WINCHESTER
BY
MORTEX
PRODUCTS
INC
FORT
WORTH,
TX
76106
Page
8
2.
Install the cable connectors on the 7/8” dia holes on the
right side of the control box.
3.
Strip ½” of the insulation on the end of each wire.
4.
Insert the wires through the holes in the casing and
through the cable connectors.
5.
Insert the black wire into the L1 screw terminal on the 1
st
circuit breaker from the top and tighten the set screw to
clamp down on the wire.
6.
Insert the white or red wire into the L2 screw terminal on
the 1
st
circuit breaker down from the top and tighten the
set screw to clamp down on the wire.
7.
If you are using a single circuit for a 15kW, 17kW, or
20kW model you will need to install a black jumper wire
from the L1 terminal on circuit breaker #1 to the L1
terminal on circuit breaker #2 and a white or red jumper
wire from the L2 terminal on circuit breaker #1 to the L2
terminal on circuit breaker #2. Refer to Figure 13 for
circuit breaker locations.
Note: The 100 amp 4 Pole Jumper Bar Assembly part
number 68BAE001 can be used in place of the jumper
wires.
8.
Insert the green wire into the ground lug and tighten the
set screw.
Dual Circuit Line Wiring Connections
9.
If you are using a dual circuit for a 15kW, 17kW, or
20kW model you will need to insert the black wire from
the second power supply into the L1 screw terminal on
the second circuit breaker down from the top and tighten
the set screw to clamp down on the wire.
10.
If you are using a dual circuit for a 15kW, 17kW, or
20kW model you will need to insert the white or red wire
from the second power supply into the L2 screw terminal
on the second circuit breaker down from the top and
tighten the set screw to clamp down on the wire.
11.
If you are using a dual circuit for a 15kW, 17kW, or
20kW model you will need to insert both green wires into
the ground lug and tighten the set screw.
12.
Tighten the screws on the cable connectors until the
power supply wires are securely fastened to the
connector.
NOTE:
The furnaces are equipped with either one or two
circuit breakers. These circuit breakers protect the wiring
inside of the furnace in the event of a short circuit.
Additionally, these breakers provide a means of disconnecting
the power to the unit. The circuit breakers in the furnace are
not meant to protect the branch circuit wiring between the
furnace and the home's breaker panel. General wire and
breaker sizes are shown in Table 7. If sheathed cable is used,
refer to NEC National Electrical Code (NFPA 70) or the
Canadian Electrical Code, Part I (CSA C22.1) and local codes
for additional requirements concerning supply circuit wiring.
Electrical data can be found in Tables 6, 7, and 8.
IMPORTANT -
All installation on field wiring must be rated
at 60ºC or higher. Please refer to the wiring diagrams on the
furnace or this book for more information.
The 15kW, 17kW and 20kW models may be connected to a
single or dual branch circuit.
IMPORTANT -
Refer to the NEC National Electrical Code
(NFPA 70) or the Canadian Electrical Code, Part I (CSA
C22.1) and local codes for wiring material requirements.
5
kW
8
kW
10
kW
12
kW
15
kW
17
kW
20
kW
Circuit
Load
‐
FLA
25.83
38.33
46.50
55.00
67.33
75.83
88.16
Minimum
Wire
Size
(90°C)
#10
#8
#8
#6
#4
#4
#3
Minimum
Wire
Size
(75°C)
#10
#8
#6
#6
#4
#3
#2
Minimum
Wire
Size
(60°C)
#10
#8
#6
#4
#3
#2
#1
Ground
Wire
Size
#10
#8
#8
#6
#4
#4
#3
Max
Fuse
Amps
35
50
60
60
80
90
100
ELECTRIC
HEATER
SIZES
Table 6: Wiring Requirements – Single Branch Circuit
Requires a circuit breaker jumper bar or a jumper wire.
+ Refer to the National Electrical Code Table 250-95 for Non-Sheathed Conductor Ground Wire.
