CLIMAVENETA CHD U-2T 1109, Operating And Installation Manual, Page: 25 / 38

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WALL-MOUNTED CONTROLS User
DESCRIPTION OF FUNCTIONS
SUMMER mode of operation
The Summer mode is selected by setting the mode selector
on the relative symbol
. In this mode the resources are
managed as follows:
- the summer mode valve is always ON;
- the winter mode valve is always OFF;
- the fans are always enabled and operate at the speed set
with the fan speed selector.
WINTER mode of operation
The Winter mode is selected by setting the mode selector
on the relative symbol
. In this mode the resources are
managed as follows:
- the summer mode valve is always OFF;
- the winter mode valve is always ON;
- the fans are always enabled and operate at the speed set
with the fan speed selector.
Hot Start function
This function is available in the heating mode, connecting
the control with Minimum Temperature Thermostat kit. This
function activates the fan if the water is hot enough. It is not
available if the heating element is installed.
CONFIGURATION OF THE NSW CONTROL
Digital outputs
YV1 Valve control (max 1,5 A).
This is used for opening of the delivery valve and the conse-
quent flow of water into the coil, as described below:
- 2-pipe system: the valve controls either the COOL circuit
or the HEAT circuit;
- 4-pipe system: the valve controls just the COOL circuit.
Place the water probe on the hot water coil.
YV2 Valve or heating element control (max 1,5 A).
This is used to govern, according to the application:
- 2-pipe system: the control heating;
- 4-pipe system: the delivery valve of the HEAT circuit.
Digital inputs
Minimum thermostat input.
Closed contact (default) fans on.
Open contact fans off.
The current required by the fan passes through the termi-
nals of the digital input.