Honeywell 7800 Series Manual page 13

1. Do not run high voltage ignition transformer
wires in the same conduit with the flame detec-
tion wiring.
2. Do not route scanner wires in conduit with line
voltage circuits.
3. Enclose scanner wires without armor cable in
metal cable or conduit.
4. Follow directions given in the flame detector
Instructions.
7. Maximum wire lengths:
a. For RM7840, the maximum length of leadwire is
300 feet to terminal inputs (Control, Preignition
Interlock, Running/Lockout Interlock, High Fire
Switch and Low Fire Switch).
Fig. 8—Wiring RM7840G.
120V ALARM
BURNER MOTOR
(BLOWER)
BURNER
CONTROLLER/LIMITS
RUNNING INTERLOCKS
(INC. AIR FLOW SWITCH)
10 SEC. INTERRUPTED
PILOT/IGNITION
MAIN FUEL
VALVE(S)
5 SECOND IGNITION
(EARLY SPARK
TERMINATION)
RECTIFYING FLAME
ROD, RECTIFYING
PHOTOCELL, OR INFRA-
RED (LEAD SULFIDE)
FLAME DETECTOR
C7027A, C7035A, OR
WHITE
C7044A ULTRAVIOLET
FLAME DETECTOR
C7012A,C,E,F OR
YELLOW
C7076A,D ULTRAVIOLET
FLAME DETECTOR
1 120V, 60 Hz POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
MAIN FLAME ESTABLISHING PERIOD (MFEP).
2
DO NOT WIRE TO ANY UNUSED TERMINALS.
3
Q7800
G
L
2
3
4 (L1
)
5
6
7
8
9
1
0
F
OR
BLUE
OR
BLUE
WHITE
WHITE
L2
BLACK
L1
BLACK
L2
13
b. For flame detector leadwires, the maximum flame
sensor leadwire length is limited by the flame signal
strength.
8. Make sure loads do not exceed the terminal ratings.
Refer to the label on the RM7840 or to the ratings in
Specifications, see Table 1.
9. Check the power supply circuit. The voltage and
frequency tolerance must match those of the RM7840. A
separate power supply circuit may be required for the RM7840.
Add the required disconnect means and overload protection.
10. Check all wiring circuits and complete Static Check-
out, see Table 4, before installing the RM7840 on the
subbase.
11. Install all electrical connectors.
12. Restore power to the panel.
SERIES 90
FIRING RATE
SERIES 90
MOTOR
CONTROLLER
HIGH FIRE
1 B B
2
COMMON
1 R R
3
LOW FIRE
1 W W
4
MODULATE
1
5
1
3
6
1
7
LOW FIRE
1
START SWITCH
8
2
1
JUMPER WIRE FOR 30s MFEP
9
2 PREIGNITION
INTERLOCK
0
15 OR 30 SEC.
2
INTERRUPTED/
1
INTERMITTENT
PILOT VALVE
2
2
L1
(HOT)
1
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)
RM7840E,G,L,M
WIRING
L
2
M1978A
65-0087—2