Danfoss FH-WT/-WP/-WS Room Thermostats, 24 VAC
Data Sheet
Application
The electronic room thermostats FH-WT/-WP/-WS are used for single room temperature control, primarily in hydronic floor heating systems.
LEDs behind the front cover indicate heat demand.
The document displays images of two thermostat models: the FH-WT/FH-WS, featuring a circular dial for temperature setting and buttons, and the FH-WP, which appears to have a similar dial but is designed for tamper-proof, flush mounting.
FH-WT: A standard room thermostat.
FH-WS: A thermostat with manual night set-back and optional connection for a floor sensor. If a floor sensor is connected, minimum or maximum regulation is selected with a switch, depending on the type of floor (e.g., wooden floor for max regulation, tiles for min regulation).
FH-WP: A tamper-proof model of the FH-WS, designed for use in public environments such as schools.
All thermostats are provided with easy maximum and minimum limitation of the setting range, as well as thermal feedback to improve accuracy.
Ordering
| Product | Type | Model | Temp. range | Code no. |
|---|---|---|---|---|
| Room thermostat | FH-WT | Standard | 6 - 30°C | 088H0022 |
| Room thermostat | FH-WP | Public | 6 - 30°C | 088H0023 |
| Room thermostat | FH-WS | Featured | 6 - 30°C | 088H0024 |
Accessories
| Product | Type | Code no. |
|---|---|---|
| Floor sensor (NTC, 30 kΩ, 20° C, cable 3 m) | FH-WF | 088H0025 |
Technical Specifications
| Power supply | 24 VAC, 50/60 Hz |
| Hysteresis | 0.5 K |
| Temperature range | 6 - 30°C |
| Frost protection temperature | Min. 4° C |
| Ambient temperature | 0 - 50°C |
| Transport temperature | -20 - 60° C |
| IP class | IP20 |
| ErP class | ErP Class A (1%) |
| Weight | 100 g |
Diagrams and Layout
Connection Diagram
A connection diagram illustrates the wiring for FH-WT, FH-WP, and FH-WS thermostats. It shows connections to a 24 VAC power supply and a 24 V connection box (FH-WC), detailing the use of terminals like L, N, TA, TWA, and an LED indicator.
The diagram includes the text: "Connection of FH-WT/-WP/-WS to FH-WC 24 V connection box (see appropriate data sheet for further information)."
System Layout
The system layout diagram depicts a typical installation with a central connection box (FH-WC) and multiple room thermostats (FH-Wx) connected via a TWA unit, illustrating the overall system architecture.
Dimensions
Dimension diagrams provide the physical measurements for the thermostats. The FH-WT & FH-WS models are shown with a width of 77.5 mm, height of 60 mm, and depth of 28 mm. The FH-WP model shares these dimensions.
