York Ylca 12, Руководство по установке

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1.9.3 Hydraulic connections
The hydraulic connections of the water inlet and outlet of the unit should be carried out respecting the
inlet and outlet directions indicated.
Galvanised iron or copper piping can be used, with dimensions no lower than those indicated, and keep‐
ing in mind the pressure drops at said connections and in the internal exchanger of the installation.
Pump dimensioning should be carried out in accordance with a nominal flow rate that allows an Ģt within
the operating limits.
During the winter season, with outdoor temperatures below 0 °C, take precautions to avoid freezing of
the water in the pipes.
Usually, a filling solution is applied to the circuit with an antifreeze mixture (glycol).
1.9.4 Wiring diagrams
Electrical installation YLCA / YLHA PLUS 5 to 27
A YLCA terminal strip b
Flow Switch (only in
units without hydraulic
group)
B Outdoor terminal strip c
General alarm (voltage-
free inverter contact
max. 2A resist. A 230
Vac)
C Main switch d
Remote ON / OFF
switch
a1
Supply (200 ‑ 1+ N ‑ ph
‑ 50 Hz)
(Single-phase units)
e
Remote COOL / HEAT
switch
CLOSED = COOL
OPEN = HEAT
(YLHA units only)
a3
Supply (400 ‑ 3 + N ‑
ph ‑ 50 Hz)
(Three-phase units)
f Auxiliary heater
□
Terminal strips
YLCA / YLHA PLUS
◊
Voltage-free terminal strip contact
YLCA / YLHA PLUS
Ø Outdoor unit terminals - ‑ ‑ Client's electrical installation
○ 230 Vac terminal
C A U T I O N
The cable used for the unit power supply must be H05 RN ‑ F
A
B
C
a1
a3
b
c
d
e
f
1 Installation manual
1.9 Instructions for installation and connection of the unit
32