Rotex RKHH2E200AAV33 User manual

Installation Manual
Installation manual
Domestic Hot Water Heat Pump - Monobloc type
RKHH2E200AAV33
RKHH2E260AAV33
RKHH2E260PAAV33
Domestic Hot Water Heat Pump
Monobloc type
English

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 3

Installation Manual
4
RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Table of contents
1Generalsafetyprecautions ..........5
1.1 About the documentation .........................5
1.1.1 Meaning of warnings and symbols5
1.2 For the user.............................................5
1.3 For the installer........................................6
1.3.1 General......................................6
1.3.2 Installation site............................6
1.3.3 Refrigerant .................................7
1.3.4 Water.....................................7
1.3.5 Electrical ....................................8
1.4 Glossary .................................................9
2 Introduction................................ 10
2.1 Units.....................................................10
2.2 Disclaimer.............................................10
2.3 Copyright..............................................10
2.4 Operating principle.................................10
2.5 Available versions and configurations......11
3 Handlingandtransport...............11
4 Constructioncharacteristics.......13
4.1 Technical characteristics........................14
5 Importantinformation.................16
5.1 Conformity with European regulations.....16
5.2 Degrees of protection provided by
enclosures........................................16
5.3 Limitations of use...................................16
5.4 Operating limits .....................................16
5.5 Fundamental safety rules.......................16
5.6 Information on coolant used....................16
6 Installationand connections....... 17
6.1 Preparation of the installation site............17
6.2 Ventilation connection............................17
6.2.1 Particular installation conditions..18
6.3 Device mounting and connection............19
6.4Water supply connections ......................19
6.4.1 Condense drain connections......20
6.5 Solar power system integration...............21
6.6 Electrical connections ............................22
6.6.1 Remote links.............................22
6.7Wiring diagram......................................23
7 Commissioning.......................23
8 Operationanduse......................24
8.1 The User Interface.................................24
8.1.1 Interface keys and display .........24
8.1.2. Operating logic.........................25
8.1.3 Basic management...................25
8.2 Particular operations..............................31
8.2.1 List of equipment parameters.....32
9 Maintenanceandcleaning.......... 36
9.1 Resetting of safety equipment.................36
9.2 Quarterly inspections .............................37
9.3 Annual inspections.................................37
9.4 Cleaning of the ventilation filter ...............37
9.5 Magnesium anodes ...............................37
9.6 Emptying the boiler................................37
10 Troubleshooting.................... 38
11 Disposal ................................. 38
12. Unit Fiche ...................................39

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 5
1 General safety
precautions
1.1 About the documentation
•The original documentation was written in English.
All other languages are translations.
•The precautions described in this document cover
very important topics, follow them carefully.
•The installation of the system and all activities
described in the installation manual must be
performed by an authorized installer.
1.1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in serious
injury or death.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in
electrocution.
DANGER: RISK OF BURNING
Indicates a situation that could result in
burning because of extreme hot or cold
temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in
explosion.
WARNING
Indicates a situation that could result in
serious injury or death.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor
or moderate injury.
NOTICE
Indicates a situation that could result in
equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
Symbol
Explanation
Before installation, read the installation
and operation manual, and the
wiring instruction sheet.
Before performing maintenance and
service tasks, read the service
manual.
For more information, see the installer
and user reference guide.
1.2 For the user
•If you are not sure how to operate the unit, contact
yourinstaller.
•This appliance can be used by children aged 8
years or older and by people with reduced
physical, sensory or mental capabilities or lack of
experience and knowledge, if they are supervised
or have received sufficient instructions concerning
safe use of the appliance and they understand the
hazards involved. Children must not play with the
appliance. Cleaning and user maintenance must
not be carried out by children without supervision.
WARNING
To prevent electric shocks or fire:
- Do NOT rinse the unit.
- Do NOT operate the unit with wet hands.
- Do NOT place any objects containing
water on the unit.
NOTICE
- Do NOT place any objects or equipment
on top of the unit.
- Do NOT sit, climb or stand on the unit.
- Units are marked with the following symbol:
This means that electrical and electronic units must not
be mixed with unsorted household waste. Do NOT
try to dismantle the system yourself: the
dismantling of the system, treatment of the
refrigerant, of oil and of other parts must be carried
out by an authorized installer and must comply
with applicable legislation.
Units must be treated at a specialized treatment facility
for reuse, recycling and recovery. By ensuring this
unit is disposed of correctly, you will help to
prevent potential negative consequences for the
environment and human health. For more
information, contact your installer or local authority.

Installation Manual
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RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
1.3 For the installer
1.3.1 General
If you are not sure how to install or operate the unit,
contact your dealer.
NOTICE
Improper installation or attachment of
equipment or accessories can result in
electric shock, short-circuit, leaks, fire or
other damage to the equipment. Only use
accessories, optional equipment and
spare parts made or approved by Daikin.
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (in addition
to the instructions described intheDaikin
documentation).
CAUTION
Wear adequate personal protective
equipment (protective gloves, safety
glasses, …) when installing, maintaining
or servicing the system.
DANGER: RISK OF BURNING
•Do NOT touch the refrigerant piping,
water piping or internal parts during and
immediately after operation. These may
be too hot or too cold. Wait for the parts
to return to their normal temperature. If
you need to touch them anyway, wear
protectivegloves.
•Do NOT touch any accidental leaking
refrigerant.
WARNING
Provide adequate measures to prevent the unit
from being used as a shelter by small animals.
Small animals that come into contact with
electrical parts can cause malfunctions, smoke
or fire.
CAUTION
Do NOT touch the air inlet or aluminium fins
of the unit.
NOTICE
•Do NOT place any objects or equipment
on top of the unit.
•Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are
preferably carried out under dry weather
conditions to avoid water ingress.
In accordance with the applicable legislation, it may be
necessary to provide a logbook with the unit
containing at least: information on maintenance,
repair work, results of tests, stand-by periods, …
Also, following information (at least) must appear on the
unit where it can be read:
•Instructions for shutting down the system in case
of an emergency
•Name and address of fire department, police and
hospital
•Name, address and day and night telephone
numbers for obtaining service
In Europe, EN378 provides the necessary guidance for
this logbook.
1.3.2 Installation site
•Provide sufficient space around the unit for
servicing and air circulation.
•Make sure the installation site withstands the unit's
weight and vibration.
•Make sure the area is well ventilated. Do NOT
block any ventilation openings.
•Make sure the unit is level.
Do NOT install the unit in the following places:
•Potentially explosive atmospheres.
•In areas with machinery that emits
electromagnetic waves. Electromagnetic waves
may disturb the control system and cause the
equipment to malfunction.
•In areas with a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline),
carbon fibre, ignitable dust.
•In areas where corrosive gas (such as sulphurous
acid gas) is produced. Corrosion of copper pipes
or soldered parts may cause the refrigerant to
leak.

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 7
1.3.3 Refrigerant
If applicable. Consult the installation manual of your
application for more information.
WARNING
During tests, NEVER pressurize the unit with
a pressure higher than the allowed
maximum (as indicated on the nameplate
of the unit).
WARNING
Take sufficient precautions in case of
refrigerant leakage. If refrigerant gas
leaks, ventilate the area immediately.
Possible risks:
•Excessive refrigerant concentrations in a
closed room can lead to oxygen
deficiency.
•Toxic gas may be produced when
refrigerant gas comes into contact with
fire.
DANGER: RISK OF EXPLOSION
Pump-down –Refrigerant leakage. If you
want to pump-down the system, and
there is a leakage in the refrigerant
circuit:
•Do NOT use the unit's automatic pump-
down function, with which you can collect
all refrigerant from the system in the
outdoor unit. Possible consequence:
Self-combustion and explosion of the
compressor because of air entering the
operating compressor.
•Use a separate recovery system to
ensure that the unit's compressor does
NOT need to operate.
WARNING
Always recover the refrigerant. Do NOT throw
it out directly into the environment. Use a
vacuum pump to evacuate the
installation.
NOTICE
•To avoid compressor breakdown, do
NOT charge more than the specified
amount of refrigerant.
•When the refrigerant system needs to be
opened, refrigerant must be treated
according to the applicable legislation.
WARNING
Make sure there is no oxygen in the system.
Refrigerant may only be charged after
performing the leak test and the vacuum
drying.
•In case re-charge is required, consult the
nameplate of the unit. It mentions the type of
refrigerant and required amount.
•The unit is factory charged with refrigerant.
•Only use tools allowed for the refrigerant type
used in the system, this to ensure pressure
resistance and prevent foreign materials from
entering into the system.
•Charge the liquid refrigerant as follows:
If
Then
A siphon tube is present
(i.e. the cylinder is
marked with "Liquid
filling siphon attached")
Charge with the cylinder
upright.
A siphon tube is NOT
present
Charge with the cylinder
upside down.
•Open refrigerant cylinders slowly.
•Charge the refrigerant in liquid form. Adding it in
gas form may prevent the unit from normal
operation.
CAUTION
When the refrigerant charging procedure is
done or when pausing, close the valve of
the refrigerant tank immediately. If the
valve is not closed immediately,
remaining pressure might charge
additional refrigerant. Possible
consequence: Incorrect refrigerant
amount.
1.3.4 Water
If applicable. Consult the installation manual of your
application for more information.
NOTICE
Make sure water quality complies with EU
directive 98/83 EC.

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RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
1.3.5 Electrical
DANGER: RISK OF ELECTROCUTION
•Turn OFF all power supply before
removing the switch box cover,
connecting electrical wiring or touching
electrical parts.
•Disconnect the power supply for more
than 1 minute and measure the voltage
at the terminals of main circuit capacitors
or electrical components before
servicing. The voltage MUST be less
than 50 V DC before you touch electrical
components. For the location of the
terminals, consult the wiring diagram.
•Do NOT touch electrical components
with wet hands.
•Do NOT leave the unit unattended when
the service cover is removed.
WARNING
If NOT factory installed, a main switch or
other means for disconnection, having a
contact separation in all poles providing
full disconnection under overvoltage
category III condition, shall be installed in
the fixed wiring.
WARNING
•ONLY use copper wires.
•Make sure the field wiring complies with
the applicable legislation.
•All field wiring must be performed in
accordance with the wiring diagram
provided with the unit.
•NEVER squeeze bundled cables and
make sure they do not come into contact
with the piping or sharp edges. Make
sure no external pressure is applied to
the terminal connections.
•Make sure to install earth wiring. Do NOT
earth the unit to a utility pipe, surge
absorber, or telephone earth. Incomplete
earth may cause electrical shock.
•Make sure to use a dedicated power
circuit. NEVER use a power supply
shared by another appliance.
•Make sure to install the required fuses or
circuit breakers;
•Make sure to install an earth leakage
protector. Failure to do so may cause
electric shock or fire.
•When installing the earth leakage
protector, make sure it is compatible with
the inverter (resistant to high frequency
electric noise) to avoid unnecessary
opening of the earth leakage protector.
NOTICE
Precautions when laying power wiring:
•Do not connect wiring of different
thicknesses to the power terminal block
(slack in the power wiring may cause
abnormal heat).
•When connecting wiring which is the
same thickness, do as shown in the
figure below.
•For wiring, use the designated power
wire and connect firmly, then secure to
prevent outside pressure from being
exerted on the terminal board.
•Use an appropriate screwdriver for
tightening the terminal screws. A
screwdriver with a small head will
damage the head and make proper
tightening impossible.
•Over-tightening the terminal screws may
break them.
Install power cables at least 1 metre away from
televisions or radios to prevent interference.
Depending on the radio waves, a distance of 1
metre may not be sufficient.
WARNING
•After finishing the electrical work, confirm
that each electrical component and
terminal inside the electrical components
box is connected securely.
•Make sure all covers are closed before
starting the unit.

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 9
1.4 Glossary
Dealer
Sales distributor for the unit.
Authorized installer
Technical skilled person who is qualified to install the
unit.
User
Person who is owner of the unit and/or operates the
unit.
Applicable legislation
All international, European, national and local
directives, laws, regulations and/or codes that
are relevant and applicable to a certain unit or
domain.
Service company
Qualified company which can perform or coordinate
the required service to the unit.
Installation manual
Instruction manual designed for a certain unit or
application, explaining how to install, configure
and maintain it.
Operation manual
Instruction manual designed for a certain unit or
application, explaining how to operate it.
Accessories
Labels, manuals, information sheets and equipment
that are provided with the unit and need to be
installed according to the instructions in the
accompanying documentation.
Optional equipment
Equipment made or approved by Daikin that can be
combined with the unit according to the
instructions in the accompanying documentation.
Field supply
Equipment not made by Daikin that can be combined
with the unit according to the instructions in the
accompanying documentation.

Installation Manual
10
RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
2 Introduction
This installation and maintenance manual is to be
considered an integral part of the present heat
pump (hereafter referred to as equipment).
The manual must be kept for future reference until the
heat pump itself has been dismantled. This manual
is intended for both the specialised installer
(installers –maintenance technicians) as well as
for the end user. It includes descriptions of the
installation modes to be complied with in order to
achieve a correct and safe operation of the
equipment, as well as methods of use and
maintenance.
This manual must accompany the equipment to its new
destination in case of sale or change of owner of
the equipment.
Before installing and/or using the equipment, read this
instruction manual carefully and pay attention to
chapter 0 (regarding safety) in particular.
The manual must be kept together with the equipment
and, in any case, it must always be at the disposal
of the qualified personnel in charge of installation
and maintenance.
The following symbols are used in the manual, to
ensure that you can rapidly find the most important
information:
Information on safety
Procedures to follow
Information/ Suggestions
2.1 Units
Dear Customer,
Thank you for purchasing this unit.
Our company has always paid a great deal of attention
to environmental problems and therefore uses
technologies and materials with a low
environmental impact to manufacture its units in
conformity with RAEE 2012/19/UE and RoHS
2011/65/UE community standards.
2.2 Disclaimer
The conformity of the content of these user instructions
with hardware and software has been submitted to
thorough verification. Regardless of this, it is still
possible for some non-compliances to occur;
therefore, no liability will be assumed for complete
conformity.
In the interest of achieving technical perfection, we
reserve the right to carry out modifications to the
equipment construction or to data at any time
whatsoever. We therefore do not accept any
liability claims whatsoever attributable to
instructions, figures, drawings or descriptions,
without prejudice to errors of any kind.
The Supplier shall not be held responsible for damages
attributable to misuse, improper use, or as a
consequence of unauthorised repairs or
modifications.
WARNING!
The equipment can be used by children aged
8 years or older as well as by people with
reduced physical, sensory or mental
abilities or by those who lack the
necessary experience or knowledge, if
they are supervised or after they have
received instructions relating to the safe
use of the equipment as well as
explanations relating to the use of such
equipment.
Children must not play with the equipment.
Cleaning and maintenance intended to be
carried out by the user must not be
performed by unsupervised children.
2.3 Copyright
These user instructions contain information protected
by copyright. It is forbidden to photocopy, duplicate,
translate or record these user instructions on
memory equipment, either in whole or in part,
without prior authorisation of Daikin. Any breaches
shall be subject to the payment of compensation
for any damage caused. All rights are reserved,
including those deriving from the issuing of patents
or the registration of utility models.
2.4 Operating principle
The equipment belonging to the 1.9 kW and 2.9 kW
series can produce domestic hot water and does
so mainly by using heat pump technology. A heat
pump can transfer thermal energy from a low
temperature source to one with a higher
temperature and vice versa (heat exchangers).
The equipment uses a water circuit consisting of a
compressor, an evaporator, a condenser and a
lamination valve; a liquid/gas coolant flows inside
this circuit (see paragraph 4.6).
The compressor creates a difference in pressure inside
the circuit, which creates a thermodynamic cycle
allowing the coolant fluid to be sucked in through
an evaporator, where the fluid itself evaporates at a
low pressure by absorbing heat. Next, it is
compressed and driven towards the condenser
where the fluid condenses at a high pressure
releasing the absorbed heat. When the fluids
leaves the condenser, it passes through the so-
called “lamination valve”, where it vaporises as it
loses pressure and because of the temperature. It
then re-enters the evaporator and the cycle is
repeated.

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 11
Fig. 1 –Operating principle
The operating principle of the equipment (Fig. 1):
I-II: The coolant fluid sucked in by the compressor flows
inside the evaporator and while it evaporates, it
absorbs the “ecological” heat given by the air.
At the same time, the ambient air is sucked into the
equipment by a fan; the air loses its heat by
passing over the finned-tube battery of the
evaporator;
II-III: The coolant gas passes through the compressor
and it undergoes an increase in pressure that
causes the temperature to rise; transforming the
gas into superheated steam;
III-IV: Inside the condenser, the coolant gas releases its
heat to the water inside the tank (boiler). This
exchange process enables the coolant to transform
from superheated steam into a liquid by
condensing at a constant pressure and undergoing
a lowering in temperature;
IV-I: The liquid coolant passes through the lamination
valve, it undergoes a sudden drop in both pressure
and temperature and it partially evaporates
bringing pressure and temperature back to its initial
conditions. The thermodynamic cycle can begin.
2.5 Available versions and
configurations
The heat pump is available as a 1.9 kW, which can be
set up in different configurations, depending on the
possible integrations with other heating sources
(e.g. solar thermal, biomass power, etc.).
Version
Configuration description
RKHH2E200AAV33
RKHH2E260AAV33
Air source heat pump for
the production of
domestic hot water
RKHH2E260PAAV33
Air source heat pump for
the production of
domestic hot water
suitable for use with
the solar power
system.
3 Handling and transport
The equipment is supplied in a cardboard box. It is
fastened to a pallet with three screws.
Use a fork-lift truck or a pallet truck in order to unload
the equipment: it is opportune for these to have a
load capacity of at least 250 Kg.
In order to loosen the
fixing screws more
easily, you can put
the packaged
equipment on a
horizontal position
on its back side.
The unpacking
operations must be
carried out carefully
to not damage the
equipment
enclosure, if the
unpacking is
carried out with
knives or cutters to
open the cardboard
packaging.
After having removed the packaging, check whether the
unit is intact. If in doubt, do not use the equipment
and seek help from authorised technical staff.
In conformity with the environmental protection
regulations, you should make sure that all
accessories supplied have been removed before
discarding the packaging.
WARNING!
Packaging items (staples, cardboard boxed,
etc.) should not be left within reach of
children, as this can lead to dangerous
situations.
(*) Note: at Daikin’s discretion, the type of packaging
may be subject to change.
It is opportune to protect the equipment from
atmospheric agents as long as it remains idle,
waiting to be used.
Ecological heat
Condenser
Air
Evaporator
Compressor
Lamination
valve
Tank
Cold water
Hot water
Electric heat

Installation Manual
12
RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Positions permitted for transporting and handling:
WARNING!
During the unit handling and installation
stages, it is forbidden to put the upper
part of the device under any kind of stress
whatsoever due to the fact that it is not of
a structural nature.
WARNING!
The equipment can be transported
horizontally only during the last km,
following the instructions in the section
“Positions permitted for transporting and
handling” above and taking care of
positioning some supports on the lower
side of the boiler in order to not lean
against the upper part, which is not of a
structural nature. When transporting the
equipment horizontally, the display must
be facing up.
Positions that are not permitted for transporting and
handling purposes:
√
√

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 13
4 Construction characteristics
1
Heat pump.
2
Control panel.
3
Enclosure in embossed ABS.
4
Steel tank (boiler) enamelled according to UNI
standards (capacity: 200; 260 litres).
5
Upper boiler thermistor.
6
Lower boiler thermistor.
7
Coolant recharge.
8
Ambient air recirculation fan.
9
Lamination valve.
10
High-efficiency finned evaporator. The quantity
of fluid inside is regulated by an
appropriate thermostatic valve.
11
Air inlet (160 mm).
12
Air outlet (160 mm).
13
Hermetically-sealed rotary compressor.
14
Replaceable magnesium anode.
15
(1.5 kW –230 W) Electric heating element
16
Condenser pump discharge line.
17
Condenser return.
18
Replaceable magnesium anode.
19
Hot water outlet connection joint (G 1”).
20
Recirculation fitting (G ¾”).
21
Inlet, coil fitting for solar thermal power system
(G 1”1/4; 1 m2 exchange surface).
22
Condensate drain (G 1/2”).
23
Outlet, coil fitting for solar thermal power
system (G 1”1/4; 1 m2 surface).
24
Cold water inlet connection joint (G 1”).
25
50 mm polyurethane insulation.
26
Automatic resetting safety pressure switch.
29
Air inlet filter.
30
½”G fitting for thermistor immersion sleeve
1
4
6
11
10
9
2
8
18
25
24
16
14
5
4
15
12
22
19
23
20
21
17
3
29
7
13
26
30

Installation Manual
14
RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
4.1 Technical characteristics
1.9 kW
Descriptions
u.m.
RKHH2E200AAV33
RKHH2E260AAV33
RKHH2E260PAAV33
HP thermal power yield
kW
1.82
1.82
1.82
Total thermal power
kW
3.4
3.4
3.4
Heating time (1)
h:m
8:17
10:14
10:14
Heating time in BOOST mode (1)
h:m
3:58
5:06
5:06
Thermal losses (2)
W
60
70
71
Electrical data
Power supply
V
1/N/230
Frequency
Hz
50
Degree of protection
IPX4
HP maximum absorption
kW
0.53
0.53
0.53
Average absorption
kW
0.43
0.43
0.43
Heating element + HP maximum
absorption
kW
2.03
2.03
2.03
Electric heating element power
kW
1.5
1.5
1.5
Maximum current in HP
A
2.4
2.4
2.4
Required overload protections
A
16A T fuse/ 16A automatic switch, characteristic C (to be expected
during installation on power supply systems)
Internal protection
Single safety thermostat with manual reset on a resistive element
Operating conditions
Min.÷ max temperature heat pump
air intake (90% R.H.)
°C
-7÷38
Min. ÷ max temperature installation
site
°C
5÷38
Working temperature
HP Maximum settable temperature -
ECO cycle
°C
56
56
56
Maximum settable temperature in an
AUTOMATIC cycle
°C
70
70
70
Compressor
Rotary
Compressor protection
Thermal circuit breaker with automatic reset
thermodynamic circuit protection
type
Safety pressure switch with automatic reset
Fan
Centrifugal
Ejection outlet diameter
mm
160
Revolutions per minute
rpm
1650÷2100

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 15
Nominal air capacity
m3/h
350÷500
Max. pressure head available
Pa
120
Motor protection
Internal thermal circuit breaker with automatic reset
Condenser
Wrapped externally, not in contact with water
Coolant
R134a
Load
g
900
900
900
Water storage
Water storage nominal capacity
l
196
250
242
Max. quantity of hot water that can
be used Vmax (3)
l
275
342
342
Coil for connection to solar thermal
power system
m2
N/A
N/A
1.0 m2
Cathodic protection
Mg AnodeØ26x400 mm
1 x Mg anodeØ26x250
mm
+
1 x Mg anodeØ26x250
mm
1 x Mg anodeØ26x250
mm
+
1 x Mg anode Ø26x400
mm
Insulation
50 mm high-density polyurethane foam
Defrosting
Active with Hot Gas valve
Dimensions
mm
H1714xD600xDmax650
H2000xD600xDmax650
H2000xD600xDmax650
Transport weight
Kg
103
115
132
Sound power indoors Lw(A) (4)
dB(A)
53
53
53
Automatic anti-Legionnella
disinfection cycle (5)
YES
YES
YES
Maximum working pressure
Bar
7
7
7
(1) temperature of incoming air supply 7°C (6°C), temperature of boiler storage environment 20°C, water heated from 10°C to 55°C,
(according to UNI EN 16147-2011)
(2) measurements carried out according to UNI EN 12897-2006
(3) measurements carried out according to UNI EN 16147-2011
(4) measurements carried out according to EN 12102-2013
(5) automatic activation every 30 days of operation

Installation Manual
16
RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
5 Important information
5.1 Conformity with European
regulations
The present heat pump is a device intended for
domestic use conform with the following European
directives:
•2011/65/UE Directive on the restrictions of use of
certain hazardous substances in electric and
electronic equipment (RoHS);
•Directive 2014/30/UE - Electromagnetic
compatibility (EMC);
•Directive 2014/35/UE –Low Voltage Directive
(LVD)
•Directive 2009/125/CE Ecodesign Requirements.
5.2 Degrees of protection provided
by enclosures
The degree of protection of the equipment is equal to:
IPX4.
5.3 Limitations of use
WARNING!
This device has not been designed, nor is
it intended for use within hazardous
environments (due to the presence of
potentially explosive atmospheres –
according to ATEX standards or with
a requested IP level exceeding that of
the equipment) or in applications that
require (fault-tolerant, fail-safe) safety
characteristics such as in circuit-
breaking systems and/or technologies
or in any other context in which the
malfunctioning of an application could
cause death or injury to people or
animals or serious damage could be
caused to objects or the environment.
N.B.
A unit breakdown or fault may cause
damage (to people, animals or goods). It
is necessary to arrange for a separate
functional monitoring system with alarm
functions in order to avoid such damage
being caused. Moreover, it is necessary
to arrange for a back-up service in case
of failure!
5.4 Operating limits
The above mentioned device is intended to be used
exclusively for the heating of domestic hot water
within the foreseen limitations of use.
The equipment can only be installed and started for the
intended use within closed heating systems in
conformity with the EN 12828 standard.
N.B.
Daikin shall not be held responsible under any
circumstances in the event that the
equipment is used for other purposes than
for which it has been designed and with
regards to any installation errors or
equipment misuse.
WARNING!
It is forbidden to use the device for purposes
other than those intended. Any other use
is to be considered improper and
therefore not allowed.
N.B.
During the design and construction stage of
the systems, current local rules and
provisions were complied with.
5.5 Fundamental safety rules
•The device must be used by adults;
•Do not open or disassemble the device when it is
connected to the power supply;
•Do not touch the device with wet or humid body
parts when barefoot;
•Do not pour or spray the device with water;
•Do not stand, sit and/or rest anything on the
device.
5.6 Information on coolant used
This device contains fluorinated greenhouse gas
included in the Kyoto protocol. Do not discard such
gas into the environment.
Coolant type: HFC-R134a.
N.B.
Maintenance and disposal operations must be
carried out by qualified personnel.

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 17
6 Installation and
connections
WARNING!
Installation, commissioning and maintenance
of the device must be performed by
qualified and authorised personnel. Do
not attempt to install the device yourself.
6.1 Preparation of the installation
site
The installation of the device must be carried out in a
suitable place in order to allow the normal use and
adjustment operations, together with ordinary and
extraordinary maintenance to be performed.
It is therefore important to allow for the necessary
working space. The dimensions are shown in Fig. 2.
Fig. 2 –Minimum spaces
Model
X1
X2
X3
Y1
mm
Mm
mm
mm
RKHH2E200AAV33
RKHH2E260AAV33
RKHH2E260PAAV33
650
650
200
300
Moreover, the premises must:
•Have adequate water and power supply lines;
•Be available and ready for connection to the
condense drain;
•Be available and ready with adequate discharge
pipes in case of damage caused to the boiler or
actuation of the safety valve or breakage of
pipes/connections;
•Have containment systems in case of serious
water leaks;
•Be sufficiently lit (where appropriate);
•Be larger than 20 m3;
•Be frost-proof and dry.
WARNING!
In order to avoid the propagation of
mechanical vibrations, do not install the
equipment on floor slabs with wooden
beams (e.g. in lofts).
6.2 Ventilation connection
In addition to the space indicated in paragraph 0, the
heat pump requires adequate ventilation.
It is necessary to create a dedicated air duct as
indicated in Fig. 3.
Fig. 3 –Example of an air outlet duct
Moreover, it is important to ensure adequate ventilation
of the premises where the equipment is to be
installed.
An alternative solution is illustrated in Fig. 4 and 5,
where a second duct draws air in from outside
instead of directly from inside the premises.
Fig. 4 –Example of dual duct connection
X3
Y1
X2X1
Outside
Outside

≥500 kg

Installation Manual
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RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Carry out the installation of each air duct making sure
that:
•Its weight does not adversely affect the equipment
itself;
•Maintenance operations can be carried out;
•It is adequately protected so as to avoid the
accidental intrusion of material inside the
equipment itself;
•It doesn’t exceed the maximum suggested length
of 6 meters (with 2 elbow junctions of 90°).
•The maximum total allowable pressure drop for all
components within the pipe system does not
exceed 120 Pa, including through holes when
mounted on an external wall.
•When the pipes are installed in a vertical line the
inlet and the outlet pipe should be at least be at
200mm distance of each other.
During operation, the heat pump tends to
lower the ambient temperature if the
external air duct is not enabled.
An appropriate protection grid must be
installed in line with the discharge pipe
conveying air to the outside, with the goal
of preventing foreign bodies from
entering the equipment. In order to
guarantee maximum device
performance, the grid must ensure low
pressure loss.
In order to avoid the formation of condensate:
insulate the air discharge pipes and the
air duct cover connections with steam-
tight thermal cladding of an adequate
thickness.
Sound mufflers can be mounted when
deemed necessary.
Fit the pipes, the holes in the wall and the
connections to the heat pump with
vibration damping systems.
WARNING!
The simultaneous operation of an open-flue
firebox (e.g. an open-flue fireplace)
together with the heat pump causes a
dangerous environmental pressure drop.
This may cause the backflow of exhaust
gas to enter the environment.
Do not operate the heat pump together with
an open-flue firebox.
Use only sealed-chamber fireboxes
(approved) with a separate duct for
combustion air.
Keep the doors to the boiler room closed and
hermetically sealed if there is no
combustio air supply between the
inhabited areas and the boiler room.”
6.2.1 Particular installation conditions
One of the peculiarities of the system is that it can
cause a considerable lowering of the air
temperature of the home.
The exhaust air is colder than the ambient air, as well
as partially dehumidified. As the air is colder and
dehumidified, it may be used to cool specific
environments inside the home by letting it flow
back inside.
Installation consists of the splitting of the discharge pipe
to which two shutters are applied (“A” and ”B”).
Splitting the discharge pipe directs the air flow
either towards the inside (Fig. 5a) or the outside of
the home (Fig. 5b).
Fig. 5a –Example of installation in summer
Fig. 5b –Example of installation in winter
Outside area
Indoor area
Outside area
Indoor area
Shutter “A”
closed
Shutter “B”
open
Shutter “A”
open
Shutter “B”
closed

RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
Installation manual 19
6.3 Device mounting and
connection
The device must be installed on a stable, flat floor
surface that is not subject to vibration.
Fig. 6 –Overall dimensions
(260l versions)
A
B
C
D
E
F
G
mm
mm
mm
mm
mm
mm
mm
650
2000
600
160
1391
-
1085
H
I(*1)
J(*1)
K
L
M
N
mm
mm
mm
mm
mm
mm
mm
-
860
275
70
150
380
195
O
P
mm
mm
337,5
10
(*1) I and Jonly for RKHH2E260PAAV33
(200l versions)
A
B
C
D
E
F
G
mm
mm
mm
mm
mm
mm
mm
650
1714
600
160
1101
-
795
H
I
J
K
L
M
N
mm
mm
mm
mm
mm
mm
mm
-
-
-
70
150
380
195
O
P
mm
mm
337,5
10
6.4 Water supply connections
Connect the cold water inlet and the outlet pipes to the
appropriate connection points (Fig.7).
The table below provides information about the
connection points.
Pos.
Description
Connection/hole

Cold water inlet pipe
G 1”

Hot water outlet pipe
G 1”

Condensate drain
G ½”

Recirculation pipe
G ¾”

Coil for solar thermal
power
G 1”1/4

Thermistor immersion
sleeve (only in
models provided
with it)
½”G
Fig. 7 –Water supply connections
A
ØD
C
N
ØP
B
L
O
M
K
J
I
H
E
G
F






Air outlet
Air inlet

Installation Manual
20
RKHH2E-(P)AAV33
ROTEX Domestic Hot Water Heat Pump
2018.8
The illustration in Fig. 8 is an example of a water supply
connection.
Fig. 8 –Example of the water supply system
Fig. 8a –Example of heavy series safety valve
N.B.
It is compulsory to install a dirt filter on the
cold water inlet pipe. The equipment does
not work with water hardness lower than
12°F; The same goes for particularly high
water hardness (higher than 25°F). It is,
in those cases, recommended to use a
water softener, properly calibrated and
monitored. The residual hardness should
not fall below 15°F.
PLEASE NOTE!
It is advisable for the system installer to install
a 7-bar safety valve on the cold water
intake pipe (Fig. 8a).
N.B.
The safety equipment for protection against
over pressure must be operated regularly
in order to remove limescale deposits and
to check that it is not blocked (Fig. 8a)
N.B.
To ensure proper installation of the
equipment, a hydraulic safety group in
accordance to UNI EN 1487:2002
standard should be provided. It should (at
least) include: a shut-off valve, a check
valve, a control device of the check valve,
a safety valve and a device to interrupt
the water load (Fig. 8a)
N.B.
The drain pipe connected to the equipment for
protection against overpressure must be
installed sloping continuously downwards
and in an area where it is protected
against the formation of ice (Fig. 8a)
WARNING!
In case an expansion vessel is not being
installed, make sure that there’s no non-
return valve installed in the cold water
intake.
WARNING!
The heat pump for the production of domestic
hot water is capable of heating water to
more than 60°C. It is therefore necessary,
as a protection against burns, to install an
automatic thermostat mixing equipment
on the hot water pipe (Fig. 8).
6.4.1 Condense drain connections
Condensate that forms during the operation of the heat
pump flows through an appropriate discharge pipe
(G 1/2”) that passes inside cladding and comes out
on the side of the equipment.
This must be connected to a duct via a siphon to allow
the condensate to flow freely (Fig. 9a or Fig. 9b).



alv
ola







Water inlet pipe;
Shut-off valve;
Automatic thermostat mixing equipment
Heat pump
Ricirculation pump
Spring check valve
Hot water outlet pipe
Safety valve
Inspectionable end of discharge pipe
Drain tap
Expansion vessel
Cold water inlet
Boiler connection
Drain tap connection