Pub No. 18-HD50D1-1A-EN
Part No. 37-7768003
December 2018
TCONT203AS42MA
Installation and User Guide
Trane XR203
Programmable Thermostat
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently
for the purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
