System information

DCN: 141-01070-03 TR40 Thermostat Manual 24

Installation

Wall Display Unit Installation

WDU Location. Choose a location that best represents the temperature of the area to be controlled. Avoid

locations that are subject to drafts, from doors and windows, or areas with direct sunlight exposure.

WDU Mounting

Route the wires to the WDU through the access hole in the back of the case. Mount the WDU to the wall

with the screws and anchors provided. Be sure to plug any large access hole in the wall with sealer or

insulation to prevent wall drafts from affecting WDU operation.

WDU Prewiring

For new construction, the recommended wiring to the WDU from the Control Unit should be a two twisted pair

cable, 22 Ga minimum. Use of Category 5 wiring is preferred, but not required. In retrofit applications the

existing 18Ga thermostat wiring (a least 4 wires) is adequate and usually will work without problems.

However, such non-twisted wiring can be subject to interference due to adjacent in-wall high voltage wiring.

WDU To Control Unit Wiring

Wiring the WDU is simply connecting the four wire cable from the Control Unit to the WDU terminal block.

Two wires are for data and two are for power. WDU power is 12VDC and provided by the Control Unit.

CAUTION: DO NOT MISWIRE THE POWER AND DATA LINES…DAMAGE WILL RESULT!!!

CHECK YOUR WIRING BEFORE APPLYING POWER…

Remote Sensor Connection

Model TR40 has an remote sensor connector, J2, on the WDU base for connection of an external remote

temperature sensor. Follow the wiring diagram with the remote sensor to connect to the WDU.

1 GND

2 +12V

3 CLOCK

4 DATA

WIRING

ACCESS

HOLE

TR40 WDU WIRING DIAGRAM

TR40 WDU

BASE

Hook TOP here and rotate into

base. Be sure pins engage in

connector correctly.

TO CLOSE

OPENING AND CLOSING THE WDU CASE

TO OPEN

PULL FROM LOWER CORNERS

BASE

For Remote Sensor