Prepare For Installation - Trane TZEMT524AA21MA Installation Instructions And User Manual

INSTALLATION GUIDE
1

Prepare for Installation

Unpack your new 524 Control and locate the 524 Control, Base Plate, mounting screws, wall anchors and wire labels.
524 Control
2 Disconnect Power at the Breaker
Located your breaker box and remove or disconnect electrical power to your HVAC system. You may need to disconnect power at
both the indoor unit and the outdoor unit.
CAUTION: ELECTRICAL HAZARD
Failure to remove power can cause electrical shock and/or equipment damage.
3 Remove your existing thermostat cover
Carefully remove the cover of your existing thermostat leaving with wires connected. Consult instructions that came with the existing
thermostat as necessary. DO NOT remove the thermostat wires yet.
4 Determine if your system has a 24V common wire connected
1. If your system is a heat pump, skip to "6 Label and remove old thermostat wires" on page 3.
2. If your existing thermostat has a terminal named C, COM, X or B* with a wire connected to it, skip to "6 Label and remove old
thermostat wires" on page 3.
* The B terminal on Trane, American Standard, Weathertron and York thermostats is the 24V Common terminal. On all other
thermostats it servers another purpose.
5 Connecting a 24V common wire
1. Locate all unused (disconnected) wires from the thermostat wire bundle and write
down the colors. The 24V Common wire is typically (but not always) colored blue.
2. Go to your indoor HVAC unit and remove the cover(s) to access the 24 VAC
furnace wire terminals.
3. Find the wiring terminals at the furnace and then identify the 24 VAC common
terminal identified with the letter C, X, B, or COM.
This terminal may already have a wire connected to it but it may not be a wire
that goes to the thermostat.
4. Locate the thermostat wire bundle inside the furnace panel. This wire bundle is
routed from the thermostat, through the walls, and into the furnace panel. This
bundle can be identified at the furnace by checking the wire colors connected
and not connected and comparing to the wire bundle at the thermostat.
2
Base Plate
Mounting Screws
P516-001 Rev. 03/09-a
Wall Anchors Wire Labels
Unused wires
Wiring Terminals at Furnace
Thermostat
wire bundle
Thermostat
wire bundle
Unused
wires
18-HD46D1-1