York VCH-20A, User Manual

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1.5 Operating instructions
A thermostat is used for starting and managing the air conditioning unit and for adjusting the temperature
of the supply air.
Through this thermostat, the operating programme determines when to automatically start the air
conditioning unit. The performance of the different unit components is also determined by the operating
programme.
See the documents on the DPC-1 programmable digital thermostat with communication or the documents
on the thermostat installed with the unit for further details on the start-up and adjustment mechanism.
1.5.1 Thermostat connections to the control board
A. Thermostat connection board.
Board connection terminals
X1 To terminal X1 of the DPC-1 thermostat.
B White. To terminal B of the DPC-1 thermostat.
R Red. To terminal R of the DPC-1 thermostat.
Y1 –
O/B –
Y2 –
1.5.2 Thermostat connections
1. Yellow cable.
2. Red cable.
3. White cable.
A. Shielded cable, 2 x 0,5 mm
2
. Maximum length:
100 m.
B. Shielded cable, 10 x 0.22 mm
2
. Maximum
length: 100 m.
A
DS1 RS1
AL RS3 RS2 RS1 X2 X1 W O/B Y2 Y1 G BL R
A B
1
2
3
User manual 1
Operating instructions 1.5
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