MORTEX
PRODUCTS
INC
501
TERMINAL
RD
FORT
WORTH,
TX
76106
Page
16
Figure 12: Furnace Component Locations
Line Wiring Connections
1.
Remove the control box cover.
2.
Install the cable connector on the 5/8” (15.875 mm) dia
hole on the left side of the control box.
3.
Strip ½” (12.7 mm) of the insulation on the end of each
wire.
4.
Insert the wires through the hole in the casing and through
the cable connector.
5.
Use a wire nut to connect the black wire to the black pig tail
wire and tighten until the wires are securely fastened.
6.
Use a wire nut to connect the white wire to the white pigtail
wire and tighten until the wires are securely fastened.
7.
Use a green ground wire with a ring terminal. Insert a
green screw through the ring terminal and into the screw
hole and tighten the screw. Make the ground wire is
securely fastened to the control box. Connect the new
green wire with the bare supply wire and secure with a
wire nut, Ground screw hole location is in the small box
with the supply voltage wires.
8.
Reinstall the control box cover.
IMPORTANT -
All field installed wiring must be done in
accordance with the National Electrical Code ANSI/NFPA 70 –
latest edition or Canadian Electrical Code CSA C22.1 Part 1 or
all local codes. Unit must be electrically grounded according to
these codes.
The supply power wires from the main circuit breaker
panel to the furnace must be protected with a
circuit
breaker.
Thermostat Wiring
Thermostat wires are routed through side of furnace and connect
to the pig tail wires located above the control box. The
thermostat wires should also be no smaller than 22 gauges Refer
to Table 9 for recommended wire gauge and lengths.
Table 9: Low Voltage Wire Gauge and Max Lengths
Maximum
Wire Length
Thermostat
Wire Gauge
Thermostat Wire
Maximum Current
0 - 112 Feet
18
3.0 Amps
0 - 70 Feet
20
3.0 Amps
0 - 30 Feet
22
3.0 Amps
For personal safety be sure to turn the electrical power
“OFF” at the main entrance (Circuit Breaker Box) and at
the appliance before attempting any service or maintenance
operations. Home owners and / or furnace users should
never attempt to perform any maintenance which requires
opening the furnace control box door. Refer to Figure 13 for
the location of the ON/OFF switch.
Disconnect power supply before making wiring
connections to prevent electrical shock and equipment
damage.
If sheathed cable is used, refer to NEC National
Electrical Code (NFPA 70) or the Canadian Electrical
Code, Part 1 (CSA C22.1) and local codes for additional
requirements concerning supply circuit wiring.
This appliance must be field wired strictly in accordance
with the wiring diagram furnished with this appliance.
Any altered wiring or wiring not specified on the wiring
diagram could result in a hazard to persons and /or
property causing personnel injury, property damage or
death.
Any original factory wiring that requires replacement
must be replaced with wiring material having a
temperature rating of at least 35°C.
Ensure the supply voltage to the appliance is not greater
than 5% above or below the rated voltage shown on the
appliance rating plate.
