Vaillant VRT-PZA Manual De Istrucciones página 34

B Installations instructions – 8 Installation
8.1 Warning
The installation, electrical connection, settings in the
appliance as well as the initial taking into operation
shall only be carried out by an authorized installer.
8.2 Possible use
The room thermostat VRT-PZA can be connected
without difficulty to all Vaillant THERMOcompact/
COMBlcompact appliances VR... or VCW... with 24-V
thermostat input (terminals 7, 8, 9).
The mounting plate may be connected to the already
existing connections of a former type of Vaillant room
thermostats or even replace a room thermostat built
by another manufactorer with the 48...60 x 66...65
gauge.
The room thermostat VRT-PZA is factory-set to on/off
control. The setting may be changed by your
authorized installer to analog (continous) control as
described in chapter 10.2. It is not necessary to
change the electrical connections.
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(Fig. 7)
8.3 Pump setting
After the connection of the room thermostat VRT-PZA,
the pump cannot be operated „continously" any longer.
If the pump is set to this mode, it will automatically
operate in the mode „permanent running" for
functional reasons. Set the pump selector to „s" or „II".
8.4 Interference suppression
The room thermostat is interference-suppressed accord-
ing to VDE 0875 with the suppression factor „N".
In case it is used with other appliances together in one
installation, this suppression factor „N" will be gener-
ally met provided that all other devices are factor „N"
interference-suppressed.