Assembly - Honeywell 7800 Series Manual

Fig. 10—Wiring RM7840M.
WHITE
YELLOW
1 120V, 60 Hz POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
WHEN NO DAMPER MOTOR OR LOW FIRE SWITCH IS USED, JUMPER TERMINAL 14 TO TERMINAL 18, AND DO NOT
WIRE TERMINAL 15.
3 DO NOT WIRE TO ANY UNUSED TERMINALS.
MOUNTING RM7840
NOTE: For installation dimensions, see Figs. 1 or 2.
RELAY MODULE MOUNTING
1. Mount the RM7840 vertically, see Figs. 11 or 12, or
mount horizontally with the knife blade terminals pointing
downward. When mounted on the Q7800A, the RM7840
must be in an electrical enclosure.
G
L
2
120V ALARM
3
4
BURNER MOTOR
5
(BLOWER)
BURNER
6
CONTROLLER/LIMITS
RUNNING INTERLOCKS
7
(INC. AIR FLOW SWITCH)
10 SEC. INTERRUPTED
8
PILOT/IGNITION
MAIN FUEL
9
VALVE(S)
5 SECOND IGNITION
1
(EARLY SPARK
0
TERMINATION)
F
RECTIFYING FLAME
ROD, RECTIFYING
PHOTOCELL, OR INFRA-
RED (LEAD SULFIDE)
FLAME DETECTOR
OR
C7027A, C7035A, OR
BLUE
C7044A ULTRAVIOLET
FLAME DETECTOR
OR
C7012A,C,E,F OR
BLUE
C7076A,D ULTRAVIOLET
FLAME DETECTOR
WHITE
WHITE
BLACK
BLACK
Q7800
1
2
COMMON
1
3
1
2
4
DAMPER
MODULATE
(L1 1
MOTOR
)
5
1
6
1
2
7
2
LOW FIRE
1
START SWITCH
8
1
3
9
2 PREIGNITION
INTERLOCK
0
INTERMITTENT
2
PILOT
1
2
2
L1
(HOT)
L2
MASTER
SWITCH
FOR DIRECT SPARK IGNITION (OIL
OR GAS)
IGNITION
1
TRANSFORMER
0
1ST STAGE
2
FUEL VALVE
1
2ND STAGE
9
FUEL VALVE
(OPTIONAL)
L2
L1
L2
2. Select the location in the electrical enclosure. Be sure
to allow adequate clearance for servicing, installation and
removal of the RM7840, Dust Cover , flame amplifier, flame
amplifier signal voltage probes, electrical signal voltage
probes and electrical connections.
a. Allow an additional two inches below the RM7840
for the flame amplifier mounting.
b. Allow an optional three-inch minimum to both sides
of the RM7840 for electrical signal voltage probes.
15
RM7840E,G,L,M
WIRING • ASSEMBLY
1
T
O
L
2
M1980B

Assembly

65-0087—2