Water Connections; Refrigerant Connections; Pump Speed Selection; Power Wiring Diagram - CIAT YUNA II series Installationsanleitung

5.4 - Water Connections

Refer to the Safety Information Manual.
s .O NEED TO USE A COUNTER SPANNER WHEN TIGHTENING
hydronic connections to the module.
s 5SE ONLY WATER MIXED WITH ANY WATER TREATMENT
product to avoid bacteria and dirt proliferation in the
circuit.
s 0LACE VALVES NOT INCLUDED AT THE INLET AND OUTLET OF THE
hydronic module.
s 5SE PIPE OF Ñ OR BIGGER FOR CONNECTIONS BETWEEN THE
hydronic module and terminal.
s 7RAP THE CONNECTIONS WITH THE ANTI CONDENSATE
INSULATION AND TIGHTEN WITH TAPE WITHOUT EXERTING
excessive pressure on the insulation.
s 3TART THE WATER lLLING WHEN ALL THE INSTALLATION
connections are complete.
Maximum distance between 3-way valve and hydronic
module: 3 m.
Maximum distance between domestic hot water tank and
hydronic module: 10 m

5.5 - Refrigerant Connections

Refer to the Safety Information Manual.
&OR PIPING LENGTHS REFER TO THE /UTDOOR UNIT MANUAL

5.6 - Pump Speed Selection

The pump provided with the module is a
circulator. The installer selects the speed of the module
PUMP TO GUARANTEE THE TARGET mOW RATE – 
SPACE HEATINGCOOLING LOOP KNOWING THE AVAILABLE PRESSURE
OF THE SYSTEM AT DIFFERENT PUMP SPEED SEE
15) and the pressure drop of the installation.
Make sure that the pressure drop in the domestic hot
WATER LOOP IS NOT TOO LOW )F NEEDED INSTALL A VALVE TO
MODULATE THE PRESSURE DROP IN THIS LOOP INLETOUTLET
TEMPERATURE DIFFERENCE SHOULD BE   ›#
For the models YUNA II 12-156 D
sheet.
ѼÊÇÆÁ» YUNA II 5-63 D
ǼÍĽ
CDU YUNA II YUNA II
5HK 6 HK
Nominal 5.0 6.5
Capacity
[kW]
Nominal 5 5
DT [° C]
Nominal 860 1118
Flow Rate
ÄÌ À
28
variable speed
IN THE
lG   AND
refer to the attached
YUNA II 9-113 D YUNA II 12-156 D
YUNA II YUNA II YUNA II YUNA II
9HK 11HK 12 HTK 15 HTK
9.0 11.5 12.0 15.0
5 5 5 5
1548 1978 2064 2580
The operating red knob allows to set several pressure
levels in 2 control modes :
6ARIABLE DIFFERENTIAL PRESSURE Δp-v)
s
#ONSTANT DIFFERENTIAL PRESSURE Δp-c)
s
6ARIABLE DIFFERENTIAL PRESSURE Δp-v)
#ONSTANT DIFFERENTIAL PRESSURE Δp-c)
Venting function
-IN mOW   -AX mOW 
"Set Up" procedure :
&ACTORY PRE SETTING Δp-c 8
!LL FUNCTIONS CAN BE SET ACTIVATED OR DEACTIVATED BY USING
the operating red knob :
the control mode Δp-v is set on the left of the middle
s
POSITION FROM  TO  
the control mode Δp-c is set on the right of the middle
s
POSITION FROM  TO  
s FOR VENTING THE PUMP TURN THE KNOB IN ITS MIDDLE
POSITION THE VENTING FUNCTION IS ACTIVATED AFTER  SECONDS
and lasts 10 minutes before going to
Δp-c max mode).
Note :
4HE VARIABLE PRESSURE MODE Δp-v) is recommended in
heating systems with radiators.
4HE CONSTANT PRESSURE MODE Δp-c) is recommended for
UNDERmOOR HEATING CIRCUITS
!LL HYDRONIC CURVES HAVE BEEN DElNED IN CONSTANT
PRESSURE MODE FOR MIN MEDIUM AND MAX SPEED

5.7 - Power Wiring Diagram

Refer to the Safety Information Manual and to the
electrical scheme supplied with the unit.
Electrical installation must be according to
Description YUNA II 5-63 D
A Power supply 1pH - 230V
B Electrical 2 poles 20 A
heater breaker
½Ä¼ ËÍÈÈÄÁ½¼
C Outdoor unit 2 poles, 16 A
ºÊ½¹Ã½Ê ½Ä¼
supplied)
D Booster heater 2 poles, 16 A
ºÊ½¹Ã½Ê ½Ä¼
supplied)*
lG .
YUNA II 9-113 D YUNA II 12-156 D
1pH - 230V 3 Ph +N+ 400 V
2 poles 20 A 4 poles 16 A
2 poles, 25 A 4 poles, 25 A
2 poles, 16 A 2 poles, 16 A