Thermostat And Control Wiring; Typical Wiring Diagrams - Reznor EEDU Installation Operation & Maintenance

7.0 Electrical
Supply and
Wiring (cont'd)
7.4 Typical Wiring
Diagrams
FIGURE 17 - Single-Stage with Intermittent Spark Pilot System with or without Lockout
TO BLOWER
L1
CIRCUIT
(HOT)
8
OPTIONAL
FAN CONTROL
CONTACTS
9
LOAD LINE
LIMIT CONTROL
BK
10
BL
11
12
13
14
15
16
17
18
19 R
20 W
THERMOSTAT
21
SET ANT. AT 0.8 AMPS
NOTES
- DOTTED WIRING SUPPLIED AND INSTALLED BY OTHERS.
- CAUTION: IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE
MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING
A TEMPERATURE RATING OF A LEAST 105 DEGREES C., EXCEPT FOR ENERGY
CUT-OFF OR SENSOR LEAD WIRE WHICH MUST BE 150 DEGREES C.
- LIMIT WIRE TO BE #18 GA. 200 C. SF-1 OF SEW-1.
- USE #14 GA. WIRE FOR LINE WIRING TO UNIT.
- LINE AND BLOWER MOTOR BRANCH CIRCUIT WIRE SIZES SHOULD BE OF A SIZE
TO PREVENT VOLTAGE DROP BEYOND FIVE PERCENT OF SUPPLY LINE VOLTAGE.
- ON 208/230V. UNITS THE CONTROL TRANSFORMER HAS A DUAL VOLTAGE PRIMARY.
FOR 208V. UNITS USE BLACK AND RED LEADS (CAP YELLOW).
FOR 230V. UNITS USE BLACK AND YELLOW LEADS (CAP RED).
Form I-EEDU, Page 18

7.3 Thermostat and Control Wiring

A thermostat is not standard equipment but is an installation requirement. Use either
an optional thermostat available with the heater or a field-supplied thermostat. Install
according to the thermostat manufacturer's instructions.
A 24 volt thermostat must be used to actuate low voltage gas controls. If line voltage
from the thermostat to the unit is desired, consult the factory representative.
Labeled thermostat leads are provided in the heater junction box for connection of
thermostat wiring.
Thermostats should be located five feet (1.5M) above the floor on an inside wall, not
in the path of warm or cold air currents, not in corners where air may be pocketed.
Do NOT install thermostat on cold air walls. For specific connection details, refer to
instructions with the thermostat.
If more than one unit is cycled from one thermostat, separately activated relays must
be substituted at unit thermostat connections.
If using a low voltage thermostat with a heat anticipator, set the anticipator at full load
control amps.
CAUTION: If applicable, make sure the thermostat has an adequate
VA rating for the total requirements. Add coil rating of al relays
and match thermostat rating. See Hazard Levels, page 2.
Specific wiring diagrams that include standard and factory-installed options are included
with the heater. See typical wiring diagrams in FIGURES 17 and 18.
LINE/1/60
VENTER RELAY
CONTACTS
BK BK
2 4
BK BK LINE VOLT
BL
24V
O
WIRING CODE
BLACK - BK
BROWN - BR
RED - R
ORANGE - O
YELLOW - Y
GREEN - G
BLUE - BL
PURPLE - PR
WHITE - W
24V GND
MV/PV
G
GND BURNER
BURNER
MV
GND
IGNITION
CONTROLLER
SENSE
O PRESSURE
SPARK
SWITCH
O Y
TH
PV
L2
(COM)
VENTER MOTOR
(SEE NOTE #7
FOR WIRING)
BK OR R W
R
BK OR R
Y
40 VA. CONTROL
TRANSFORMER
BR
O
12 BR
VENTER
CR
3 1 RELAY COIL
9
FACTORY WIRING
FIELD WIRING
PV-MV
BR
BR
C
MAIN
BK
BK
M
MV
FLAME SENSING
PROBE
R
PILOT
BL
GRND
P
BL
PV
ON 115V. UNITS THE CONTROL TRANSFORMER IS SINGLE VOLTAGE PRIMARY.
USE BLACK AND YELLOW LEADS FOR 115V.
SECONDARY SIDE OF TRANSFORMER (24V.) USE BLUE AND BROWN LEADS.
- ON 75-250 208V UNITS, THE VENTER MOTOR WIRES ARE BLACK AND WHITE (CAP RED)
ON 75-250 230V UNITS, THE VENTER MOTOR WIRES ARE RED AND WHITE (CAP BLACK)
ON 75-250 115V UNITS AND 300-400 UNITS ALL VOLTAGES, THE VENTER MOTOR WIRES
ARE BLACK AND WHITE.
FIELD CONTROL WIRING
TOTAL WIRE MINIMUM RECOMMENDED
LENGTH WIRE SIZE
150 FEET #18 GA.
250 FEET #16 GA.
350 FEET #14 GA.
OPERATING SEQUENCE
- SET THERMOSTAT AT LOWEST SETTING.
- TURN ON MAIN AND PILOT MANUAL GAS VALVES.
- TURN ON POWER TO UNIT.
- SET THERMOSTAT AT DESIRED SETTING.
- ON A CALL FOR HEAT, THE VENTER MOTOR IS ENERGIZED.
- PRESSURE SWITCH CLOSES, ENERGIZING THE PILOT GAS
VALVE AND SPARK GAP TO PRODUCE A PILOT FLAME ON
EACH OPERATING CYCLE. THE SENSING PROBE PROVES THE
PRESENCE OF THE PILOT FLAME AND ENERGIZES THE SAFETY
SWITCH PORTION OF THE CONTROL. THE SWITCH ACTION
DE-ENERGIZES THE SPARK GAP AND ENERGIZES THE GAS VALVE,
FIRING UNIT AT FULL RATE.
- IF THE FLAME IS EXTINGUISHED DURING MAIN BURNER OPERATION,
THE SAFETY SWITCH CLOSES THE MAIN VALVE AND RECYCLES THE
SPARK GAP.
ON UNITS EQUIPPED WITH LOCKOUT CONTROL, IF 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)
EEDU AH2/AH3-AG1-CL1-CQ1 DWG# 110920 REV #6