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DF M
ANUAL
Installation, Operating And Maintenance Manual version 1.0 (16-08-2023)
2.5.1 Special points
c
Caution:
The central heating system's supply and return pipes
must be attached to the correct corresponding
connectors 1. On the unit, the directions are
indicated with arrows.
•
Keep the connectors 1 in place by using pliers when con-
necting the pipes.
•
Insert an isolation valve and a bleed valve on both pipes
close to the unit.
Application limitations for units with water heating
Heating medium
Maximum water
W2
temperatures
W4
Max. discharge
types S/M
temperature
type L
Maximum operating pressure
2.5.2 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.
2.5.3 Connecting the water-side control
The unit is fitted as standard with a connected three-way valve
inside the unit.
If a two-port valve is opted for (accessory), the valve is sup-
plied separately. In that case, connect the valve as follows:
I
NSTALLATION
water with max. 20%
glycol
90/70 °C
70/50 °C
55 °C
45 °C
8 bar
en-17
en
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