Westric IW Series, Installation, Operation And Maintenance Manual

Page: 10 / 82

76-5276-05 Page 10 of 82
Control Panel
The units are controlled by a built-in panel. The panel houses the controller, which are connected to other units via
interconnection terminals.
Therefore, the operation of the unit is entirely automatic.
The controller has a Flash memory which records the operating program and it also has multiple inputs and outputs. The
unit receives data from sensors and controls different elements of the system.
Using the display and keypad built into the controller makes it possible not only to obtain data about the conditions in the
room, but also the fault data log. Using an access code or password the user can enter the menu to change temperature
or humidity set points, cycling parameters, etc.
The control panel is able to receive the signal from a power-free contact from a fire control room; this signal is used to
switch off the units in case the fire alarm is triggered.
Main elements of unit panel:

Microprocessed controller

Power Supply Transformer

General circuit breaker

Air inlet/outlet temperatura sensors

Relative Humidity Sensor

Phase monitoring relay

Terminal blocks

Controller. Each system is controlled by a dedicated controller for air conditioners.

Temperature sensor. This sensor sends information to the Controller about changes in room temperature.

Humidity sensor. This sensor sends analog information to the Controller about changes in room humidity.

Controller alarm outputs. The system has alarm outputs which are triggered when one or more units are out of
service.

Phase monitoring relay. This sensor is used to detect under- or overvoltage conditions, missing phase or phase
asymmetry.