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3.5 Pipe installation
The domestic hot water tank (upper) is designed
to be permanently connected to the mains water
supply. The buffer tank (lower) is designed to be
permanently connected to the heating system,
with max. pressure 3 bar / 0.3 MPa. A separate
safety valve with rated opening pressure max. 3.0
bar must be installed in the heating system. Ap-
proved pipes of the correct size should be used
for installation. The relevant standards and regu-
lations must be followed.
3.5.1 Heating and domestic hot water
Use connectors that reduce transfer of vibration,
and can withstand the water temperature and
pressure. To avoid "taps" in the heating system,
the pipes must be able to withstand temperature
differences.
3.5.2 Pipe connection dimensions
Cold water
Hot water
inlet
outlet
ø 22
ø 22
3.5.3 Pipe installation procedure
1.
Place the unit in the desired position. Adjust
unit to a level position by using the adjust-
able feet. The tank must be levelled before
it is connected and filled with water. Remove
front cover, see pt. 3.5.4.
2.
Flush/clean the existing heating system care-
fully to avoid contaminating the particle filter.
3.
Connect the domestic water supply. A mixing
valve is recommended to avoid scalding.
4.
Connect the unit supply and return pipes
to the existing heating system. The various
pipes are marked on the top of the tank.
5.
Connect an escape pipe and tundish be-
tween the Temperature & Pressure relief
valve and the floor drain.
6.
Connect an escape pipe between the radia-
tor safety valve and the floor drain.
7.
Verify if the expansion vessel is dimensioned
for the heating system (approx. 10% of the
total volume in the system.)
8.
Check the re-pressure of the expansion ves-
sel. The pressure depends on how high the
water has to be lifted.
9.
Fill the domestic hot water tank before filling
the buffer tank. Open a hot water tap to ven-
tilate and allow free flow of water.
8
HP
HP
Rad.
Rad.
flow
return
flow
return
ø 22
ø 22
ø 22
ø22
10. Put the 3-way valve manually in "fill mode"
(both flow way open) and open the manual /
automatic air vent.
11.
Fill the radiator system and close the manual
air vent.
12. Keep the pressure within the recommended
pressure range to prevent the water escap-
ing through the safety valve. Restore the
3-way valve in automatic position.
13. Bleed the radiators. Check the system pres-
sure. Fill more water to the system if needed.
Repeat until all air is bled from the system.
14. Check if the diverting valve switches to radia-
tor operation and that the radiators heat up.
Bleed the system once it is warm. Check for
leaks in the system.
15. Close the automatic air vent after approx. two
weeks to prevent air from entering the system.
3.5.4 Removing the front cover
Drain
1.
Unscrew and remove the two screws in
the lower part of the front panel (1).
DN15
2.
Pull out the lower part of the front approx.
100-150mm. (2).
3.
Grip the sides of the front panel and lift it
straight up (3).
4.
Remove the front panel carefully to not
damage the contact or the cable connec-
tion between the display and the control
unit inside the front panel.
3
2
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