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Mfg No. 164771, Page 17
TYPICAL WIRING DIAGRAMS
Figure 17 - Typical Wiring Diagram for Model CAUA with Direct-Drive Blower Motor(s)
208 OR 230/1/60
GRD
G
BK
OPTIONAL DISCONNECT SWITCH
CONTACTS
HEAT SPEED
W
MOTOR
BLOWER
L1
L2
PROTECTED
INHERENTLY
COOL SPEED CONTACTS
BL
BK
W
BL
W
BK
BK
W
INHERENTLY
PROTECTED
BLOWER
MOTOR
G
GRD
BL BL
BK
BK
W
W
WW
BK
BK
W
W
VENTER MOTOR
40 VA. CONTROL
BK
BL
24V
LINE VOLT
BR
TRANSFORMER
Y
CMB
ACB HEAT
LINE
GROUND
VALVE
PSW
HI LIMIT
HI LIMIT
PRESSURE SWITCH
HIGH
LIMIT
W
G
R
24VAC
DSI CONTROL
FLAME SENSING
PROBE
FLAME SENSE
IGNITOR
HV LEAD
LED CODES
SLOW FLASH NORMAL OPERATION - NO CALL FOR HEAT
FAST FLASH NORMAL OPERATION - CALL FOR HEAT
2 FLASHES SYSTEM LOCKOUT - FAILED TO DETECT OR SUSTAIN FLAME
3 FLASHES PRESSURE SWITCH OPEN OR CLOSED
4 FLASHES HIGH LIMIT OPEN
5 FLASHES FLAME SENSED AND GAS VALVE NOT ENERGIZED
STEADY ON INTERNAL FAILURE (MICRO-CONTROLLER FAILURE: SELF CHECK)
FIELD CONTROL WIRING
150'
250'
350'
75'
125'
175'
#18 GA. WIRE
#16 GA. WIRE
#14 GA. WIRE
TOTAL WIRE
LENGTH
DISTANCE FROM
UNIT TO CONTROL
MIN. RECOMMENDED
WIRE GUAGE
ROLLOUT
LED
BK
BK
BL
BL
BL
BL
R
Y
Y
R
BR
BK OR BR
BK
BK OR BL
BR
R
FIELD WIRING
OPTIONAL FACTORY WIRING
FACTORY WIRING
WHITE - W
PURPLE - PR
BLUE - BL
GREEN - G
YELLOW - Y
ORANGE - O
RED - R
BROWN - BR
BLACK - BK
WIRING CODE
BR
R
CHASSIS GRND.
BURNER GROUND
IN
OUT
VAC HOT
HOT
IN
BLWR AUX
L2
L2
L2
L1
L1
1
1
1
7
7
7
7
Y
2
2
CNO
NC
FLAME
ROLLOUT SWITCH
Y
CONTACTOR COIL
W
BK
ACB COOL
COOL SPEED
HEAT SPEED
CONTACTOR COIL
MAIN TERMINAL BLOCK
UNIT TERMINAL STRIP
THERMOSTAT TERMINAL STRIP
BR
Y
3
DOOR SWITCH
BLBL
BL
Y1
Y2
W1
W2
SET ANTICIPATOR AT 0.6 AMPS
T87F THERMOSTAT Q539A SUBBASE
W
Y
R
G
C
R
G
Y
BK
R
BL
R
BK
Y
BL
TERMINAL STRIP
THERMOSTAT
R
C
COOL RELAY COIL
CUSTOMER'S
MOTOR WIRE COLORS
WHITE - NEUTRAL
BLACK - HIGH SPEED
BLUE - MEDIUM SPEED
RED - LOW SPEED
R R
(SEE NOTE #7)
(SEE NOTE #8)
W
(DO NOT USE WITH 208V)
(SEE NOTE)
BR
BL
BK
ALTERNATE W.R. OR ROBERTSHAW
BY-PASS GAS VALVE
PLUG PILOT OUTLET
P
MAIN
BL
PILOT
M
BR
C
OR PV
TH-TR
TH OR
BK
BY-PASS GAS VALVE
HONEYWELL
PILOT
MV
PLUG PILOT OUTLET
MAIN
TR OR
PV-MV
AG1 - AK2 OR AK3 - CL10 - DIRECT DRIVE
BABS
CAUA SERIES 150 - 400 DWG. # B-164607 REV #1
OPERATING SEQUENCE
1. SET THERMOSTAT SYSTEM SWITCH AT "OFF" POSITION, FAN SWITCH AT "AUTO" POSITION.
2. TURN ON MANUAL GAS VALVE.
3. TURN ON POWER TO UNIT.
5. THERMOSTAT CALLS FOR HEAT, ENERGIZING THE VENTER MOTOR.
6. VENTER PRESSURE SWITCH CLOSES, FIRING UNIT.
7. BURNER FLAME IS SENSED, AND IN 30 SECONDS THE BLOWER MOTOR IS ENERGIZED.
8. IF THE FLAME IS EXTINGUISHED DURING MAIN BURNER OPERATION, THE INTEGRATED CONTROL SYSTEM
CLOSES THE MAIN VALVE AND MUST BE RESET BY INTERRUPTING POWER TO THE CONTROL CIRCUIT
(SEE LIGHTING INSTRUCTIONS).
NOTES
1. THE FOLLOWING CONTROLS ARE FIELD INSTALLED OPTIONS: THERMOSTAT
2. DOTTED WIRING AND COOL RELAY COIL INSTALLED BY OTHERS.
3. CAUTION: IF ANY OF THE ORIGINAL WIRING AS SUPPLIED WITH THE
APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL
HAVING A TEMPERATURE RATING OF AT LEAST 105° C. EXCEPT FOR SENSOR
LEAD WIRE WHICH MUST BE 150° C.
4. USE 18 GA. WIRE FOR CONTROL WIRING ON THE UNIT.
6. LINE AND FAN MOTOR BRANCH WIRE SIZES SHOULD BE OF A SIZE TO PREVENT
VOLTAGE DROPS BEYOND 5% OF SUPPLY LINE VOLTAGE.
5. USE 14 GA. WIRE FOR LINE AND MOTOR WIRING ON UNIT.
4. SET THERMOSTAT SYSTEM SWITCH AT "HEAT" POSITION; FAN SWITCH AT "AUTO" POSITION.
9. SET THERMOSTAT SYSTEM SWITCH AT "COOL" POSITION, FAN SWITCH AT "AUTO" POSITION.
(A) ON A CALL FOR COOLING, BLOWER MOTOR IS ENERGIZED AT HIGH SPEED AND COOLING
CIRCUIT IS ENERGIZED.
11. SET THERMOSTAT SYSTEM SWITCH AT "OFF" POSITION, FAN SWITCH AT "AUTO" POSITION, FOR SHUTDOWN..
10. WHEN BLOWER DOOR IS OPENED, THE UNIT IS SHUTDOWN.
7. SECOND BLOWER MOTOR ON 250-400 UNITS ONLY.
8. VENTER MOTOR ON 350-400 UNITS HAS BROWN AND BLUE WIRES.
9. ON 208/230V. UNITS THE CONTROL TRANSFORMER HAS A DUAL VOLTAGE PRIMARY.
FOR 208V. UNITS USE BLACK AND RED LEADS (CAP YELLOW)
.
FOR 230V. UNITS USE BLACK AND YELLOW LEADS (CAP RED).
10. WHEN PROVIDING OR REPLACING FUSES IN THE FUSIBLE DISCONNECT SWITCH
USE DUAL ELEMENTS TIME DELAY FUSES AND SIZE ACCORDING TO
TIMES THE MAXIMUM TOTAL INPUT AMPS.