Reznor EEDU Unit Installation Manual - Manual (Page 20)

Form I-EEDU, Page 20
LOW
1 3
12
CR
BR
BR
Y O
O
40 VA. CONTROL
BK
BL
24V
LINE VOLT
BR
R
TRANSFORMER
Y BK BK
LIMIT CONTROL
2 4
CONTACTS
VENTER RELAY
FOR WIRING)
W BK OR R BK BK
LINE/1/60
L2
(COM)
L1
(HOT)
O O
O
BL
PRESSURE
SWITCH
G
LINE GND
OPERATING SEQUENCE
- SET THERMOSTAT SWITCH AT "OFF" POSITION.
- TURN ON MAIN AND PILOT MANUAL GAS VALVES.
- TURN ON POWER TO UNIT.
- SET THERMOSTAT SWITCH AT "ON" POSITION.
- LOW STAGE OF THERMOSTAT CALLS FOR HEAT ENERGIZING THE VENTER MOTOR.
- PRESSURE SWITCH CLOSED 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 LOW STAGE GAS VALVE.
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
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).
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.
12
11
10
9
8
13
14
15
16
17
18
19
20
21
22
VENTER
RELAY COIL
9
TOTAL WIRE MINIMUM RECOMMENDED
LENGTH WIRE SIZE
150 FEET #18 GA.
250 FEET #16 GA.
350 FEET #14 GA.
FIELD CONTROL WIRING
- ON 75-250 208V UNITS, THE VENTER MOTOR WIRES ARE BLACK AND WHITE (CAP RED)
ARE BLACK AND WHITE.
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
- HIGH STAGE OF THERMOSTAT CALLS FOR HEAT ENERGIZING THE HIGH STAGE
GAS VALVE, FIRING UNIT AT FULL RATE.
R
BR
W1
W2
OPTIONAL
TWO
ST
AGE THERMOST
AT
R
R
HIGH
BL
BK OR R
(SEE NOTES
VENTER MOTOR
HIGH S
TG
HI
PV
PIL
O
T
STG LO
W
C
MV
REDUND
ANT
GAS V
AL
VE
HONE
YWELL T
WO
ST
AGE
PIL
O
T
AL
TERNA
TE
W
.R. T
WO
ST
AGE
REDUND
ANT
GAS V
AL
VE
R
BL
3
HIGH S
TG
4
BK
STG
2
LO
W
1
BR
PILOT
- FAN CONTROL KEEPS THE BLOWER CIRCUIT ENERGIZED WHILE THE UNIT IS HOT.
- BLOWER MOTOR ENERGIZED FROM HEAT EXCHANGER TEMPERATURE.
FAN CONTROL
CONTACTS
TO
BLOWER CIRCUIT
OPTIONAL
LOAD LINE
FACTORY WIRING
FIELD WIRING
BROWN - BR
RED - R
ORANGE - O
YELLOW - Y
GREEN - G
BLUE - BL
PURPLE - PR
WHITE - W
WIRING CODE
BLACK - BK
BL
BK
BR
C
IGNITION
CONTROLLER PROBE
GND
SPARK
FLAME SENSING
MV/PV
MV
SENSE
TH
PV
24V GND
BR
GND BURNER
G
BURNER
GROUND
- 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-AG2-CL22-CQ1 WD#110824 REV. #6
FIGURE 18B - Two Stage with Intermittent Spark Pilot System with or without Lockout
7.3 Typical Wiring Diagrams (cont'd)
7.0 Electrical Supply and Wiring (cont'd)
7.4 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.