GeoSmart NETZERO BW Manuel D'installation page 24

Analogue inputs (AIxx)
These terminals are used to connect external temperature probes. Only passive NTC temperature probes can be connected, so cable
connection polarity is not important.
If necessary, use extension cables with a maximum length of 50 m and a minimum diameter of 0,75 mm
120 m) it is recommended to use cable with a section of 1.5 mm
▪
Use original temperature probes only; other types of components could cause poor heat pump
operation and/or cause heat pump component breakdowns.
NOTE
NTC
Digital control inputs (DIxx)
Digital signals from thermostats or other external devices can be connected to these terminals to control heat pump production
functions.
▪
Take special care with the working voltage of each digital input; improper handling could cause poor
heat pump operation and/or heat pump component breakdowns. Some digital inputs require voltage-
NOTE
free signals, while others require 24Vac signals, 24Vac are powered by the terminal block connection.
▪
Do not combine free signal with 24Vac signal.
▪
Heat pump provides 24Vac connection from the electrical panel, all the devices connected to the heat
pump cannot exceed 36VA or 1.5A. Exceed these limits could cause poor heat pump operation and/or
NOTE
heat pump component breakdowns.
GEOSMART ENERGY
2
.
Com
Sgn
Figure 5.3. Example of temperature probe connections.
Com
Sgn
Figure 5.4. Example of voltage-free digital input connections.
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Installer manual NETZERO
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. For greater lengths (up to