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® U.S. Registered Trademark
Copyright © American Standard Inc. 1999

INSTALLER'S GUIDE

XT302C Deluxe Programmable

Heat-Cool Thermostat

18-HD25D7-5

APPLICATION

The XT302C Deluxe Programmable Heat-Cool Thermostat provides electrnic control of 24 Vac single-zone multistage systems.
Refer to Table 1 for a general description of the thermostat. This thermostat requires a common wire to supply power.

Table 1. Description of XT302C.

RECYCLING NOTICE

If this thermostat is replacing a thermostat that
contains mercury in a sealed tube, do not place your
old thermostat in the trash.

Contact your local waste management authority for
instructions regarding recycling and the proper
disposal of the old thermostat.

INSTALLATION

When Installing this Thermostat...

1. Read these instructions carefully. Failure to follow the

instructions can damage the product or cause a
hazardous condition.

2. Check the ratings given in the instructions and on the

product to make sure the product is suitable for your
application.

3. Installer must be a trained, experienced service

technician.

4. After completing installation, use these instructions

to check out the product operation.

Location

Install the thermostat about 5 ft (1.5m) above the floor in an
area with good air circulation at average temperature. See
Fig. 1. Avoid installing the thermostat where it can be affected
by the following:

Drafts, or dead spots behind doors and in corners.

Hot or cold air from ducts.

Radiant heat from sun or appliances.

Concealed pipes and chimneys.

Unheated (uncooled) areas such as an outside wall
behind the thermostat.

Wallplate Installation

Position wallplate horizontally on the wall or on a 2 in. x 4 in.
wiring box.

1. Position and level the wallplate for appearance only (the

thermostat will function properly even when
not level).

Fig. 1. Typical location of thermostat.

5 FEET

[1.5 METERS]

YES

NO

NO

NO

M17106

69-1213-1

Model

System

Changeover

System Selection

Fan Selection

Comments

XT302C

Multistage

Automatic

Heat-Off-Cool-Auto

On-Auto

System and fan selections are done by
keyboard.

Summary of Contents for XT302C

Page 1: ...and on the product to make sure the product is suitable for your application 3 Installer must be a trained experienced service technician 4 After completing installation use these instructions to che...

Page 2: ...es See Fig 4 NOTE Use 18 gauge color coded thermostat cable for proper wiring 2 Securely tighten each terminal screw 3 Push excess wire back into the hole 4 Plug the hole with nonflammable insulation...

Page 3: ...y Time Wake Leave Return Sleep Day Heat Cool Settings Daylight Time Copy M12957 Fan Auto Fan On Time Set Program System Filter Fan Run Program Hold Temp Set Current Day Time Wake Leave Return Sleep Da...

Page 4: ...ring to this chart Installer Setup Procedure 1 Press and hold the Information Increase and Decrease keys at the same time until all display segments and the first setup number displays all display seg...

Page 5: ...ed Press Time or Press Increase or Decrease to change setting Installer Factory Setting Other Choices Actual Select Setup Number Display Description Display Description Setting Programming 42 Press Ti...

Page 6: ...call ends 2 Fan operation extends 60 seconds after the call ends 3 Fan operation extends 90 seconds after the call ends Extended fan operation in cooling 20 0 No extended fan operation after the call...

Page 7: ...ring call for cool Temperature range stops in heating 34 85 Highest setpoint heating can be set to 55 to 85 Temperature range 1 F increments heating setpoint can be set to Temperature range stops in c...

Page 8: ...ments of the LCD To start the self test Press and hold the Increase and Decrease keys at the same time until all display segments and the number 10 appears all displays segments appear for approximate...

Page 9: ...Enter Comfort R self test Temp 51 Reads HH terminals If the terminals are open and Comfort R is enabled display reads humidity If the terminals are closed no humidity displays Keyboard Operation Self...

Page 10: ...l not come on Thermostat is not being powered Check for 24 Vac between R and W terminals Check if the circuit breaker is tripped reset the circuit breaker Check if the system fuse is blown replace the...

Page 11: ...eed with troubleshooting Thermostat minimum off time is activated Wait up to five minutes for the system to respond Enter Installer Setup number 39 Reconfigure minimum off time if required System sele...

Page 12: ...12 XT302C DELUXE PROGRAMMABLE HEAT COOL THERMOSTAT 69 1213 1 T8624 Pub No 18 HD25D7 5 69 1213 1 T C Rev 1 99 American Standard Inc Troup Highway Tyler TX 75711 9010 Printed in Taiwan R O C...

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