DE DIETRICH ROE-II _ ROE-H - Manual (Page 34)

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ROE-II / ROE-H 13/01/2011 - 300019360-001-I
6.2 Underfloor heating / cooling
The switch over between winter and summer is handled by an
automatic switch on the regulator, which operates according to the
outside and inside temperatures.
The current operating mode (summer / winter / unoccupied) can be
checked on the control panel on the hydraulic module.
6.3 Checking and maintenance
Z
See: Technical and installation instructions for the interior
hydraulic module.

Maintenance operations must be done by a qualified
engineer.
An annual inspection is compulsory.
Only original spare parts must be used.
` Check the watertightness of the connections using a leak
detector.
` Check the watertightness of the water connections.
` Check the water pressure in the installation several times a
year.
` Check that the filters are not obstructed.
` Clean and dust the outdoor module.
 Important note :
In the event of work requiring a vacuum, the exterior unit must
remain powered up in order to ensure that the solenoid valves
open to be able to guarantee that all of the hoses dry out.
ROE H:
Before starting evacuation, proceed as follows:
- Cut off the mains supply to the MIT inside module.
- Cut off the power to the outside unit, wait 30 seconds and then
switch the power back on. The heat pump goes into STOP/
ANTIFREEZE mode.
- Start evacuation. When the heat pump detects a drop in pressure,
the YL2 solenoid valve opens to allow evacuation of the
refrigerant trapped between the solenoid valve and the non-return
valve.
- The valve stays open as long as the pressure is lower than 1 bar,
for a maximum duration of 2 hours.

If recycling the refrigerant contained in the heat pump:
Drain the water from the plate exchanger.
or ensure that the primary pump on the HP - MIT circuit is
operating to prevent the plate exchanger from freezing and
breaking.