Reznor B Unit Installation Manual - Manual (Page 28)

Form I-F/B, P/N 98126 R21, Page 28
B125-250 (BELT DRIVE):
AH3-CH1-CL21(BLOWER)-CL1 WD 274783
FAN CONTROL
BK
L1
(HOT)
BK
BK
R
24V
LINE VOLT
BR
R
Y
R
W
GROUND TERMINAL
(TERMINAL STRIP)
L2
(COM)
115/1/60, 208/1/60 OR 230/1/60
BR
R
SET ANT
. A
T 0.8 AMPS
OPTIONAL SINGLE ST
A
GE
THERMOST
AT
W
R
W1
Y Y
LIMIT
CONTROL
Y
R
PR
FIELD WIRING TERMINAL STRIP FA
CT
OR
Y WIRING
W
W BK
BK
GRD
G
BLOWER MOTOR
W BK
BR
BLOCKED VENT
MANUAL RESET
SWITCH
Y
CONTROL
TRANSFORMER
BK
AL
TERNA
TE HONE
Y
WELL
REDUNDANT
GAS V
AL
VE
BL
PIL
O
T
OR PV
TH-TR
TH OR
MV
BR PV-MV
TR OR
MAIN
PIL
O
T
W
.R.
OR R
OBER
TSHA
W
REDUNDANT
GAS V
AL
VE
P
MAIN
M
C
R
BL
BK
IGNITION
CONTROLLER PROBE
GRD
SPARK
FLAME SENSING
24V MV/PV
GND BURNER
24V GND
MV
SENSE
TH
PV
G
UNIT CHASSIS
GROUND
OPTIONAL VENT DAMPER
FIELD INSTALLED
BR
BK
BR R
BLOWER RELAY
4
CONTACTS
2
BK BK
BK BK
S/W SWITCH
OPTIONAL
COIL
BLOWER RELAY
3 1
PR PR
WHITE - W
PURPLE - PR
BLUE - BL
GREEN - G
YELLOW - Y
ORANGE - O
RED - R
BROWN - BR
BLACK - BK
WIRING CODE
WIRE CONNECTOR
CRIMP TERMINAL
OPTIONAL FIELD WIRING
OPTIONAL FACTORY WIRING
FACTORY WIRING
FIELD WIRING
NOTES
- THE FOLLOWING CONTROLS ARE FIELD INSTALLED OPTIONS:
THERMOSTAT, S/W SWITCH AND BLOWER RELAY
- THE FOLLOWING CONTROLS ARE FACTORY INSTALLED OPTIONS:
NONE
- DOTTED WIRING INSTALLED BY OTHERS.
- USE #14 GA WIRE FOR BLOWER MOTOR CIRCUIT WIRING ON UNIT.
- USE #18 GA WIRE FOR ALL WIRING EXCEPT BLOWER MOTOR CIRCUIT.
- LINE AND BLOWER MOTOR BRANCH WIRE SIZES SHOULD BE OF A SIZE TO
PREVENT VOLTAGE DROPS BEYOND 5% OF SUPPLY LINE VOLTAGE.
- SEE INSTALLATION INSTRUCTIONS FOR GREATER DETAIL.
ON 115V. UNITS THE CONTROL TRANSFORMER IS A SINGLE VOLTAGE PRIMARY.
- ON 230V. UNITS THE CONTROL TRANSFORMER HAS A DUAL VOLTAGE PRIMARY.
FOR 115V. UNITS USE BLACK AND YELLOW LEADS.
FOR 208V. UNITS USE BLACK AND RED LEADS (CAP YELLOW).
FOR 230V. UNITS USE BLACK AND YELLOW LEADS (CAP RED).
A TEMPERATURE RATING OF AT LEAST 105 DEGREES C., EXCEPT FOR SENSOR
MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING
- CAUTION: IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE
LEAD WIRE WHICH MUST BE 150 DEGREES C.
OPERATING SEQUENCE
- SET THERMOSTAT AT LOWEST SETTING.
- TURN ON MAIN AND PILOT MANUAL GAS VALVES.
- TURN ON POWER TO UNIT.
- SET THERMOSTAT AT DESIRED TEMPERATURE.
- THERMOSTAT CALLS FOR HEAT FIRING UNIT AT FULL RATE AFTER
- SET THERMOSTAT AT LOWEST SETTING FOR SHUTDOWN.
PILOT PROVING SEQUENCE.
- BLOWER OPERATES OFF THE HEAT EXCHANGER TEMPERATURE.
- FOR CONTINUOUS BLOWER OPERATION SET S/W SWITCH AT "ON" POSITION.
- IF THE FLAME IS EXTINGUISHED DURING MAIN BURNER OPERATION,
THE SAFETY SWITCH CLOSES THE MAIN VALVE. IF THE PILOT IS
NOT ESTABLISHED WITHIN 120 SEC. THE UNIT LOCKS OUT FOR
ONE HOUR, UNLESS IT IS RESET BY INTERRUPTING POWER TO
THE CONTROL CIRCUIT. (SEE LIGHTING INSTRUCTIONS)
FIGURE 32 - Blower-type, Gravity-Vented, Model B Sizes 50-250 with Intermittent Spark Pilot, Single
Stage Heating, Natural or Propane, Belt Drive
7. Electrical
Supply and
Wiring (cont'd)
7.4 Typical Wiring Diagrams (cont'd)