Trane E4AH5E24A1J30A Installation Manual page 14

4.2 Control Wiring
Class 2 low voltage control wiring should not be run in conduit with main power wiring and must be
separated from power wiring, unless class 1 wire of proper voltage rating is used.
 Low voltage control wiring should be color-coded 18 AWG. For lengths longer than 100 ft, 16 AWG
wire shall be used.
 Refer to wiring diagrams attached to indoor and outdoor sections to be connected.
 Make sure separation of control wiring and power wiring has been maintained.
Air
Handler
Air
Handler
Two-Stage Thermostat
Two-Stage thermostat
a)
One-Stage Thermostat
Single-Stage thermostat
b)
Figure 4-2 Schematic diagram for control wiring connection
14
Heat Pump
Outdoor Unit
Heat Pump
Outdoor Unit