Installation manual

installation manual TWIN 80 EN
19
2.7. Green connector block
The external regulations are to be connected to the green connector block.
All connections are volt-free contacts. Therefore, do not connect any
voltage to this block!
1. Strip about 5 mm off the insulation of the wires of the connection
concerned.
2. Stick the stripped ends of the wires into connections of the connection
block involved.
3. Make sure that the wires do not make a short circuit.
4. Firmly tighten the screws in the connection block.
2.7.1. 24 Volt on/off room thermostat (standard)
- When the room thermostat is closed (heat demand), the set
point (desired central heating flow temperature) rises at a rate
of 2°C per minute until the maximum permissible central
heating flow temperature is reached (21 minutes from minimum
25°C to 82°C).
- When the room thermostat is open (end of heat demand), the
set point (desired central heating flow temperature) falls at a
rate of 4°C per minute to the minimum central heating
temperature (10.5 minutes from 82°C to minimum 25°C).
• Connect the 24 Volt room thermostat to the green
connector block on contacts (1) and (2)
• On the master print check the connection of the
white terminal (default)
2.7.2. 0-10 Volt input regulation (standard)
- The set point indicates whether there is a heat demand.
- The desired central heating flow temperature (set point) is
given by the 0-10 Volt input.
- The regulation is field adjustable in the menu either on
temperature (°C) or on boiler input (kW)
• Connect the 0-10 Volt regulation to the green
connector block on contacts (1) and (2)
• On the master print check the connection of the
white terminal (default)
2.7.3. OpenTherm (standard)
- The desired central heating flow temperature (set point) is
indicated by the modulating OpenTherm room thermostat.
- With an outdoor temperature sensor, the measured outdoor
temperature is sent to the OpenTherm room thermostat, which
uses it to calculate the desired central heating flow
temperature.
• Connect the OpenTherm modulating room
thermostat to the green connector block on
contacts (1) and (2).
• RE-PLUG the connector of the Master to the blue
terminal (Master).
2.7.4. Outdoor sensor (standard)
- When an external outdoor temperature sensor (heating) is
connected, the sensor must be an NTC with a resistance of
12kOhm at 25°C
• Connect the outdoor sensor to the green
connector block on contacts (3) and (4).
24Volt on/off room thermostat
or
0-10Volt input
(if no regulation is used - bridge wire)
contacts (1) - (2)
room thermostat
OpenTherm
contacts (3) - (4)
outdoor sensor
external outdoor temperature sensor
(NTC of 12 kOhm at at 25°C)
contacts (5) - (6)
external cylinder
10 kOhm sensor
or
12 kOhm sensor
or
cylinder thermostat (on/off)
Green connector block
Maste
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