Vaillant geoTHERM Serie Guia Del Usuario página 34

1 Notes on the documentation
8 Control system
1 Notes on the documentation
1.1 Applicability of the installation manual
This supplement to the installation manual applies solely
to the Vaillant appliances listed in the following table.
Type
geoTHERM
geoTHERM exclusive, 230 V
Table 1.1 Appliances and part numbers
Addendum to Chapter 8.4, Description of the
controller
8.4.6 Automatic cooling control
Automatic cooling control is only implemented if a hy-
draulic plan greater than four is set and the heat pump
supports cooling operation.
The controller activates the heat pump for heating or
cooling depending on the outside temperature. For heat-
ing, the current outside temperature is monitored, while
for cooling it is the 24-hour mean that is relevant.
The conditions described below also apply.
Heating:
If the outside temperature is below the presettable
switch-off limit, the heating mode is enabled.
Stand-by:
The heating pump remains in stand-by if the conditions
for heating or cooling are not fulfilled, or during the
transition times from heating to cooling or vice versa.
Cooling:
If the current outside temperature is greater than the
preset switch-off limit and the mean outside tempera-
ture is greater than the preset cooling start limit, the
heat pump switches over to cooling mode.
In order to prevent a direct changeover between heat-
ing and cooling that does not make sense from an ener-
gy point of view, the transition always takes place via an
intervening period in stand-by.
2
Appliance Part number
VWS 220/2 0010002797
VWS 300/2 0010002798
VWS 380/2 0010002799
VWS 460/2 0010002800
VWS 63/2 0010005504
VWS 83/2 0010005505
VWS 103/2 0010005506
For the transition:
Stand-by
Heating
The stand-by period is at least six hours. The conditions
for heating (= outside temperature continuously below
the presettable switch-off limit) must not be present
during this stand-by period.
For the transition:
Cooling Stand-by
The condition for heating must already have been
present continuously for six hours. Following that there
is a stand-by period of at least six hours during which
the condition for heating must also be present continu-
ously, before the switchover to heating mode occurs.
This yields the overall conditions for the defined transi-
tions.
For the transitions:
Heating Stand-by
Cooling Stand-by
The minimum times for the outside temperature with re-
spect to the switch off limit are not taken into consider-
ation.
Supplmentary sheet to the installation manual geoTHERM VWS 0020079998_00
Cooling
Heating
Heating
Cooling