Danfoss WT-D,WT-P Room Thermostats Installation Guide

Installation Steps

User Guide can be downloaded from: heating.danfoss.com.

1. Installation must be done by an authorised electrician.
2. The room thermostat should be installed at approx. 1.5 m above floor and where the effects of sunlight, draught or other heat sources (eg. TV’s) are avoided, see fig. 1.
3. First of all, carefully remove the cover, see fig. 2.
4. Connect the wire before mounting the back plate to the wall box using the enclosed screws. Then mount the cover to the back plate, see fig 3.

Wiring

Dimensions, see fig. 4. Wiring diagram, see fig. 5 (S1, S2: floor sensor terminals).
WT-D/P is often used with Danfoss TWA actuator. Depending on the conditions of power location and actuator type (NC or NO), the wiring between room thermostat and actuator is different.
Follow the illustrations to complete the wiring:

1. When power supply location is close to room thermostat:
   • Connect to actuator TWA 230 V NC type,see fig. 6.
   • Connect to actuator TWA 230 V NO type, see fig. 7.
2. When power supply location is close to actuator:
   • Connect to actuator TWA 230 V NC type, see fig. 8.
   • Connect to actuator TWA 230 V NO type, see fig. 9.

Error codes

Notes

1. Correct wiring is essential; using instrument to confirm L and N before wiring is recommended.
2. Don’t remove too much of the insulation cover from the wire to avoid short circuit caused by the naked wire touching the metal 86 size mounting wall box.
3. Don’t let the screw press or touch the wire when using screw to fix room thermostat in wall box. A short-circuit risk exists if the wire insulation cover is damaged by the screw, and if the naked wire connects with the screw.
4. If walls must be painted, mount the room thermostat after painting, to avoid dust or paint material penetrating the room thermostat and thus damaging the PCB.
5. The max load of relay is 3 A (resistive) or 1 A (inductive, such as pump, motor). The relay will be damaged if the load exceeds the limit.
6. Don’t cover the thermostat, for instance by hanging towels directly in front of it.
7. The room thermostat should be connected to the corresponding loop actuator in individual room temperature control.

Technical Specifications

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

VICUJ212 Produced by Danfoss Floor Heating Hydronics 03/2015

Documents / Resources

Danfoss WT-D,WT-P Room Thermostats [pdf] Installation Guide WT-D, WT-P, WT-D WT-P Room Thermostats, WT-D WT-P, Room Thermostats, Thermostats

References

• User Manual