Carrier 38AUD Installation, Start-Up And Service Instructions Manual page 19

Units Without Disconnect Option
C1
11
Disconnect
L1
Units With Disconnect Option
L1
2
Optional
Disconnect
L2 4
Switch
L3
6
Disconnect factory test leads; discard.
Fig. 11 - - Power Wiring Connections
Table 10 – American/European Wire Conversions
AMERICAN
Industry American Conversion
Standard Size Size (mm
20 AWG 0.52
18 AWG 0.82
16 AWG 1.30
14 AWG 2.08
12 AWG 3.30
10 AWG 5.25
8 AWG 6.36
6 AWG 13.29
4 AWG 21.14
3 AWG 26.65
2 AWG 33.61
1 AWG 42.39
1/0 AWG 53.49
2/0 AWG 67.42
3/0 AWG 85.00
4/0 AWG 107.9
Field Control Wiring —
38AU unit control voltage is 24 v. See Fig. 24 (38AUZ)
and Fig. 25 (38AUD) for typical field control connections
and the unit's label diagram for field-supplied wiring
details. Route control wires to the 38AU 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 (38AUZ)
and Fig. 13 (38AUD) depict 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.
TB1
13
L2 L3
1
Factory
3
Wiring
5
C10074
EUROPEAN
Industry Standard
2 2
) Size (mm )
0.5
1.0
1.5
2.5
4.0
6.0
10.0
16.0
25.0
—
35.0
50.0
—
70.0
95.0
120.0
The 38AU 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 2)
(Note 2)
(Note 1)
Note 1: Connect only if thermostat requires 24-vac power source.
Note 2: Connect W1 and W2 if supplemental heaters are installed
Field Wiring
Fig. 12 - - Typical Remote Thermostat Connections
— 38AUZ
(Note 1)
(Note 3)
(Note 3)
(Note 2)
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
Fig. 13 - - Typical Remote Thermostat Connections
— 38AUD
19
C10985
C10078