Honeywell 7800 Series Manual page 18

RM7888A
ASSEMBLY
Fig. 17—Flame signal amplifier mounting.
Fig. 18—Flame detector wiring.
INFRARED (C7015)
WHITE
F
BROWN
G
ULTRAVIOLET (C7027/C7035/C7044)
F
1
G
SOLID STATE
SELF-CHECKING
ULTRAVIOLET
(C7012E,F)
BLUE
F
YELLOW
G
WHITE
2
22
WHITE
L2
BLACK
L1
BLACK
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.
2 FLAME DETECTOR LEADS ARE COLOR CODED. THE BLUE LEAD MUST BE CONNECTED TO THE F TERMINAL AND THE YELLOW
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.
65-0175
BLUE
WHITE
FLAME ROD
F
X
G
X
INSTALLING THE FLAME DETECTOR (FIG. 18)
NOTE: Table 2 lists the flame detection systems available
for use with the RM7888A. Make sure the correct combi-
nation 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 instruc-
tions packed with the flame detector and the equipment
manufacturer instructions.
Keep the flame signal leadwires as short as possible
from the flame detector to the wiring subbase. Capacitance
increases with leadwire length, decreasing 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 signal is the flame detector
leadwire, see Table 8.
C7076A,D ULTRAVIOLET DETECTOR
6 F
5
G
4 SHUTTER
3 SHUTTER
F G
SOLID STATE
ULTRAVIOLET
(C7012A,C)
BLUE
F
YELLOW
G
2
BLACK
L1
BLACK
L2
PHOTOCELL
18
REMOTE
SENSOR
7
EARTH
2b
3a 3b
GROUND
8
2a
L1 1
C7076A OR
C7076D
L2 2
TERMINAL
BLOCK
L1 (HOT)
L2 (COMMON)
7800 SERIES
L2 5 22
F
X
G
X
M1969B