Reznor EEDU Unit Installation Manual - Manual (Page 19)

Form I-EEDU, P/N 150492 R6, Page 19
Line Voltage
Connection
Tabs
Connect Field
Wiring in the
Electrical Box
FIGURE 17 - Field
Wiring Connections
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 at least 105°C, except for sensor lead
wires which must be 150°C. See Hazard Levels, page 2.
Disconnect Switch
A disconnect switch is a required part of this installation. Switches are available, as
options or parts, or may be purchased locally. When ordered as an optional compo-
nent, the disconnect switch is shipped separately.
The disconnect switch may be fusible or non-fusible. When installing, be careful that
the conduit and switch housing are clear of furnace panels and inspection plates. Allow
at least four feet (1.2M) of service room between the switch and removable panels.
rise rating of 60°C. Conduit from the disconnect switch must be run so as not to inter-
fere with the service panels of the furnace.
If the heater has field-installed options that require electrical connections, consult the
instruction sheet and wiring diagram supplied in the option package.
WARNING
If you turn off the
power supply, turn off
the gas. See Hazard
Levels, page 2.
7.3 Typical Wiring
Diagrams
FIGURE 18A - Single-Stage with Intermittent Spark Pilot System with or without Lockout
EEDU AH2/AH3-AG1-CL1-CQ1 DWG# 110920 REV #6
PILOT
MAIN
1 3
12
CR 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
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° C.,
EXCEPT FOR ENERGY CUT-OFF OR SENSOR LEAD WIRE WHICH MUST BE 150° 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
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
W
SET ANT. AT 0.8 AMPS
R
THERMOSTAT
BL
BK OR R
(SEE NOTE #7
VENTER MOTOR
REDUNDANT
GAS V
AL
VE
AL
TERNA
TE
W
.R.
OR R
OBER
TSHA
W
BL
P
BK
BR
MAIN
PIL
O
T
M
C
PV
PIL
O
T
MV
PV-MV
MAIN
REDUNDANT
GAS V
AL
VE
HONE
Y
WELL
FACTORY WIRING
FIELD WIRING
FAN CONTROL
CONTACTS
TO BLOWER
CIRCUIT
OPTIONAL
LOAD LINE
WIRING CODE
BLACK - BK
BROWN - BR
RED - R
ORANGE - O
YELLOW - Y
GREEN - G
BLUE - BL
PURPLE - PR
WHITE - W
BL
BK
IGNITION
CONTROLLER PROBE
GRND
SPARK
FLAME SENSING
MV/PV
24V GND
MV
SENSE
TH
PV
G
BURNER
GND
BR
BR
BR
R
GND BURNER
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)
Specific wiring diagrams that include standard and factory-installed options are
included with the heater. See typical wiring diagrams in FIGURES 18A and 18B.