Installing The Vr 65 With A Ntc - Vaillant Control Center VR 65 Installation Instructions Manual

5.3

Installing the VR 65 with a NTC

Note!
To comply with the approvals, the boiler must
be Vaillant ecoTEC if the cylinder NTC solution
is used.
Before installing the NTC, first remove the cylinder con-
trol with two capillary tubes for the cylinder thermostat
and thermal cut out.
The cylinder control is be fitted in one of two ways
(A or B).
• Disconnect the wires (1) from the terminal block of the
cylinder control (a).
• Version A, fig. 5.4:
Unclip the cylinder control (a) and remove it from the
terminal box (see 2, fig. 5.4).
(Version B, fig. 5.5:
To remove the cylinder control (a) release the clips
with two screw drivers as shown in fig. 5.5)
• Remove the capillary tubes (3) of the thermostat and
the thermal cutout from the dry pocket of the
uniSTOR.
Ensure that the capillary tube of the immersion sensor
is not removed.
• Now the NTC can be pushed into the free dry pocket
of the cylinder as shown in fig. 5.6.
• The NTC is wired into the VR 65 as shown in fig. 5.2 or
fig. 5.3.
b
1
a
2
3
Fig. 5.4 Removing the cylinder control (Version A)
Legende:
a Cylinder control
b Immersion Heater Control
Installation Instructions for Control Center VR 65
Electrical installation 5
b
1
a
3
Fig. 5.5 Removing the cylinder control (Version B)
Legende:
a Cylinder control
b Immersion Heater Control
Fig. 5.6 Installing the NTC
9