Reznor UDBS Unit Installation Manual - Manual (Page 24)

Form I-UDB, P/N 202658 R14, Page 24
FIGURE 18C - Typical Wiring Diagram for Model UDBP or Model UDBS,
Sizes 150-400, Single Stage
AG1-AN2-CL1 OR CL22
UDBP & UDBS SERIES 150-400
WD# 186204 REV #3
VENTER
CONTACTOR COIL
PRESSURE SWITCH
SPARK GAP
GREEN LED
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
LED
Y Y
OPTIONAL FIELD WIRING
FIELD WIRING
OPTIONAL FACTORY
FACTORY WIRING
DSI CONTROL
FAST FLASH
1 FLASH
2 FLASH
3 FLASH
4 FLASH
STEADY OFF
LED FLASH CODES
NORMAL OPERATION CALL FOR HEAT
IN LOCKOUT FROM FAILED IGNITIONS OR FLAME LOSSES
PRESSURE SWITCH DOES NOT CLOSE WITHIN 30 SECONDS
LIMIT SWITCH OPEN
PRESSURE SWITCH IS CLOSED BEFORE VENTER IS ENERGIZED
INTERNAL CONTROL FAULT OR NO POWER
YELLOW LED
FLAME SENSED STEADY ON
SLOW FLASH WEAK FLAME
UNDESIRED FLAME (VALVE OPEN & NO CALL FOR HEAT) FAST FLASH
IND
BK
NEUTRAL
W
MOTOR
LED
OK FLAME
G Y
NEUTRAL
BK W
LIMIT CONTROL
R R
R
R
BR
FLAME
ELECTRODE
FLAME
GROUND
P1-8
P1-3
P1-6
P1-5
P1-7
P1-9
BK
W
GAS VALVE
BL BR P1-2
P1-4 BL
24V
115/208/230
Y
BK
BR
R
L1 NEUTRAL NEUTRAL L1 COM SEC
SYSTEM TRANSFORMER
EAC/BLO
WIRING
OF VENTER ENERGIZED
V
O
LT
BK
AT
O OR A
TC
3.0 AMP
C
R
W
G
Y
R
W1
TERMINAL STRIP
R
Y
PR
P3-4
P3-3
P3-2
NORMAL OPERATION NO CALL FOR HEAT STEADY ON
G
GRD
LUG
40 VA
CAPACITOR
(SEE NOTE #6)
BR
BR/W
SPARK
TRANSFORMER
G
P3-5
P3-1
WIRING CODE
BLACK - BK
BROWN - BR
RED - R
ORANGE - O
YELLOW - Y
GREEN - G
BLUE - BL
PURPLE - PR
WHITE - W
Y
W
FUSE
(UDBS ONLY)
R
DOOR INTERLOCK
BLOWER MOTOR
G
GRD
208-230/3/60
LINE/1/60
OR
CUSTOMER'S
DISCONNECT SWITCH
R
R OR W
R OR BK
L3
L1 T1
T3
CONTACTOR CONTACTS
BLOWER MOTOR
L2 T2
MOTOR
INTERNALLY
BLOWER
PROTECTED
C
ONTR
OL SWIT
CH
Y
(UDBS ONL
Y
)
2
3
Y
BK
5
6
BK
W2
(OPT CL1) SINGLE ST
A
GE
THERMOST
AT
WITH F
AN SWIT
CH (SET ANT
. A
T 0.6 AMPS)
R
W
G
WITH F
AN SWIT
CH (SEE NO
TES #7
THR
U #9)
(OPT CL22)
TWO ST
A
GE DIGIT
AL
THERMOST
AT
RC
R
R
W2
G
W1
W1
G
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. CAPACITOR IS REMOTE MOUNTED.
OPERATING SEQUENCE
1. SET THERMOSTAT AT LOWEST SETTING; FAN SWITCH
2. TURN ON MANUAL GAS VALVE.
3. TURN ON POWER TO UNIT.
4. SET THERMOSTAT AT DESIRED SETTING.
6. THERMOSTAT CALLS FOR HEAT, ENERGIZING THE VENTER MOTOR.
7. VENTER PRESSURE SWITCH CLOSES, FIRING UNIT AT FULL RATE.
8. BURNER FLAME IS SENSED, AND IN 30 SECONDS THE BLOWER
MOTOR IS ENERGIZED.
9. 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).
10. SET FAN SWITCH AT "ON" POSITION FOR CONTINUOUS BLOWER
AT "AUTO" POSITION.
OPERATION.
5. LOW STAGE OF THERMOSTAT ENERGIZES THE BLOWER
MOTOR FOR AIR RE-CIRCULATION.
7. VERIFY JUMPER ON CL22 THERMOSTAT TERMINALS R TO RC.
8. FAN SWITCH OR LOW STAGE OF CL22 THERMOSTAT ENERGIZES THE BLOWER MOTOR.
9. HIGH STAGE OF CL22 THERMOSTAT INITIATES A CALL FOR HEAT.
USE DUAL ELEMENTS TIME DELAY FUSES AND SIZE ACCORDING TO 1.25
TIMES THE MAXIMUM TOTAL INPUT AMPS.
10. WHEN PROVIDING OR REPLACING FUSES IN THE FUSIBLE DISCONNECT SWITCH
11. DISCONNECT SWITCH IS FIELD FURNISHED OR AVAILABLE FROM FACTORY AS AN OPTION.
7.0 Electrical Supply and Wiring (cont’d)
7.4 Wiring Diagrams
(cont’d)