20
Subject to change without notice | 83056700fUK – Translation of the original operating manual | ait-deutschland GmbH
7.5
Flush and fill the heating and
domestic hot water charging
circuit
Drain pipe of the safety valve is connected.
The front panel of the module box is unscrewed.
►
Ensure that the set pressure of the safety valve is
not exceeded.
1.
Pull the U-clip (2) off the floor of the valve mo
-
tor (1).
2.
Pull the valve motor carefully upwards and off the
3-way changeover valve (3).
3. Turn the spindle of the 3-way changeover valve so
that the rounded side of the spindle points in the
direction of marking A of the connections of the
3-way changeover valve.
A
B
4. Flush the domestic hot water charging circuit for
approx. 1 minute.
5. Turn the spindle so that the rounded side of the
spindle points in the direction of marking B of the
connections of the 3-way changeover valve.
6. Flush heating circuit thoroughly, until no more air
is discharged.
7. Position the valve motor (1) on the 3-way change-
over valve (3).
8.
Insert the U-clip (2) into the floor of the valve mo
-
tor.
9. Ensure that the U-clip has latched into position
correctly:
Valve motor sits securely on the 3-way changeo-
ver valve.
Both prongs of the U-clip sit on the lug.
The tips of the U-clip are visible by approx. 2 mm
(not significantly more
!).
10. Screw the front panel of the module box.
8 Insulate hydraulic connections
1. Insulate heating circuit and heat source according
to the local regulations.
2.
Open shut-off devices.
3.
Perform a pressure test and check for leaks.
4. Insulate the internal piping of the module box with
the insulation material from the separate pack
included.
5. Insulate external piping on site.
6.
Insulate all connections, fittings and pipes.
7.
Insulate heat source so that it is vapour-diffusion
tight.
8. Insulate the heating circuit of units with cooling
vapour-diffusion tight too.
9.
In units with cooling and capacity 14 kW and
higher, insulate the venting valve at the cold heat
exchanger too so that it is vapour-tight. To do this,
glue the insulation strips on top of each other
(
separate pack)
