MORTEX
PRODUCTS
INC
FORT
WORTH,
TX
76106
Page
12
The 5 kW model has one 5 kW heater element.
The 8 kW model has one heater with two 4 kW elements.
The 10 kW model has one heater with two 5 kW elements
The 12 kW model has one heater two 6 kW elements.
The 15 kW model has one heater with two 5 kW elements (top
heater) and one heater with one 5 kW element (bottom
heater).
The 17 kW model has one heater with two 6 kW elements (top
heater) and one heater with one 5 kW element (bottom
heater).
The 20 kW model has one heater with two 5 kW elements (top
heater) and one heater with two 5 kW elements (bottom
heater).
If 240 VAC is not present at the heater element but there is
240 VAC present between the load terminal of the heater relay
and L2 then check the limit control for an open limit and
replace the open limit control.
If 240 VAC is not present at the heater element or between the
load terminal of the heater relay and L2 but is present between
the line terminal of the heater relay and L2; then, replace the
heater relay.
DP - Double Pole Contactor
Figure 13: Heater Contactor Terminal Designations
Blower Motor FLA
1/3 HP X-13 Motor – 2.0
1/2 HP X-13 Motor – 4.1
3/4 HP X-13 Motor – 6.0
Replacing the Blower
1.
Follow the instructions exactly as shown in Startup and
Shutdown Section in this manual to properly shutdown
this appliance.
2.
Remove furnace lower front door and switch furnace
circuit breaker(s) to “OFF”.
3.
Disconnect the plastic wire plug that has the wires that
goes to the motor terminals from the top right side of the
control box.
4.
Remove the two screws on the right side of the blower
mounting plate.
5.
Slide the blower out of the blower compartment and set
on the floor.
6.
Remove the wires from the terminals. Be sure to write
down the motor terminal identifier and wire color so the
wires do not get mistakenly placed on the wrong
terminals.
7.
Remove the blower housing from the mounting bracket
by removing the screws on the sides of the blower that
secure the blower to the bracket.
8.
Insert the new blower housing into the blower mounting
bracket and secure to the bracket with the screws.
9.
Connect the wires to the motor terminals so the wires are
connected to the same terminals on the new motor as they
were on the previous motor.
10.
Slide the blower assembly into the blower deck and insert
the two screws on the right side of the mounting bracket.
11.
Connect the pin plug to the pin plug on the top right side
of the control box.
12.
Switch the circuit breakers to ON and replace furnace
front door.
13.
Follow the instructions exactly as shown in Startup and
Shutdown Section in this manual to properly startup this
appliance.
14.
Set the thermostat to the desired temperature.
Figure 14: Blower Mounting Plate Screw Locations
To avoid personal injury take precautions not come into
contact with non-insulated electrical components.
Avoid wearing loose clothing or any items that can come in
contact with moving parts, such as the blower wheel. .This
can cause serious personal injury
