Technical information

General diagram, (YLCA / YLHA 100,120 and 150)
A Keyboard ‑ display terminal U Water outlet
B Programme download key V Water inlet
D/J/C/I Comp. 1/ Comp. 2 / Comp. 3 / Comp. 4 X Fan protection 12
E/H Pump 1/ Pump 2
Y/A1/G1/
I1
Protection comp. 1 / Protection comp. 2 / Protec‐
tion comp. 3 / Protection comp. 4
K RS485 serial connection Z/H1 HP1 / HP2 (High-pressure switch)
L Phase (board power supply) C1 Fan 3.4
M General protection D1 Fan 1.2
N Neutral (board power supply) F1 Fan protection 3.4
O Remote ON / OFF J1 Remote COOL / HEAT
P2/B1 LP1 / LP2 (Low-pressure switch) K1 4-way valve, circuit 1
Q/E1 Pump 1 protection / Pump 2 protection M1 4-way valve, circuit 2
R Flow switch O1 Antifreeze heater
S/T Circuit 1 pressure sensor / Circuit 2 pressure sensor P1 Back-up heater
1 Technical Information
1.13 Operating instructions
106