CLIMAVENETA a-CHD U-2T Serie Manual De Instalación Y Funcionamiento página 75

WALL-MOUNTED CONTROLS
DESCRIPTION OF FUNCTIONS
SUMMER mode of operation
The Summer mode is selected by setting the mode selector
on the relative symbol
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
managed as follows:
- the summer mode valve is always OFF;
- the winter mode valve is always ON;
- the fans are always enabled according to Hot Start func-
tion, and operate at the speed set with the fan speed
selector.
Hot Start function
This function is available in the heating mode, but only acti-
vates the fan if the water is hot enough. It is not available if
the heating element is installed.
. In this mode the resources are
. In this mode the resources are
CONFIGURATION OF THE MTW CONTROL
Analog inputs
Air sensor input included in MTW control:
- analog input used for temperature control.
Water sensor input (kit included):
- analog input used for measuring the temperature of the
water or the coil;
- sensor length: 3000 mm;
- sensor position without valve: inserted in a copper bulb in
direct contact with the copper water pipe.
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 or additional heating elements;
- 4-pipe system: the delivery valve of the HEAT circuit.
User
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EN