Reznor B Unit Installation Manual - Manual (Page 29)

Form I-F/B, P/N 98126 R21, Page 29
FIGURE 33 - Blower-type, Gravity-Vented, Model B Sizes 165-400 with Intermittent Spark Pilot,
Single-stage Heating, Natural or Propane, Belt Drive, Blower Motor Contactor (Note: Motor
contactor is standard on Sizes 300 and 400; Optional on other sizes.)
B125-400 (BELT DRIVE): AH3-AN2-CH1-CL21
(BLOWER)-CL1 WD 274784
BLOWER MOTOR
CONTACTOR CONTACTS
FAN CONTROL
BK
BK
L1
(HOT)
BK
BK
R
24V
LINE VOLT
BR
R
Y
R
BLOWER MOTOR
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
STANDARD VOLTAGE ON B400 IS 230/1/60
T2 L2
CONTACTOR CONTACTS
BLOWER MOTOR
L1 T1
CONTACTOR COIL
BLOWER MOTOR
W Y
BR
BLOCKED VENT
MANUAL RESET
SWITCH
Y
BK W
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
BLOWER RELAY
4
CONTACTS
2
BK BK
BK BK
S/W SWITCH
OPTIONAL
COIL
BLOWER RELAY
PR PR
1 3
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
STANDARD DIAGRAM FOR B300 THRU 400
DIAGRAM FOR B125 THRU 250 WITH OPTIONAL
BLOWER MOTOR CONTACTOR
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)