I
NSTALLATION
C
OMFORT
A
IR
C
URTAIN
16
2.5.2 Frost protection
The electronic control features integrated frost protection. It
works in two stages:
1. If the discharge air temperature falls to below 5 ºC:
-
the control panel will temporarily display fault message
E6 (see section
6.3
);
-
the valve of the integral water control will open fully;
-
the unit’s output will transmit a signal for the central
heating system (if set so, see section
4.5.6
, value 15).
2. If the discharge air temperature falls to below 2 ºC:
-
fault message E6 will become final;
-
the air curtain is switched off.
The frost protection is automatically lifted when the entering
or leaving air temperature rises to above 8 ºC.
Caution:
c
The frost protection reduces the risk of freezing but does
not warrant 100% protection.
Take the following precautions if you install the unit in a
room where frost may occur:
-
Provide for constant circulation of the water at the
right temperature.
-
Add glycol to the water when the unit is not in opera-
tion during the wintertime.
2.5.3 Performing connection
1. Connect the unit to the central heating system.
2. Vent the heat exchanger.
3. Check the connections for leaks.
2.6
Connecting the unit to the power supply
2.6.1 Connecting water-heated models (CA W)
1. Ensure that an (earthed) power point is available at a maxi-
mum of 1.5 m from the left side of the unit.
Warning:
w
The unit must be earthed.