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CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL
20
10.7 CTUB/C Wiring Diagram (Models 75-115)
S 4563 C Honeywell
MEDIUM BLUE
L
N
E
A
B
4
5
6
7
8
9
COMBUSTION FAN
BROWN
RED
NC\P(2)
Pressure Switch
Detail
NO\P(3)
C \P(1)
BLACK
YELLOW
WHITE
PRESSURE SWITCH
BLUE
PINK
GREY
PURPLE
LOCKOUT
RUN
GREEN/YELLOW
BLACK
WHITE
YELLOW
GREEN/YELLOW
BROWN
BLUE
BROWN
BLUE
MAINS FILTER
BLACK
SENSE
IGNITION
BLACK
BROWN
BLUE
SITE WIRING
N L 1 2 3 7 8
REMOTE LOCKOUT RESET
REMOTE LOCKOUT INDICATION
THERMOSTAT
REMOTE FAN ON
LINE
NEUTRAL
GROUND
230 V
1 Ø
50 Hz
CENTRIFUGAL FAN 1
CENTRIFUGAL FAN 2
MEDIUM BLUE
LOW RED
RELAY
GREEN/YELLOW
WHITE N
HIGH BLACK
LOW RED
HIGH BLACK
WHITE N
GREEN/YELLOW
MEDIUM BLUE
LOW RED
GREEN/YELLOW
WHITE N
HIGH BLACK
CENTRIFUGAL FAN 3
models 100-115 only
Thermostat Limit
Thermodisc N/C
BROWN
Time Delay Relay
BLUE
BROWN
BROWN
LOCKOUT
RESET
NOTE:
Unused speed setting wires for the
centrifugal fan must be isolated and
insulated. If any of the original wire
supplied with the heater must be
replaced, it must be replaced with
wiring material having a temperature
rating of at least 105° C and 600 volts.