Danfoss Link HC Hydronic Controller

Specifications

• Product Name: Danfoss LinkTM HC Hydronic Controller
• Wireless control system for various heating systems
• Allows wireless control of manifolds for water-based floor heating/cooling
• Output LEDs: Boiler relay, Pump relay, Output connections
• Features Install/Link Test, External Antenna, Front cover release
• Inputs: Away Function (external ON/OFF switch), Heating/Cooling (external ON/OFF switch)

Introduction

Danfoss Link™ is a wireless control system for a variety of heating systems.
The Danfoss Link™ HC (Hydronic Controller) is a part of this system allowing wireless control of manifolds for water based floor heating/cooling.

Mounting
The Danfoss Link™ HC should always be mounted in an horizontal upright position.

Mounting on wall

Mounting on DIN-rail

Connections
Make sure that all connections to the Danfoss Link™ HC are completed, before connecting to a 230 V power supply.

1. Connecting actuators (24 V)
   If NC (normally closed) actuators are installed for ON/OFF regulation, no further actuator output con-figuration is needed.
2. Connecting pump and boiler controls
   The relays for pump and boiler are potential free contacts and can thus NOT be used as direct power supply. Max. load is 230 V, 8 (2) A.
3. Connections for Away Function
   The Away Function ensures a set room temperature fixed at 15°C for all Room Thermostats, but it can be changed with the Danfoss Link™ CC.
4. Connections for Heating & Cooling
   When the system is in cooling mode the actuator output will be activated (ON for NC actuators / OFF for NO actuators) when the temperature in a room exceeds the set point.
   When the system is in cooling mode an independent dew-point alarm function should be installed.
5. Power supply
   When all actuators, pump and boiler controls and other inputs are installed, connect the supply plug to a 230 V power supply.
   If the power supply plug is removed during installation, make sure that the connection is made ac-cording to existing law/legislation.
6. Wiring diagram
7. External antenne
   The external antenna is installed as diverter when there is no transmission possible through a large building, heavy construction or metal barrier, e.g. if the Danfoss Link™ HC is located in a metal cabinet/box

Configuration

1. Adding Danfoss Link™ HC to the system
   Adding Danfoss Link™ HC to a system is made from the Danfoss Link™ CC Central Controller. For further information, see the Danfoss Link™ CC instruction manual: Configuration 7: Adding service devices.
2. Configure Danfoss Link™ HC
   Configuration Danfoss Link™ HC to a system is made from the Danfoss Link™ CC Central Controller. For further information, see the Danfoss Link™ CC instruction manual: Configuration 7: Adding service devices.2a: Configure outputs 2b: Configure inputs
3. Add an output to a room
   Configuration Danfoss Link™ HC to a system is made from the Danfoss Link™ CC Central Controller. For further information, see the Danfoss Link™ CC instruction manual: Configuration 7: Adding service devices.
4. Configure a room
   • Forecasting method:
     by activation of the forecast method, the system will automati-cally predict the heating start-up time necessary to reach desired room temperature at desired time.
   • Regulation type:
     only in connection with electrical heating systems.
5. Remove an output
6. Factory reset
   • Disconnect the power supply for Danfoss Link™ HC.
   • Wait for green LED to turn off.
   • Press and hold the Install / Link Test.
   • While holding the Install / Link Test, reconnect the power supply.
   • Release the Install / Link Test, when the LED’s are on.

Troubleshooting

Degraded mode	The actuator will be activated with a 25% duty cycle, if the signal from the room thermostat is lost.
Flashing output / alarm LED(s)	Output or actuator is short-circuited or the actuator is disconnected.

Technical specifications

Transmission Frequency	862.42 Mhz
Transmission range in normal constructions	up to 30 m
Transmission power	< 1 mW
Supply voltage	230 VAC, 50 Hz
Actuator outputs	10 x 24 VDC
Max. continued output load (total)	35 VA
Relays	230 VAC / 8 (2) A
Ambient temperature	0 – 50°C
IP class	30

Disposal instructions

Danfoss A/S

• Heating Solutions
• Haarupvaenget 11
• 8600 Silkeborg
• Denmark
• Phone: +45 7488 8000
• Fax: +45 7488 8100
• Email: heating.solutions@danfoss.com
• www.heating.danfoss.com

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

FAQ

• Q: Can the Danfoss LinkTM HC control both heating and cooling systems?
  A: Yes, the Danfoss LinkTM HC can control manifolds for both water-based floor heating and cooling systems wirelessly.
• Q: What is the maximum load for pump and boiler controls?
  A: The maximum load for pump and boiler controls is 230 V, 8 (2) A.

Documents / Resources

Danfoss Link HC Hydronic Controller [pdf] Installation Guide AN10498646695101-010301, Link HC Hydronic Controller, Link, HC Hydronic Controller, Hydronic Controller, Controller

References

• User Manual