CIAT Yuna II 5H, Yuna II 9H, Yuna II 11H, Yuna II 12HT, Yuna II 15HT User Manual
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Yuna II
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 15.739 A
air-to-water heat pump
Heating nominal capacity : 4 to 15kW
Cooling nominal capacity : 14 to 16kW
The YUNA II air-to-water split heat pump is designed for
heating applications in new, existing individual homes and
small businesses.
When installed alone, YUNA II is compatible with low to
medium temperature emitters (underfloor heating, fan coil
units, water cassettes, radiators, mixed installations, etc.).
YUNA II is also compatible with high temperature emitters for
boiler backup operation.
Each device is tested in the factory and delivered ready for
operation.
YUNA II's range is composed by 6 single-phase and threephase models.
Operation in cooling mode with an outdoor temperature of
0°C to 46°C (only three-phase units).
Operation in heating mode with an outdoor temperature of
-20°C to +30°C.
If the heat pump is the only source of heat:
Below this temperature, heating must be provided by a
separate heating source or an additional electrical supply.
If the heat pump is used for backup operation:
Operates down to the equilibrium point (temperature below
which the heat pump can no longer keep up with heating
needs). Below this point, the heat pump and boiler run
alternately (heat pump OR boiler).
Low Voltage Directive 2006/95/EC
EMC: ElectroMagnectic Compatibility 2004/108/EC
PED: Pressure Equipment Directive 97/23/EC
WEEE: Waste Electrical & Electronic Equipment 2012/19/EU
RoHS: Restriction of Hazardous Substances Directive 2011/65/UE
Use
Range
ConfoRmity
Simple, reliable
,
efficient split heat pump!
Equipped with
CS controller
*Reversible mode only with three-phase models
410A
60
Cooling or
heating
** except three-phase models
***
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heat pumps - aIR CONDItIONING - ReFRIGeRatION - aIR haNDLING - heat eXChaNGe - Na 15.739 a
air-to-water heat pump
Yuna II
Yuna II air-to-water split system heat pumps with built-in
inverter technology are designed for residential and light
commercial applications. They offer excellent energy efficiency
values, exceptionally quiet operation and meet the most
stringent operating temperature demands.
The units integrate the latest technological innovations: Non-
ozone depleting refrigerant R410A, DC inverter twin-rotary
compressors, low-noise fan and microprocessor control.
With exceptional energy efficiency values, the inverter air-towater split-system heat pumps qualify for local tax reductions
and incentive plans in all the EU countries.
Ecodesign is the European Directive that sets mandatory requirements for Energy related Products (ErP) to improve
their energy efficiency. CIAT supports initiatives to reduce the environmental impact of its products.
Features
■ Wide operating range in both heating and cooling mode
offers high performance in a wide temperature range.
■ DC inverter twin-rotary compressors with Pulse Amplitude
Modulation (PAM) and Pulse Width Modulation (PWM)
provide enhanced reliability, low energy consumption
and smooth vibration-free operation under all operating
conditions.
■ Variable-speed fans with an innovative patented fan blade
shape ensure improved air distribution at exceptionally low
noise levels.
■ Pre-set or customised selection of the appropriate climate
curve for stable output capacity to match the heat load.
■ Output to link and integrate the unit with the existing heat
sources offers a dual-energy approach, increased savings
and optimum comfort in all weather conditions.
■ Able to control two independent comfort zones with a
two-zone kit added to the main comfort module.
■ Leaving water temperature up to 60 °C for radiator and
domestic hot water applications, making hot water readily
available.
Adapted to your needs
■ Heating only or reversible comfort module
■ Backup heating, either electrical (single-energy applications)
or gas boiler (dual-energy applications)
■ Comfort is ensured via the user interface and the possibility
of integrating two leaving water temperature zones.
Advanced technology
■ Electronic system management: Several sensors placed in
key positions in the refrigerant circuit electronically detect
the operational system status. Two micro-controllers receive
the input from the sensors, manage them using advanced
control algorithms and optimise the refrigerant flow and the
functioning of all the core components - the compressor, fan
motors and the pulse modulation valve.
■ The pulse modulation valve, a bi-flow electronic expansion
device, optimises the refrigerant amount in the circuit and the
superheat, and prevents the refrigerant migration back into
the compressor. This device further enhances high system
performance and reliability.
■ The air management system, which consists of a propeller
fan, orifice and an air discharge grille, guarantees minimised
noise levels.
New patented fan blade shape and grille prole with low
pressure drop
Advanced performance
■ Yuna II have an extremely high energy efficiency ratio
in both cooling and heating mode, ensuring significant
energy savings. Large and efficient coils and optimised
circuiting feature ensure that all the combinations meet the
European tax rebate efficiency targets. Efficiency at part-load
conditions (seasonal energy efficiency) reaches the highest
level in the industry.
■ Year-round comfort: The advanced technology used in
Yuna II provides optimised comfort levels for the end
users, both in terms of water temperature control and silent
operation. The desired temperature is quickly reached and
effectively maintained without fluctuations. Yuna II offers
optimised individual comfort levels - both in winter and in
summer.
■ Wide temperature operating range: Yuna II can operate
efficiently in extreme temperature conditions. For end user
comfort the units operate down to -20 °C outdoor temperature
in heating mode, and in the summer, they produce hot water
up to 60 °C at up to 30 °C outside temperature for domestic
hot water applications.
ErP
READY
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Yuna II
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 15.739 A
air-to-water heat pump
Environmental care
■ Non-ozone depleting refrigerant R410A:
- Chlorine-free refrigerant of the HFC group with zero ozone
depletion potential
- High-density refrigerant, therefore less refrigerant required
- Very efficient, therefore gives an increased energy
efficiency ratio (EER)
■ The new packaging ensures high protection during transport
and handling and is 100% recyclable.
Fast and simple installation and service
■ Easy access to all internal components: Unscrew only three
screws to remove the complete front panel to access the
refrigerant piping connections, control box and electrical
connections, as well as the compressor and other key parts.
■ Advanced circuit design and component selection has
resulted in a compact unit with an exceptionally small footprint that is easy to transport through narrow doors.
■ Reduced weight and a handle on the unit panels to facilitate
transport.
■ No additional buffer tank required. This simplies and speeds
up the installation process.
■ 3-bar pressure relief valve as standard
■ 8-litre internal expansion tank
■ High-temperature refrigerant protection
■ Water flow switch to ensure that the circuits contain enough
water to operate correctly.
■ Various power cable outlet options: Pre-punched holes in
the cabinet panels permit cable exit on the side, front or rear.
■ Dealer service tool connection kit includes the software
and connections to monitor the operating parameters from
a personal computer, giving an easy-to-read display with
visual graphs and statistics indicators.
■ Yuna II units are equipped with 1 inch gas MPT water
connections.
■ Yuna II internal module reduces space requirements and
simplifies the installation. Only the power and the water
supply and return piping need to be connected.
■ Condensate drain piping connection
■ Specially shaped anchorage feet ensure correct and safe
fixing of the unit.
■ The programmable thermostat periodically runs system
checks to monitor and assess the unit operating parameters.
If a problem occurs, troubleshooting fault codes and
messages help the service technician to identify the fault.
DC inverter twin-rotary compressor
■ Advanced technology provides maximum energy-efficiency
with high capacity available at peak conditions and optimised
efficiency at low and mid compressor speeds. Yuna II DC
inverter uses Intelligent Power Drive Unit (IPDU) hybrid
inverter technology, combining two electronic management
logics: Pulse Amplitude Modulation (PAM) and Pulse Width
Modulation (PWM) for optimised compressor operation
in all conditions, minimised temperature fluctuations, and
provides perfect individual comfort control with significantly
reduced energy consumption:
- PAM: Pulse Amplitude Modulation of the direct current
controls the compressor at maximum load conditions
(start-up and peak load), and increases the voltage at fixed
frequency. The compressor works at high speed to rapidly
achieve the desired temperature.
- PWM: Pulse Width Modulation of the direct current controls
the compressor at partial load conditions, and adjusts
the frequency at fixed voltage. The compressor speed is
fine-tuned and the system provides high-level comfort (no
temperature fluctuations) at exceptionally efficient working
conditions.
■ Compressor frequency is increased continuously up to
the maximum level. This ensures that there are no current
draw peaks in the start-up phase and safe connection to a
single-phase power supply even in large-capacity systems.
The maximum operating current of Yuna II is below 12 A
(systems up to 6.5 kW) and below 23 A for larger systems
(up to 11.5 kW). Inverter ramp-up speed makes soft starts
unnecessary and ensures immediate maximum power.
■ The two rotary compression cylinders, offset from each
other by 180°, and the DC brushless motor with the shaft in
perfect balance ensure reduced vibration and noise, even
at very low operating speeds. This results in an extremely
wide range between minimum and maximum capacity
with continuous operation, guaranteeing that the system
is always optimised and provides maximum comfort at
exceptionally high efficiency levels.
■ Twin-rotary cylinders, low vibrations and low load to the
shaft ensure highest compressor reliability and a long
trouble-free operating life.
■ All DC brushless twin-rotary compressors are equipped with
crankcase heaters as standard.
■ A double compressor shield for acoustic insulation further
reduces noise levels.
Superior reliability
■ Exceptional endurance tests:
- All the units are tested at various stages on the production
line for circuit leakage, electrical compliance, water and
refrigerant pressures.
- End-of-line test of all unit operating parameters
- Corrosion resistance test
- Accelerated ageing test on critical components and complete
assembled units, simulating thousands of hours of continuous
operation.
- Packaging crash test to ensure that the units are adequately
protected against accidental shocks
- Extensive field and site testing.
Corrosion-resistant casing
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heat pumps - aIR CONDItIONING - ReFRIGeRatION - aIR haNDLING - heat eXChaNGe - Na 15.739 a
air-to-water heat pump
Yuna II
Economical operation
■ Increased energy efficiency at part load:
- The exceptionally high energy efficiency of the Yuna II is the
result of a long qualification and optimisation process.
- Use of ambient air as primary source of energy in domestic
heating applications significantly reduces the overall energy
consumption and minimises CO2 emissions.
- Night mode operation at reduced compressor speed, results
in low-noise operation and a significant reduction in energy
consumption.
- Easy-to-set and economical silent mode, reduces the
compressor speed.
- R-410A refrigerant is easier to use than other refrigerant
blends.
GMC board
■ The new GMC controller is specifically developed for
Yuna II, and incorporates new control algorithms. It features
customised or pre-defined climate curves, domestic hot
water control, a night-time noise reduction function, a
defrost/alarm output signal, an external heat source, a pump
block prevention function, freeze protection and compressor
operation management.
New user interface
■ Yuna II has an easy-to-use user interface with easy-to-
read LCD screen. It provides enhanced control capability
for maximised performance, reliability and indoor comfort
and has extended programming features such as weekly
scheduling. The sleek contemporary design blends in with
any room decor.
New comfort module
■ With its enhanced aesthetics and compactness, combined
with features and options, Yuna II sets new standards in
energy savings and comfort. Using the two-zone kit, two
separate terminal units or two independent comfort zones
can be closely monitored. Domestic hot water production is
made easy and can be interfaced with solar thermal panels.
Two-zone kit
■ The new design facilitates the installation process and makes
two independent comfort zones, which are easy to control.
This kit includes a hydronic disconnection collector, the
necessary circulating pumps and modulating valve. Installed
together with the domestic hot water tank, the two-zone kit
can integrate all accessories, such as the diverting valve and
T-connection.
DesCRiption oUtDooR anD inDooR Units
Outdoor unit Indoor unit
Yuna II 5H 5 kW nominal capacity
Heating only, 1 zone, max. heating capacity 6.5 kW with 3 kW 1-ph electric heater backup
Yuna II 6H 6.5 kW nominal capacity
Yuna II 9H 9 kW nominal capacity
Heating only, 1 zone, max. heating capacity 11.5 kW with 3 kW 1-ph electric heater backup
Yuna II 11H 11.5 kW nominal capacity
Yuna II 12HT 12 kW nominal capacity
Heating and cooling, 1 zone, max. heating capacity 15 kW with 6 kW 3-ph electric heater backup
Yuna II 15HT 15 kW nominal capacity
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Yuna II
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 15.739 A
air-to-water heat pump
physiCal Data, oUtDooR anD inDooR Units
Outdoor unit (heat pump) 5HK 6HK 9HK 11HK 12HTK 15HTK
Indoor unit (confort module) 5-63D 5-63D 9-113D 9-113D 12-156D 12-156D
Cooling
Full load performances*
C1 Nominal capacity kW 3.57 4.73 5.95 6.8 10.3 12.6
C1 EER kW / kW 2.6 2.6 3.07 2.88 3.41 3.17
C1 Eurovent class cooling D D B C A A
C2 Nominal capacity kW 5.1 6.55 7.88 9 13.5 15.79
C2 EER kW / kW 3.4 3.4 4.05 3.8 4.74 4.24
C2 Eurovent class cooling - - - - - -
Seasonal efciency** ESEER kW / kW
3.71 3.71 4.45 4.37 4.56 4.79
Heating
Full load performances*
H1 Nominal capacity kW 5.01 6.55 9.27 11.5 12 15.01
H1 COP 4.15 4.15 4.48 4.1 4.65 4.3
H2 Nominal capacity kW 4.37 5.7 8.7 11.3 11.2 14.02
H2 COP 3.42 3.34 3.45 3.32 3.7 3.4
H3 Nominal capacity kW 4.25 5.52 7.86 10.95 11.48 11.91
H3 COP
2.65 2.86 2.9 2.79 3.12 3.1
Seasonal efciency**
H1 SCOP
3.1 3 3.2 3.19 3.82 3.67
H1 ŋ
s
% 121 117 125 125 150 144
H1 P
rated
kW 2.34 2.52 8.83 10.09 9.89 11.00
H1 Energy efciency class A A+ A+ A+ A++ A+
H3 SCOP 3 2.98 2.99 2.94 3.45 3.29
H3 ŋ
s
% 117 11 6 11 7 115 135 128
H3 P
rated
kW 1.90 2.16 7.60 8.75 8.37 9.38
H3 Energy efciency class
A+ A+ A+ A+ A++ A++
Indoor unit
Sound levels
Sound power level
(*)
(H3) dB(A) 49 49 49 49 49 49
Dimension, H x L x D mm 800 x 450 x 320 800 x 450 x 320 800 x 450 x 320 800 x 450 x 320 800 x 450 x 320 800 x 450 x 320
Operating weight
(3)
kg 48 48 50 50 52 52
Pump Variable speed circulator
Expansion tank volume l 8 8 8 8 8 8
Availabale static pressure (C1) kPa 70 68 68 65 55 41
Availabale static pressure (H1) kPa 66 60 54 40 45 25
Availabale static pressure (H2) kPa 68 64 57 41 50 31
Max. water-side operating pressure kPa 300 300 300 300 300 300
Water connections
Diameter inch 1 M 1 M 1 M 1 M 1 M 1 M
Outside tube diameter mm 25.4 M 25.4 M 25.4 M 25.4 M 25.4 M 25.4 M
Connections, Liquid / Gas side inch 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8
Chassis paint colour White
Outdoor unit
Sound levels
Sound power level
(*)
(H3) dB(A) 64 67 68 69 69 69
Sound power level
(1)
(C1) dB(A) 68 68
Dimension, H x L x D mm 690 x 900 x 320 820 x 900 x 320 1360 x 900 x 3201360 x 900 x 3201360 x 900 x 320 1360 x 900 x 320
Operating weight
(3)
kg 49 51 88 88 100 100
Refrigerant R410A
Circuit charge
(3)
kg 1.17 1.36 2.1 2.1 3.9 3.9
CO
2
eq. 2.4 2.8 4.4 4.4 8.1 8.1
Compressors DC Inverter Twin-Rotary
Fans Variable speed 3 blades fan
Quantity 1 1 2 2 2 2
Air ow m3/h 2620 2820 5970 6360 5770 5770
Maximum connection pipe length m 50 30 70 70 70 70
Maximum height difference Out/In - In/Out m 30 - 15 30 - 15 30 - 15 30 - 15 30 - 15 30 - 15
Precharged length m 20 20 20 30 30 30
Connections, Liquid / Gas side inch 1/4 - 1/2 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8
Chassis paint colour Beige
* In accordance with standard EN14511-3:2013
** In accordance with standard EN14825:2013, average climate
C1 Cooling mode conditions: evaporator water entering/leaving temperature
12°C/7°C, outside air temperature 35°C, evaporator fooling factor 0 m² K/W
C2 Cooling mode conditions: evaporator water entering/leaving temperature
23°C/18°C, outside air temperature 35°C, evaporator fooling factor 0 m² K/W
H1 Heating mode conditions: Water heat exchanger water entering/leaving
temperature 30°C/35°C, fouling factor 0 m2 K/W. Outside air temperature 7°C
db/6°C wb,
H2 Heating mode conditions: Water heat exchanger water entering/leaving
temperature 40°C/45°C, fouling factor 0 m2 K/W. Outside air temperature 7°C
db/6°C wb,
H3 Heating mode conditions: Water heat exchanger water entering/leaving
temperature 47°C/55°C, fouling factor 0 m2 K/W. Outside air temperature 7°C
db/6°C wb,
(1) In dB ref=10-12 W, (A) weighting. Declared dualnumber noise emission values in
accordance with ISO 4871 (with an associated uncertainty of +/-3dB(A)).
Measured in accordance with ISO 9614-1.
(3) Weights are guideline only. Refer to the unit nameplate.
Eurovent certified values
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heat pumps - aIR CONDItIONING - ReFRIGeRatION - aIR haNDLING - heat eXChaNGe - Na 15.739 a
air-to-water heat pump
Yuna II
eleCtRiCal Data, oUtDooR anD inDooR Units
soUnD levels, oUtDooR Units
soUnD levels, inDooR Units
Outdoor unit 5HK 6HK 9HK 11HK 12HTK 15HTK
Power supply V-ph-Hz
230-1-50 230-1-50 230-1-50 230-1-50 400-3+N-50 400-3+N-50
Voltage range V-ph-Hz 198-264 198-264 198-264 198-264 400-3N-50 400-3N-50
Full load current A 12 12 23 23 15.4 15.4
Fuse rating* A 16 16 25 25 16 16
Operating current A 5.3 6.91 9.43 12.22 6.45 8.72
Power consumption W 1220 1590 2170 2810 2580 3490
Main power wire size mm² 2.5 2.5 4 4 2.5 2.5
Power factor %
0.95 0.95 0.95 0.95 0.95 0.95
Indoor unit 5-63D 9-113D 12-156D
Power supply V-ph-Hz 230-1-50 230-1-50 400-3+N-50
Voltage range V-ph-Hz 207-253 207-253 376-424
Power input kW 3 3 6
Operating current
L1 A 13.0 13.0 8.7
L2 A - - 8.7
L3 A - - 8.7
N A 13.0 13.0 -
Power factor % 1 1 1
Indoor unit power supply and
communication cable - H07 RN-F
mm
2
2G x 1 2G x 1 2G x 1
Backup heater power supply cable
- H07 RN-F
mm
2
3G x 4 3G x 4 5G x 2.5
User interface cable (additional or
remote) - FROH2R
mm
2
4 x 0.75 4 x 0.75 4 x 0.75
Booster heater power supply cable
- H05VV-F
mm
2
3G x 2.5 3G x 2.5 3G x 2.5
DHW booster heater activation
cable - FROH2R
mm
2
2 x 1 2 x 1 2 x 1
DHW hot water sensor cable FROH2R
mm
2
2 x 0.5 2 x 0.5 2 x 0.5
Remote outdoor sensor cable FROH2R
mm
2
2 x 0.5 2 x 0.5 2 x 0.5
* Time delay fuse
* Measured at 2 m distance, in accordance with UNI EN ISO 3741.
Cooling mode
Outdoor unit
Octave bands, Hz
Sound power levels
125 250 500 1000 2000 4000 8000
12HTK dB 71 69 66 63 59 56 49 dB(A) 68
15HTK dB 72 68 66 63 60 54 50 dB(A) 68
Heating mode
Outdoor unit
Octave bands, Hz
Sound power levels
125 250 500 1000 2000 4000 8000
5HK dB 68 62 61 60 54 54 46 dB(A) 64
6HK dB 73 67 67 63 56 56 51 dB(A) 68
9HK dB 73 66 68 63 57 56 51 dB(A) 69
11HK dB
70
68 69 64 60 57 51 dB(A) 70
12HTK dB
72
69 66 63 59 56 50 dB(A) 68
15HTK dB 72 68 67 63 59 56 50 dB(A) 68
Sound power level
dB(A) 41
Sound pressure level* dB(A) 27
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