Reznor SFT Unit Installation Manual - Manual (Page 16)

Form RZ -NA-I-SFT, Mfg No. 173474 (Rev 6), Page 15
Figure 10 - Wiring Diagram
No. 155142 Revision 3
Typical Wiring Diagram
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 SIZE
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
VENTER MOTOR
FAN MOTOR
30 VA. CONTROL
BK
BL 24V
115 VOLT
BR
TRANSFORMER
W
CMB
ACB HEAT
LINE
GROUND
VALVE
PSW
HI LIMIT
HI LIMIT
MAIN VALVE
PRESSURE SWITCH HIGH
LIMIT
SET
ANT
. A
T 0.6
AMPS
OPT
. SINGLE ST
AGE
THERMOST
AT
W
R
S/W SWITCH
OPTIONAL SP-ST
R
G
W
24VAC
L1
(HOT)
L2
(COM)
FLAME SENSING
PROBE
FLAME SENSE
IGNITOR
HV LEAD
ROLLOUT
LED
BK BK
BK
BL
BL BL
BL
R
Y
Y R
BR
BR
BK
BK BK
BK
BR
R
BL
BR
R
GRD
G
115/1/60
CHASSIS GRND.
BURNER GROUND
W
BK
BK
IN
OUT
VAC HOT
HOT
IN
BLWR AUX
L2
L2
L2
L1
L1
1
1
1
G
G
G
G
Y
2
2
(SEE NOTE 6)
BK
C NO
NC
FLAME
ROLLOUT SWITCH
MODELS 45-75 ONLY
DSI CONTROL
SW1
OPERATING SEQUENCE
1. SET THERMOSTAT AT LOWEST SETTING.
2. TURN ON MANUAL GAS VALVE.
3. TURN ON POWER TO UNIT.
4. SET THERMOSTAT AT DESIRED SETTING.
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 FAN
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).
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 OPEN CIRCUIT TO HIGH LIMIT OR FLAME ROLLOUT TERMINAL
5 FLASHES FLAME SENSED AND GAS VALVE NOT ENERGIZED
STEADY ON INTERNAL FAILURE (MICRO-CONTROLLER FAILURE: SELF CHECK)
NOTES
1. THE FOLLOWING CONTROLS ARE FIELD INSTALLED OPTIONS: THERMOSTAT
2. DOTTED WIRING 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 AND LIMIT WIRING WHICH MUST BE 150 C.
4. USE 18 GA. WIRE FOR ALL WIRING ON THE UNIT.
5. LINE AND FAN MOTOR BRANCH WIRE SIZES SHOULD BE OF A SIZE TO PREVENT
VOLTAGE DROPS BEYOND 5% OF SUPPLY LINE VOLTAGE.
6. THESE WIRE NUTS ARE NOT USED ON ALL MODELS.
THERMOSTAT AND S/W SWITCH
ON OFF 180 SECONDS
ON ON 240 SECONDS
OFF OFF 90 SECONDS
OFF ON 120 SECONDS (FACTORY SETTING)
1 2 FAN DELAY TO OFF
SW1
DIP SWITCH SETTINGS