ratiotherm WP Max-Air Technical manual

Technical Document
State 07.06.2019
WP Max-Air

2
TABLE OF CONTENTS
1. Functional description 3
2. Notes on the documentation 4
2.1 Basic safety instructions 5
2.2 Symbols used 6
2.3 Intended Use 7
2.4 General safety instructions 8
2.5 Installation and adjustment 9
2.6 Directives, standards and laws 10
2.7 Qualification of personnel 11
2.8 Responsibility of the skilled technician 12
3. Technical data 13
3.1 Types, power, dimensions, weight 13
4. Mechanical Installation 15
4.1 Internal unit 15
4.2 External unit 16
4.3 Foundation plan 17
5. Hydraulic installation 18
5.1 Connection measurements and dimensions 18
5.2 Scheme: Standard without Solar (Connection HC RT at 4) 19
5.3 Scheme: Standard with Solar (Connection HC RT at 6) 20
5.4 Scheme: Full scheme with hybrid and cooling 21
5.5 Pressure loss chart 22
5.6 Pressure loss chart hybrid 23
5.7 Requirements for heating water 24
6. Electrical Installation 25
6.1 Clues 25
6.2 Terminal diagram and description 26
6.3 Electrical connected load 26
6.4 CAN-bus plan 27
7. Refrigeration installation 28
7.1 Pipe dimensioning according to distance to outdoor part 28
7.2 Cooling pattern 30
8. Structure and function 31
8.1 Structure and spare parts 31
8.2 Noise exposure of the external unit 34
8.3 Control logic and control 35
8.4 Hybrid option 36
9. Operating instructions 37
9.1 Controller operation 37
9.2 Settings 41
10. Troubleshooting & correction 44
11. Service & Maintenance 46
11.1 Cleaning 46
11.2 Maintenance 46
11.3 Leakage check 47
12. Decommissioning & Disposal 48
13. Appendix 49
13.1 Electrical plan 49
13.2 Condenser pump Wilo-Para StG 55
13.3 Hybrid pump Grundfos UPM3 59
13.4 Error codes frequency inverter Bonfiglioli Agile 61
13.5 Technical data UVR 16x2 65
13.6 Refrigerant R410A 67
13.7 Compressor oil 72
13.8 Label 76
13.9 EC declaration of conformity 77

3
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
1. FUNCTIONAL DESCRIPTION
The ratiotherm WP Max-Air air heat pump is designed as a split heat pump and
characterised by very quiet operation. By using the heat pump, the stored energy of
the ambient air can be easily tapped. No earth or well construction work is necessary.
The maximum flow temperature is 62°C. Thanks to its variable-speed compressor, it can be
infinitely adjusted in output and is therefore particularly efficient. This feature is complemented
by Smart Grid capabilities, which makes it perfectly suited for power-to-heat applications as well
as network-related applications. An optional hybrid heat exchanger makes it easy to use another
environmental source. Solar collectors or heat recovery systems, for instance, can be connected here.
ADVANTAGES
• Easy installation without expensive excavation
work
• Increased efficiency possible with optional
hybrid heat exchanger
• Maximum flexibility thanks to speed-controlled
inverter operation
• Integrated energy management (SG capable)
• Very quiet outdoors
• With ratiotherm components, a completely
compatible, future-proof system

4
The following notes are a guide through the complete documentation.
Further documents are valid in conjunction with these operating and installation instructions.
These installation and operating instructions for the specialist technician are an integral part of the
ratiotherm WP Max-Air air heat pump.
The ratiotherm WP Max-Air air heat pump must not be operated without these instructions.
The instructions must be made available to the operator and the specialist tradesman at all times for
information purposes.
If the ratiotherm WP Max-Air air heat pump is sold, the instructions must be supplied with it.
We accept no liability for damage caused by non-compliance with these instructions.
2. NOTES ONTHE DOCUMENTATION
TARGET AUDIENCE
These operating instructions are intended for
• the operator and
• the specialist craftsman of the plant.
RETENTION OF RECORDS
Keep this manual and all applicable documentation in a safe place for
future reference.
When moving out or selling, hand over the documents to your
successor.

5
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
2. NOTES ONTHE DOCUMENTATION
2.1 BASIC SAFETY INSTRUCTIONS
DANGER!
WARNING!
HINT!
BEWARE!
Immediate threat of danger,
which could result in serious injury or death.
Possibly dangerous situation,
that could result in serious injury or death.
Possibly dangerous situation,
that could lead to assault.
Possibly dangerous situation,
that could result in personal injury or damage to a component or thing in
the vicinity.
Application notes
and other useful information to facilitate the intended use of the machine.

6
2. NOTES ONTHE DOCUMENTATION
2.2 SYMBOLS USED
danger spot danger from electric current
Warning of hot surfaces
and liquids
STOP
activate before working
read operating instructions
advice against damage

7
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
2. NOTES ONTHE DOCUMENTATION
2.3 INTENDED USE
The ratiotherm WP Max-Air air heat pump has been built in accordance with the state of the art and
recognised safety regulations.
The heater is intended exclusively for domestic and / or commercial use for hot water preparation (domes-
tic hot water) and for heating or cooling.
Improper or inappropriate use may result in danger to life of the user or third parties.
In addition, the equipment and other material assets may be impaired.
The ratiotherm WP Max-Air air heat pump is not intended for use by persons (including
children) with limited physical, sensory or mental abilities.
The heat pump must also not be operated by persons with insufficient experience and/or
knowledge
• unless they are supervised by a person responsible for their safety or have received
instructions from that person on how to use the appliance.
The ratiotherm WP Max-Air air heat pump is designed exclusively for domestic hot water
preparation and for heat and cold generation.
Any other use or use going beyond this is considered improper use. The manufacturer/
supplier is not liable for any resulting damage.
The risk is borne solely by the user (operator).
Intended use also includes observance of the operating and installation instructions and all
other applicable documents and compliance with the inspection and maintenance conditions.

8
2. NOTES ONTHE DOCUMENTATION
2.4 GENERAL SAFETY INSTRUCTIONS
ATTENTION! DAMAGE POSSIBLE
• Use only by qualified and instructed persons.
• Only for intended use.
• Any other use constitutes misuse.
CAUTION! DANGER OF SCALDING
• The outlet temperature at the hot water taps can be up to 60°C.
• Carefully check the water temperature at the hot water taps before
holding your hands all the way into the water jet.
HINT! DAMAGE POSSIBLE
Damage to the air heat pump and components possible.
• Read and follow the operating instructions.
• In order to avoid accidents and damage to property, the safety
instructions must be observed!
• The national regulations of the country in which the ratiotherm WP
Max-Air air heat pump is used must be observed.
WARNING! DAMAGE POSSIBLE
Do not make any changes:
• at the air heat pump;
• on the water and power lines;
• on the safety valve;
• structural conditions which may have an influence on the operational
safety of the device;
• structural conditions in the environment of the device, as far as these
can have an influence on the operational safety of the device.

9
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
2. NOTES ONTHE DOCUMENTATION
2.5 INSTALLATION AND ADJUSTMENT
The installation, commissioning or dismantling of the device may
only be carried out by a specialist with specific knowledge which is
necessary for the activities with this device.
The existing regulations, rules and guidelines as well as the local
installation specifications must be observed.
BEWARE!
Safety valve and blow-off line
During the heating process, the water volume increases. For this
reason, never close the blow-off line of the safety valve.
Hot water can escape from the blow-off line!
Leakage
If there are leaks in the heat pump area, switch off the system and
close the connection to the rest of the heating system.This must then
be repaired immediately.
HINT!
Corrosion damage
To prevent corrosion on the device, do not use any sprays, solvents,
cleaning agents containing chlorine, paints, adhesives, etc. in the
vicinity of the device. These substances can lead to corrosion under
unfavourable circumstances.
Spare and wear parts
Components that have not been tested with the system can cause
damage to the system or impair its functions. Only use original spare
parts and original wear parts.

10
2. NOTES ONTHE DOCUMENTATION
2.6 DIRECTIVES, STANDARDS AND LAWS
When setting up and installing the heater, the following regulations, rules and guidelines must
be observed:
IN GERMANY:
• VDE and EVU regulations and provisions (in particular VDE 0100);
• Regulations and rules of local utilities;
• DVGW Code of Practice W 382
„Installation and operation of pressure reducers in drinking water consumption
systems“;
• DIN 1988 - TRWI Technical rules for drinking water installations;
• DIN 4753 - Water heating systems for drinking and process water;
• DIN 8947 - Heat pumps ready for connection for water heating with
electrically driven compressors;
• Accident prevention regulations VGB 20 Accident prevention regulations
„Refrigeration systems“ with implementation instructions;
• Energy Saving Ordinance EnEV - Ordinance on Energy-Saving Thermal
Insulation and Energy-Saving Plant Technology in Buildings 2009
In addition, further local regulations and guidelines, e.g. local building codes, may
have to be observed.
In principle, the legal regulations applicable in the respective country must be
observed!

11
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
2. NOTES ONTHE DOCUMENTATION
2.7 QUALIFICATION OF PERSONNEL
The installation, commissioning or dismantling of the device may only be
carried out by a specialist with specific knowledge which is necessary for
the activities with this device.
By personnel we mean all persons who work on the ratiotherm WP Max-Air
air heat pump. In this sense, trainees are not qualified personnel.
We assume that
• the operating personnel was trained to operate the ratiotherm WP Max-
Air air heat pump.
• the maintenance personnel adjust, check and repair the ratiotherm WP
Max-Air air heat pump in such a way that there is no danger to people or
property.

12
2. NOTES ONTHE DOCUMENTATION
2.8 RESPONSIBILITY OFTHE SKILLEDTRADESMAN
BEWARE!
In order to avoid injuries of any kind, the general accident prevention
regulations must be observed under all circumstances and personal
protective equipment must be used accordingly.
In order to ensure a safe installation, the responsible specialist
craftsman must ensure that:
• the personnel have the necessary qualifications and receive the
necessary training;
• the personnel has read and understood the operating instructions;
• the personnel have access to the operating instructions at all times;
• the local accident prevention and environmental regulations are
implemented and observed;
• the personnel is instructed by the responsible superior and unauthorised
persons are kept away from the ratiotherm WP Max-Air air heat pump;
• the ratiotherm WP Max-Air air heat pump is only handed over and
operated in a safe and functional condition and any damage to the heat
pump is repaired immediately or the damaged heat pump is shut down
immediately.
Technical changes
Technical modifications to the system are not permitted.
This also applies to the subsequent installation of safety devices and to
welding on load-bearing parts.
Safety devices must not be taken out of operation. Only original spare parts
and original accessories of the manufacturer are to be used.

13
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
3.TECHNICAL DATA
3.1TYPES, POWER, DIMENSIONS, WEIGHT
MaxAir (Air/Water) Flex 12
Performance data heating mode
A+2/W35 rated speed=5400U/min (1800 to 7200 rpm)
Heating capacity 13,3 (3,6 to 17,7) kW
Power consumption 2,6 (0,8 to 3,4) kW
Coefficient of performance 5,11
W15/A35 rated speed=5400U/min (1800 to 7200 rpm)
Cooling capacity 16,1 (4,3 to 21,4) kW
Power consumption 3,1 (1,0 to 4,1) kW
Coefficient of performance 5,19
Compressor
Design type fully hermetic, rolling piston, inverter
Rotational speed 720 to 7200 rpm
max. operating current 16 A
Blocking current LRA 44 A
Oil quantity 0,63 ltr.
Evaporator (external unit)
Design type air heat exchanger
Material aluminium, copper
Air flow 7000 m3/h
Testing pressure 35 bar
Application range -30 to +50 °C
Connection dimension refrigeration liquid line 12, suction gas line 28 mm
Condenser
Design type copper brazed plate heat exchanger
Material stainless steel / copper
Volumetric flow water 0,5 to 2 m3/h
Pressure loss max. 0,5 bar
Temperature difference 5 to 8 K
Testing pressure 45 bar
Application range -196 to +200 °C
Connection dimension 1 1/4“, external thread
Refrigeration circuit
Refrigerant R410 A
Filling quantity with 10m split line 6,5 kg
max. operating pressure 42 bar

14
Electrics
Mains connection 400 V / 3~ / 50 Hz
Slow fuse 20 A
max. operating current compressor 16 A
Instrument data
Sound pressure level interal unit at 1m distance 42 dB (A)
Sound pressure level external unit at 1m distance 34 dB (A)
Measurements internal unit 500 x 1300 x 540 BxHxT (mm)
Measurements external unit 1340 x 1410 x 660 BxHxT (mm)
Weight internal unit 100 kg
Weight external unit 232 (without attachments 137) kg
max. operating pressure water 6 bar
max. FT temperature 62 °C
3.TECHNICAL DATA
3.1TYPES, POWER, DIMENSIONS, WEIGHT

15
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
Installation conditions:
• The ratiotherm WP Max-Air air heat pump must be installed in a clean, ventilated and dry place. The
ambient temperature must be >10°C permanently.
• The minimum distances must be observed for maintenance reasons.
• Depending on the installation site, a sound-insulated underlay is recommended.
Dimensions:
Clearance dimensions:
4. MECHANICAL INSTALLATION
4.1 INTERNAL UNIT

16
Installation conditions:
• The outdoor unit must be installed in such a way that no refrigerant can enter the building or otherwise
endanger persons.
• If the outdoor unit is installed close to a wall, a minimum distance of 1 metre must be maintained
(sound reflection).
• A free air flow (5000 m3/h) must be guaranteed. The outdoor unit must not be converted or enclosed.
• An appropriate foundation must be laid before the outdoor unit is installed (see dimensions of outdoor
unit and foundation plan).
• Since the amount of condensate produced during heat pump operation depends on the output
and humidity, the amount of condensate must be drained off if the floor below the outdoor unit is
impermeable.
• The outdoor unit can be installed at a different height from the heat pump indoor unit. The following
maximum height deviations are possible:
• Outdoor unit max. 5 metres lower or 9 metres higher than indoor unit
• If larger differences in height are required, please contact ratiotherm if necessary.
• The outdoor unit can be installed as standard at a distance of max. 20 m (single cable length) from the
indoor unit, longer cable lengths are only possible after consultation with ratiotherm.
4. MECHANICAL INSTALLATION
4.2 EXTERNAL UNIT
Clearance dimensions:
connection entry

17
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
4. MECHANICAL INSTALLATION
4.3 FOUNDATION PLAN
4.2 EXTERNAL UNIT
seepage area (e.g. gravel)
drip-off area
air ejection direction
bottom view:
top view:

18
5. HYDRAULIC INSTALLATION
5.1 CONNECTION MEASUREMENTS AND DIMENSIONS
• Shut-offs and vents must be provided on site.
• A vibration decoupled connection via hoses is recommended.
Recommendation: CornerstoneTWS 32
• Please fill the system via the return line.
• A drain tap is installed in the system on the heating side.
• In the source circuit, emptying must be provided outside the plant.
• When tightening, please hold the connections against each other!

19
TU_EN_WP_Max-Air_Flex_12_2019.09-Errors and changes of all data, pictures and drawings are reserved.
Compliance with the generally applicable and recognised rules of technology is imperative!
ATTENTION! Installation, wiring only by authorised specialist personnel.
5. HYDRAULIC INSTALLATION
5.2 SCHEME: STANDARD WITHOUT SOLAR (CONNECTION HC RT AT 4)
T T
M
TT
F
KW
WW
Niedertemperatur
Heizkreis
Trinkwasser
Kompaktstation
rZR 16x2
0-10V
Auto-O - Hand
I
O
230V
Hand-O - Auto
Netz
M
M
000
∑
m
³
F
CAN-EZ Knoten 13 (WP-Regelung)
CAN-I/O45 Knoten 12 (WP-Regelung)
CAN-I/O45 Knoten 34 (Option E-Stab)
A 1A 1
S 6S 6
S 7
S 7
S 15
S 15
A 16 PWM
A 16 PWM
A 1
A 1
Außenfühler
S 4S 4
S 13S 13
A 3
A 8/9
A 12A 12
A 12
A 12
A 6A 6
S 8S 8
rZR 16x2 Knoten 1
UVR 16x2 Knoten 11 (WP-Regelung)
E
A 1/A 2/A 3
S 1
Name Datum
09.07.2018
Planbezeichnung: Standardschema WP Max-Air II ohne Solar
Achtung: Dieses Schema ist nur
eine Empfehlung und erhebt in
jeglicher Hinsicht keinen
Anspruch auf Vollständigkeit.
Geprüft
Gezeichnet
L. Böheim
Schema Nr.:
M
T
S16
000
∑
m
³
Absperreinrichtung Absperreinrichtung
mit Sicherungsklappe
Motorventil
3-Wege-Mischer mit
Stellmotor (Summentor oben)
Absperreinrichtung mit
Entleerung
M
F
3-Wege-Mischer mit
Feststellventil (Summentor oben)
Sicherheitsventil
Manometer
(Druckmesser)
Pumpe in Fließrichtung
Rückschlagklappe
Plattenwärmetauscher
Durchflussmengen
Einstellventil
Strömungsschalter / -geber
Thermometer
Wärmezähler
Sensor
Ausdehnungsgefäß
Entleerung
S
J. Kruck
09.07.2018
Geändert Geändert
S 1S 1 S 2 S 2 S 3 S 3 S 11 S 11
Oskar°
Wärmepumpenspeicher
1103 2 8 76
49 5
15.01.2019
L. Böheim

20
5. HYDRAULIC INSTALLATION
5.3 SCHEME: STANDARD WITH SOLAR (CONNECTION HC RT AT 6)
TT
T T
T T
M
TT
F
KW
WW
Niedertemperatur
Heizkreis
Trinkwasser
Kompaktstation
Solarthermie-Anlage
rZR 16x2
0-10V
Auto-O - Hand
I
O
230V
Hand-O - Auto
Netz
M
M
000
∑
m
³
OSKAR°
Wärmepumpenspeicher
F
CAN-EZ Knoten 13 (WP-Regelung)
CAN-I/O45 Knoten 12 (WP-Regelung)
CAN-I/O45 Knoten 34 (Option E-Stab)
A 1A 1
S 6S 6
S 7
S 7
S 15
S 15
A 16 PWM
A 16 PWM
A 1
A 1
S 1S 1
S 2
S 2
S 3
S 3
S 11
S 11
S 12S 12
S 9
S 9
S 10
S 10
Außenfühler
S 4S 4
S 13S 13
A 3
A2 / 230 V A15 PWM A2 / 230 V A15 PWM
A2 / 230 V A14 PWM
A2 / 230 V A14 PWM
A 8/9
A 12A 12
A 12
A 12
A 6A 6
S 8S 8
rZR 16x2 Knoten 1
UVR 16x2 Knoten 11 (WP-Regelung)
E
A 1/A 2/A 3
S 1
Name Datum
09.07.2018
Planbezeichnung: Standardschema WP Max-Air II
Achtung: Dieses Schema ist nur
eine Empfehlung und erhebt in
jeglicher Hinsicht keinen
Anspruch auf Vollständigkeit.
Geprüft
Gezeichnet
L. Böheim
Schema Nr.:
M
T
S16
000
∑
m
³
Absperreinrichtung Absperreinrichtung
mit Sicherungsklappe
Motorventil
3-Wege-Mischer mit
Stellmotor (Summentor oben)
Absperreinrichtung mit
Entleerung
M
F
3-Wege-Mischer mit
Feststellventil (Summentor oben)
Sicherheitsventil
Manometer
(Druckmesser)
Pumpe in Fließrichtung
Rückschlagklappe
Plattenwärmetauscher
Durchflussmengen
Einstellventil
Strömungsschalter / -geber
Thermometer
Wärmezähler
Sensor
Ausdehnungsgefäß
Entleerung
S
J. Kruck
09.07.2018
Geändert Geändert
M
A2A2
1103 2 8 76
49 5
15.01.2019
L. Böheim