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4.3
Electrical connection
Beware of electrocution
Always switch off the power supply before installation.
Make sure it is secured against being switched on again
unintentionally.
4.3.1 HUV 1 | HUV 2
Connection diagram (open/closed control)
N
L1
1
2
Beware of damage
!
Only the factory-set open/close setting may be used in
STIEBEL ELTRON or Tecalor heat pump systems.
The 3-way diverter valve is factory-set to flow direction B - AB.
To change the flow direction to A - AB, change the covered rotary
selector from Y2 to Y1.
HUV 1/2/65/80
3
Y2
4.3.2 HUV 65 | HUV 80
Connection diagram (open/closed control)
a
a
b
b
1 blue
2 brown
3 white
5.
Maintenance
The 3-way switching valves with integrated servo drive require no
maintenance. They do not contain any parts that can be replaced
or repaired by the user.
Beware of electrocution
Always switch off the power supply before maintenance.
Make sure it is secured against being switched on again
unintentionally.
Beware of burns and scalding
Let the pipes on the relevant section cool down as neces-
sary and reduce the system pressure to ambient pres-
sure.
Beware of damage
!
Switch off the pumps for the relevant pipe section and
close the associated shut-off valves.
The system may only be started up again once the 3-way switching
valves with integrated servo drive have been correctly fitted and
the pipes correctly filled.
N
L
1
2
3
a
b
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