RDZ US FLOOR User manual

Chiller and Heat Pumps
US FLOOR / FLOOR-S
HP Split Unit Inverter
INSTALLATION / TECHNICAL MANUAL
Air to water heat pumps with high COP and HP inverter technology
9120488.02
12/2016
bit.ly/rdzwebsite

US FLOOR / FLOOR Minichiller inverter Duo
2
FLOOR/FLOOR-S
Internal Unit US 06-09-12-16 External Unit
00 10-2015
Rev 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
1AIM AND CONTENTS OF THIS MANUAL ............................................................................................................... 6
1.1 HOW TO KEEP THIS MANUAL...................................................................................................................................6
1.2 GRAPHIC SYMBOLS ..................................................................................................................................................6
2SAFETY LAWS ...................................................................................................................................................... 6
3PERMITTED USES................................................................................................................................................. 6
4GENERAL SAFETY GUIDELINES ............................................................................................................................. 7
4.1 HEALTH AND SAFETY OF WORKERS..........................................................................................................................7
4.2 PERSONAL PROTECTION EQUIPMENTS....................................................................................................................7
4.3 SAFETY SYMBOLS .....................................................................................................................................................7
4.4 REFRIGERANT SAFETY DATA SHEET.......................................................................................................................... 8
5GENERAL CHARACTERISTICS ................................................................................................................................ 9
5.1 MODELLI DISPONIBILI ..............................................................................................................................................9
5.2 MODEL FLOOR .........................................................................................................................................................9
5.3 MODELS FLOOR-S.....................................................................................................................................................9
6TECHNICAL CHARACTERISTICS ............................................................................................................................. 9
6.1 FRAME......................................................................................................................................................................9
6.2 REFRIGERANT CIRCUIT ...........................................................................................................................................10
6.3 COMPRESSORS.......................................................................................................................................................10
6.4 AIR SIDE EXCHANGERS ...........................................................................................................................................10
6.5 FANS.......................................................................................................................................................................10
6.6 USER HEAT EXCHANGERS.......................................................................................................................................10
6.7 ELECTRIC BOX.........................................................................................................................................................10
6.8 CONTROL SYSTEM..................................................................................................................................................10
6.9 MONITORING AND PROTECTION DEVICES.............................................................................................................10
6.10 HYDRAULIC CIRCUIT...............................................................................................................................................11
6.11 FAN SPEED CONTROLLER .......................................................................................................................................11
6.12 OPTIONAL ACCESSORIES ........................................................................................................................................11
7INSTALLATION................................................................................................................................................... 11
7.1 GENERALITY ...........................................................................................................................................................11
7.2 LIFTING AND HANDLING ........................................................................................................................................12
7.2.1 Indoor unit........................................................................................................................................................12
7.2.2 Outdoor unit.....................................................................................................................................................12
7.3 POSITIONING AND MINIMUM TECHNICAL CLEARANCES.......................................................................................13
7.3.1 Indoor unit........................................................................................................................................................13
7.3.2 Outdoor unit.....................................................................................................................................................13
7.4 HYDRAULIC CONNECTIONS....................................................................................................................................14
7.4.1 Hydraulic circuit................................................................................................................................................15
7.4.2 Connections positions.......................................................................................................................................16
7.4.2.1 Indoor unit..................................................................................................................................................16
7.4.2.2 Outdoor unit...............................................................................................................................................16
7.4.3 Drainage system connection ............................................................................................................................16
7.4.3.1 Indoor unit..................................................................................................................................................16
7.4.3.2 Outdoor unit...............................................................................................................................................17
7.4.4 Installation of the relief valve discharge pipe ..................................................................................................17
7.4.5 Plant circuit water charging .............................................................................................................................17
7.4.6 Discharging of the plant circuit ........................................................................................................................18
7.5 INDICATIVE DIAGRAMS OF THE PLANT CIRCUIT.....................................................................................................19
7.5.1 Standard schematic diagram of the plant........................................................................................................19
7.5.2 Schematic diagram of the plant with DHW recirculation ................................................................................20
7.5.3 Particular schematic diagram of the plant with hydraulic separator and mixing valve ..................................20

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7.5.4 Schema d'esempio RDZ per applicazioni in caldo/freddo con sistemi di ricambio aria/deumidificazione ......21
7.5.5 Schema generico RDZ per applicazioni con SOLARE.........................................................................................21
7.6 REFRIGERANT CONNECTIONS ................................................................................................................................22
7.6.1 Refrigerant diagram for models 06 and 09......................................................................................................23
7.6.2 Refrigerant diagram for models 12 and 16......................................................................................................23
7.7 ELECTRICAL CONNECTIONS....................................................................................................................................23
7.7.1 Indoor unit........................................................................................................................................................24
7.7.1.1 Terminal block connections .......................................................................................................................25
7.7.2 Outdoor unit.....................................................................................................................................................26
7.7.2.1 Terminal block connections .......................................................................................................................26
7.7.3 Wiring between indoor and outdoor units.......................................................................................................27
7.7.4 Removal of the front-right side panel of the outdoor unit models 12 and 16 .................................................28
7.7.5 Safety thermostats ...........................................................................................................................................28
8ARCHITETTURA DEL SISTEMA ............................................................................................................................ 29
9LAYOUT QUADRO ELETTRICO DELL’UNITA’ INTERNA ......................................................................................... 30
10 START UP .......................................................................................................................................................... 30
11 INDICATIONS FOR THE USER.............................................................................................................................. 31
12 SHUTDOWNS FOR LONG PERIODS ..................................................................................................................... 31
13 MAINTENANCE AND PERIODIC CHECKS ............................................................................................................. 31
13.1 ENVIRONMENTAL PROTECTION ............................................................................................................................32
14 WHEN THE UNIT GOES OUT OF SERVICE ............................................................................................................ 32
15 TECHNICAL DATA............................................................................................................................................... 33
15.1 PERFORMANCE DATA ............................................................................................................................................33
15.2 OUTDOOR UNITS....................................................................................................................................................33
15.3 INDOOR UNITS .......................................................................................................................................................34
15.3.1 Models FLOOR/FLOOR-S...................................................................................................................................34
16 ELECTRIC DATA.................................................................................................................................................. 35
16.1 MAXIMUM POWER CONSUMPTION/MAX. INPUT CURRENT OF THE INDOOR UNITS 06-09 .................................35
16.2 MAXIMUM POWER CONSUMPTION /MAXIMUM INPUT CURRENT OF THE INDOOR UNITS 12-16 ......................35
17 PUMPS PERFORMACE CURVES .......................................................................................................................... 35
18 CIRCULATOR PUMPS CURVES ............................................................................................................................ 36
19 READING OF THE INDOOR UNIT MANOMETERS................................................................................................. 36
20 DHW INSTANTANEOUS PREPARER .................................................................................................................... 37
21 SOLAR GROUP (MODELS FLOOR-S) .................................................................................................................... 38
21.1 CIRCULATOR CURVE...............................................................................................................................................39
21.2 CALIBRATION OF THE WATER FLOW BY USING THE FLOW CONTROLLER ..............................................................39
21.3 LOADING OF THE PLANT CIRCUIT...........................................................................................................................39
21.4 WASHING OF THE PLANT .......................................................................................................................................39
21.5 MAINTENANCE OF THE CIRCULATOR PUMP ..........................................................................................................40
21.6 FACTORY SETTINGS OF THE CIRCULATOR PUMP ...................................................................................................40
21.7 TECHNICAL CHARACTERISTICS ...............................................................................................................................40
22 OPTIONAL DHW TECHNICAL SIDE BOILER KIT..................................................................................................... 40
23 PERFORMANCE ................................................................................................................................................. 41
24 OPERATION LIMITS............................................................................................................................................ 43
24.1 EVAPORATOR WATER FLOW RATE ..................................................................................................................................43
24.2 CHILLED WATER PRODUCTION (SUMMER OPERATION) ......................................................................................................43

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24.3 HOT WATER PRODUCTION (WINTER OPERATION) .............................................................................................................43
24.4 AMBIENT AIR TEMPERATURE ........................................................................................................................................43
25 CORRECTION FACTORS FOR OPERAZIONI WITH GLYCOL .................................................................................... 44
26 DIMENSIONS ..................................................................................................................................................... 45
26.1 INDOOR UNITS .......................................................................................................................................................45
26.2 OUTDOOR UNITS....................................................................................................................................................45
27 ACCESS PROCEDURE TO INTERNAL PARTS ......................................................................................................... 46
27.1 INDOOR UNIT .........................................................................................................................................................46
27.2 OUTDOOR UNIT .....................................................................................................................................................46
28 COMPONENTS OF INDOOR AND OUTDOOR UNITS ............................................................................................ 47
28.1 INDOOR UNIT MODEL:FLOOR/FLOOR-S......................................................................................................................47
28.2 INDOOR UNIT TEMPERATURE SENSORS ...........................................................................................................................49
28.3 OUTDOOR UNIT .....................................................................................................................................................49
29 FILTER CLEANING............................................................................................................................................... 50
30 WIRING DIAGRAMS........................................................................................................................................... 50
30.1 INDOOR UNIT ELECTRIC PANEL LAYOUT ................................................................................................................50
30.2 SINGLE-PHASE INDOOR UNIT.................................................................................................................................51
30.3 OUTDOOR UNITS....................................................................................................................................................52
30.3.1 Mod. US 06 - 09................................................................................................................................................52
30.3.2 Mod. US 12 .......................................................................................................................................................53
30.3.3 Mod. US 16 .......................................................................................................................................................54
31 LIMITATION OF WARRANTY .............................................................................................................................. 55

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The US manual 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.
1AIM AND CONTENTS OF THIS MANUAL
This manual provides basic information as for the selection, installation, operation and maintenance of the US units. It is
addressed to the installer and the user of the unit: it allows operating this equipment efficiently, even if the user do not have any
previous specific knowledge of it.
This manual describes the characteristics of the equipment when it was 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.
The company introduces also technological improvements and is not constrained to update the manuals for previous versions of
appliances that could not be compatible. So make sure to use, for the installed unit, the supplied manual.
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. It indicates also general notes.
2SAFETY LAWS
The US units have been designed in compliance with the following Directives and Harmonized 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 Norm
•CEI EN 55014-1, CEI EN 55014-2, CEI EN 61000-3-2, CEI EN 61000-3-3, CEI EN 62233 Norms
3PERMITTED 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 and competent in the existing rules in the
country in which the appliance will be installed.

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4GENERAL SAFETY GUIDELINES
Before beginning to operate on US 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 supply is ‘ON’.
Do not pull, remove or twist the electrical cables coming out from the unit, even if it is disconnected from the main
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 materia
l
s (cardboard, staples, plastic bags,
etc.) as they may represent an environmental and life hazard.
Any routine and
/
or not-routine maintenance operation shall be carried out when the equipment has been shut down,
disconnected from electric and pneumatic power sources and after its pneumatic system has been discharged.
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 HEALTH AND SAFETY OF WORKERS
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 unauthorized 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 PROTECTION EQUIPMENTS
When operating and maintaining the US units, use the following personal protective equipment.
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 outdoor unit features the following safety signs, which has to be complied with:
General hazard
Electric shock hazard
Presence of moving organs
Presence of surfaces that may cause injures
Presence of hot surfaces which can cause burns

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4.4 REFRIGERANT SAFETY DATA SHEET
Name: R410A (50% Difluoromethane (R32); 50% Pentafluoroethane (R125).
RISKS IN DICATIONS
Major risks: Asphyxia
Specific risks: The rapid evaporation can cause freezing.
FIRST AID
General informations: Never give anything by mouth to an unconscious person.
Inhalation: Outdoors opens transport.
Use oxygen or artificial respiration if necessary.
Do not give 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 clothes.
FIRE PREVENTION
Extinguishing Media: Whatever.
Specifc risks: Increase in pressure.
Specifics methods: Use water spray to cool containers
MISURE IN CASO DI FUORIUSCITA ACCIDENTALE
Personal precautions: Evacuate personnel to safe areas.
Provide adequate ventilation.
Use personal protective equipment.
Environmental precautions: Evaporate.
Cleaning method: Evaporate.
MANIPULATION AND STORAGE
Manipulation
Action/technical precautions: Provide sufficient air exchange and/or exhaust in work rooms.
Recommendations for safe use: Do not breathe vapors or spray mist.
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 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: do not ignite.
Density: 1.08 kg/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.
The incompatibility is more serious if the metal is present in powder form or if the surfaces were, recently, unprotected.
Decomposition products These products are halogenated compounds, hydrogen fluoride, carbon oxides (CO, CO2), carbonyl halides.
Risks:
TOXICOLOGICAL INFORMATION
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.

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5GENERAL CHARACTERISTICS
5.1 MODELLI DISPONIBILI
•model FLOOR, 1-phase floor standing version, with technical water puffer tank in 190 L for DHW and technical water puffer
tank in 40 L for plant side
•model FLOOR-S, 1-phase floor standing unit, with technical water puffer tank in 190 L for DHW equipped with solar coil and
technical water puffer tank in 40 L for plant side.
5.2 MODEL FLOOR
As standard:
1) Puffer for technical water of 190 liters for DHW (domestic hot water) and plant technical puffer of 40 liters, with
polyurethane coating of 50 mm thick.
2) Circulator for the heat pump and the rapid preparer of high efficiency according to ErP directive up to values of EEI≤0.21.
3) Pump circulator and rapid preparer of high efficiency according to ErP up to the values EEI≤0,21.
4) Exchangers of the heat pump and of the DHW rapid producer in stainless steel AISI 304.
5) Integrated Y filter.
6) Tap of water charging/discharging for both DHW technical side and plant side.
7) Automatic air vent valves mounted on the plant side and on the DHW technic side.
8) Double manometer 6 bar to measure the water flow/load losses
9) Double expansion vessels of 8 liters, one on the plant circuit side and the other on DHW technic side
10) 3 bar pressure relief valve to be connected with to a collecting system
11) Flow switch for heat exchanger protection
12) Flowmeter for managing the rapid production of DHW
13) Single or three phase electric power supply
14) Electric heater controller logic for plant side in integration and/or substitution
15) Controller logic for boiler or similar source for both plant and DHW technical sides in integration and/or substitution of
the heat pump (digital contact)
16) Integrated climatic system for plant
17) Controller logic for plant remote sensor
18) Integrated controller logic for double set-point of plant side
19) Integrated controller logic for intelligent energy resources
20) Integrable with HNSBox System
Accessories:
1) Mixer’s controller logic for plant side in both heating and cooling operations. controller logic for solar integration.
Controller logic for relaunching circulator (secondary) plant side (optional kit, installed in the factory mod. GI2)
5.3 MODELS FLOOR-S
In addition to the above indicated characteristics:
1) GI2 module for solar integration management logic. Management logic of the relaunching circulator (secondary) plant-
side. Mixing management logic for plant-side for both heating and cooling..
2) Integration and management of solar DHW technical-side equipped with modulating High efficiency circulator according
to ERP Directive with EEi ≤0.21.
3) Flow regulator 2÷12 l/min
4) Compact safety group with safety valve and pressure gauge.
5) Integrated ball valve with thermometer and check valve.
6) Temperature sensors DHW storage technical-side and solar collectors.
7) Expansion vessel not included to be installed externally.
6TECHNICAL CHARACTERISTICS
The reversible heat pumps US 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 63°C using the electric
heaters for environmental heating and sanitary applications.
The new US system, which is the result of the evolution of the previous model, is the ideal solution for the total home climate
control (with the accessories Evo Touch (unscheduled) and HNS Box). For new or already existing house if equipped with a radiant
floor or fan coil as heating system, with feeding from electric power network and a renewable energy sources.
The INVERTER compressor with brushless DC motor technology, matched with electronic expansion valve, pump and variable
speed blower always with brushless motor, as well as the integrated circulators, optimize the power consumption and the
operation efficiency of the refrigerating components and of the entire system.
6.1 FRAME
All US units are made up of hot-galvanized 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 stainless steel. The indoor units also have a self-supporting structure made of galvanized steel with
removable painted panels.