MHG Heating ThermSelect Series Guide

ThermSelect®
As of 9 March 2011

Table of Contents
1Safety............................................................................................................................................................4
1.1 General.......................................................................................................................................................................... 4
1.2 Intended use.................................................................................................................................................................. 5
1.3 Explanation of symbols.................................................................................................................................................. 6
1.4 Personnel requirements ................................................................................................................................................ 7
1.5 Special dangers............................................................................................................................................................. 8
2Standards and Regulations......................................................................................................................11
2.1 Standards and Regulations ......................................................................................................................................... 11
3Transport, Packaging, Storage ................................................................................................................14
3.1 Safety notes for transport ............................................................................................................................................ 14
3.2 Inspection of the delivery............................................................................................................................................. 15
3.3 Notes on storage ......................................................................................................................................................... 15
3.4 Handling of packaging material ................................................................................................................................... 15
3.5 Disposal of packaging ................................................................................................................................................. 16
3.6 Disposal of the device ................................................................................................................................................. 16
4General .......................................................................................................................................................17
4.1 Product description...................................................................................................................................................... 17
4.2 What is included .......................................................................................................................................................... 18
4.3 Accessories ................................................................................................................................................................. 18
5Technical data............................................................................................................................................20
5.1 Dimensions and connection ratings............................................................................................................................. 20
5.2 Identification plate........................................................................................................................................................ 22
5.3 Technical data ............................................................................................................................................................. 24
5.4 Electrical data.............................................................................................................................................................. 26
6Installation..................................................................................................................................................36
6.1 Safety during assembly ............................................................................................................................................... 36
6.2 Requirements on the erection location of the heat pump ............................................................................................ 36
6.3 Assembly tools ............................................................................................................................................................ 39
6.4 Installation information................................................................................................................................................. 39
6.5 Hydraulic connection ................................................................................................................................................... 50
6.6 Electrical connection.................................................................................................................................................... 52

Table of Contents
7Commissioning .........................................................................................................................................62
7.1 Safety during startup ................................................................................................................................................... 62
7.2 Inspection prior to startup ............................................................................................................................................ 62
7.3 Commissioning ............................................................................................................................................................ 63
7.4 Setting the controller.................................................................................................................................................... 65
7.5 Parameterisation ......................................................................................................................................................... 66
7.6 Commissioning record................................................................................................................................................. 66
8Maintenance...............................................................................................................................................67
8.1 Maintenance................................................................................................................................................................ 67
8.2 Components relevant to safety.................................................................................................................................... 68
8.3 Work to be carried out ................................................................................................................................................. 68
8.4 Spare part drawing and legend.................................................................................................................................... 72
9Troubleshooting........................................................................................................................................73
9.1 Troubleshooting........................................................................................................................................................... 73
10 Warranty.....................................................................................................................................................76
10.1 Warranty...................................................................................................................................................................... 76
10.2 Manufacturer Certificate / EU Design Conformity Declaration..................................................................................... 79
10.3 Proof of Service ........................................................................................................................................................... 81
11 Hydraulic diagrams...................................................................................................................................86
11.1 Hydraulic diagrams...................................................................................................................................................... 86
12 Index...........................................................................................................................................................98

1. Safety ThermSelect®
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1 Safety
1.1 General
Assembly, Commissioning and Maintenance Instructions
- are addressed to technicians of professional heating companies.
- Contains important information for safe handling of the device.
Compliance with all specified safety information and handling in-
structions is the prerequisite for safe working.
- Must be following by all persons working on the device.
The information contained in this document is accurate and up to date
to the best of our knowledge at the time of writing. The information
provided serves as a reference for the safe operation of the product
named in the Assembly, Startup, and Maintenance Instructions. The
information provided is not transferable to any other products.
Safekeeping of documentation NOTE!
These instructions must remain on the device, so
that they are also available if required later. With a
change of operator, the instructions must be handed
over to the subsequent operator.

ThermSelect® 1. Safety
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1.2 Intended use
The devices are intended as heat sources for closed warm water
central heating systems and for central warm water preparation. Any
other or more comprehensive use is not as intended.
MHG Heiztechnik does not assume any liability for consequential
damages. The risk will be borne by the owner of the equipment
alone.
MHG devices have been built in accordance with the applicable
standards and guidelines as well as the valid safety rules. However,
personal injuries or property damage may occur if not used properly.
To avoid hazards, the device may only be used:
- For its intended purpose
- In a proper condition, in terms of safety equipment
- In compliance with the instructions for Assembly, Startup and
Maintenance, as well as the operating instructions
- In compliance with the necessary maintenance activities
- In compliance with the technologically required minimum and max-
imum values
- If malfunctions that may compromise safety have been remedied
immediately
- If all of the safety and warning signs attached on and in the device
are not removed and remain legible
CAUTION!
Device damage through weather impacts!
Electrical hazard through water and corrosion of the
enclosure and the components.
Therefore:
- The internal unit may not be operated outdoors. It is
suitable only for operation in rooms.
CAUTION!
System damage from frost!
The heating system can freeze in case of frost.
Therefore:
- Leave the heating system in operation during a
frost period, so that the rooms are sufficiently tem-
pered. This also applies in the case of the opera-
tor's absence or if the rooms are vacant.

1. Safety ThermSelect®
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1.3 Explanation of symbols
The section provides an overview of all important safety aspects for
optimum personal safety, as well as for safe and fault-free opera-
tion.
The handling instructions and safety notes specified in these instruc-
tions must be followed to prevent accidents, personal injuries and
property damages.
DANGER!
… indicates life-threatening situations due to
electric current.
WARNING!
… indicates a possibly hazardous situation, which
can lead to death or serious injuries, if not avoided.
PRECAUTION!
… indicates a possibly hazardous situation, which
can lead to minor or slight injuries, if not avoided.
CAUTION!
... indicates a possibly hazardous situation, which
can lead to property damage, if not avoided.
NOTE!
... highlights useful tips and recommendations, as
well as information for efficient and fault-free opera-
tion.

ThermSelect® 1. Safety
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1.4 Personnel requirements
WARNING!
Danger to life if not sufficiently qualified!
Improper handling leads to considerable personal
injuries and property damages.
Therefore:
- Assembly, startup and maintenance works, repairs
or change to the set fuel quantity may only be car-
ried out by a heating
and/or air conditioning professional.
- Consult professionals in case of doubt.
The following qualifications for various task areas are listed in the
instructions:
- Equipment operator
must be informed about the handling of the equipment; in particu-
lar, he must receive the operating instructions for the device. He is
responsible for the proper operation of the system and must en-
sure that it is regularly serviced by a specialist fitter.
- Technical personnel
are able because of their technical training, know-how and expe-
rience as well as knowledge of the relevant regulations to carry
out the work activities assigned to them and to detect possible
dangers on their own.
- Cooling systems technician
must provide certification in accordance with Article 5 of the
Commission Regulation (EC) No 303/2008 establishing, pursuant
to Regulation (EC) No 842/2006 of the European Parliament and
of the Council. 2, Sentence 1 of ChemKlimaschutzV (Chemicals-
Climate Protection Regulation)

1. Safety ThermSelect®
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1.5 Special dangers
In the following section the remaining risks are specified which result
based on the risk analysis.
The safety information listed here and the warning instructions in the
subsequent chapters of this manual must be followed to reduce
health risks and to avoid dangerous situations.
Electrical current DANGER!
Risk to life through electrical current!
Contact with live components can cause serious inju-
ries.
Therefore:
- Work on electrical systems may only be performed
by professional electricians.
- Turn off electric power before beginning the work
activities and secure against being turned on again.
- In case of damaged insulation, immediately cut off
the power supply and initiate the repair.
Hot surfaces PRECAUTION!
Risk of burning from hot surfaces!
Contact with hot components can cause burns.
Therefore:
- Always wear protective gloves when working near
hot components.
- Make sure that all components have cooled down
to the ambient temperature before commencing any
work.
- Do not touch the compressor and hot gas line dur-
ing operation.

ThermSelect® 1. Safety
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Refrigerant The safety datasheet concerning refrigerant R 407 C is available for
download at www.mhg.de\Download\Sicherheitsdatenblätter.
NOTE!
in case of emergencies, ring
the telephone number below:
[phone] [CareChem 24] (Europe)
WARNING!
Danger to life through lack of oxygen!
Vapours of the refrigerants R 407 C are heavier than
air and may cause suffocation by displacing oxygen.
Therefore:
- Exercise special caution when entering lower lying
closed rooms.
- Work on the refrigerant circulation may only be per-
formed by persons possessing a refrigeration cer-
tificate in accordance with ChemKlimaschutzV.
- Do not smoke when handling refrigerant as its
products of decomposition in the lit cigarette act as
an irritant and a poison!
PRECAUTION!
Risk of injury due to refrigerant!
Refrigerant is corrosive and causes cold burns upon
contact with skin.
Therefore:
- Wear chemical-resistant protective gloves when
handling refrigerant at any time.
- Wear protective glasses to avoid contact with eyes.

1. Safety ThermSelect®
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Changes to the device WARNING!
Risk of life through electrical shock as well as de-
struction of the device from water leakage!
The operating permit becomes void when making
modifications to the device!
Therefore:
Do not make any modifications to the following
items:
- To the safety valve and to the outlet line for the
heating water
- To structural circumstances, which can have an
influence on the operating safety of the device.
- Opening and/or repairing original parts (e.g. drive,
controller)
WARNING!
Risk to life and damage to the environment through
refrigerant leakage!
The operating permit becomes void when making
modifications to the device!
Therefore:
Do not make any modifications to the following
items:
- To the interior or exterior unit of the device
- On the lines for water, electrical power and refrige-
rant
Heating water WARNING!
Risk of poisoning through heating water!
The use of heating water leads to poisoning.
Therefore:
- Never use heating water as drinking water because
it is contaminated from dissolved deposits.

ThermSelect® 2. Standards and Regulations
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2 Standards and Regulatio ns
2.1 Standards and Regulations
The following standards and regulations must be observed with the
installation and operation of the heating system.
Standards
Standards Publication
date Title
DIN EN
12056 01.2001 Drainage systems
DIN EN
12502 01.2001 Corrosion protection of metallic ma-
terials
DIN EN
12828 06.2003
Heating systems in buildings, safety
equipment of warm water heating
systems
DIN EN
60335, Part 1 2004 Safety of electrical appliances for household and similar purposes
DIN 1986 --- Materials drainage system / Proper-
ty drainage
DIN 1988 12.1988 Technical rules for drinking water
installations (TRWI)
DIN 4726 01.2001 Plastic pipes for warm water floor
heating
DIN 4753 03.1988
Water heaters and water heating
systems for drinking and service
water
DIN 18380 10.2006 Heating systems and central water
heating systems (VOB)
Regulations The erection and operation of the heating system requires com-
pliance with the technical building supervision rules as well as other
legal stipulations of the individual countries.
Regulations Publication
date Title
EC Regula-
tion No
842/2006
07.2006
F-Gas Directive
regulates all chlorine-free fluori-
nated refrigerants (CFC and HFC,
i.e. R134A, R404A, R407C, R410A,
R507)
EnEV (Ger-
man Energy
Conservation
Regulations)
12.2004 Energy savings directive
ATV ---
Worksheet ATV-A 115
"Discharging non-household waste
water into a public waste water sys-
tem"

2. Standards and Regulations ThermSelect®
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Regulations Publication
date Title
TA Noise 03.2000
Sixth General Administrative Regu-
lation to the Federal Immission Con-
trol Act (Technical Instruction on
Noise Protection)
TRGS 521
Part 4 --- Technical rules for hazardous sub-
stances
VDI 2035 12.2006
Guidelines for the prevention of
damages in warm water heating
systems - calcification in drinking
water heating systems and warm
water heating systems
VDE ---
Stipulations and special require-
ments of the public utility companies
Additional Standards / Regulations
for Austria In Austria, the local building regulations as well as the ÖVGW regu-
lations must be observed with the installation.
Standards Publication
date Title
ÖNORM
EN 14336 2004 Heating systems in buildings - Plan-
ning of warm water planning systems
ÖNORM
H 5195-1 05.2006
Prevention of damages through cor-
rosion and calcification in closed
warm water heating systems with op-
erating temperatures up to 100 °C
ÖNORM
M 7550 02.2002
Boilers with operation temperatures
up to 100 °C - Terms, requirements,
tests, designations

ThermSelect® 2. Standards and Regulations
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Additional Standards / Regulations
for Switzerland Assembly, startup and maintenance may only be carried out by an
approved installation company. Work on electric system compo-
nents may only be carried out by a licensed
electrical technician.
The legal standards and stipulations on electrical installations must
be followed, especially:
Directives / Guidelines by
LRV Swiss air purification directive
VKF Association of cantonal fire insurances
SVGW Swiss association of gas and water technologies
SEV Swiss association for electrical, energy and in-
formation technology
SWKI Swiss Association of Heating and Air Condition-
ing Engineers
Gebäude-Klima
Schweiz
Association of the Heat, Ventilation and Air Con-
ditioning Technology Industry
GebäudeKlima Schweiz Technical Bulletins
(formerly PROCAL)
Corrosion damages through oxygen in heating water - oxygen cor-
rosion
Corrosion through halogenated hydrocarbons
Information regarding corrosion damage from water heating
Procal / AWP
Guideline on the processing and quality of water in the heating
system Procal / AWP
BUWAL Technical Bulletins
Approval of systems with refrigerants stable in air

3. Transport, Packaging, Storage ThermSelect®
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3 Transport, Packaging, Stor age
3.1 Safety notes for transport
CAUTION!
Damage through improper transport!
Significant property damage may be incurred by im-
proper transport.
Therefore:
- Be careful when unloading packaging items upon
delivery as well as during in-plant transport and
obey the symbols on the packaging.
- Do not expose the device to hard shocks.
- Use only the intended slinging points.
- Remove the packaging only shortly before assem-
bly.
CAUTION!
Device damage through improper handling!
The machine oil shifts.
Therefore:
- The heat pump may only be transported standing
and never horizontally.
- The heat pump may only be tilted up to 45° for a
short time.
CAUTION!
Device damage through improper handling!
The copper pipes can be easily bent!
Therefore:
- Do not hold on to the insulated pipe (hot gas line)!
- Apply force only to the base plate or the frame!
PRECAUTION!
Risk of injury through improper handling!
Improper handling can cause injuries like contusions,
cuts and bruises.
Therefore:
- Personal safety equipment: Safety shoes and safety
gloves must be worn for handling and transport.

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3.2 Inspection of the delivery
Inspect the delivery immediately upon receipt for completeness and
transport damages.
Proceed as follows when noting eternally visible transport damages:
- Do not accept the delivery or only conditionally.
- Note the extent of the damage on the transport documents or the
delivery bill of the freight forwarder.
- Initiate complaint.
NOTE!
Report each defect as soon as it is detected. Damage
compensation claims can only be asserted within the
respective claim periods.
3.3 Notes on storage
The shaft of the circulation pump may seize during extended sto-
rage.
Moisture condensation, icing and water impact are not permitted.
Temperature range: -10°C … +50°C
Humidity: < 95% rel. hum.
3.4 Handling of packaging -
material WARNING!
Risk of suffocation from plastic foils!
Plastic foils and bags, etc. can become a dangerous
toy for children.
Therefore:
- Do not allow packaging material to lie carelessly
about.
- Packaging material must never get into the hands
of children!

3. Transport, Packaging, Storage ThermSelect®
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3.5 Disposal of packaging
Recycling: The entire packaging material (carton material, routing
sheets, plastic foils and pouches) are completely recyclable.
3.6 Disposal of the device
NOTES FOR DISPOSAL!
- The device contains electrical and electronic com-
ponents.
- Please do not dispose of device or replaced parts in
household waste. Proper disposal of hazardous
waste is required.
- End-of-life devices must be taken to the respective
public collection point for proper disposal.
- Disposal must be in accordance with current local
laws and regulations.
CAUTION!
Environmental damage due to improper disposal!
Refrigerant and compressor leak.
Therefore:
- In accordance with EC Regulation No 842/2006, op-
erators of stationary facilities are responsible for
putting in place arrangements for the proper recov-
ery of fluorinated greenhouse gases by certified
personnel to ensure their recycling, reclamation or
destruction.

ThermSelect® 4. General
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4 General
4.1 Product description
ThermSelect®is is available in the versions,
•ThermSelect®
•ThermSelect®Pro
•ThermSelect®Sun
•ThermSelect®Sun Pro
and with extensive accessory sets. The standard sizes are available
for a capacity range from 10.4-40.9 kW.
ThermSelect® mode of operation
Ground or air heat are alternatively used after specifying a bivalence
point.
ThermSelect® Pro mode of operation
Ground and/or air heat are used in parallel or alternatively.
ThermSelect® Sun mode of operation
Ground or air heat are alternatively used on the source side and so-
lar heat on the sink side.
ThermSelect® Sun Pro mode of operation
Ground and air heat plus solar heat are used on the source side, so-
lar heat is fed into the heat sink if there is an excess.
Inner part:
- Combined, space-saving air-brine/water heat pump hybrid system
in a compact design with 2 integrated, weather-controlled heat
pump controllers
- Size width x depth x height
•Version 1:: 690x600x900
•Version 2: 1,030x730x900
- Quiet running through sound-decoupled cooling unit, low noise de-
velopment through sound-decoupled compressor and sound-
insulated housing
- High-performance evaporator for brine operation
- Outdoor temperature sensor, as well as flow and return heat pump
sensors, heat source inlet air, heat source inlet and outlet brine,
evaporation, suction gas, refrigerant liquid and hot water sensor
included in the scope of delivery
- Refrigerant R 407 C for heating water temperatures up to 55 °C at
outside temperatures up to -7 °C
- Min. outside temperature -15 °C (constant mode)
Outer part
- Air evaporator with enlarged lamella spacing, as well as under-
cooling coil, drip plate heating, bend and expansion valve
- Whisper ventilator with highly efficient electronic motor
- Weather-resistant design with snow protection roof
- Colour: Light-grey (RAL 7035)
- Condensation drainage on gravel bed

4. General ThermSelect®
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4.2 What is included
- Heat pump with interior and exterior unit, including 2 heat pump
controllers RVS 61.483 and 2 control units AVS 37.294
- From ThermSelect 10 soft-start control
- Module for thawing the split evaporator via hot-gas bypass con-
trols
4.3 Accessories
Control unit QAA 75
94.88147-5019 Cable-linked control unit optionally usable as a control unit, service
device or room device. Setting of all parameters in the RVS control-
ler, mode reserve for time greater than 12 hours
Control unit QAA 78
94.88147-5021 Radio-linked control unit optionally usable as a control unit, service
device or room device. Setting of all parameters in the RVS control-
ler, range of radio link approx. 30 m
Radio module AVS 13.399/201
94.88147-5022 Transmitter and receiver for external temperature sensor QAC 34
Repeater AVS 14.390/101
94.88147-5017 Range expansion for controller RVS 61.843
The radio repeater is used for rand expansion. It is not an amplifier,
but rather, a device for receiving and forwarding signals.
Contact temperature sensor
QAD 36.101
94.19314-5015 NTC 10 kOhm

ThermSelect® 4. General
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Service water sensor QAZ 36
94.19314-5013 (2 m)
94.19314-5012 (6 m) Service water sensor QAZ 36 for recording the hot water storage
temperature for Boiler Management Unit LMU and RVS with con-
nection cable 2x0.5 mm², NTC 10 kOhm, 10000 Ohm at 25°C.
Collector sensor QAZ 36.481/101
94.19314-5018 (1.5 m) For RVS or LMU
Additional heater 6.0 kW
98.38400-6302 Additional electric heater 6.0 kW (3 x 2 kW, 400 V) incl. contactor
and connection cable set for controller RVS 61.843
Reservoir Heat pumps require special reservoirs. MHG carries all required
special high-capacity buffer and zone reservoirs in its program.

5. Technical Data ThermSelect®
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5 Technical data
5.1 Dimensions and connection
ratings
Connections at rear wall of heat pump
Sk09-6200-023_a
Stand: 06.11.09
Fig. 1: Connections at rear wall of heat pump ThermSelect 15
(Version 1)
schematic diagram. The device illustrated does not cor-
respond to the supplied interior unit.
Fig. 2: Connections at rear wall of heat pump ThermSelect 19 to
41 (Version 2)