Wiring Connections - Lennox CLIMATIC 50 User Manual

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 on logical inputs. 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.
o
Cable length up to 50m: LiYCY-P (0.34 mm ²), 1 pair with general shield.
o
 The cable length should not exceed 50m.
 For a better electromagnetic protection, Lennox recommends the use of LiYCY-P cable.
DISPLAY DS50
 The Display DS50 can be connected to the Climatic™50 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.
DISPLAY DC50 (Remote CONNECTION)
Warning: A wrong wiring of the display immediately damage it and/or the main board BM50.
 The optional DC50 is designed to be mounted on the wall.
 Fit the cable from the DT50 board through the back piece
 Fasten the back piece to the wall using the rounded head screws supplied in the packaging
 Connect the cable from the main board on the connector on the back of the DC50 display
 Fasten the front panel on the back piece using the flush head screws supplied
 Finally fit the click-on frame
CLIMATIC™50 – Chiller / Heat Pump – Customer version
CL50-CHILLER-IOM_CUST-0808-E
Page 4