General Diagram - York YLHA 50 User Manual

1.2.1 General diagram

2
A1 µchiller
2
A2 µchiller (expansion)
A Four-way valve
B Pump
C Heater
D / K Compressor 1 / Compressor 2
E Alarm
F 230 / 24 transformer
G Fan speed control
H Communication
I Programmable key
J Transformer connection
Operating instructions µC2 (YLHA 50, 60 and 80)
N Neutral
L Phase
B1 Water inlet temperature sensor (Control set point)
Water outlet temperature sensor (Antifreeze pro‐
B2
tection)
B3 Outdoor temperature sensor (Dynamic set point)
Radiometric pressure sensor (Fan speed and de‐
B4, B8
frost control)
ID1 Remote COOL / HEAT Water flow control
ID2 Fan heat switches
ID3, ID8 High-pressure switch
ID4, ID9 Low-pressure switch
ID5 Remote ON / OFF
ID7 Flow switch
ID10 General protection
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