Danfoss produces
and markets a wide variety of Thermostats
and Pressure Controls for refrigeration
applications. The Appliance Controls
product range comprises CFC-free electromechanical
and Electronic Thermostats for refrigerators,
freezers and light commercial applications
produced to customer specifications
as well as service thermostats for
all refrigeration and freezing applications.
The Pressure Controls and Thermostats
for commercial and industrial refrigeration
covers numerous applications within
refrigeration and air conditioning,
and are divided into two categories:
KP as standard and RT for heavy duty
purposes. They are available for fluorinated
refrigerant as well as ammonia. Furthermore
the category contains Oil Differential
Pressure Controls, Cartridge Pressure
Controls and Flow Switches.
KP pressure controls are for use in
refrigeration and air conditioning
systems to give protection against
excessively low suction pressure or
excessively high discharge pressure.
The controls are also used for starting
ans stopping refrigeration compressors
and fans on air- cooled condensers.
KP pressure controls are available
in IP 30 and IP 44 enclosures.
MP 54 and MP
55 oil differential pressure control
are used as safety switchesto protect
refrigeration compressors against
low lubricating oil pressure.If the
oil pressure fails the oil differential
pressure control stops the compressor
after a certain time period. MP 54
and MP 55 are used in refrigerating
systems using fluorinated refrigerants.
MP 55A is used in refrigerating systems
with R717 (NH3). MP 55A can also be
used in systems with fluorinated refrigerant.
It also incorporates a thermal time
relay with a fixed release time setting.
MP 54 and MP 55 have adjustable differential
pressure and are available both with
and without thermal time relay.