Sensors and probes
Pressure sensors (B3 and B4)
One for each cooling circuit and connector to the coil collectors. They provide information to the system
for fan speed adjustment in the summer and winter cycles, management of defrosts in the heat pumps,
prevent and lockout functions of the system by excessively high pressure.
NTC probes (B5 and B6)
• B5- For the detection and control of water inlet temperature (cool only and heat pump units).
• B6- For the detection of water outlet temperature. It provides information for antifreeze protection and
control of the antifreeze and backup heaters. If required, allows controlling water temperature at the
heat exchanger discharge
User manual
1
General description of the unit 1.1
9
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