507789-01
Issue 2007
Page 12 of 24
Electrical Connections
Electric shock hazard! - Disconnect all power
supplies before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical
shock.
WARNING
Run 24V Class II wiring only through specified low
voltage opening. Run line voltage wiring only through
specified high voltage opening. Do not combine voltage
in one opening.
WARNING
Electric Shock Hazard.
Can cause injury or death.
Foil-faced insulation has conductive
characteristics similar to metal. Be sure there
are no electrical connections within 1/2ʺ of the
insulation. If the foil-faced insulation comes in
contact with electrical voltage, the foil could
provide a path for current to pass through
to the outer metal cabinet. While the current
produced may not be enough to trip existing
electrical safety devices (e.g., fuses or circuit
breakers), the current can be enough to cause
an electrical shock hazard that could cause
personal injury or death.
WARNING
Electric Shock Hazard. Can cause injury or
death. Unit must be properly grounded in
accordance with national and local codes.
Line voltage is present at all components when
unit is not in operation on units with single-
pole contactors. Disconnect all remote electric
power supplies before opening access panel.
Unit may have multiple power supplies.
WARNING
• Wiring must conform to the current National Electric
Code ANSI/NFPA No. 70, or Canadian Electric Code
Part I, CSA Standard C22.1, and local building codes.
Refer to following wiring diagrams. See unit nameplate
for minimum circuit ampacity and maximum over-
current protection size.
•
Electrical wiring, disconnect means and over-current
protection are to be supplied by the installer. Refer
to the air handler rating plate for maximum over-
current protection, minimum circuit ampacity, as well
as operating voltage. Select the proper supply circuit
conductors in accordance with tables 310-16 and 310-
17 in the National Electric Code, ANSI/NFPA No. 70 or
tables 1 through 4 in the Canadian Electric Code, Part
I, CSA Standard C22.1.
•
The power supply must be sized and protected
according to the specifications supplied on the product.
•
This air handler is factory-configured for 240 volt,
single phase, 60 cycles. For 208-volt applications, see
“208 Volt Conversion” later in this section.
•
Separate openings have been provided for 24V low
voltage and line voltage. Refer to the dimension
illustration of specific location.
•
This unit is provided with holes for conduit. Use
provided caps to seal holes not used.
•
Typical unit wiring (as well as wiring of optional field-
installed electric heat) is given in Figure 14. Refer to
the instructions provided with the electric heat section
for proper installation.
USE COPPER CONDUCTORS ONLY
WARNING
Figure 11. Electrical Connections
(Upflow Configuration)
End Panel
Side
