A04 MODEL – CONSTANT DIFFERENTIAL THERMOSTAT WITH ALARM
The A04 is a constant differential thermostat and therefore the difference between cut-in and cut-out temperature is constant over the whole range. It also has a signal switch which closes in the event of abnormal temperature rise. The minimum differential that can be obtained is 3°C. Calibration is carried out at a barometric pressure of 740 mmHg.
The A04 type Is used to control the evaporation temperature:
– freezers with signal
– other refrigeration appliances with signal
A04 thermostats are compact, robust, and small in size. All their components are made in conformance to Directive 2002/95/CE R0HS, and in particular they have no Cr VI, while the gas used is CFC FREE in compliance with environmental standards.
ELECTRICAL CHARACTERISTICS AND TERMINALS
The terminals are disconnectable tabs with three standard sizes:
2.8 x 0.5mm, 6.3 x 0.8mm and 4.8 x 0.8mm
A04 thermostats have 2 terminals for earth connections:
6.3 x 0.8mm and 4.8 x 0.8mm fastons
3-4 terminals: 6(6)A250V~µ
3-6 terminals: 0.1 A250V~µ
The capillary tubes are made of copper with 3µ tin finishing. They can be supplied covered with a white extruded sleeve.
Standard length: 300mm with steps of 50mm up to 3000mm. Upon request we can supply capillary ends with bulbs or curl. To ensure correct position, it must be in contact with the coldest part of the appliance. There must be a good physical contact between the evaporator and at least the last 120mm of the capillary, it is advisable to position this part of the capillary pointing slightly downwards. If there is insufficient space, the end of the capillary can be bent around the evaporator respecting the minimum bending radius.
ENEC 03 / UL / CSA