RDZ UM 06, UM Plus 06, UM Plus 12, UM 08, UM 16 Installation & Technical Manual

Chiller and Heat Pumps

UM / UM PLUS

Monoblock Units

High-eciency air-to-water reversible heat pumps

INSTALLATION / TECHNICAL MANUAL

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

Monoblock Unit HP Inverter

UM 06-08-12-16

UM Plus 06-08-12-16

01 08-2015 A.B.

Rev Date Author Supervisor

Possible wasted electrical or electronic devices/products should not be located together with normal domestic waste, but disposed according to the

current WEEE law in compliance with the European Directive 2012/19/UE. Please inform yourself at your local Administration or at your reseller in case

the product will be replaced with a similar one.

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Notes

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

INDEX

1 AIM AND CONTENTS OF THE MANUAL ............................................................................................................... 5

1.1 HOW

1.2 GRAPHIC

TO KEEP THIS MANUAL ........................................................................................................................ ......... 5

SYMBOLS ................................................................................................................................................ 5

2 SAFETY LAWS ..................................................................................................................................................... 5

3 PERMITTED USES ................................................................................................................................................ 5

4 GENERAL SAFETY GUIDELINES ............................................................................................................................ 6

4.1 WORKERS’

4.2 PERSONAL

4.3 SAFETY

4.4 REFRIGERANT

HEALTH AND SAFETY ............................................................................................................................ 6

SAFETY EQUIPMENTS .................................................................................................................... ....... 6

SYMBOLS ....................................................................................................................... ............................ 6

SAFETY DATA SHEET ....................................................................................................................... 7

5 TECHNICAL CHARACTERISTICS ............................................................................................................................ 8

5.1 FRAME ................................................................................................................................................................... 8

5.2 REFRIGERANT

CIRCUIT ....................................................................................................................... .................... 8

5.3 COMPRESSORS ...................................................................................................................................................... 8

5.4 AIR

SIDE EXCHANGERS .................................................................................................................... ....................... 8

5.5 FANS ....................................................................................................................................................................... 8

5.6 USER

5.7 ELECTRIC

5.8 CONTROL

5.9 MONITORING

5.10 HYDRAULIC

5.11 FAN

SIDE HEAT EXCHANGERS ............................................................................................................................... 8

BOX ......................................................................................................................................................... 8

SYSTEM ........................................................................................................................ .......................... 8

AND PROTECTION DEVICES............................................................................................................. 9

CIRCUIT ....................................................................................................................... ........................ 9

SPEED CONTROL ....................................................................................................................... ...................... 9

6 AVAILABLE VERSIONS ......................................................................................................................................... 9

6.1 OPTIONAL

ACCESSORIES ................................................................................................................... ..................... 9

7 INSTALLATION .................................................................................................................................................. 10

7.1 GENERALITY ......................................................................................................................................................... 10

7.2 LIFTING

7.3 LOCATION

7.4 HYDRAULIC

AND HANDLING ...................................................................................................................................... 10

AND MINIMUM TECHNICAL CLEARANCES ......................................................................................... 10

CONNECTIONS ................................................................................................................... ............... 11

7.4.1 Drainage connection .................................................................................................................................... 11

7.4.2 Plant circuit charging ........................................................................................................ ............................ 11

7.4.3 Plant drainage system .................................................................................................................................. 12

7.4.4 Hydraulic circuit ............................................................................................................................................ 12

7.5 REFRIGERANT

7.6 REFRIGERANT

7.7 ELECTRICAL

DIAGRAM OF UM/UM PLUS 06-08 ................................................................................................ 13

DIAGRAM OF UM/UM PLUS 12-16 ................................................................................................ 13

CONNECTIONS ................................................................................................................................. 13

7.7.1 Wiring terminal block ................................................................................................................................... 14

7.7.2 Removal of protective carter for models 12 and 16 ..................................................................................... 16

8 START UP .......................................................................................................................................................... 16

9 SHUTDOWNS FOR LONG PERIODS .................................................................................................................... 17

10 MAINTENANCE AND PERIODICAL CONTROLS ................................................................................................ 17

10.1 ENVIRONMENTAL

PROTECTION .......................................................................................................................... 18

11 WHEN THE UNIT GOES OUT OF SERVICE ........................................................................................................ 18

12 TECHNICAL DATA .......................................................................................................................................... 19

13 ELECTRIC DATA OF THE UNIT AND AUXILIARIES ............................................................................................. 20

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

14 HEAT PUMPS AVAILABLE HEAD PRESSURE .................................................................................................... 20

14.1 MODELS

UM / UM PLUS ........................................................................................................................................ 20

15 WATER PUMP CURVES .................................................................................................................................. 21

15.1 MODELS

15.2 MODELS

UM / UM PLUS 06-08 ......................................................................................................................... ..... 21

UM / UM PLUS 12-16 ......................................................................................................................... ..... 22

16 PERFORMANCE ............................................................................................................................................. 23

16.1 MOD.

16.2 MOD.

16.3 MOD.

16.4 MOD.

UM / UM PLUS 06 ....................................................................................................................................... 23

UM / UM PLUS 08 ....................................................................................................................................... 25

UM / UM PLUS 12 ....................................................................................................................................... 27

UM / UM PLUS 16 ....................................................................................................................................... 29

17 OPERATING LIMITS ........................................................................................................................................ 31

17.1 EVAPORATOR

17.2 COLD

17.3 HOT

WATER TEMPERATURE (SUMMER OPERATION) ........................................................................................ 31

WATER TEMPERATURE (WINTER OPERATION) ............................................................................................ 31

17.4 AMBIENT

WATER FLOW RATE....................................................................................................................... 31

AIR TEMPERATURE .............................................................................................................................. 31

18 CORRECTION FACTORS FOR USE OF GLYCOL .................................................................................................. 32

19 DIMENSIONS ................................................................................................................................................. 33

19.1 MODELS

19.2 MODELS

19.3 MODELS

UM / UM PLUS 06 ............................................................................................................................ ....... 33

UM / UM PLUS 08 ............................................................................................................................ ....... 33

UM / UM PLUS 12-16 ......................................................................................................................... ..... 34

20 WIRING DIAGRAMS ....................................................................................................................................... 35

20.1 MODELS

20.2 MODELS

20.3 MODEL

UM / UM PLUS 06-08 ......................................................................................................................... ..... 35

UM / UM PLUS 12 ............................................................................................................................ ....... 36

UM / UM PLUS 16 ............................................................................................................................ ......... 37

21 REMOTE CONTROL (OPTIONAL ACCESSORY) .................................................................................................. 38

21.1 CONNECTION

OF THE REMOTE CONTROL TO THE MINICHILLER ......................................................................... 38

22 HYDRAULICS DIAGRAM TYPE ........................................................................................................................ 39

23 CONTROL LOGICS .......................................................................................................................................... 40

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

The manual of UM / UM Plus units contains all the necessary information for the better use of the equipment under safety
conditions for the operator thus meeting the requirements listed in the 2006/42/CE Equipment Directive and following
amendments.

1 AIM AND CONTENTS OF THE MANUAL

This manual provides basic information as for the installation, the operation and the maintenance of the UM / UM Plus units. It is
addressed to machine operators and it enables them to use the equipment efficiently, even if they do not have any previous
specific knowledge of it.
This manual describes the characteristics of the equipment at the time in which it is being put on the market; therefore, it may not
include technological improvements introduced later by the company as part of its constant endeavour to enhance the
performance, ergonomics, safety and functionality of its products.
The company, therefore, is not constrained to update the manuals for previous versions of machines.
It’s recommended that, the user must follow the instructions contained in this booklet, especially those concerning the safety and
routine maintenance.

1.1 HOW TO KEEP THIS MANUAL

The manual has to be always kept with the unit it refers to. It has to be stored in a safe place, away from the dust and moisture. It
has to be accessible to all users who shall consult it any time they are in doubt on how to operate the equipment.
The company reserves the right to modify its products and related manuals without necessarily updating previous versions of the
reference material. It declines also any responsibility for possible inaccuracies in the manual if due to printing or transcription
errors.
The customer shall store any updated copy of the manual or parts of it delivered by the manufacturer as an attachment to this
manual.
The company is available to give any detailed information about this manual and to give information regarding the use and the
maintenance of its own units.

1.2 GRAPHIC SYMBOLS

Indicates operations that can be dangerous for people and/or disrupts the correct operation of the equipment.

Indicates prohibited operations.

Indicates important information that the operator has to follow in order to guarantee the correct operation of the
equipment in complete safety.

2 SAFETY LAWS

The UM / UM Plus units have been designed in compliance with the following Directives and Harmonised Norms:

• 97/23/CE, 2014/35/UE, 2014/30/UE, 2011/65/UE, 2012/19/UE Community Directives

• UNI EN 378-1, 378-2, UNI EN 12735-1 Norms

• CEI EN 60335-2-40 Norms

• CEI EN 55014-1, CEI EN 55014-2, CEI EN 61000-3-2, CEI EN 61000-3-3, CEI EN 62233 Norms

3 PERMITTED USES

• The company excludes any contractual and extra contractual liabilities for damages caused to persons, animals or objects, by

incorrect installation, setting and maintenance, improper use of the equipment, and the partial or superficial reading of the
information contained in this manual.

• These units have been designed only for heating and/or cooling water. Any other use not expressly authorized by the

manufacturer is considered improper and therefore not allowed.

• The location of the plant, the hydraulic and electrical circuits must be established by the planting designer and must take into

account both technical requirements as well as any applicable local laws and authorized specifications.

• The execution of all works must be performed by skilled and qualified personnel, competent in the existing rules in different

countries.

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

l

,

4 GENERAL SAFETY GUIDELINES

Before beginning to operate on UM / UM Plus units every user has to be perfectly knowledgeable about the functions of the
equipment and its controls and has to have read and understood the information listed in this manual.

It’s strictly forbidden to remove and/or tamper with any safety device.
Children or unassisted disabled persons are not allowed to use the appliance.
Do not touch the appliance when barefoot or parts of the body are wet or damp.
Do not clean the unit when the power is ‘ON’.
Do not pul
power supply.
Do not step with your feet on the appliance, sit down and/or place any type of object.
Do not spray or pour water directly on the unit.
Do not dispose of, abandon or leave within reach of children packaging materials (cardboard, staples, plastic bags,
etc.) as they may represent a hazard.
Any routine or not-routine maintenance operation shall be carried out when the equipment has been shut down,
disconnected from electric power sources.
Do not put neither your hands nor insert screwdrivers, spanners or other tools into moving parts of the equipment.
The equipment supervisor and the maintenance man have to receive suitable training for the performance of their
tasks in safety.
Operators have to know how to use personal protective devices and have to know the accident-prevention guidelines
contained in national and international laws and norms.

remove or twist the electrical cables coming out from the unit, even if it is disconnected from the main

4.1 WORKERS’ HEALTH AND SAFETY

The European Community has adopted a number of directives on workplace’s health and safety, which include 89/391/CEE,
89/686/CEE, 2009/104/CE, 86/188/CEE and 77/576/CEE directives. Every employer shall implement such provisions and ensure
that their workers to respect them. We observe therefore that

Do not tamper with or replace parts of the equipment without the specific consent of the manufacturer. The
manufacturer shall have no responsibility whatsoever in case of unauthorised operations.
Using components, expendable materials or spare parts that do not correspond to those recommended by the
manufacturer and/or listed in this manual may be dangerous for the operators and/or damage the equipment
The operator’s workplace has to be kept clean, tidy and free from objects that may prevent free movements.
Appropriate lighting of the work place shall be provided so as to allow the operator to carry out the required
operations safely. Poor or too strong lighting can cause risks.
Ensure that work places are always adequately ventilated and that aspirators are working, in good condition and in
compliance with the requirements of the laws in force.

4.2 PERSONAL SAFETY EQUIPMENTS

When operating and maintaining the UM / UM Plus units, use the following personal protective equipment.

Protective clothing: Maintenance men and operators have to wear protective clothing that complies with the basic
safety requirements currently in force. In case of slippery floors, users have to wear safety shoes with non-slip soles.

Gloves: During maintenance or cleaning operation protection gloves have to be used

Mask and goggles: Respiratory protection (mask) and eye protection (goggles) should be used during
cleaning and maintenance operations.

4.3 SAFETY SYMBOLS

The unit features the following safety signs, which has to be complied with:

General hazards

Electric shock hazard

Presence of moving organs

Presence of surfaces that may cause injures

Presence of hot surfaces that can cause burns

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

4.4 REFRIGERANT SAFETY DATA SHEET

Name: R410A (50% Difluoromethane (R32); 50% Pentafluoroethane (R125).

RISKS INDICATIONS

Major risks: Asphyxia
Specific risks: The rapid evaporation may cause freezing.

FIRST AID

General information: Never give anything by mouth to an unconscious person.
Inhalation: Move to fresh air.
Oxygen or artificial respiration if necessary.
Do not administer adrenaline or similar drugs.
Eyes contact: Rinse carefully with water for at least 15 minutes and consult a doctor.
Contact with skin: Wash immediately with plenty of water.
Take off immediately the contaminated clothing.

FIRE PREVENTION

Extinguishing Media: Whatever.
Specific risks: Increase in pressure.
Specific methods: Use water spray to cool containers

ACCIDENTAL RELEASE ACTIONS

Personal precautions: Evacuate personnel to safe areas.
Provide adequate ventilation.
Use personal protective equipment.
Environmental precautions: Evaporate.
Cleaning method: Evaporate.

HANDLING AND STORAGE

Manipulation
Action/technical precautions: Provide sufficient air exchange and/or suction in work places.
Recommendations for safe use: Do not breathe vapors or aerosol.
Storage: Close tightly and store in a cool, dry and well ventilated place.
Store in original container. Incompatible products: explosive, flammable materials, Organic peroxide

EXPOSURE CONTROL / PERSONAL PROTECTION

Control parameters: AEL (8-h e 12-h TWA) = 1000ml/m³ for each of the two components.
Respiratory protection: For rescue and maintenance operation in storage tanks use self-contained respirator apparatus.
The vapors are heavier than air and can cause suffocation by reducing oxygen available for breathing.
Eyes protection: Safety glasses.
Protection of hands: Rubber gloves.
Hygiene measures: Do not smoke.

PHYSICAL AND CHEMICAL PROPERTIES

Colour: Colourless.
Odor: Light.
Boiling point: -52.8°C at atmospheric pressure.
Lighting point: It does not ignite.
Density: 1.08kg/l at 25°C.
Solubility in water: Negligible.

STABILITY AND REACTIVITY

Stability: No reactivity when used with the appropriate instructions.
Materials to avoid: Highly oxidizing materials. Incompatible with magnesium, zinc, sodium, potassium and aluminum.

Decomposition products These products are halogenated compounds, hydrogen fluoride, carbon oxides (CO, CO2), carbonyl halides.
Risks:

Acute toxicity: (R32) LC50/ inhalation /4 hours/on rat >760 ml/l
(R125) LC50/ inhalation /4 hours/on rat >3480 mg/l
Local effects: Concentrations substantially above the TLV may cause narcotic effects.
Inhalation of decomposed products of high concentrations may cause respiratory failure (pulmonary edema).
Long term toxicity: Did not show carcinogenic, teratogenic or mutagenic effects in animal experiments.

ECOLOGICAL INFORMATION

Global warming potential 1730
GWP (R11=1):
Potential depletion 0
Ozone ODP (R11=1):
Disposal considerations: usable with reconditioning.

The incompatibility is more serious if the metal is present in powdered form or if the surfaces were, recently,
unprotected.

TOXICOLOGICAL INFORMATION

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

5 TECHNICAL CHARACTERISTICS

The UM / UM Plus water chillers and heat pumps series are designed for applications in residential and commercial areas, These
units are extremely versatile and can operate in heat pump mode with the ability of producing hot water at a temperature of 58°C
for environmental heating and sanitary applications. The INVERTER compressor with brushless DC motor technology, matched
with electronic expansion valve, pump and variable speed blower are generally used for optimizing the power consumption and
efficient operation of the refrigerating components.

5.1 FRAME

All UM / UM Plus units are made up of hot-galvanised thick sheet metal, painted with polyurethane powder enamels at 180°C to
ensure the best resistance against atmospheric agents. The frame is self-supporting with removable panels. All screws and rivets
for outdoor installations are in galvanized steel.

5.2 REFRIGERANT CIRCUIT

The refrigerant gas used in these units is R410A. The refrigerant circuit has been manufactured by means of international primary
brands components and according to the UNI EN 13134 Rule concerning welding procedures. The refrigerant circuit includes: 4
way reverse cycle valve, electronic expansion valve, liquid separator (models 09, 12 and 15), liquid receiver, valves for
maintenance and control, pressure safety device according to PED regulation, pressure transducers to accurately adjust the
evaporating and condensing pressures, filters for throttling valve to avoid its clogging.

5.3 COMPRESSORS

The used DC inverter compressors are a rotary hermetic type (for 06 model) and twin rotary (for 06,12 and 15 models) designed to
be used with R410 refrigerant. The compressors are all supplied with crankcase heater and thermal overload protection. They are
mounted on a rubber material acting as a shock absorber.
The compressors are mounted in a separate chamber in order to be separated from the air stream to reduce the noise. The
crankcase heater operates when the compressor remains off for at least 30 minutes and if the discharge temperature is below
20°C (with hysteresis of 2.0°C). When the compressor restarts, the crankcase heater will stop operation. We recommend to turn
on the unit and to put it in standby mode at least 6 hours before the first start-up.
The checking of the compressors is possible through the frontal panel of the unit that allow the maintenance of the compressors
even if the unit is working.

5.4 AIR SIDE EXCHANGERS

The air side exchangers are made up of copper pipes and aluminium fins. The diameter of the copper pipes is 7mm for the model
09 and 5/16” for the other models 12 and 15, the thickness of the aluminium fins is 0,1mm. The tubes are mechanically expanded
into the aluminium fins to improve the heat exchange factor. The geometry of these condensers guarantee a low air side pressure
drop and, then, the use of low rotation (and low noise emission) fans.

5.5 FANS

The fans are axial type with aluminium aerofoil blades. They are statically and dynamically balanced and supplied complete of the
safety fan guard according to the CEI EN 60335-2-80 Rule (safety for electrical apparatus of domestic and similar use). They are
mounted on the unit frame by interposition of rubber vibration dampers. The electric motors are all brushless DC type with 8
poles (about 200/1000 rpm). The motors are directly driven with an integrated thermal overload protection. The protection class
of the motors is IP X4.

5.6 USER SIDE HEAT EXCHANGERS

The user side heat exchangers are made up of AISI 304 stainless steel braze-welded plates type. The user heat exchangers are
factory insulated with flexible close cell material and can be equipped with antifreeze heater (KA optional). Each heat exchanger is
provided with a temperature sensor working as antifreeze protection that activates the circulator, even in the case when the unit
is turned off when the conditions set in the controller have been occurred.

5.7 ELECTRIC BOX

The electric box is manufactured according to the current European Union laws. The accessibility to the board is possible after
removing the front, side and top panels of the unit using proper tools. The protection degree is IP24. The terminal board is
supplied with voltage free contacts for remote ON-OFF, winter/summer change over, auxiliary heater, sanitary water temperature
sensor control of external 3-way valve and free contacts for remote control panel and for the management of the dual set point of
operation.

5.8 CONTROL SYSTEM

All UM / UM Plus units are standard supplied with a microprocessor adopting an overheating control logic program through the
electronic expansion valve which is driven by the pressure transducers signals. The microprocessor is also capable of controlling
the following functions: water temperature regulation, antifreeze protection, compressors’ time setting, compressor automatic
starting sequence, alarm reset, alarm management and operating LED. Upon request, the microprocessor can be connected to a
BMS remote control system and to the simpler HNS system with our terminal units. The control system together with the
INVERTER technology and the on board sensors continuously monitor and adapt the performance of the inverter compressor, of

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

the pump and of the fan (2 fans on models 12 and 16) according to the value of cooling power at any working conditions
requested by the user.

The INVERTER system allows to reduce the plant’s water content to the minimum, that is from the usual value 12-16 l/kW to 18
liters for the 06 model or to 25 liters (for the 08 model) or to 35 liters for the 12 model and to 45 liters for the model 16, in
ABSOLUTE, of the UM / UM Plus units. Because of the reduced water content, the UM / UM Plus units can be also installed in
plants without water tank with advantages in terms of the appliance’s reduced size, the installation space, heat loss and
installation and maintenance costs.

5.9 MONITORING AND PROTECTION DEVICES

All units are standard supplied with the following monitoring and protection devices: return water temperature sensor installed at
the return water pipe line from the plant, operating and antifreeze sensor installed at the outlet pipe of the water to the plant,
high pressure transducer, low pressure transducer, compressor’s inlet and outlet temperature sensors, compressors thermal
protection device, fans thermal protection device, water side installed water flow switch to protect the evaporator, high pressure
HP flow switch.

CAUTION: The INVERTER control system is able to manage in the plant the minimum water contents up to a value
of 18 liters for the 06 model, of 25 liters for the 08 model, of 35 liters for the 12 model, and of 45 liters for the 16
model. This value makes reference to the liters absolute value and not to any kW of installed power.

5.10 HYDRAULIC CIRCUIT

The UM / UM Plus chillers units are supplied with an integrated hydraulic circuit including: circulating pump with high efficiency
DC brushless motor (EEI≤0,23), suitable for chilled water utilization and directly run by a controller on board, plate heat exchanger,
expansion vessel (2 liters), safety valve (6 bar) that have to be connected with a colleting tank, the automatic air release valve and
the flow switch. In the case of V2+ series, there is also a 4-way valve for reversing the flow of the heat exchanger, allowing the
optimization of the yield even in evaporation.

5.11 FAN SPEED CONTROL

This type of control is managed by the microprocessor and is necessary for optimizing the pressure of evaporation/condensation
during summer/winter operation in order to allow proper running of the unit.

6 AVAILABLE VERSIONS

UM 06-08-12-16 reversible heat pump with integrated hydronic system (expansion vessel, safety valve, pressure gauge,

modulating pump, flow switch, automatic air release valve, load/unload valve).
UM 06-08-12-16 Plus reversible heat pump with integrated hydronic system (expansion vessel, safety valve, pressure gauge,
modulating pump, flow switch, automatic air release valve, load/unload valve), with antifreezing kit.
Antifreezing kit is made up of an auto-heating cable that wrapped around the base of the unit near the condensing coil and two
PET heaters installed on the sides of the plate heat exchanger.

6.1 OPTIONAL ACCESSORIES

- Remote control panel to be installed in the room for the unit remote controlling, with additional functions in comparison to

the one installed on board; it can also run our hydronic terminal units.

- Anti-vibration rubber pad to be installed in the chassis of the unit for possible shock absorption.

- 1” Y Filter

- Sanitary sensor

- 1” DHW Diverter valve

- Kit DPI

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

7 INSTALLATION

WARNING: All the operation described in next chapters MUST BE DONE BY TRAINED PEOPLE ONLY. Before any
operation on the unit, be sure that the electric supply is disconnected.

7.1 GENERALITY

When installing or servicing the unit, it is necessary to strictly follow the rules listed in this manual, to conform to all the
specifications of the labels on the unit, and to take any possible precautions. Not observing the rules reported on this manual can
create dangerous situations.

After receiving the unit, immediately check its integrity. The unit left the factory in perfect condition; any eventual
damage has to be questioned to the carrier and recorded on the Delivery Note before signing it.

The company has to be informed, within 8 days, of the extent of the damage. The Customer should prepare a written statement of
any severe damage.

WARNING: The units are designed for outdoor installation. The place of installation must be entirely far away from
fire risk. All the necessary measures should be adopted in order to prevent the fire risk in the place of installation. The
outdoor ambient temperature shall not exceed 46°C. Above this value, the unit is no longer covered by the directives
in force in the area of pressure equipment.

WARNING: The unit should be installed so that adequate clearance is available for maintenance and repairation. The
warranty does not cover costs related to platforms or handling equipment necessary for any maintenance.

All maintenance and testing operations should be carried out only by QUALIFIED PERSONNEL.

Before any operation on the unit, make sure the power supply is disconnected.

WARNING: MOVING PARTS, RISK OF DEATH.
Disconnect the power supply and ensure that the fan is stopped before opening the front panel.

The temperatures of heads and discharge piping of the compressor are usually high.

Be careful when working near condensing coils.
The aluminum fins are very sharp and can cause serious injuries.

After the maintenance operations, close the panels tightly with the fastening screws.

7.2 LIFTING AND HANDLING

When unloading and installing the unit, it is highly recommended to
avoid any sudden move in order to protect the inner components.
Units can be lifted by means of a forklift or, in alternative, of belts,
being sure not to damage the lateral panels and the cover. It is
important to keep the unit horizontal during these operations.

7.3 LOCATION AND MINIMUM TECHNICAL CLEARANCES

The all UM / UM Plus units are designed for outdoor installation: any cover over the unit and location near trees (even if they
partially cover the unit) has to be avoided in order to prevent air recirculation. It is advisable to create a proper basement, with a
size similar to unit foot-print. Unit vibration level is very low: it is advisable however, to fit a rigid rubber band between basement
and unit base-frame. It is also possible to install anti-vibration supports (springs or rubbers) to keep vibrations at a very low level.
Absolute care has to be taken to ensure adequate air volume to the condenser. Re-circulation of discharge air has to be avoided;
failure to observe this point will result in poor performance or activation of safety controls. For these reasons it is necessary to
observe the following clearances:

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UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

Models A B* C D E**

UM / UM Plus 06 1500 500 400 400 500
UM / UM Plus 08 1500 500 400 400 500
UM / UM Plus 12 1500 500 400 400 500
UM / UM Plus 16 1500 500 400 400 500

* The recommended minimum distance for installation and maintenance.
** The recommended minimum distance for assistance and maintenance

7.4 HYDRAULIC CONNECTIONS

The hydraulic connections have to be installed in accordance with national and local regulations; pipes can be made up of steel,
galvanized steel or PVC. Pipes have to be designed depending on the nominal water flow and on the hydraulic pressure drops of
the system. All pipes have to be insulated with closed-cell material of adequate thickness. Chillers have to be connected to piping
by means of flexible joints. Piping should include:

• Hole thermometers to monitor the system’s temperature.

• Manual gate valves to separate the chiller from the hydraulic circuit.

• Y-shaped metallic filter (to be mounted on the inlet pipe) with a mesh not larger than 1mm.

• Charging group and discharge valve, where necessary.

WARNING: Make sure that, when designing the pipe length and diameter, do not exceed the maximum headloss
on the plant side, please see the technical data given in the table of Paragraph 12 (available pressure head).

WARNING: Connect the pipes to the attacks by using always key against key system.

WARNING: The expansion vessel have a limited volume. The installator have to provide a further expansion vessel
if it is necessary.
WARNING: Unit water inlet pipe have to be in correspondence with the connection labelled: ”WATER INLET”,
otherwise the evaporator may freeze.
WARNING: It is compulsory to install on the WATER INLET connection a metallic filter with a mesh not larger than
1mm. Should the water flow switch be altered or should the filter not be installed, the warranty will no longer be
valid. The filter have to be kept clean, so make sure it is clean after the unit has been installed, and then check it
periodically.
All units are standard supplied with the water flow switch (factory installed). Should the water flow switch be
altered, removed, or should the water filter not be installed on the unit, the warranty will be invalidated. Please
refer to the wiring diagram for the water flow switch electric connections.

7.4.1 Drainage connection

All UM / UM Plus units have been designed to use their own base as a drain pan; a plastic pipe fitting is standard provided to be
installed onto the lower part of the unit in the special housing enabling the connection of a drainage pipe.

Drainage pipe fitting Drainage pipe fitting housing Drainage pipe fitting connected to the unit

Each unit is also provided, on the basement of the hydronic kit (accessible from the right sides panels), with a hole that can allow
to drain any condensation that may escape from plumbing pipes. As well as the pipes are well-insulated, the production of
condensate is however very low and therefore the connection of a drainage pipe to that hole is not required.

7.4.2 Plant circuit charging

WARNING: Verify all the charging/topping up operations.
WARNING: Before beginning the charging/topping up operation of the plant circuit, disconnect the unit for the

electric power supply.
WARNING: The charging/topping up of the plant circuit must always be done under controlled conditions of
pressure (max 1 bar). Make sure that you have installed on the line of charging/topping up a pressure
reducerdevice and a relief valve.
WARNING: The water on the charging/topping up pipe must be suitably pre-filtered from any impurities and
suspended particles. Make sure that you have installed a cartridge filter removable.

WARNING: Before beginning the charging /topping up operation, unscrew the plug of the air vent valve. Tighten
the plug after finishing the operation of charging/topping up of the plant circuit system.

11

Cap with gasket

7.4.3 Plant drainage system

1

Knurled nut

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

During the operations of charging/topping up, the plugs of the air vent valves must
be partially unscrewed to allow air to flow freely out of the valves.

(1) Plug of the air vent valve

You can use the service valve, when it is necessary to refill the plant or adapt the
concentration of glycol. Unscrew the cap of the service valve and connect to the
hose a pipe of 14 mm (inner diameter) connected to the water network, and then
load the system by unscrewing the knurled nut. When the operation is concluded,
retighten the knurled nut and screw on the cap. In any case, we recommend you to
use for the water loading of the plant an external tap whose arrangement is by the
installer.

When it is necessary to drain the plant, close at first the inlet and outlet manual gate valves (not supplied) and then remove the
pipes that are disposed externally on the water inlet and on the water outlet in order to spill away the liquid contained in the unit
(for easier operation, it is recommended to install externally two draining valves, on the water inlet and on the water outlet,
between the unit and the manual gate valves).

7.4.4 Hydraulic circuit

Models: UM / UM Plus

G

E

F

H

D

C

A

B

KEY

A Plate heat exchanger F Air vent valve
B Water flow switch G
C Service valve H
D Pump with DC brushless motor
E Expansion vessel

Safety valve

Pressure gauge

12

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

7.5 REFRIGERANT DIAGRAM OF UM/UM Plus 06-08

LP HP

ST

LS

IN

OUT

P

LR

C

CLS

DT

FL FL

EEV

Pr

4WV

M

SE

7.6 REFRIGERANT DIAGRAM OF UM/UM Plus 12-16

LP

C

ST

LS

IN

OUT

CLS

FL FL

LR

DT

NRV

CP

P

OS

EEV

HP

Pr

4WV

M

SE

C COMPRESSOR

CLS COMPRESSOR LIQUID SEPARATOR

ST COMPRESSOR INLET TEMPERATURE
DT COMPRESSOR OUTLET TEMPERATURE
HP HIGH PRESSURE TRANSDUCER

Pr HIGH PRESSURE FLOW SWITCH

LP LOW PRESSURE TRANSDUCER

LS LIQUID SEPARATOR (only for model 09)

4WV VALVE FO INVERTING CYCLE

LR LIQUID RECEIVER

EEV ELECTRONIC EXPANSION VALVE

FL FILTER

M AXIAL FAN

SE OUTDOOR AIR TEMPERATURE

P CIRCULATOR ON BOARD UNIT

IN WATER INLET TEMPERATURE

OUT WATER OUTLET TEMPERATURE

C COMPRESSOR

CLS COMPRESSOR LIQUID SEPARATOR

OS OIL SEPARATOR

ST COMPRESSOR INLET TEMPERATURE
DT COMPRESSOR OUTLET TEMPERATURE
HP HIGH PRESSURE TRANSDUCER

Pr HIGH PRESSURE FLOW SWITCH

LP LOW PRESSURE TRANSDUCER

LS LIQUID SEPARATOR

4WV VALVE FO INVERTING CYCLE

LR LIQUID RECEIVER

EEV ELECTRONIC EXPANSION VALVE

NRV NO RETURN VALVE

FL FILTER

M AXIAL FAN

SE OUTDOOR AIR TEMPERATURE

P CIRCULATOR ON BOARD UNIT

IN WATER INLET TEMPERATURE

OUT WATER OUTLET TEMPERATURE

CP CAPILLARY

7.7 ELECTRICAL CONNECTIONS

Check out that the power supply meets the unit’s electric nominal data (tension, phases, frequency) reported on the label in the
unit’s right-side panel. Power connections have to be made in accordance to the wiring diagram enclosed with the unit and in
conformity with the national and international norms in force (providing equipment as general magnetothermic circuit breaker,
differential circuit breakers for each electric line, proper grounding for the plant, etc.). Power cables, electric protections and line
fuses have to be sized according to the specifications listed in the wiring diagram enclosed with the unit and in the electrical data
contained in the table of technical characteristics (see Paragraph 12).

WARNING: Installer has to provide a general circuit breaker (for example a magnetothermic circuit breaker) at the
beginning of unit circuit system.
WARNING: The supply voltage’s fluctuations cannot exceed ±10% of the nominalvalue. Should this tolerance not be
respected, please contact our technical department.
WARNING: The power supply have to respect the listed limits: failing this, warranty will terminate immediately.
Before any operation on the unit, be sure that the power supply is disconnected.
WARNING: The water flow switch (B component in the previous hydraulic circuit and factory installed) have ALWAYS
to be connected following the indications listed in the wiring diagram. Never bridge the water flow switch
connections in the terminal board. Should the water flow switch connections altered or not properly made, the
guarantee will be invalidated.

WARNING: The remote control panel is connected to the water chiller by means of no.4 wires having a 1,5 mm
section. The power supply cables have to be separated from the remote control wires. The maximum distance is 50m.

WARNING: The remote control panel cannot be installed in areas with strong vibrations, corrosive gases, and excess
of dirtiness or high humidity levels. Leave free the area near the cooling openings.

2

13

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

r

7.7.1 Wiring terminal block

Electrical wiring have to be done only by qualified personnel.

The electrical connections have to be realized by qualified personnel. The terminal block is located under the plastic cover on the
side of the hydraulic connections (for the models 12 and 16, it is necessary to remove the protective carter). The wiring to the
terminal block has to be realized in accordance to the below notes (the drawing is for illustration).

The connections indicated below are standard. Other connections are shown in the manual of the on board control of the
minichiller UM / UM Plus (see "TABLE OF CONFIGURATIONS ALLOWED TO USER AND INSTALLER"), depending on the configurations
adopted.
Terminal Type Connection

GND Power supply

1-Ph/N/PE
230V, 50Hz

Connect the grounding wire
(3-Ph/N/PE
400 Vac, 50Hz for the model of 15kW)

N1 Power supply

1-Ph/N/PE
230V, 50Hz

Connect the power supply neutral wire;
(3-Ph/N/PE
400 Vac, 50Hz for the model of 15kW)

L1 Power supply

1-Ph/N/PE
230V, 50Hz
(3-Ph/N/PE

Connect the power supply phase wire; (note that, in the three-phases

versions there are two other terminals, L2 and L3)

400 Vac, 50Hz for the model of 15kW)

Power supply NC terminal (230V AC) for 3-way valve for sanitary hot water

boiler (used only for 3-way valve with 3 contacts for power supply

connection to switching-over to the plant side)

Power supply neutral terminal (230V AC) for 3-way valve for sanitary hot

water boiler.

Power supply NO terminal (230V AC) for 3-way valve for sanitary hot wate

boiler (to switch-over the valve to the boiler side).

Power supply NC terminal (230V, 50Hz, 5A resistive, 1 A inductive) for 3-

way dual set point valve for radiant panels.

Power supply neutral terminal (230V AC) for 3-way dual set point valve for

radiant panels.

Power supply NO terminal (230V, 50Hz, 5A resistive, 1 A inductive) 3-way

valve dual set point for radiant panels.

NC1

N

NO1

NC2

N2

NO2

Digital output
230 Vac with changeover contact

Digital output
230 Vac with changeover contact
Digital output
230 Vac with changeover contact
Digital output
230 Vac with changeover contact
Digital output
230 Vac with changeover contact
Digital output
230 Vac with changeover contact

R+ Serial communication Modbus + signal connection to remote control
R- Serial communication Modbus - signal connection to remote control
GNDR Serial communication connection to modbus ground for remote control
12V+ Power supply output 12Vac, 50Hz Power output for remote control (12V, 50Hz, 500mA)
12V- Power supply output 12Vac, 50Hz Power output for remote control (12V, 50Hz, 500mA)
SE Analogue (ST8)/digital (DI7) input Humidistat terminal for the dual set-point regulation (optional)
SE Analogue (ST8)/digital (DI7) input Humidistat terminal for the dual set-point regulation (optional)
AEHN Digital output (DO3) 230 Vac Neutral output of auxiliary electric heater for plant water (230V, 50Hz, 5A)
AEH Digital output (DO3) 230 Vac Phase output of auxiliary electric heater for plant water (230V, 50Hz, 5A)
SAN Analogue (ST9)/digital (DI8) input Sanitary water boiler sensor terminal

14

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

SAN Analogue (ST9)/digital (DI8) input Sanitary water boiler sensor terminal
DO5N Digital output (DO5) 230 Vac Neutral output (for other configuration)
DO5 Digital output (DO5) 230 Vac Phase output (for other configuration)

DO4N Digital output (DO4) 230 Vac

DO4 Digital output (DO4) 230 Vac

SW Digital input

SW Digital input

onoff Digital input Remote on-off terminal (closed = unit ON/open = unit OFF)
onoff Digital input Remote on-off terminal (closed = unit ON/open = unit OFF)
0-10V+ Analogue input (ST10) Input signal 0-10V (+) for set point adjustment
0-10V- Analogue input (ST10) Input signal 0-10V (-) for set point adjustment

Neutral output (230V, 50Hz, 5A resistive, 1 A inductive) (optional to be

used only on UM unit, without antifreeze kit)

Phase output (230V, 50Hz, 5A resistive, 1 A inductive) (optional to be used

only on UM unit, without antifreeze kit)

Summer/winter switching mode terminal via remote control (closed =

summer/open = winter);

Summer/winter switching mode terminal via remote control (closed =

summer/open = winter)

15

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

7.7.2 Removal of protective carter for models 12 and 16

The following shows the procedure for removing the protective carter so you can access the terminal block in models 12 and 16.

1)Remove the indicated screws

In order to reposition and fix the carter, repeat the procedure on the contrary.

2) Push down the right side panel

8 START UP

3) Turn the right side panel in the
direction indicated by the arrow to
remove it.

Before start-up:

• Check out the availability of the supplied wiring diagrams and manuals of installed apparatus.

• Check out the availability of the electrical and hydraulic diagrams of the plant in which the unit is installed.

• Check that the shut-off valves of the hydraulic circuits are open.

• Verify that the hydraulic circuit has been charged under pressure and air vented.

• Check out that all water connections are properly installed and all indications on unit labels are observed.

• Ensure that arrangements have been provided to drain the condensate.

• Check out that all power cables are properly connected and all terminals are hardly fixed.

• Check that electrical connections are carried out according to the norms in force including grounding.

• Check out that the voltage is the one shown in the unit labels.

• Make sure the voltage is within the limits (±10%) of tolerance range.

• Check out that crankcase heaters are powered correctly.

• Check out that there is no refrigerant leakage.

• Check out that all the cover panels are installed in the proper position and locked with fastening screws before start up.

WARNING: The unit must be connected to the electrical network and should be in STAND-BY mode (powered) closing
the general switch in order to operate the crankcase heaters of the compressor for a minimum of 12 hours before
start up. (the heaters are automatically powered when the main switch is switched off). The crankcase heaters are
working properly if, after some minutes, the temperature of crankcase’s compressor is about 10°C ÷ 15°C higher than
ambient temperature.
WARNING: The weight of the pipes doesn’t load unit structure.
WARNING: Never switch off the unit (for a temporary stop) by switching off the main switch: this component should
be used to disconnect the unit from the power supply only for lengthy stoppages (e.g. seasonal stoppages). Besides,
failing the power supply, the crankcase’s heaters are not supplied thus resulting in a possible breakdown of the
compressors once the unit is switched on.
WARNING: Do not modify the internal wiring of the unit otherwise the warranty will terminate immediately.
WARNING: The summer/winter operating mode have to be selected at the beginning of the related season. Frequent
and sudden changes of this seasonal operating mode have to be avoided in order to prevent severe damages to
compressors.
WARNING: When you first install and start-up the unit make sure that the unit is working properly in both cooling
and heating modes.

16

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

9 SHUTDOWNS FOR LONG PERIODS

The types of shutdown depends on the weather of the site where the unit is installed and on the period of the stop. The antifreeze
system, if it’s installed, stay on work also with the on-board control unit in “OFF” position.
If the time of stop is long and the temperature is low, we recommend to drain the hydraulic circuits or use a mixture of water and
glycol.
Drain the hydraulic circuits and shutdown the unit with this passage:

• Turn off the unit by placing the switch of each unit to "OFF" position.

• Close the water valves.

• Place the general differential circuit breaker to "OFF" position, if it is installed.

If the temperature drops below 0°C there is serious danger of frost: add a mixture of water and glycol in the
plant, otherwise drain the hydraulic circuits of the plant and of the heat pump.

WARNING: the operation, although it was transient, with water temperatures below +5°C is not guaranteed on
the basis of the limits set out in Paragraph 17.4. Before you turn the unit on after a long off period, make sure
that the temperature of the mixture of water and glycol is higher than or at least equal to + 5°C.

10 MAINTENANCE AND PERIODICAL CONTROLS

WARNING: All the operations described in this chapter HAVE TO BE CARRIED OUT BY TRAINED STAFF ONLY.
Before any operation or before entering the inner components of the unit, be sure that the power supply is
disconnected. The compressor’s heads and discharge piping are usually at high temperature levels. Be very
careful when operating in their surroundings. Aluminium coil fins are very sharp and can cause serious wounds.
Be very careful when operating in their surroundings. After maintenance operations, re-install the cover panels,
and fix them by means of screws.

The refrigerant circuits must not be filled with different gas other than that indicated on the nameplate. The use
of a different refrigerant can cause severe damage to the compressor.

It’s forbidden to use oils other than those specified in this manual. The use of a different oil can cause serious
damage to the compressor.

The temperatures of heads and discharge piping of the compressor are usually high.

Be careful when working near condensing coils.
The aluminum fins are very sharp and can cause serious injuries.

After the maintenance operations, close the panels tightly with the fastening screws.

It is a good rule to carry out periodic checks in order to verify the proper operation of the unit.

OPERATION 1 month 4 month 6 month

Filling the water circuit. x
Presence of bubbles in the water circuit. x
Check out that safety and control devices work correctly. x
Check out possible oil leakage from compressor. x
Check out possible water leakages from the hydraulic circuit. x
Check out the proper working of the flow switches. x
Check out that the crankcase electric heaters are properly supplied and functioning. x
Clean the metallic filters of the hydraulic circuit. x
Clean the finned coil by means of compressed air or water jet. x
Check out that all the terminals on the electric board as well as on the terminals of the compressor are

properly fixed.
Tightening of water connections. x

Check out the tightening and the balancing of the fan blades. x
Correct voltage. x
Correct absorption. x
Check the refrigerant charge. x
Check the operating pressure, and superheat and subcooling. x
Check of the efficiency of circulation pump. x
Check the expansion tank. x
If the unit should be out of service for a long period, discharge water from the piping and from heat
exchanger. This operation is necessary if, during seasonal stoppages, ambient temperature is expected to
go down below the freezing point of the employed fluid.

x

x

17

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

10.1 ENVIRONMENTAL PROTECTION

According to the norms dealing with the use of depleting stratospheric ozone substances, it is forbidden to release refrigerants
fluids in the atmosphere. They have to be collected and delivered to the seller or to proper gathering points at the end of their
operating life. Refrigerant R410A is mentioned among controlled substances and for this reason it has to be subjected to the
mentioned norms. A particular care is recommended during service operations in order to reduce as much as possible any

refrigerant loss.

11 WHEN THE UNIT GOES OUT OF SERVICE

Once the unit is arrived at the end of its life cycle and needs to be removed or replaced, the following operations are
recommended:

• the refrigerant has to be recovered by trained people and sent to proper collecting centre;

• compressors’ lubricating oil has to be collected and sent to proper collecting centre;

• the frame and the various components, if not serviceable any longer, have to be dismantled and divided according to their
nature, particularly copper and aluminium, which are present in conspicuous quantity in the unit. These operations allow easy
material recover and recycling process, thus reducing the environmental impact.

18

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

12 TECHNICAL DATA

Twin Rotary

DC Inverter

UM / UM Plus Model

Twin Rotary

DC inverter

Twin Rotary

DC inverter

TECHNICAL CHARACTERISTICS Unit

Power supply

Electric data

Cooling

Heating

Compressor

Fan motor

Refrigerant

Hydraulic
circuit

Noise level Sound pressure (7) dB(A) 44÷50 45÷53 46÷54 46÷54

Dimensions
and weight

Total power input kW 2,76 4,55 5,67 7,85
Maximum starting current A 7,8 12,9 16,1 7,3
Maximum current input A 12,1 20,0 24,9 11,3

Cooling capacity (1) kW

Power input (1) kW 1,27 2,20 2,88 3,44

E.E.R. (1) W/W 4,02 3,78 4,01 3,83

Cooling capacity (2) kW

Power input (2) kW 1,28 2,06 2,60 3,37

E.E.R. (2) W/W
ESEER (5) W/W
Heating capacity (3) kW 2.60 - 5.77 - 6.20* 4.72 - 9.06 - 9.90* 5.09 - 12.40 - 13.19* 6.62 - 14.16 - 15.82*
Power input (3) kW 1.39 2.21 2.95 3.45
C.O.P. (3) W/W 4.15 4.11 4.21 4.11
Heating capacity (4) kW 2.46 - 5.46 - 5.78* 4.48 - 8.80 - 9.28* 4.81 - 11.66 - 12.43* 6.21 - 13.75 - 14.50*
Power input (4) kW 1.63 2.67 3.41 4.25
C.O.P. (4) W/W 3.34 3.30 3.42 3.24
SCOP (6) W/W 3.84 3.83 3.84 3.83

Type

Number 1 1 1 1
Power input in cooling mode (1) kW
Power input in cooling mode (2) kW
Power input in heating mode (3) kW
Power input in heating mode (4) kW
Refrigerant oil (type, quantity) mL ESTER OIL VG74, 480 ESTER OIL VG74, 820 FV50S, 1070 FV50S/1400
Type Motore DC Brushless Motore DC Brushless Motore DC Brushless Motore DC Brushless
Number 1 1 2 2
Rated power input kW 0,156 0,188 0,144 (×2) 0,180 (×2)
Rated current input A 0,68 0,82 0,63 (×2) 0,79 (×2)
Speed r/min 900 900 800 1000
Max. air flow m3/s 1,08 1,63 2,11 2,59
Type R410A R410A R410A R410A
Refrigerant quantity kg 1,55 2,10 3,65 3,90
Design pressure (high/low) MPa 4,2/2,7 4,2/2,7 4,2/2,7 4,2/2,7
Water flow rate (3) m3/h
Available head pressure (3) kPa 56,4 33,4 46,2 38,0

Rated power input of the water pump (3)

Max power input of the water pump kW 0,063 0,063 0,087 0,087
Max. current input of the water pump A 0,47 0,47 0,71 0,71
Energy Efficiency Index (EEI)
Expansion vessel L 2 2 2 2
Hydraulic connections inch 1”M 1”M 1”M 1”M
Minimum volume of water L 18 25 35 45

Dimensions (L×H×W) mm 1134x719x373 1229x861x368 1258×1402×448 1258×1402×448
Max. Packing dimensions (L×H×W) mm 1310x850x430 1310x1000x430 1430x1546x690 1430x1546x690
Operating weight kg 73 92 147 152
Net/Gross weight kg 69/77 87/96 140/153 145/158

V/Ph/Hz

230V/1/50Hz 230V/1/50Hz 230V/1/50Hz 400V/3P+N+T/50Hz

kW 0,063 0,063 0,087 0,087

≤ 0.23 ≤ 0.23 ≤ 0.23 ≤ 0.23

06 08 12 16

2.46 - 5.09 5.57* 4.42 - 8.31 8.91* 4.88 - 11.57 12.44* 6.48 - 13.17 14.73*

1.77 - 3.92 4.41* 3.21 - 6.14 7.57* 3.50 - 7.76 10.10* 4.58 - 9.92 12.10*

3,07 2,97 2,98 2,94
6,20 5,78 6,15 5,98

Single Rotary

DC Inverter

1,20 2,04 2,66 3,12
1,20 1,91 2,38 3,06
1,24 2,01 2,72 3,10
1,48 2,47 3,18 3,89

0,99 1,56 2,13 2,44

Operating conditions:

(1) Cooling: Outdoor air temperature 35°C; inlet/outlet water temperature 12/7°C.
(2) Cooling : Outdoor air temperature 35°C; inlet/outlet water temperature 23/ 18°C.
(3) Heating: Outdoor air temperature 7°C DB 6°C WB; inlet/outlet water temperature 30/35°C.
(4) Heating: Outdoor air temperature 7°C DB 6°C WB; inlet/outlet temperature 40/45°C.
(5) Cooling: Water temperature inlet/outlet 23/18°C.
(6) Heating: in average climate condition; T

=-7°C; water temperature inlet/outlet 30/35°C.

biv

(7) Sound pressure level measured at 1m from the unit, in free field, according to ISO 3746.
(*)with Hz max function (factory installed). This function can be disabled only with optional kit Evo Touch (unscheduled).

N.B. The performance data are indicative and could be subject to change. In addition, the performances declared in (1), (2), (3) and (4) are to be understood
referring to the instantaneous power according to UNI EN 14511. The declared data in (6) is determinated according to UNI EN 14825.

WARNING: The minimum temperature allowed for storing the unit is 5°C.

19

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

70

3

13 ELECTRIC DATA OF THE UNIT AND AUXILIARIES

Power supply of the unit V/~/Hz 230/1/50*-400/3/50** Remote control circuit V/~/Hz 12/1/50
Control board circuit V/~/Hz 12/1/50 Fans power supply V/~/Hz 230/1/50

For the models 06, 08, 12* - For the model 16**.

Note: Electric data may change for updating. It is therefore necessary to refer always to the technical data label stuck on rig ht­side panel of the unit.

14 HEAT PUMPS AVAILABLE HEAD PRESSURE

Below the characterisc curves corresponding to Head pressure -Water flow without head losses of the hydronic kit. The opmal
operang point is shown on each curve under the specified condions at the apex (3) p. 19.
The circuit’s plant must be designed so as to ensure the nominal water flow rate corresponding to the operang points indicated
below.

14.1 MODELS UM / UM Plus

60

50

40

30

Head [Kpa]

20

UM 06

UM 08

UM 12

UM 16

20

10

0

0,5 0,75 1 1,25 1,5 1,75 2 2,25 2,5 2,75

Flow [m3/h]

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

Q [m³/h]

H

[kPa]

p

]

Q [m³/h]

15 WATER PUMP CURVES

15.1 MODELS UM / UM Plus 06-08

[m]

7

60

50

40

30

20

10

6

5

4

3

2

1

0

0

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

P1

Q [l/s

[W]

60

50

40

30

20

10

0

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0

21

15.2 MODELS UM / UM Plus 12-16

Q [m³/h]

H

[kPa]

p

]

Q [m³/h]

[m]

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

80

60

40

20

8

6

4

2

0

0

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4

0.0 0.2 0.4 0.6 0.8 1.0 1.2

P1

Q [l/s

[W]

100

80

60

40

20

0

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4

22

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

5

6

air 45 ° C air 40 ° C air 35 ° C

16 PERFORMANCE

16.1 MOD. UM / UM Plus 06

air 30 ° C air 25 ° C air 20 ° C

18
17
16
15
14
13
12
11
10

9
8
7

Out water temperature [°C]

6
5

3,0 3,5 5,0 5,

4,0 4,5

Cooling Capacity [kW]

air 45 ° C air 40 ° C air 35 ° C

air 30 ° C air 25 ° C air 20 ° C

18
17
16
15
14
13
12
11
10

9
8
7

Out water temperature [°C]

6
5

0, 16 ,4 1,

0,8 1,0 1,2,

Refrigeration power consumption [kW]

23

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

0

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

Out water temperature [°C]Out water temperature [°C]

25

4,0 4,5 5,0 5,5 6,0 6,5

Heating Capacity [kW]

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

25

1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,

Heat pump power consumption [kW]

24

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

16.2 MOD. UM / UM Plus 08

air 45 °C air 40 °C air 35 °C

air 30 °C air 25 °C air 20 °C

18
17
16
15
14
13
12
11
10

9
8
7

Out water temperature [°C]Out water temperature [°C]

6
5

4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0

Cooling Capacity [kW]

air 45 °C air 40 °C air 35 °C

air 30 °C air 25 °C air 20 °C

18
17
16
15
14
13
12
11
10

9
8
7
6
5

1,0 1,2 2,6 2,81,4 1,6 1,8 2,0 2,2 2,4

Refrigeration power consumption [kW]

25

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

0

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

Out water temperature [°C]

25

7,5 8,0 8,5 9,0 9,5 10,

Heating Capacity [kW]

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

Out water temperature [°C]

25

1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0 3,2 3,4 3,6 3,8

Heat Pump power consumption [kW]

26

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

12,5

16.3 MOD. UM / UM Plus 12

air 45 °C air 40 °C air 35 °C

air 30 °C air 25 °C air 20 °C

18
17
16
15
14
13
12
11
10

9
8
7

Out water temperature [°C]

6
5

5,5 6,5 7,5 8,5 9,5 10,5 11,5

Cooling Capacity [kW]

air 45 °C air 40 °C air 35 °C

air 30 °C air 25 °C air 20 °C

18
17
16
15
14
13
12
11
10

9
8
7

Out water temperature [°C]

6
5

1,4 1,8 2,2 2,6 3,0 3,41,6 2,0 2,4 2,8 3,2 3,6

Refrigeration power consumption [kW]

27

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

0

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

Out water temperature [°C]

25

8 9 10 11 12 13

Heating Capacity [kW]

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

Out water temperature [°C]

25

2,0 2,5 3,0 3,5 4,0 4,5 5,

Heat Pump power consumption [kW]

28

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

0

16.4 MOD. UM / UM Plus 16

air 45 °C air 40 °C air 35 °C

air 30 °C air 25 °C air 20 °C

18
17
16
15
14
13
12
11
10

9
8
7

Out water temperature [°C]

6
5

7,5 8,0 8,5 9,0 9,5 10,0 10,5 11,0 11,5 12,0 12,5 13,0 13,5 14,

Cooling Capacity [kW]

air 45 °C air 40 °C air 35 °C

air 30 °C air 25 °C air 20 °C

18
17
16
15
14
13
12
11
10

9
8
7

Out water temperature [°C]

6
5

1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0 3,2 3,4 3,6 3,8 4,0 4,2

Refrigeration power consumption [kW]

29

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

5

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

Out water temperature [°C]

25

9 10 11 12 13 14 15

Heating Capacity [kW]

air 12 °C air 7 °C air 2 °C

air -7 °C air -10 °C air -15 °C

air -2 °C

55

50

45

40

35

30

Out water temperature [°C]

25

2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,

Heat Pump power consumption [kW]

30

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

17 OPERATING LIMITS

17.1 EVAPORATOR WATER FLOW RATE

The nominal water flow rate is referred to a ∆T equal to 5°C, between the evaporator’s inlet and outlet temperatures. The allowed
maximum flow rate is corresponding to ∆T=3°C; higher values may cause too high pressure drops. The allowed minimum water
flow rate is corresponding to ∆T=8°C (except for the models UM / UM Plus 06 for which a maximum temperature difference of
∆T=6,25°C is allowed). Insufficient values may cause too low evaporating temperatures with the intervention of safety devices
which would stop the unit and, in some particular cases, the water can freeze in the evaporator coil causing the refrigeration
circuit to break down.
We enclosed below a most accurate table showing the minimum flow rates that to ensure for the plate heat exchanger for a the
proper operation of unit according to the model (note: the water flow switch is used for preventing the freezing sensor from
failure in the case of insufficient water flow but it does not ensure the minimum flow rate required in order the unit can work
properly)

Models

Cooling capacity for reference [kW] 5,09 8,31 11,57 13,17
Minimum water flow rate that to ensure

[m3/h]

As a first approach, and in the absence of other detection systems, the proper flow rate for getting the best performance from
your unit can be found at maximum speed of the circulator, using the pressure gauges for controlling the pressure difference
between the return and the delivery water on the outside water connections of the unit and make sure that such value is equal or
less than the static pressure indicated on the curves shown in paragraph 14 for the respective models.

06 08 12 16

0,70 0,89 1,24 1,42

UM / UM Plus

17.2 COLD WATER TEMPERATURE (SUMMER OPERATION)

The allowed minimum temperature at the evaporator’s outlet is 5°C; for more lower temperatures please contact us. In this case
contact our company for the feasibility study and evaluation of changes to be made according to your requests. The maximum
temperature that can be maintained at the outlet of the evaporator is 25°C. Higher temperatures (up to a maximum of 40°C) can
anyway be tolerated during transitions and start-up phases of the system.
In all cases, the maximum electrical input occurs for the heat pump operating mode at a water outlet temperature of 58°C and
with outdoor temperature of -15°C.

17.3 HOT WATER TEMPERATURE (WINTER OPERATION)

Once the system is working at the right temperature, the inlet hot water temperature should not to be lower than 25°C; the
lowest values that are not related to transitional or start-up stages may cause system’s malfunction and possible compressor
breakdowns. The maximum outlet water temperature have not to exceed 58°C. At this temperature, the power consumption and
performance in terms of C.O.P. are enhanced if the outdoor temperature is higher than 5°C, even if the unit is still able to work up
to the limit of -15°C.
For higher temperatures than those pointed out, especially if have a concomitant with the reduction of the water flow rate, it may
cause abnormalities to the normal operating of the unit, or the safety devices act in critical cases.

17.4 AMBIENT AIR TEMPERATURE

The units are designed and manufactured to operate, in summer operation, with the condensate control, with outdoor air
temperatures ranging between -10°C and 46°C. While operating as a heat pump, the allowed range of the outdoor temperature
goes from -15°C to 40°C as a function of the water outlet temperature as indicated in the below table.

Operation limits

Water chiller mode

Ambient temperature Minimum -10°C Maximum +46°C
Water outlet temperature Minimum +5°C Maximum +25°C
Heat pump mode
Ambient temperature Minimum -15°C Maximum +30°C
Water outlet temperature Minimum +25°C Maximum +58°C/+63°C
Heat pump mode for sanitary hot water
Ambient temperature with maximum water temperature 48°C Minimum -15°C Maximum +40°C
Ambient temperature with maximum water temperature 55°C Minimum -15°C Maximum +35°C
Water outlet temperature Minimum +20°C Maximum +58°C/+63°C*

(*) with a supplementary electric heater (optional)

Below the operation limits are graphed, in the case of air conditioning and sanitary hot water production.

31

WATER CHILLER/HEAT PUMP MODE

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

SANITARY HOT WATER MODE

18 CORRECTION FACTORS FOR USE OF GLYCOL

Glycol rate Freezing point (°C) CCF IPCF WFCF PDCF

10% -3,2 0,985 1 1,02 1,08
20% -7,8 0,98 0,99 1,05 1,12
30% -14,1 0,97 0,98 1,10 1,22
40% -22,3 0,965 0,97 1,14 1,25
50% -33,8 0,955 0,965 1,2 1,33

CCF: Capacity correction factor
IPCF: Input power correction factor
WFCF: Water flow rate correction factor
PDCF: Pressure drops correction factor

The water flow rate and pressure drop correction factors are to be applied directly to the values given for operation without
glycol. The water flow rate correction factor is calculated in order to get the same temperature’s difference that would be
obtained without glycol. The pressure drops’ correction factor takes into account the different water flow rate obtained from the
application of the water flow rate correction factor.

32

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

19 DIMENSIONS

19.1 MODELS UM / UM Plus 06

IN/OUT: 1”M

19.2 MODELS UM / UM Plus 08

IN/OUT: 1”M

33

19.3 MODELS UM / UM Plus 12-16

IN/OUT: 1”M

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

34

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

20 WIRING DIAGRAMS

20.1 MODELS UM / UM Plus 06-08

Heat Sink

Temp Sensor

35

20.2 MODELS UM / UM Plus 12

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

36

Heat Sink

Temp Sensor

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

20.3 MODEL UM / UM Plus 16

DC2-

DC1-

DC-

DC2+

DC1+

DC+

20A 5mH

Reactor

CN607

CN604

Heat Sink

Temp Sensor

37

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

21 REMOTE CONTROL (OPTIONAL ACCESSORY)

The Remote Control allows you to set the operating mode of the chiller and fan coils units connected to a RS485 network. The
network can consist of up to 5 chillers in cascade and fan coils up to 70 units in 9 heating zones. The keyboard can be fitted onto
the E503 built-in wall boxes.

21.1 CONNECTION OF THE REMOTE CONTROL TO THE MINICHILLER

5: to connect to the reference GNDR terminal of the output terminal block of the unit;
6: to connect to R- output terminal of the output terminal block of the unit;
7: to connect to R+ output terminal of the output terminal block of the unit;
8: to connect to 12V- output terminal of the output terminal block of the unit;
9: to connect to 12V+ output terminal of the output terminal block of the unit.

For more informations, please see the manual of the remote control device.

38

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

22 HYDRAULICS DIAGRAM TYPE

WALL

BOILER

KIT RDZ

TANK

STORAGE

RDZ

50

60

40

30

°C

0

20

10

50

60

40

30

°C

0
20
10

864

00

2

10

2

864
10

864

2

00

10

864

2

10

864

2

00

10

864

2

10

864

2

00

10

8

642
10

2

864

00

10

2

864
10

2

864

00

10

864

2

10

864

2

0

10

864

2

0

10

864

2

0

10

864

2

0

10

864

2

0

10

864

0

2

10

RDZ

DZ
R

Notes:

- solution with additional circulation pump

- boiler input from UM unit

- UM with integration logic setting and additional producer management

- storage tank acting as hydraulic separator

- domestic water shall be managed separately

39

UM / UM PLUS Chillers and inverter air / water heat pumps with axial fans

Diverting valve for DHW

WALL

BOILER

max 45°C

and DHW

Diverting valve for

system integration

limit for boiler temperature

Notes:

- solution with one circulation pump within the UM unit

- boiler input from UM unit

- condensation boiler setting between 35-45 °C

- UM with integration logic setting and additional producer management

- optional storage tank if there is enough water in the system return line

Tank

Storage

DHW sensor

300 liters

45 °C

temperature

recommended

Z
D

50

60

KIT RDZ

40

30

°C

0
20
10

Z
RD

water heaters

MACS 20 instantaneous

Users

R

50

60

40

30

°C

0
20
0
1

864

2

0

10

0

2

864

0

1

864

2

00

10

0
864

2

1

864

2

0

10

2

864

0

10

2

864

0

10

864

2

0

10

864

2

0

10

864

2

0

10

864

2

0

10

864

2

0

10

0

4

2

8

6

0

1

864

2

0

10

0

4

2

8

6

0

1

864

2

0

10

0
864

2

0

1

864

2

0

10

Z
RD

23 CONTROL LOGICS

For the control logics see the control manual.

40

bit.ly/rdzwebsite

12/2016

9120487.01