© Danfoss | DCS (jmn) | 2017.04
DKRCC.PI.CA0.C4.02 | 520H11925 | 3
1.
The KP-E can be applied on systems with R290, R444B, R600, R600a, R1234ze, R1290 as the working fluid.
For countries where safety standards are not an indispensable part of the safety system Danfoss recommend the installer to get a
third party approval of the system containing flammable refrigerant.
Note, please follow specific selection criteria stated in the datasheet for these particular refrigerants.
2.
The refrigeration system must always comply with European Ex installation standard, EN 60079-14, any local directive and
legislation as well as any other regulation applying in the area of installation.
3.
KP-E switch must be used only with reliable means of limiting the voltage and current to prevent sparks between the contact
surfaces. The equipment to be used for electrical load limiting must always be approved for use in the zone concerned.
4.
Cable and cable entries approved for the application must be used. Cables must not be in contact with sharp edges. The cable
must be connected with adequate stress relief in order to prevent that pulling forces can be carried through the cable to the
terminal.
5.
In the event of pressure pulsations in the system, where the switch is connected, these must be effectively damped to prevent
fatigue failure on the bellows. The cycle frequency of the KP-E switch must be kept as low as possible. The vibration level must be
kept as low as possible.
6.
It is recommended to regularly check the function of the KP-E switch.
7.
Only apparatus designed, constructed and released by Danfoss must be used for application concerned. Danfoss can accept no
responsibility in case of alterations made on the pressure switches or the use of them against the instructions of Danfoss.
8.
Any overload of the KP-E switch must be prevented. Overloaded or damaged apparatus must be exchanged.
9.
Only authorised persons, who are certified in installing and maintaining refrigration system may do the installation, maintenance
and exchange of the switch.
10.
Use only appropriate tools.
11.
Dispose of the switch in an environmentally-friendly way.
12.
KP-E switches must be installed in area where is low risk of mechanical damage.
13.
Components within the equipment can exceed the enclosure temperature by 1K (1 °C). When the media temperature exceeds
80 °C, it is the responsibility of the user to ensure that the media temperature does not cause a thermal ignition risk on parts
between the media and the switch enclosure thus it is recommended that maximum media temperature on pressure switch is
limited to 80 °C.
14.
Isolation of the intrinsically safe circuit to ground and to the contact mounting screw has been verified through 500VACrms
dielectric strength testing, carried out in accordance with IEC EN 60079-11:2012.
15.
The max. applicable length of the cable connected to the KP-E depends on cable capacity and inductivity.
Capacitance and inductivity of the cable together with Ci and Li of KP-E must fit requirements of applied zener barrier.
Safety requirements
