Modine Manufacturing VFV Installation And Service Manual page 6

INSTALLATION
WIRING
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.
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.
1. 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.
2. A wiring diagram is provided with each unit. Refer to this
diagram for all wiring connections.
3. 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.
4. Control wiring may consist of both 24V analog control
wiring and low current digital control signal wiring. To avoid
signal interference, the two types should be run in separate
conduits. If run in the same conduit, the digital signal wiring
should be shielded at one end of the wiring run. Wiring
should be twisted, stranded, and shielded communication
wire.
5. The wire gauge must be sized according to the National
Electric Code or CSA code based on amp draw and length
of run. Use only copper wire.
6. A knockout with strain relief is provided on the electrical box
for power wiring. Each unit is supplied with terminal strip for
power connection.
6
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 6.1).
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).
Figure 6.1 - Terminal Strip
14-500.5