RDZ Unica 200 Technical document

Chiller and Heat pumps
UNICA 200/300
Standard - S1 - S2
TECHNICAL / INSTALLATION MANUAL
Domestic Hot Water heat pump with range from 200 to 300 litres
FAG0FA000BZ.00
03/2018
bit.ly/rdzwebsite

UNICA Sanitary water heat pump
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SANITARY WATER HEAT PUMP WITH WATER TANK
USER-INSTALLER MANUAL
Models
UNICA 200 Standard – S1 – S2
UNICA 300 Standard – S1 – S2
This manual has been created for informative purpose. The company declines any responsibility for the results of any projecting or any installation based on the explanations and/or on the technical specifications
provided in this manual. It is besides forbidden the reproduction under any form of the texts and of the figures contained in this manual.
"This manual is a translation from the official italian language version. For reasons of environmental respect the Company will not provide the hard copy in the original language which could be directly requested or
downloaded from the Company website at any time. In case of any dispute, the original language manual will be the trusted one".
09 10-2017 Adding of the anti-legionella cycle specifications and upgrading of the conformity.
Date Notes
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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INDEX
1PURPOSES AND CONTENTS OF THIS MANUAL..................................................................................................................... 4
1.1 HOW TO KEEP THIS MANUAL ................................................................................................................................................. 4
1.2 GRAPHIC SYMBOLS USED IN THE MANUAL ............................................................................................................................ 4
2SAFETY LAWS..................................................................................................................................................................... 4
3PERMITTED USE ................................................................................................................................................................. 4
4GENERAL SAFETY GUIDELINES ............................................................................................................................................ 5
4.1 WORKERS’ HEALTH AND SAFETY ............................................................................................................................................ 5
4.2 PERSONAL SAFETY EQUIPMENTS ........................................................................................................................................... 5
4.3 SAFETY SYMBOLS ................................................................................................................................................................... 5
4.4 REFRIGERANT SAFETY DATA SHEET........................................................................................................................................ 6
5GENERAL CHARACTERISTICS ............................................................................................................................................... 7
5.1 FLEXIBILITY AND BENEFITS OF UNICA INSTALLATION............................................................................................................. 7
5.2 COMPACT DESIGN.................................................................................................................................................................. 7
5.3 AVAILABLE MODELS ............................................................................................................................................................... 8
5.4 AVAILABLE OPTIONALS .......................................................................................................................................................... 8
6TECHNICAL FEATURES ........................................................................................................................................................ 8
7ITEMS INSIDE PRODUCT BOX.............................................................................................................................................. 8
8OVERVIEW OF THE UNIT..................................................................................................................................................... 9
8.1 PARTS AND DESCRIPTIONS..................................................................................................................................................... 9
8.2 DIMENSIONS ........................................................................................................................................................................ 10
8.3 HOLES FOR CABLES............................................................................................................................................................... 12
8.4 HOW TO REPLACE THE MAGNESIUM STICK.......................................................................................................................... 12
8.5 REGULATION THERMOSTAT OF THE ELECTRIC HEATER........................................................................................................ 12
8.6 SCHEMATIC OVERVIEW OF THE WATER AND GAS CIRCUIT .................................................................................................. 13
8.7 SCHEMATIC OVERVIEW OF THE GAS CIRCUIT....................................................................................................................... 13
9INSTALLATION...................................................................................................................................................................13
9.1 GENERALITY ......................................................................................................................................................................... 13
9.2 SAFETY INSTRUCTIONS......................................................................................................................................................... 14
9.2.1 Warning........................................................................................................................................................................ 14
9.2.2 Caution ......................................................................................................................................................................... 14
9.3 TRANSPORTATION ............................................................................................................................................................... 14
9.3.1 Transport using a forklift.............................................................................................................................................. 14
9.3.2 Manual transport ......................................................................................................................................................... 15
9.4 REQUIRED SERVICE SPACE.................................................................................................................................................... 15
9.5 INSTALLATION OVERVIEW ................................................................................................................................................... 16
9.6 HYDRAULIC CONNECTIONS .................................................................................................................................................. 17
9.6.1 Water connections ....................................................................................................................................................... 17
9.6.2 Water loading............................................................................................................................................................... 17
9.6.3 Water emptying ........................................................................................................................................................... 18
9.6.4 Installation of an external re-circulation pump and flow switch.................................................................................. 18
9.6.5 Connection of an auxiliary heat source ........................................................................................................................ 19
9.7 ELECTRICAL CONNECTIONS.................................................................................................................................................. 20
10 START UP ..........................................................................................................................................................................20
11 OPERATION THE UNIT .......................................................................................................................................................21
11.1 USER INTERFACE .................................................................................................................................................................. 21
11.2 OPERATIONS ........................................................................................................................................................................ 21
11.3 LCD ICONS .............................................................................................................................................................................. 24
11.4 MAIN LOGICS........................................................................................................................................................................ 24
11.4.1 Water temperature difference for compressor starting............................................................................................... 24

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11.4.2 External pump .............................................................................................................................................................. 25
11.4.3 Flow switch................................................................................................................................................................... 25
11.4.4 Thermal protections ..................................................................................................................................................... 25
11.4.5 Disinfection weekly cycle.............................................................................................................................................. 25
11.4.6 Electrical heater............................................................................................................................................................ 26
11.4.7 ON/OFF contact............................................................................................................................................................ 27
11.4.8 Contact for photovoltaic plant integration................................................................................................................... 27
11.5 PARAMETER CHECKING AND ADJUSTMENT......................................................................................................................... 27
11.6 MALFUNCTIONING OF THE UNIT AND ERROR CODES .......................................................................................................... 28
12 MAINTENANCE AND PERIODICAL CONTROLS.....................................................................................................................29
12.1 ENVIRONMENTAL PROTECTION........................................................................................................................................... 30
13 TROUBLESHOOTING ..........................................................................................................................................................30
14 WHEN THE UNIT GOES OUT OF SERVICE ............................................................................................................................30
15 DISPOSAL REQUIREMENTS ................................................................................................................................................30
16 TECHNICAL CHARACTERISTICS ...........................................................................................................................................31
17 PERFORMANCE .................................................................................................................................................................32
18 WORKING LIMITS OF HEAT PUMP .....................................................................................................................................33
19 WIRING DIAGRAM ............................................................................................................................................................34
19.1 STANDARD CONNECTION..................................................................................................................................................... 34
19.2 CONNECTION OF AN AUXILIARY HEAT SOURCE.................................................................................................................... 35
19.3 CONNECTION OF AN AUXILIARY HEAT SOURCE BY MEANS OF AN EXTERNAL SWITCH ........................................................ 36
20 WARRANTY CONDITIONS ..................................................................................................................................................37

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The UNICA manual contains all the necessary information for the better use of the equipment under safety conditions for the
operator.
1PURPOSES AND CONTENTS OF THIS MANUAL
This manual provides basic information as for the installation, the operation and the maintenance of UNICA 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 it is being put on the market; therefore, it may not capture
later technological improvements introduced 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 assumes no responsibility for any inaccuracies in the manual, if due to printing or transcription.
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 USED IN THE MANUAL
Indicates operations that can be dangerous for people and/or disrupt 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. It indicates also general notes.
2SAFETY LAWS
UNICA units have been designed in compliance with the following Directives and Harmonised Norms:
•Community Directives: 2014/30/UE, 2014/35/UE;
•Norms: EMC 2004/108/EC; IEC 60335-2-21; IEC 60335-2-40; EN 55014-1; EN 61000-3-2; EN 61000-3-11;
3PERMITTED USE
•The company excludes any contractual and no-contractual liability for damage caused to persons, animals or things, by
incorrect installation, adjustment and maintenance, improper use or a partial or superficial reading of the informations
contained in this manual.
•These units have been designed for water heating. A different application, unless expressly authorized by the manufacturer, is
to be considered improper and therefore not allowed.
•The location and the hydraulic and electric plant should be determined by the system designer and must take into account
both the purely technical needs as any applicable local legislations and specific authorizations.
•The execution of all work must be performed by qualified and experienced personnel, competent in the existing rules in
different countries

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4GENERAL SAFETY GUIDELINES
Before beginning to operate on UNICA 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.
Do not remove the grills on the fan outlet and top cover.
It’ forbidden the use by children and unassisted disabled persons.
Do not touch the appliance when barefoot or with wet or damp parts of the body.
Do not pull, detach or twist the electrical cables coming from the unit, even if it is disconnected from the mains
supply.
Do not stand with your feet on the device, sit down and/or lean on any type of object.
Do not spray or pour water directly on the device.
Not dispose of, abandon or leave within reach of children packaging materials (cardboard, staples, plastic bags,
etc.). because it can be a potential source of danger.
Any routine or not-routine maintenance operation shall be carried out when the equipment has been shut down,
disconnected from electric power sources.
The plastic cover can be removed only by qualified operators.
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 has 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.
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 workers respect them:
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 UNICA units, use the following personal protective equipments.
Protective clothing: Maintenance men and operators has 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

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4.4 REFRIGERANT SAFETY DATA SHEET
Name: R134a (100% ,1,1,2-Tetrafluoroethane).
RISK INDICATIONS
Major risks: Asphyxia.
Specific risks: The rapid evaporation may cause freezing.
It can cause cardiac arrhythmia.
FIRST AID
General informations: 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
Special protective equipments: Use breathing apparatus in confined spaces.
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
actions/technical precautions: Provide sufficient air exchange and/or suction in workplaces.
Recommendations for safe use: Do not breathe vapors or aerosol.
Do not apply any testing pressure with air/HFC-134a mixtures. It may form with the air a fuel mixture at pressures greater than atmospheric
greater than atmospheric pressure when the volume ratio exceeds 60%.
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) = 1000 ml/m3.
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: Total safety glasses.
Protection of hands: Rubber gloves.
Hygiene measures: Do not smoke.
PHYSICAL AND CHEMICAL PROPERTIES
Colour: Colourless liquefied gas.
Odor: Similar to ether.
Boiling point: -26.5°C at atmospheric pressure.
Lighting point: It does not ignite.
Density: 1.21 kg/l at 25°C.
Solubility in water (wt %): 0.15
STABILITY AND REACTIVITY
Stability: No reactivity when used with the appropriate instructions.
Materials to avoid: Alkali metals, alkaline earth metals, powdered metals, metal salts.
Dangerous decomposition products: Halogen acids, carbon dioxide (CO2), carbon monoxide, fluorocarbons, carbonyl halides.
Dangerous reactions: The product is not flammable in contact with air under ambient conditions of temperature and pressure. When pressurized with air or oxygen
the mixture may become flammable. Certain mixtures of HCFCs or HFCs with chlorine may become flammable or reactive under certain conditions.
TOXICOLOGICAL INFORMATION
Acute toxicity: LC50/ inhalation /4 hours/on rat >2085 mg/m3
Local effects: Concentrations substantially above the TLV (1000 ppm) may cause narcotic effects.
Inhalation of decomposed products at high concentrations may cause respiratory failure (pulmonary edema).
Long term toxicity: Did not show carcinogenic, teratogenic or mutagenic effects in animal experiments. It can cause cardiac arrhythmia.
Threshold limit for the cardiac sensitivity: 312975 mg/m3. Threshold limit for the anesthetic effects: 834600 mg/m3.
ECOLOGICAL INFORMATION
Global warming potential 1430
GWP (R744=1):
Potential depletion 0
Ozone ODP (R11=1):
Disposal considerations: usable with reconditioning.

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5GENERAL CHARACTERISTICS
The hot water heat pump is one of the most economical systems to heat the water for family domestic use or for small business
activities. Using free renewable energy from the air, the unit is highly efficient with low running costs. Its efficiency can be up to
3~4 times more than conventional gas boilers or electrical heaters.
5.1 FLEXIBILITY AND BENEFITS OF UNICA INSTALLATION
Waste heat recovery: the unit can be installed near the kitchen, in the boiler-room or the garage, basically in every room which
has a large number of waste-heat so that it has the higher energy efficiency even with very low outside temperatures during the
winter.
Hot water and dehumidification: the unit can be placed in the laundry room or clothing room. When it produces hot water it
lowers the temperature and dehumidifies the room as well.
Storage room cooling: the unit can be placed in the storage room as the low temperature helps to keep the food fresh.
Hot water and fresh air ventilation: the unit can be placed in the garage, gym, basement etc. When it produces hot water, it cools
the room and supplies fresh air.
Compatible with different energy sources: the unit can work with a second heat source as solar panels, external heat pumps,
boilers or other different energy sources (remark: the extra heat source is not provided with).
Ecological and economical heating: the unit is one of the most efficient and economical alternatives to both fossil fuel boilers and
heating systems. By making use of the renewable source in the air, it consumes much less energy.
Multiple functions: the special design of the air inlet and outlet makes the unit suitable for various ways of connections. With
different ways of installation, the unit can work as just a heat pump but also as a fresh air blower, a dehumidifier, or an energy
recovery device.
The function for which the unit has been designed is only that of heat pump for DHW production. Any other side
effect (ambient cooling, dehumidification, waste heat recovery) should be considered as a perk, on which you can
not have however precise control. The performance data will therefore be provided only with respect to the
function of water heating.
5.2 COMPACT DESIGN
The unit is especially designed for offering sanitary hot water for family use. Its extremely compact structure and elegant design
are suitable for indoor installation.

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5.3 AVAILABLE MODELS
To adapt to different installation requirements, the UNICA unit is available in 3 versions:
•UNICA Standard: standard that provides the heat pump and the electric heater as heating sources;
•UNICA S1: with auxiliary coil for use in combination with solar panels;
•UNICA S2: with double auxiliary coil in order to have at the same time three energy sources.
5.4 AVAILABLE OPTIONALS
The optionals are available only for UNICA S1 and UNICA S2 models and they are necessary to manage solar integration or hot
sanitary water re-circulation:
•ONE-FL: 1”F flow switch;
•ONE-SAS: temperature probe with 5 m cable.
6TECHNICAL FEATURES
Steel tank with double layer vitrification.
Anti-corrosion magnesium stick for assuring the durability of the tank.
Condenser wrapped externally to the boiler, free from fouling and gas-water contamination.
High thickness polyurethane foam (PU) thermal insulation (42 mm).
Outer shell made of grey colour RAL 9006 plastic material.
Acoustically isolated top part plastic cover.
Highly efficient compressor with the R134a refrigerant.
High and low gas pressure protections.
Electrical heater available in the unit as a back-up (with integrated thermo cut out with protection set at 90°C), assuring
constant hot water even in extreme cold winters.
ON-OFF contact for starting the unit from an external switch.
Weekly disinfection cycle.
Possibility of manage hot sanitary water re-circulation or solar water integration (presence of a dedicated temperature
probe, flow switch input and command for an external pump).
7ITEMS INSIDE PRODUCT BOX
Before starting the installation, please make sure that all parts are found inside the box.
The Unit Box
Item Image Quantity
Domestic hot water heat
pump 1
Operation and Installation
Manual
1
Acoutically isolated
plastic cover