York YLCD Series User Manual page 29

General diagram YLHD 40 and 70
A1
B1
B2
B3
F
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 control
H Communication
I Programmable key
J Transformer connection
A B C D
G
Operating instructions
E
A2
I
J
H
N Neutral
L Phase
B1 Water inlet temperature probe (Control set point)
Water outlet temperature probe (Antifreeze pro‐
B2
tection)
B3 Outdoor temperature probe (Dynamic set point)
Ratiometric pressure probe (Fan speed and de‐
B4
frost control)
ID1 General stop
ID2 Water flow switch
ID3, ID8 High-pressure switch
ID4, ID9 Low-pressure switch
ID5 Remote ON / OFF
ID6 Remote COOL / HEAT
ID10 General protection
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