Emotron EMX-R Series, Инструкция по эксплуатации, Страница: 24 / 169

Emotron AB 01-3333-01r3 Mounting/connection 19
respectively. The DIP switches on all control units are set as described in
“Setting DIP switches”.
2.2.10 Heat recovery on cooling – summer/winter switch
Heat recovery on cooling refers to the mode of operation when the incoming air
temperature exceeds the exhaust air temperature. By driving the rotary heat
exchanger at maximum speed, a cooling effect is achieved on the incoming air.
The heat recovery on cooling function is most simply obtained by using an
external regulator which has this function built-in. EMX-R is then controlled
by a control signal, e.g. 0–10 V.
If for example, an external regulator is already installed, you can obtain the heat
recovery on cooling function by directly connecting a separate differential
thermostat to EMX-R, terminals 36–37
Model E has a built-in differential thermostat. This makes it possible to connect
two NTC sensors of resistance 2000 Ohm (for example EGL 511), one in the
incoming air duct and one in the exhaust air duct, directly to EMX-R, terminals
51–53. If the exhaust air is colder than the incoming air, the rotor rotates at its
maximum speed, and cooling is recovered. If the exhaust air is warmer than the
incoming air (as is normally the case) the speed is controlled by the control
signal, and heat is recovered.
2.2.11 Analogue output signal (only available on Model E)
The output signal, 0–20 mA or 0–10 V, is proportional to the speed of the
motor. Maximum value, 20 mA or 10 V, is always obtained at the selected max.
speed (60, 80 or 100% of the motor’s maximum rpm). The choice between the
0–20 mA output signal and the 0–10 V output signal is made with jumper J1
positioned behind the control terminals 51–58.
2.2.12 Potentiometer with low resistance, 100 Ohm to 5
kOhm (only available on Model E)
When control is provided by an external potentiometer with a total resistance
value between 100 Ohm and 5 kOhm, the three leads are connected to
terminals 56–58. DIP switches 1–3 are set in the same way as for a control
signal of 0–10 V.