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Code +030220215- rel. 1.4 – 25.04.2007-

Observe the following warnings:

• do not let water or other foreign bodies/fluids inside the valve:

this would make it impossible to completely clean the parts inside;

• preferably use the side fitting on the valve for the refrigerant inlet;

• do not install the valve with the stator facing downwards;

• install a mechanical filter immediately upstream of the valve;

• preferably install a sight glass upstream of the valve, so as to be able to check correct flow during operation;

• remove the stator from the valve body during the assembly;

• for welded connections, wrap the valve body in a wet rag before starting welding;

• never point the flame directly at the valve body;

• never exert twisting or deforming forces on the valve body or on the pipes connected to it;

• do not exert excessive pressure on the stator when fitting it to the valve so as to avoid deforming the plastic

cap at the bottom of the stator;

• do not hit the valve with hammers or other tools, nor drop the valve;

• never place the valve near magnets and/or magnetic fields;

• take extreme care to ensure no impurities enter the refrigerant circuit;

• do not install or use the valve if there is deformation or damage to the visible parts (outer cap and

connection pipes);

• do not install following strong impact, for example after dropping the valve;

• do not install or use if the stator (winding), contact carrier or connector are damaged.

3. Positioning the probes

The purpose of the control action of the electronic valve is to maintain the refrigerant superheat at the evaporator

outlet around the desired value (superheat set point). In general, if the superheat is greater than the set point, the

controller will open the valve, and vice-versa.

To measure the superheat, the driver uses 2 probes that measure the suction temperature and the evaporation

pressure of the refrigerant at the evaporator outlet.

The pressure is used to calculate the saturated evaporation temperature, and the difference between the suction

temperature and the saturated evaporation temperature gives the superheat.

3.1 Ideal position of the probes

The ideal position for both probes is immediately at the evaporator outlet, so as to be able to measure the effective

refrigerant superheat.

Fig. 3.a

Fig. 2.g

installation

Carel E2V S0 Series User Manual

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