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www.DaikinApplied.com 11
IM 970-2 • MAVERICK I ROOFTOP
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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.
NOTICE
This unit is approved for use with copper conductors only connected to unit
contactor. Warranty may be jeopardized if aluminum wire is connected to
unit contactor.
Special instructions apply for power wiring with aluminum conductors:
Warranty is void if connections are not made per instructions.
1.
All wiring should be made in accordance with the
National Electrical Code .
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 (refer to
Figure 12
and
Figure 13
) near the
rooftop, in accordance with the N.E.C., C.E.C. or local
codes. A bracket is provided with the unit for mounting
of the disconnect.
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
run can be determined from
Table 6
using the circuit
ampacity found on the unit rating plate. Use the smallest
wire size allowable from the unit disconnect to the unit.
4. For through the base wiring entry, all fittings and conduit
are field supplied for this application (
Figure 14 on page
12
). Reference
Table 8 on page 13
for proper hole
and conduit size.
Figure 12: Recommended Branch Circuit Disconnect
Location – Gas Heat Units
Figure 13: Recommended Branch Circuit Disconnect
Location – Electric Heat or Cooling Only Units
Table 6: Branch Circuit Copper Wire Size
(Based on 1% Voltage Drop)*
Supply
Wire
Length
(ft .)
Branch Circuit Ampacity
15
20
25
30
35
40
45
50
50
14
12
10
10
8
8
6
6
100
10
8
8
6
6
6
4
4
150
8
6
6
4
4
4
3
3
200
6
4
4
4
3
3
2
2
* Credit: National Electric Code
TO POWER
TO THERMOSTAT
BRANCH
CIRCUIT
DISCONNECT
TO POWER
BRANCH CIRCUIT DISCONNECT
TO CONTROL