Installation guide
089
Pressure switch
MP 55E
Refrigerants:
R1270, R290, R600, R600a
06 0R 9517
For complete list of approved refrigerants, visit www.products.danfoss.com
and search for individual code numbers, where refrigerants are listed as part of
technical data.
This product is validated in accordance to EN 60079-0:2012 + A11:2013.
Ignition risk is evaluated in accordance to EN 60079-11:2012.
See safety requirements at the end of instruction.
06 0R 9517
Typ e
Operation range
LP
PS/MWP P
[bar]
MP 55E -1 – 12 17 22
Імпортер:ТОВ з іі "Данфосс ТОВ" 04080, Київ 80, п/с 168, Україна
© Danfoss | Climate Solutions | 2022.01 AN213786434535en-000403 | 1
test
Info for UK customers only: Danfoss Ltd., 22 Wycombe End, HP9 1NB, GB
Max. 80 °C
176 °F
15% Ag
Electrical connection
The MP-E pressure switch placed in explosive
zone must always be wired through reliable Ex
zener barrier, placed outside ex-zone, to ensure
insufficient energy supply to cause the ignition of
surrounding atmosphere by an electrical spark or
Cables and cable entries approved for the
application must be used and can not be in contact
with sharp edges. Cables must be connected with
adequate stress relief that way that pulling forces
can not be carried throug the cable to the terminal.
the heating of components of circuitry.
Note:
The equipment to be used for electrical load
limiting must always be approved for use in the
A particular system can be classified in different
zones, for different parts of the system.ed
zone concerned.
Intrinsic safety protection method
EX - zone Non EX - zone
EX certified
Zenner
barrier
Signal
Electrical data for
intrinsically safe specification
(for all MP-E types):
Pi max: 1 W
Ui max: 30 V
Ii max: 0.1 A
Ci max: 0.5 nF
Li max: 0.2 µH
Must be used with certified Ex ic barrier (product matching) satisfying the
input parameters.
Product marking
II3G
Ex ic IIB T6Gc
© Danfoss | Climate Solutions | 2022.012 | AN213786434535en-000403
Safety requirements
1.
The MP-E can be applied on systems with R1270 (propylene), R290 (propane), R600 (butane),
R600a (isobutane) 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. MP-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 MP-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 MP-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 MP-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. Components within the equipment can exceed the enclosure temperature by 1 K (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.
13. Isolation of the intrinsically safe circuit to ground and to the contact mounting screw has been
verified through 500 VACrms dielectric strength testing, carried out in accordance with
E N 6 0079 -11: 2012.
14. The max. applicable length of the cable connected to the MP-E depends on cable capacity and
inductivity. Capacitance and inductivity of the cable together with Ci and Li of MP-E must fit
requirements of applied zener barrier.
© Danfoss | Climate Solutions | 2022.01 AN213786434535en-000403 | 3
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