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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.
Table 13.1
24 VOLTS
WIRE SIZE
MAX. WIRE LENGTH
18 AWG
150 Ft.
16 AWG
225 Ft.
14 AWG
300 Ft.
13.2 Low Voltage Hook-up Instructions
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”.
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.
5”
15-1/2”
Drill 1/2”
diameter
hole
Drill 1/2”
diameter
hole
18”
15-1/2”
18”
Front
Right Side
Left Side
OR
STEP 1
- Remove the Blower panel by removing the
four fasteners and then pulling away from the cabinet
to remove.
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.
