AAON H3 Series, Установка, эксплуатация и обслуживание

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On units with internal control panel,
electrical supply can enter through the supply
air side (front) of the H3 unit.
Figure 16 - H3 internal control panel
electrical connections
A single point connection to a terminal block
is provided. High voltage conductors must
enter the control panel in a separate opening
and separate conduit than low voltage
conductors.
Field wired disconnecting means of power,
external to the unit, must be incorporated in
the fixed wiring in accordance with the
wiring rules and provide full disconnection of
all poles under overvoltage Category III
conditions.
To pass wires through the wall or roof of the
unit, cut a hole and pass the conduit through
it. Use the following procedure to cut a round
hole in a foam panel.
Cutting Electrical Openings
1. Locate the placement of the hole. Be
sure that the conduit will not interfere
with the operation of any component or
prevent access of any door or removable
panel. Field cut openings must be a
minimum
of 15.24 centimeters
(6 inches) away from all components
and wiring to prevent damage due to
drilling or cutting.
2. Drill a pilot hole all the way through the
foam panel.
3. Using a hole saw, cut the hole through
the metal on both sides of the foam part.
4. With a knife cut the foam out of the hole.
5. After the conduit is installed in the hole
caulk the entire perimeter of the hole on
both sides with an industrial grade
silicone sealant or a duct seal compound.
If a larger cut-out is needed for additional
duct connections not provided by the factory,
or for any other reason, it is very important
that the foam be completely sealed. Fabricate
insulation covers from sheet metal to cover
the foam at the cut. Seal the edges and corners
that are not covered using silicone caulking
or a duct seal compound.
If a reciprocating saw is used to make the cut-
out, take care that the metal skins of the foam
part do not separate from the foam, this
would result in reduced structural integrity of
the part.
Proper sealing of the electrical entries
into the unit must be verified. Failure
to seal the entries may result in
damage to the unit and property.
Electric
shock hazard. Before
attempting to perform any installation,
service, or maintenance, shut off all
electrical power to the unit at the
disconnect switches. Unit may have
multiple power supplies. Failure to
disconnect power could result in
dangerous operation, serious injury,
death, or property damage.
WARNING
CAUTION