Danfoss Link™ Hc; Actuators; Relays For Pump And Boiler Control; Input For Away Function - Danfoss Link Hydronic Guide D'installation

Installation Guide Danfoss Link™ HC
4.1 Danfoss Link™ HC
Mount the Danfoss Link™ HC in an horizontal upright position.
Wall:
• Remove the front and side covers (fig. 3).
• Mount with screws and wall plugs (fig. 3).
DIN-Rail:
• Mount DIN-rail parts (fig. 4).
• Click on DIN-rail (fig. 5).
• Release from DIN-rail (fig. 6).
Important! Complete all the installations on the Danfoss Link™ HC as described below, before connecting
to a 230 V power supply!
4.2 24 V Actuators
• Connect the two actuator wires to an output (fig. 7).
• Fix the cable (fig. 8).
Note! If NC (normally closed) actuators are installed for ON/OFF regulation, no further actuator output
configuration is needed.
4.3

Relays for Pump and Boiler Control

• Connect wires for pump and boiler controls to their respective output (fig. 9).
• Fix the cable (fig. 10).
Note! The relays for pump and boiler are potential free contacts and can therefore NOT be used as direct
power supply. Max. load is 230 V and 8 A/2 A!
4.4

Input for Away Function

• Connect an external ON/OFF switch to the terminals for Away Function (Input 2). When this switch
is closed (ON) the system will override all room thermostat set points and change the temperature
to 15 °C (fig. 11).
• Fix the cable (fig. 12).
Note! 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.
4.5

Input for Heating and Cooling

• Connect an external ON/OFF switch to the terminals for Heating and Cooling (Input 3) (fig. 13).
With the switch closed (ON), the system will switch from heating to cooling mode.
• Fix the cable (fig. 14).
Note! With the system 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 a dew-point sensor should be installed.
4.6

Wiring

Input
Input 1
Input 2
Input 3
Max. 3 m
External
antenna
4.7

Power Supply

Connect all actuators (TWA), before mains powering the unit!
Then, connect the Danfoss Link™ HC power supply plug to a 230 V power supply, when all actuators,
pump and boiler controls and other inputs are installed. The Danfoss Link™ HC is now ready to be
added to the Danfoss Link™ CC.
Note! If the power supply plug is removed from the power supply cable during installation, ensure that the
connection is made according to existing law/legislation.
Danfoss Heating Solutions
Relays
1 2 3
L N L N
VIFZL55X
Actuator outputs
4 5 6 7 8 9 10
2019.09 7
EN