5
AIR14-501.2
INSTALLATION
Figure 5.1 - Terminal Strip
Wiring
CAUTION
1. Ensure that the supply voltage to the appliance, as
indicated on the serial plate, is not 5% less than the rated
voltage.
2. Do not attempt to reuse any mechanical or electrical
component which has been wet. Such component must
be replaced.
WARNING
1. Disconnect power supply before making wiring
connections to prevent electrical shock and equipment
damage.
2. All appliances must be wired strictly in accordance with
the wiring diagram furnished with the appliance. Any
wiring different from the wiring diagram could result in a
hazard to persons and property.
3. Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature
rating of at least 105°C.
4. Ensure that the supply voltage to the appliance, as
indicated on the serial plate, is not 5% greater than rated
voltage.
Installation of wiring must conform with local building codes,
or in the absence of local codes, with the National Electric
Code ANSI/NFPA 70 - Latest Edition. Unit must be electrically
grounded in conformance to this code. In Canada, wiring must
comply with CSA C22.1, Part 1, Electrical Code.
Electric wiring must be sized to carry the full load amp draw of
the motor, starter and any controls that are used with the unit.
See Table 12.2 for Electrical Data.
Any damage to or failure of units caused by incorrect wiring of
the units is not covered by warranty.
Once the piping installation is complete, the electrical supply can
be connected to the terminal strip in the electrical box.
When installing any wiring into the control box, extra cable must
be left outside the panel to allow the panel to open fully. Failure
to follow these instructions may cause damage to the wiring
and/or the unit.
Terminal Strip Connections
The terminal strip connections are designed to clamp down on
the wires. To properly connect the wires to the terminal strip:
1. Push a small flat-head screwdriver into the square hole on the
terminal. Press firmly until the screwdriver hits the back stop
and opens the terminal (see Figure 5.1).
2. Remove approximately 3/8" of insulation from the end of
the wire and push the stripped wire into the oval hole in the
terminal.
3. Remove the screwdriver. Pull on the wire to make sure that it
is securely clamped in the terminal.
4. Make sure that the terminal clamp is in contact with bare wire
(insulation removed).
Piping Installation - Steam Coils
CAUTION
1. Steam coils are supplied from the factory with 1" NPT
connections
2. A steam trap should be provided with a trap of sufficient size
and capacity to pass a minimum of two times the normal
condensate released by the unit at the minimum differential
pressure in the system.
3. To ensure accurate readings of outdoor air temperature,
install the Outdoor Air Sensor outside, or in the fresh air
supply duct upstream from the unit - near outside air intake.
Piping Insulation
Chilled water and condensate pipes should be insulated right
up to the coil to prevent condensation which can damage
objects located below the piping. Chilled water valves must also
be insulated to prevent sweating. Hot water pipes should be
insulated to reduce heat loss and to prevent overheating of the
end compartment.
Do not operate the units within steam pressure greater than
10 psig. Steam pressure must be 10 psig or lower to avoid
excessive discharge air temperatures that could cause
burns or personal injury.