Section 13. Electrical - Low Voltage - Trane TAM4A0A18S11ED Installer's Manual

Section 13. Electrical - Low Voltage

13.1 Low Voltage Maximum Wire Length
Table 13.1 defines the maximum total length of low
voltage wiring from the outdoor unit, to the indoor
unit, and to the thermostat.
13.2 Low Voltage Hook-up Instructions
STEP 1 - Remove the Blower panel by removing the
four fasteners and then pulling away from the cabinet
to remove.
STEP 2 - For Low voltage entry, drill a .5" diameter
hole size in side of blower cabinet at location shown on
illustration. A 3/8" bushing is supplied in the doc pack.
STEP 3 - Route control wiring to unit and Insert Low
voltage wiring.
Note: After the LV wires have been inserted through
the new hole, the hole must be sealed.
Note: If a side return kit is used, the LV entry must be
on the opposite side of the air handler.
Note: When drilling access through cabinet do not
drill into any internal components. Remove internal
components before drilling through cabinet if possible.
Damage to the air handler or heater could result.
Note: Strain relief must be provided on the inside of
the air handler cabinet for the low voltage wiring. Field
supplied thermostat wires may be wire tied as a bundle
to the existing strain relieved low voltage pigtail leads
in the air handler unit.
STEP 4 - Remove the external sheathing of the wiring
approximately 5".
Table 13.1
24 VOLTS
WIRE SIZE MAX. WIRE LENGTH
18 AWG
16 AWG
14 AWG
Left Side OR
Drill 1/2"
diameter
hole
15-1/2" 15-1/2"
18"
150 Ft.
225 Ft.
300 Ft.
Right Side
Drill 1/2"
diameter
hole
18"
5"
27