AERMEC ANZ 020 - Safety and Checking Components; Pressure and Temperature Safety Switches; Microprocessor Functions and Display

9
Safety and checking
components
High pressure switch
Placed on the high pressure side of
the refrigeration circuit, it shuts down
compressor operation in the case of
abnormal operating pressure.
Low pressure switch
Placed on the low pressure side of
the refrigeration circuit, it shuts down
compressor operation in the case of
abnormal operating pressure.
Water safety valves (only versions
with accumulation)
Placed on the water circuit delivery branch,
it cuts in when the operating pressure is
too high..
High-temperature thermostat
With fixed calibration, placed on the high
pressure side of the refrigeration circuit, it
shuts down compressor operation in the
case of abnormal operating temperature..
For models 090 - 100 - 150 - 200,
the thermostat is incorporated in the
compressor cut-out.
Differential pressure switch/ flow
switch
Supplied as standard on all sizes, it is
fitted between the inlet and outlet of the
exchanger and, if the water flow rate is
too low, it stops the compressor (whether
in heating or cooling mode). Models
020 - 025 - 030 - 041 are fitted with a
flow switch positioned up line from the
evaporator.
- thermomagnetic compressor protection;
- thermomagnetic fan protection;
- thermomagnetic auxiliary protection;
fan power remote switch,
Microprocessor
Evaporator inlet water temperature adjustment
G
Compressor start delay G
Summer or winter functioning in the heat pump G
with defrosting control
Low temperature device management (Accessory)
G
Compressor operation hour counter G
Pump operation hour counter G
Start Stop G
- Reset G
Autostart after voltage drop G
Operation with possibility of remote control G
Programmable timer function G
Machine status display: G
- Compressor - ON/OFF
- summer operation
- winter operation
Alarm management:
G
- high pressure
- differential pressure switch/ flow switch
- low pressure
- antifreeze
- compressor overload
Display of the following parameters:
G
- water inlet temperature
- water outlet temperature
- coil probe temperature (if there is one)
Alarm display
G
Set point: G
- hot setting
- cold setting
- cold differential
- hot differential
In addition, the card, on clamps 6-12 of M12, makes it possible to connect an external
alarm signal; this normally open contact is not live and can control a load of 250 V
- 1A.