5
To prevent improper and dangerous
operation due to wiring errors, label all
wires prior to disconnection when
servicing controls. Verify proper
operation after servicing.
The best protection for the wiring is the lowest rated fuse
or circuit breaker which will supply power to the unit during
normal operation without nuisance trips. Such a device
will provide maximum circuit protection. DO NOT EX-
CEED THE MAXIMUM OVERCURRENT DEVICE SIZE
SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weath-
erproof fittings. All exterior power supply and ground
wiring must be in approved weatherproof conduit. Low
voltage wiring from the unit control panel to the thermostat
requires coded cable.
Flexible Set-Up For Wiring On The Left Or Right
Side
Line voltage and low voltage wiring can enter the unit
either by:
• Line voltage, electrical heater wiring, and low voltage
on the right side or
• Line voltage and low voltage wiring on the left side
with electrical heater wiring on the right side or
• Line voltage and electrical heater wiring on the right
side with low voltage wiring on the left side or
• Low voltage wiring on the left side and line voltage
and electric heater wiring on the right side.
For knockout locations, see dimension drawing on the
Specification Sheet . Use the Single Point wiring kit to add
further flexibility to the installation wiring.
Unit Voltage
The unit transformer is factory connected for 230V opera-
tion. If the unit is to operate on 208V, reconnect the
transformer primary lead as shown on the unit wiring
diagram.
Vl. Circulating Air and Filters
Airflow Conversion
Units can easily be converted from horizontal to vertical
airflow delivery.
Units are shipped from the factory ready for horizontal
airflow. If conversion to vertical airflow is necessary,
proceed as follows:
1. Cut insulation around bottom openings and remove
panels from the bottom of the unit, saving the screws
holding the panels in place.
2. From the rear of the unit, remove the four screws
securing the blower assembly in place and loosen the
two screws directly below the duct opening (Figure 4).
Remove
Loosen
Figure 4
Duct Removal
3. Remove the clamp securing the blower assembly to
the bottom of the unit. The clamp and screws may be
discarded (Figure 5).
Airflow
Remove
Figure 5
Clamp Removal
4. Rotate the blower assembly 90° clockwise, setting
the blower assembly outlet on the bottom of the unit
and secure with two screws removed in step 2 (Figure
6) .
5. Tighten the two screws below the duct opening that
were loosened in step 2.
Figure 6
Vertical Blower Assembly
CAUTION
Airflow
Install
Screws
Removed
From
Back
Panel