BALTIC R410A-IOM-0708-E Page 94
WIRING CONNECTIONS
Important Warning
Any wiring modification on the CLIMATIC 50 must be done by Lennox technician or employees
having valid electrical qualification and authorisation.
For any modification of wiring on the 24V supply or on 4-20mA sensor, check the polarity prior to apply the power.
Wrong polarity may cause serious damage and destroy the Plan network. Lennox will not accept liability for damage
caused by wrong power connection or any wiring modification done by people without valid training and
qualifications.
Any external connection with the unit, using 24Vac voltage should not exceed a length of more than 30m. It concerns
external contacts connected to Climatic™50 logical inputs or humidifier control connection to the output 0-10v.
Over 30 m, the installer must interface this information with relays or converters.
In any case, the 24Vac control voltage must not be used to drive external function with Climatic™50 logical output
WARNING: Separate as much as possible probes, displays, logical input cables from power
cables with strong inductive load, in order to avoid possible electromagnetic perturbations
Connection
Sensors and Probes
External sensors or probes connection must be carried out with the following cable:
Cable length up to 20m: AWG22 (0.34 mm ²), 1 pair crossed with screen (2 pairs for CO2 sensor).
Cable length up to 50m: LiYCY-P (0.34 mm ²), 1 pair with general shield. (2 pairs for CO2 sensor).
The cable length should not exceed 50m.
For a better electromagnetic protection, Lennox recommends the use of LiYCY-P cable
Room Temperature Probe (NTC)
The room temperature probe (- BT10) is connected to the Climatic™ main board BM50 50 entry B7 connector J6 (refer to
the unit electrical wiring diagram).
Room Humidity Sensor (0-20mA / Option)
The room humidity sensor (- BH10) is connected to the Climatic™ extension board BE50 entry B1 connector J9 (refer to the
unit electrical wiring diagram).
Room Air Quality Sensor CO² (4-20mA / Option)
The room air quality sensor (-BG10) is connected to Climatic™ main board BM50 entry B2 connector (refer to the unit
electrical wiring diagram).
DS 50 Display
The Display DS50 can be connected to the Climatic™ either on one of the RJ12 connectors located on the board DT50, or
directly on the main board BM50 connector J10.
Connection is carried out by the flat 1.5m cable delivered with this DS50.
In any the case, Display DS50 cannot be remotely connected.
In case of Master/Slave installation, one, and only one, display DS50 must be connected on the pLan bus.
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