HRT4-ZW is a wireless Z-wave electronic room thermostat, supplied with an ASR-ZW receiver featuring load compensation software.  The use of wireless communications helps to avoid disruptive and time-consuming wiring. It has been purpose designed to offer the latest energy saving control technology, combined with our established design and manufacturing expertise, making it suitable for use in most types of heating system.

It is also a perfect partner for use with Horstmann programmers and zone valves.

Proven Z-Wave wireless technology is used for communications between the thermostat and the receiver. The battery powered thermostat unit displays RF status, while the receiver is mains powered and features volt-free contacts.

HRT4-ZW has additional functionality that can be utilised when integrated within a larger Z-wave system. For example, it can receive set point temperature messages from another controller, and can be used as a temperature sensor.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Application

  • Domestic gas or oil-fired central heating and hot water systems

    A 3-ampere wireless relay is included in the box, making HRT4-ZW ideal for controlling gas or oil-fired central heating systems. Load compensation software significantly improves the efficiency of the boiler by preventing short-cycling, while maintaining consistent comfort.

    Combi boiler control

    The single-channel relay supplied with the HRT4-ZW is excellent for controlling a combi boiler, and the load compensation software ensures the most efficient operation. It requires only minimal wiring between the boiler and the relay.

    Zone control

    HRT4-ZW is ideal for controlling individual heating zones and is very easy to install. It is battery powered and communicates using mesh radio, so it only needs control wiring. This gives maximum flexibility in choosing the best location to mount the device.

    New systems

    The flexibility and ease of positioning, due to battery power and wireless communications, make HRT4-ZW ideal for new installations.

    Replacement of conventional room thermostats

    HRT4-ZW fits on to the industry standard 6-pin wall plate, so it can be fitted as a drop-in replacement for most other existing thermostats. 

  • Key Feature

    • Z-Wave®  mesh radio connection between thermostat and receiver
      • No wires
      • Quick and easy to install
    • Sophisticated load compensation algorithm
      •  Improves energy efficiency
      • Consistent and accurate control, while minimising temperature overshoot 
    • Compatible with most heating systems
      • Drop-in replacement for many existing thermostats
      • LCD with current ambient and set point display modes
      • Easy to read and user friendly
    • Volt-free contacts
    • Battery operated
      • Uses 2 x AAA cells, with battery life in excess of two years
    • Specification
    • What's in the box
    • Thermostat

      Electrical

      Purpose of control

      Electronic room thermostat RF (independently mounted)

      Supply

      3 V DC (2 x AAA alkaline batteries)

      Software Class

      Class A

      Radio

      Mesh radio type

      Z-Wave

      Operating frequency

      868.42 MHz (EU)

      Receiver Category

      Category 3

      Power Class

      Class B

      RF Range

      ≈100 m line of sight

      Mechanical

      Dimensions

      86 mm x 86 mm x 36 mm

      Case material

      Flame-retardant thermoplastic

      Ball pressure test temperature

      75 ˚C

      Mounting

      Industry standard 6-pin wall plate

      Environmental

      Impulse voltage rating

      Cat II 2500V

      Enclosure protection

      IP30

      Pollution Degree

      Degree 2

      Operating temperature range

      0 ˚C to +40 ˚C

      Compliance

      Design standards

      EN 60730-2-9

      R&TTE

      ETSI EN 300 220-2

      ETSI EN 301 489-3

      Receiver

      Electrical

      Purpose of control

      Electronic multi-purpose control (independently mounted)

      Contact rating

      3 (1) A, 230 V AC

      Contact type

      Micro-disconnection

      Supply

      230 V AC, 50 Hz only

      Control action

      Type 1B

      Operating time limitation

      Intermittent

      Software Class

      Class A

      Radio

      Mesh radio type

      Z-Wave

      Operating frequency

      868.42 MHz (EU)

      Receiver category

      Category 3

      Power class

      Class B

      RF range

      ≈100 m line of sight

      Mechanical

      Dimensions (W x H x D)

      86 mm x 86 mm x 36 mm

      Case material

      Flame-retardant thermoplastic

      Ball pressure test temperature

      75˚C

      Mounting

      Industry standard 6-pin wall plate

      Environmental

      Impulse voltage rating

      Cat II 2500V

      Enclosure protection

      IP30

      Pollution Degree

      Degree 2

      Operating temperature range

      0 ˚C to +40 ˚C

      Compliance

      Design standards

      EN 60730-2-7

      R&TTE

      ETSI EN 300 220-2

      ETSI EN 301 489-3

       

      • HRT4-ZW thermostat
      • ASR-ZW single-channel receiver/relay
      • 2 x standard 6-pin wall plates
      • User guide and installation manual
      • 2 x AAA batteries (long life)