Reznor B Unit Installation Manual - Manual (Page 27)

Form I-F/B, P/N 98126 R21, Page 27
FIGURE 31 - Blower-type, Gravity-Vented, Model B Sizes 25-100 with Intermittent Spark Pilot, Single
Stage Heating, Natural or Propane, Direct Drive
B25-100 (DIRECT DRIVE):
AH3-CH1-CL21(BLOWER)-CL1 WD 274782
BLOWER RELAY
4
CONTACTS
2
FAN CONTROL
BK
BL/BK BK BK
L1
(HOT)
BK
W
BR
GROUND TERMINAL
(TERMINAL STRIP)
L2
(COM)
115/1/60
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
G
GRD
CAPACITOR
BL (MEDIUM)
BK (HIGH)
R (LOW)
W
GR
GRD
BLOWER MOTOR
THREE SPEED
BR BR
CONTROL
BK
R
24V
115 VOLT
BR
TRANSFORMER
Y
BK BK
S/W SWITCH
OPTIONAL
R
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
SWITCH
MANUAL RESET
BLOCKED VENT
COIL
BLOWER RELAY
3 1
PR PR
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
OPERATING SEQUENCE
- SET THERMOSTAT AT LOWEST SETTING.
- TURN ON MAIN AND PILOT MANUAL GAS VALVES.
- TURN ON POWER TO UNIT.
- THERMOSTAT CALLS FOR HEAT FIRING UNIT AT FULL RATE AFTER PILOT
- SET THERMOSTAT AT DESIRED SETTING.
PROVING SEQUENCE.
- FAN CONTROL SENSES HEAT EXCHANGER TEMPERATURE, ENERGIZING THE
BLOWER MOTOR.
- 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)
- SET THERMOSTAT AT LOWEST SETTING FOR SHUTDOWN.
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.
- B 50 USE BLACK MOTOR LEAD, CAP BLUE AND RED, OR USE BLUE MOTOR LEAD, CAP
- THREE SPEED MOTOR CONNECTIONS ARE AS FOLLOWS:
BLACK AND RED
CAP BLACK AND RED, OR USE RED MOTOR LEAD, CAP BLACK AND BLUE
- B 100-75 USE BLACK MOTOR LEAD, CAP BLUE AND RED, OR USE BLUE MOTOR LEAD,
- B 25 USE BLUE MOTOR LEAD, CAP BLACK AND RED, OR USE BLUE MOTOR LEAD, CAP
BLACK AND 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.
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