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General diagram YLCA 20 ÷ 27 and YLHA 5 ÷ 27
A B C D
F
G
H
I
E
A
Four-way valve
B2
Water outlet temperature probe (Antifreeze pro‐
tection)
B
Pump
B3
Outdoor temperature probe (Dynamic set point)
C
Heater
B4
Ratiometric pressure probe (fan speed and defrost
control)
D
Compressor 1
ID1
Water flow switch
E
Alarm
ID2
Remote COOL / HEAT
F
230 / 24 transformer
ID3
High pressure switch
G
Fan speed control
ID4
Low pressure switch
H
Communication
ID5
Remote ON / OFF
I
Programmable key
N
Neutral
B1
Water inlet temperature probe (Control set point)
L
Phase
1
User manual
1.2
Operating instructions µC2
10
Summary of Contents for YLCA
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