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16
Units Without Disconnect Option
Units With Disconnect Option
2
4
6
1
3
5
L1
L2
L3
Optional
Disconnect
Switch
Disconnect factory test leads; discard.
Factory
Wiring
11
13
L1
L2
L3
C1
TB1
Disconnect
C10074
Fig. 11 -- Power Wiring Connections
Table 8 – American/European Wire Conversions
AMERICAN
EUROPEAN
Industry
Standard Size
American Conversion
Size (mm
2
)
Industry Standard
Size (mm
2
)
20 AWG
0.52
0.5
18 AWG
0.82
1.0
16 AWG
1.30
1.5
14 AWG
2.08
2.5
12 AWG
3.30
4.0
10 AWG
5.25
6.0
8 AWG
6.36
10.0
6 AWG
13.29
16.0
4 AWG
21.14
25.0
3 AWG
26.65
—
2 AWG
33.61
35.0
1 AWG
42.39
50.0
1/0 AWG
53.49
—
2/0 AWG
67.42
70.0
3/0 AWG
85.00
95.0
4/0 AWG
107.9
120.0
Affix the crankcase heater warning sticker to the unit
disconnect switch.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. See
Table 9. On 3-phase units, voltages between phases must
be balanced within 2% and the current within 10%. Use
the formula shown in the legend for Table 9, Note 3 (see
page 18) to determine the percent of voltage imbalance.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to
electrical components. Such operation would invalidate
any applicable Carrier warranty.
Field Control Wiring —
38AUD unit control voltage is 24 v. See Fig. 19 and Fig.
20 for typical field control connections and the unit’s label
diagram for field-supplied wiring details. Route control
wires to the 38AUD unit through the opening in unit’s end
panel to the connections terminal board in the unit’s
control box.
Remainder of the system controls connection will vary
according to the specific construction details of the indoor
section (air handler or packaged fan coil). Fig. 12 depicts
typical connections to a Carrier 40RU fan coil unit. Plan
for field connections carefully and install control wiring
correctly per the project plan. Additional components and
supplemental transformer accessory may be required.
The 38AUD unit requires an external temperature control
device. This device can be a thermostat (field-supplied) or
a PremierLink controller (available as a field-installed
accessory, for use on a Carrier Comfort Network or as a
stand alone control).
Note 1: Typical multi-function marking. Follow manufacturer’s configuration
instructions to select Y2.
Note 2: Connect only if thermostat requires 24-vac power source.
Note 3: Connect W1 and W2 if supplemental heaters are installed
Field Wiring
(Note 1)
(Note 2)
(Note 3)
(Note 3)
C10078
Fig. 12 -- Typical Remote Thermostat Connections
38A
U
D
Summary of Contents for 38AUD 16 Series
Page 21: ...21 CIRCUIT 1 CIRCUIT 2 C10946 Fig 16 38AUD 16 Charging Chart Novation 38AUD...
Page 22: ...22 C10949 Fig 17 38AUD 16 Charging Chart RTPF 38AUD...
Page 23: ...23 CIRCUIT 1 CIRCUIT 2 C10950 Fig 18 38AUD 25 Charging Chart RTPF 38AUD...
Page 24: ...24 C10084A Fig 19 Typical 38AUD 16 Wiring Diagram 38AUD...
Page 25: ...25 C10085A Fig 20 Typical 38AUD 25 Wiring Diagram 38AUD...