AAON M2-036 - Manual (Page 50)

50
A single point connection to a terminal
block is provided. Split units may require
connection between the units. High voltage
conductors should enter the control panel in
a separate opening and separate conduit than
24V low voltage conductors.
Note: Locations for field cut electrical
entries are marked on the unit. Field cut
openings must be a minimum of 6 inches
away from all components and wiring to
prevent damage due to drilling or cutting.
To pass wires through the wall or roof of the
unit, a hole should be cut and conduit passed
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.
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. Insulation covers should be
fabricated from sheet metal to cover the
foam at the cut. The edges and corners that
are not covered should be sealed using
silicone caulking. If a reciprocating saw is
used to make the cut out, take care that the
metal skins of the foamed part do not
separate from the foam, this would result in
reduced structural integrity of the part.
Size supply conductors based on the unit
Minimum Current Ampacity (MCA) rating.
Supply conductors must be rated a minimum
of 75°C.
Protect the branch circuit in accordance with
code requirements. The unit must be
electrically grounded in accordance with
local codes, or in the absence of local codes,
the current National Electric Code,
ANSI/NFPA 70 or the current Canadian
Electrical Code CSA C22.1.
Wire power leads to the unit’s terminal
block or main disconnect. All wiring beyond
this point has completed at the factory.
Supply voltage must be within the min/max
range shown on the unit nameplate.
Available short circuit current should not
exceed the SCCR rating shown on the unit
nameplate.
Three phase voltage imbalance will cause
motor overheating and premature failure.
The maximum allowable imbalance is 2.0%.
Voltage imbalance is defined as 100 times
the sum of the deviation of the three
Three phase voltage imbalance will
cause motor overheating and
premature failure.
CAUTION
The foam insulation releases
dangerous fumes when it is burnt. Do
not cut a foam part with a cutting
torch or plasma cutter. Do not weld to
a foam filled part.
WARNING