Honeywell 7800 SERIES Manual page 14

RM7890A,B,C
ASSEMBLY
Fig. 11—Flame signal amplifier mounting.
Fig. 12—Flame detector wiring.
INFRARED (C7015)
F
G
ULTRAVIOLET (C7027/C7035/C7044)
3
F
1
G
SOLID STATE SELF-CHECKING
ULTRAVIOLET (C7012E,F)
F
2
G
22
L2
L1
L2
1 FLAME DETECTOR LEADS ARE COLOR CODED. THE BLUE LEAD MUST BE CONNECTED TO THE F TERMINAL AND THE WHITE
MUST BE CONNECTED TO THE G TERMINAL. THE UV SENSING TUBE IS POLARITY SENSITIVE. REVERSING THE LEADS EVEN
MOMENTARILY CAN DAMAGE OR DESTROY THE UV TUBE.
FLAME DETECTOR LEADS ARE COLOR CODED. THE BLUE LEAD MUST BE CONNECTED TO THE F TERMINAL AND THE YELLOW
2
MUST BE CONNECTED TO THE G TERMINAL. THE UV SENSING TUBE IS POLARITY SENSITIVE. REVERSING THE LEADS EVEN
MOMENTARILY CAN DAMAGE OR DESTROY THE UV TUBE.
3 DO NOT USE WITH RM7890C.
65-0126—2
WHITE
BROWN
BLUE
WHITE
BLUE
YELLOW
WHITE
WHITE
BLACK
BLACK
FLAME ROD
X
F
X
G
INSTALLING THE FLAME DETECTOR
NOTE: Table 2 and Fig. 12 list the flame detection systems
available for use with the RM7890. Make sure the correct
combination of amplifier and flame detector(s) is used.
Proper flame detector installation is the basis of a safe and
reliable flame safeguard installation. Refer to the Instructions
packed with the flame detector and the equipment manufac-
turer instructions.
Keep the flame signal leadwires as short as possible from
the flame detector to the wiring subbase. Capacitance in-
creases with leadwire length, reducing the signal strength.
The maximum permissible leadwire length depends on the
type of flame detector, leadwire and conduit. The ultimate
limiting factor in the flame detector leadwire is the flame
signal, see Table 5.
C7076A,D ULTRAVIOLET DETECTOR
REMOTE
SENSOR
6 F 7
3a 3b
5 G 8
2a
4 SHUTTER L1 1
3 SHUTTER L2 2
7800 SERIES
F G L2
SOLID STATE
ULTRAVIOLET (C7012A,C)
BLUE
F
YELLOW
2
G
3
BLACK
L1
BLACK
L2
PHOTOCELL
14
EARTH
2b
GROUND
C7076A
OR
C7076D
TERMINAL
BLOCK
L1 (HOT)
L2 (COMMON)
5 22
X
F
X
G
M9095