Code +030220811- rel. 1.0 – 26.04.2007
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In air-conditioners/above-zero chillers, where better measurement precision and a faster response is required, the
NTC***WF** probe should be used, with installation in a socket.
Good thermal coupling must be guaranteed between the socket and the probe, applying abundant conductive paste
inside the socket. The inside diameter of the socket must a little larger (no more than 0.5 mm) than the diameter of
the probe. The probe + socket assembly should then be covered with heat insulation.
NOTE: avoid using a socket for below-zero showcases or cold rooms where ice frequently forms on the pipe, and
may damage the socket.
4.2 Evaporation pressure transducer
The pressure transducer must be installed near the temperature probe on the top of the pipe. It can be positioned
away from the point of temperature measurement only if the section of pipe that separates the two probes does not
contain devices that alter the pressure (heat exchangers, flow indicators, valves, etc.).
Depending on the type of controller, two types of pressure transducer can be used, which differ as regards the
output signal:
0.5-4.5 V ratiometric type SPKT****R0 per Evd400, MasterCase 1 and 2, mpxPRO
4-20mA type SPKT****C0 for Evd200-300, MasterCase 2, mpxPRO
Fi
. 4.h
Fig. 4.j
Fig. 4.i
installation
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