1
CPU-unit
SUPPLY-unit
User manual ALFA-45A
Cool/Defrost thermostat
with Fan control and
Watch Alarm.
VDH doc. 011524
Version: v1.2
Datum: 27-10-2005
Software: ALFA 45A
Doc: Do011524.wpd
Range: -50/+50
C, per 1
C
* Installation.
The
ALFA-45A
consist of two parts, a Supply-unit for rail-mounting and a CPU-unit for front-mounting
(with operation buttons, display and alarm relay). These two units are connected with each other by an
cable with 8-pole data-connector.
On the front of the
ALFA-45A Modulbox
supply-unit
is shown how sensors, power supply and relay
are to be connected. The watch alarm relay with C/NC contact is to be connected on the
CPU-unit
.
After connecting the
ALFA-45A
to the power supply, a self test is started. As this test is finished the
measured temperature of the product-sensor appears in the display.
The Supply-unit has three relay outputs, one for the compressor, one for the fan and one for defrost.
The compressor-relay and the defrost-relay got there own led-indication in the display.
* Control.
The
ALFA-45A
thermostat can be controlled by three pushbuttons on the front. These keys are:
SET
- view / change of settings.
UP
- increase of settings.
DOWN
- decrease of settings.
