Data Sheet for Product

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Siemens Superheat Controller CE1N3372en_02
Smart Infrastrucutre 2022-02-16
When starting up the controller for the first time, the configuration mode appears.
First, the correct type of refrigerant and the units must be selected. The types of
refrigerant that can be selected are:
R22
R23
R32
R125
R1234yf
1)
R1234ze
2)
R134a
R152a
R170 *
R227ea
3)
R236fa
4)
R245fa
5)
R290 *
R401A
R401B
R401C
R402A
R402B
R404A
R406A
R407A
R407B
R407C
R407F
R408A
R409A
R410A
R410B
R413A
R417A
R421A
R422A
R422D
R427A
R434A
R437A
R438A
R444B
R447B
R448A
R449A
R450A
R452B
R454B
R502
R507
R513A
R600 *
R600a *
R717 **
R723
R744
R1270 *
1) Displayed as R12YF
2) Displayed as R12ZE
3) Displayed as R227E
4) Displayed as R236F
5) Displayed as R245F
* Hydrocarbons: Can only be used for explosion-proof valves!
** R717 (NH3): Requires the use of valves suited for ammonia, e.g. MVS661.25-…
If the wrong type of refrigerant is selected, the plant can be damaged!
The temperature can be displayed in °C (K) or °F , and the pressure in Bar or Psi.
Configurable are (also refer to pages 3 and 4):
• Default: simple superheat control
• External capacity control
• Internal capacity control
• Two superheat circuits, if circuit 2 is enabled.
Refer to page 11 (Parameter mode / Parameter list)
Before switching the refrigeration plant on, the peripheral devices should be
checked:
• Temperature and pressure sensors
The suction gas temperature TOH, the evaporation pressure P0, the evaporation
temperature TO and in accordance with the configuration, the medium tempera-
ture TM are displayed in the control mode.
• Electronic injection valve
In the simulation mode, the degree of opening (MAN EIV) of the electronic injec-
tion valve can be preset. Also, it is possible to check whether the valve's actual
position (EIV) agrees with the manually preset position (MAN EIV)
• When the wiring of the plant and all peripheral devices are in order, the plant can
be switched on.
The factory-set parameters for superheat control (XP,TN and D), the MOP function
and the capacity control (XP and TN) are values gained from practical experience.
The Installation and User Manual contains detailed information about how the con-
troller can be fine-tuned to achieve optimum performance.
Selection of
refrigerant
Important
Selection of units
Selection of
application
Icing
Checking the
peripheral devices