P
LOW FIRE START
INTERLOCK
D
BURNER/
M
3
L2/N
L1/L
11
VALVE
PROOF OF
1
CLOSURE
10
1
1
11
12
10
X
AUTO
LO
COM
HI
F
4-20mA
CONTROLLER
6
BLOWER
MOTOR
MASTER
SWITCH
BURNER
SWITCH
LIMIT
OPERATING
SWITCHES
FLAME MONITOR
TERMINALS
4-20 mA
MOTOR
M32638
L2
L1
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