Reznor VR Unit Installation Manual - Manual (Page 33)

Form I-VR, P/N 205202 R13, Page 32
7.2 Control
Thermostat
FIGURE 31 - Wiring Diagram
7. Electrical and
Wiring (cont’d)
directly from the main electrical panel to the heater. All external wiring must be
within approved flexible conduit and have a minimum temperature rise rating
of 60°C. Conduit must not be run directly under the infrared tubes and should
not interfere with the heater access panel. Allow slack in the flexible conduit to
allow for heater expansion and contraction.
If the heater has field-installed options that require electrical connections, con-
sult the instruction sheet and wiring diagram supplied in the option package.
7.1 Wiring Diagram
The heater is designed for automatic control from a remotely positioned or
optional unit-mounted 24-volt thermostat and is equipped with a terminal strip
to facilitate thermostat connections. See FIGURE 32.
Use either an optional thermostat (Option CL1) or a field-supplied 24-volt ther-
mostat. Do not attempt to operate with a line voltage thermostat. Locate a
remote thermostat on an inside wall in the heated area but not in the direct path
Refer to the wiring diagram in FIGURE 31 or the diagram on the burner control
box door.
WD# 204374 VR SERIES REV. #3
BLOWER MOTOR
PRESSURE SWITCH
SPARK GAP
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 GAUGE
Y Y
DSI CONTROL
1 FLASH
2 FLASH
3 FLASH
STEADY OFF
LED FLASH CODES
COMBUSTION PRESSURE SWITCH OPEN WITH BLOWER ON
COMBUSTION PRESSURE SWITCH CLOSED WITH BLOWER OFF
LOCKOUT FROM THREE IGNITION TRIALS
NO CONTROL POWER
LED
BK BK
GAS VALVE
BR BL
24V
LINE V
BK
Y
R BR
L1/IND COM X
TRANSFORMER
W
WIRE CONNECTOR
FIELD WIRING
OPTIONAL FACTORY
FACTORY WIRING
WIRING
BK
W1
R
TERMINAL STRIP
POWER APPLIED, CONTROL OKAY STEADY ON
G
GRD
SCREW
115-208-230/1/60
220-240/1/50
CAPACITOR
(SEE NOTE #6)
BR BR
SPARK
TRANSFORMER
WIRING CODE
BLACK - BK
BROWN - BR
RED - R
ORANGE - O
YELLOW - Y
GREEN - G
BLUE - BL
PURPLE - PR
WHITE - W
Y
W1
R
SET ANT
. A
T 0.6 AMPS.
R
W
.R.
1C30-341 THERMOST
AT
O
Y
W
R
PS1
PS2
MV
IND
BK
SYSTEM
BK
W
BK
C
BR BR
G
G
LOCKOUT FROM FIVE PRESSURE SWITCH LOSSES
CONTROL HARDWARE FAULT DETECTED
LOCKOUT FROM FIVE FLAME LOSSES
6 FLASH
5 FLASH
4 FLASH
G
COMBUSTION
G
BR
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 BLOWER MOTOR.
6. COMBUSTION PRESSURE SWITCH CLOSES, FIRING UNIT AT FULL
7. WHEN BURNER FLAME IS SENSED, UNIT CONTINUES FIRING AT FULL RATE.
8. IF THE FLAME IS EXTINGUISHED FIVE TIMES DURING A CALL FOR HEAT,
THE INTEGRATED CONTROL SYSTEM CLOSES THE GAS VALVE AND
MUST BE RESET BY SETTING THE THERMOSTAT AT LOWEST SETTING FOR
(SEE LIGHTING INSTRUCTIONS).
RATE DURING THE IGNITION TRIAL PERIOD.
5 SECONDS, OR INTERRUPTING LINE VOLTAGE FOR 0.25 SECONDS.
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, WHICH MUST BE 150° C.
4. USE 18 GA. WIRE FOR ALL WIRING ON THE UNIT.
5. LINE BRANCH WIRE SIZES SHOULD BE OF A SIZE TO PREVENT
VOLTAGE DROPS BEYOND 5% OF SUPPLY LINE VOLTAGE.
6. CAPACITOR IS NOT USED ON 115V MODELS 50-100.
ON 115V. UNITS THE SYSTEM TRANSFORMER IS A SINGLE VOLTAGE PRIMARY.
7. ON 208/230V. UNITS THE SYSTEM TRANSFORMER HAS A DUAL VOLTAGE PRIMARY.
FOR 230V. UNITS, CAP THE 208V TERMINAL.
FOR 208V. UNITS, CAP THE 230V TERMINAL.
8. FOR UNVENTED INSTALLATIONS WHEN MECHANICAL MEANS IS PROVIDED TO
SUPPLY AND EXHAUST, A POSITIVE INTERLOCK MUST BE PROVIDED BY THE
INSTALLER SO THAT THE HEATER CANNOT OPERATE UNLESS THE SUPPLY AND
EXHAUST SYSTEM IS OPERATING.
INTERLOCK SWITCH
(SEE NOTE 8)
CUSTOMER'S