Honeywell 7800 Series Manual page 9
Integrated burner control
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Also See for 7800 Series:
- Product data (64 pages) ,
- Manual (56 pages) ,
- Installation instructions manual (40 pages)
PIN-OUT AND WIRE COLOR:
1 - ORANGE
2 - BLUE
3 - RED/BLACK
4 - GREEN/BLACK
5 - WHITE
DISPLAY
BU RNER
START
OPERATING
CONTROLLER
AND LIMITS
FLAME
SIGNAL
1
120V, 50/60 HZ POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
INSTALL A LINE VOLTAGE CONTROLLER IN SERIES WITH THE LIMITS. IF USING A LOW VOLTAGE CONTROLLER IS DESIRABLE, INSTALL
AN EXTERNAL RELAY WITH THE N.O. CONTACTS IN SERIES WITH THE LIMITS. THE LOW VOLTAGE RELAY COIL WILL BE IN THE LOW
VOLTAGE CONTROLLER CIRCUIT. NOTE THAT IT MAY BE NECESSARY TO PROVIDE AN EXTERNAL LOW VOLTAGE TRANSFORMER.
3
MAIN FUEL VALVE IS ENERGIZED DURING PFEP ONCE FLAME IS PROVEN.
MAXIMUM TIME TO ESTABLISH FLAME IS 10 SECONDS.
4
IMPORTANT
Do not run the CR7890 wiring with high voltage
ignition transformer wiring.
Combination
No.
1
a
2
3
4
5
6
7
a
Using this maximum combination derates the maximum ambient temperature to 135°F (57°C); 130°F (54°C) when using the
32006648-001 Accessory Cover.
32007181-001
INTERCONNECT CABLE
WITH BRAD HARRISON®
9-PIN CONNECTORS
1
6
7
5
2
8
9
3
4
6 - RED
7 - GREEN
8 - WHITE/BLACK
9 - BLACK
L1
(HOT)
L2
MASTER
1
SWITCH
00
SAFE-
LED
INITIATE
STANDBY
START
POWER
POWER
POWER
LIMITS AND BURNER CONTROL CLOSED
SAFE START CHECK
Fig. 7. Wiring diagram and operating sequence chart for CR7890.
Table 4. Combinations for Terminals 2, 4, and 8.
2
Pilot Fuel
C
B
F
F
D
D
D
CR7890B 7800 SERIES INTEGRATED BURNER CONTROL
LINE VOLTAGE
ALARM
BURNER
CONTROLLER/LIMITS
2
INTERMITTENT
PILOT/IGNITION
MAIN FUEL
VALVE(S)
IGNITION
RESET SWITCH
FLAME
ESTABLISHED
4
00
PFEP
RUN
POWER
POWER
PILOT
PILOT
FLAME
FLAME
MAIN
MAIN
ALARM
ALARM
4
IGNITION
8
INTERMITTENT PILOT
2
MAIN VALVE
9
TO
FLAME PROVING
4
Main
F
F
F
No Load
F
D
No Load
9
CR 7890B
RED/BLACK
3
ORANGE
1
WHITE/BLACK
8
BLUE
2
4
GREEN/BLACK
RED
6
BLACK
9
WHITE
5
GREEN
7
STANDBY
POWER
3
1
S S C
M17913D
Ignition
No Load
No Load
A
A
A
A
A
32007181-001
32007181-001
INTERCONNECT
INTERCONNECT
CABLE
CABLE
8
65-0259—1
