Lennox CBX25UH Series, Руководство по установке

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Page 9
CBX25UH SERIES
Electrical Connections
WARNING
Electric shock hazard! - Disconnect all
power supplies before servicing.
Replace all parts and panels before op­
erating.
Failure to do so can result in death or elec­
trical shock.
WARNING
Electric Shock Hazard.
Can cause injury or death.
Foil‐faced insulation has conductive characteristics sim­
ilar to metal. Be sure there are no electrical connections
within a ½” 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 electric shock hazard that could cause person­
al injury or death.
S
All field wiring must be done in accordance with
National Electrical Code, applicable requirements of
UL and local codes, where applicable.
S
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.
S
The power supply must be sized and protected
according to the specifications supplied on the
product.
S
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.
S
For optional field‐installed electric heat applications,
refer to the instructions provided with the accessory
for proper installation.
WARNING
USE COPPER CONDUCTORS ONLY
1. Disconnect all power supplies.
2. Remove the air handler access panel.
3. Route the field supply wires to the air handler electrical
connection box.
4. Use UL-listed wire nuts to connect the field supply
conductors to the unit black and yellow leads, and the
ground wire to ground terminal marked
GND .
5. Replace the air handler access panel.
CONNECT BLACK AND
YELLOW WIRES TO
FIELD-PROVIDED
CONDUCTORS.
CONNECT GROUND
WIRE TO GROUND
TERMINAL MARKED
“GND”
Figure 11. Making Electrical Connections
208 VOLT CONVERSION
1. Disconnect all power supplies.
2. Remove the air handler access panel.
3. Using the wiring diagram located on the unit access
panel as a reference, move the 2 connected black
transformer leads from the 240 volt terminal on the
transformer to the 208 volt terminal on the transformer.
WARNING
Electrically ground air handler. Connect
ground wire to ground terminal marked
“GND”.
Failure to do so can result in death or elec­
trical shock.