DF M
ANUAL
I
NSTALLATION
Manual version 3.0 (21-11-2017)
en-15
en
2.4.2 Frost protection
Take the following precautions if you install the unit in a room
where frost may occur:
• Ensure constant circulation of the water at the right tem-
perature;
• Add up to 20% glycol to the water when the unit is not in
operation during the wintertime;
• Or bleed the system and the unit.
2.4.3 Connecting the water-side control
The unit is fitted as standard with a connected three-way valve
inside the unit.
If a two-way valve is opted for (accessory), the valve is sup-
plied separately. In that case, connect the valve as follows:
1. Connect the unit and the two-way valve to the central
heating system as shown in the diagram.
2. Connect the valve’s plug to the unit’s plug.
3. Open the valve manually using the handle (Position ‘MAN’).
4. Fill and bleed the system.
5. Check the connections for leakage.
6. Return the handle to its starting position
(Position ‘AUTO’).
2.5
Connecting the unit to the mains supply
2.5.1 Special points
For all models:
Warning:
w
The unit must be earthed.
Warning:
w
The unit must be connected in accordance
with the applicable local requirements.
