Electrical Installation
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IM 971-3 • MAVERICK I
Electrical Installation
Electrical Installation Wiring
Power Supply
DANGER
Power supply to the unit must be disconnected before making field
connections. To avoid electrical shock, personal injury or death, be sure to
rigorously adhere to field wiring procedures regarding proper lockout and
tagout of components.
1.
All wiring should be made in accordance with
the
Consult the local power
company to determine the availability of sufficient power
to operate the unit. Check the voltage at power supply to
make sure it corresponds to the unit’s RATED VOLTAGE
REQUIREMENT. Install a branch circuit disconnect near
the rooftop, in accordance with the N.E.C., C.E.C. or
local codes.
2. It is important that proper electrical power is available at
the unit. Voltage should not vary more than 10% from
that stamped on the unit nameplate. On three phase
units, phases must be balanced within 3%.
3. For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of
using the circuit
ampacity found on the unit rating plate.
4. For through the base wiring entry reference
. All
fittings and conduit are field supplied for this application.
proper hole and conduit size.
5. For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of
run can be determined from this table using the circuit
ampacity found on the unit rating plate. From the unit
disconnect to unit, the smallest wire size allowable in
may be used, as the disconnect must be in sight
of the unit.
6. Wire size based on 75°C rated wire insulation for 1%
voltage drop.
7. For more than 3 conductors in a raceway or cable, see
the N.E.C. (C.E.C. in Canada) for derating the ampacity
of each conductor.
IMPORTANT:
This unit is approved for use with copper
conductors only connected to unit contactor. Warranty will be
voided if aluminum wire is connected to unit contactor.
Figure 12: Recommended Branch Circuit Disconnect
Location
Table 9:
Minimum Wire Sizes
Unit
MCA
Supply Wire Length in Feet
50
100
150
200
250
300
20
10
8
6
4
4
4
25
10
8
6
4
4
3
30
8
6
4
4
3
2
35
8
6
4
3
2
1
40
8
6
4
3
2
1
45
8
4
3
2
1
1/0
50
6
4
3
2
1
1/0
60
6
4
2
1
1/0
2/0
70
4
3
2
1/0
2/0
3/0
80
4
3
1
1/0
2/0
3/0
90
3
2
1/0
2/0
3/0
4/0
100
3
2
1/0
2/0
3/0
4/0
110
2
1
2/0
3/0
4/0
250
125
1
1
2/0
3/0
4/0
25
Disconnect
Содержание Maverick I MPSA07D
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