LI 28TES - Heat pump DIMPLEX - Free user manual and instructions

USER MANUAL LI 28TES DIMPLEX

When operating or maintaining a heat pump, the legalrequirements of the country where the heat pump is operatedapply. Depending on the refrigerant quantity, the heat pumpmust be inspected for leaks at regular intervals by a certifiedtechnician, and these inspections must be recorded. ATTENTION!

When transporting the heat pump, ensure that it is not tiltedmore than 45° (in any direction). ATTENTION!

The heat pump and transport pallet are only joined by thepacking film. ATTENTION!

The transport securing device is to be removed prior tocommissioning. ATTENTION!

Do not restrict or block the area around the air intake or outlet. ATTENTION!

Only operate the heat pump with the air ducts connected. ATTENTION!

Ensure that there is a clockwise rotating field: With incorrectwiring the starting of the heat pump is prevented. Acorresponding warning is indicated on the display of the heatpump manager (adjust wiring). ATTENTION!

It is not permitted to connect more than one electronicallyregulated circulating pump via a relay output. ATTENTION!

Operating the heat pump at low system temperatures maycause the heat pump to break down completely. ATTENTION!

Before opening the device, ensure that all circuits are isolatedfrom the power supply. ATTENTION!

Any work on the heat pump may only be performed byauthorised and qualified after-sales service technicians.

This device is only intended for use as specified by the manu-facturer. Any other use beyond that intended by the manufac- turer is prohibited. This requires the user to abide by the rele- vant project planning documents.. Please refrain fromtampering with or altering the device.

1.3 Legal Regulations and

Directives This heat pump is designed for use in a domestic environmentaccording to Article 1, Paragraph 2 k) of EU directive 2006/42/EC (machinery directive) and is thus subject to the require-ments of EU directive 2014/35/EU (low-voltage directive). It isthus also intended for use by non-professionals for heatingshops, offices and other similar working environments, in agri-cultural establishments and in hotels, guest houses and similar/ other residential buildings.The construction and design of the heat pump complies with allrelevant EU directives, DIN/VDE regulations (see CE declarationof conformity).When connecting the heat pump to the power supply, the rele-vant VDE, EN and IEC standards are to be fulfilled. Any furtherconnection requirements stipulated by local utility companiesmust also be observed.When connecting the heating system, all applicable regulationsmust also be adhered to.This unit can be used by children aged 8 and over and by per-sons with limited physical, sensory or mental aptitude or lack ofexperience and/or knowledge, providing they are supervised orhave been instructed in the safe use of the unit and understandthe associated potential dangers.Children must not play with the device. Cleaning and usermaintenance must not be carried out by children without su-pervision. ATTENTION!

When operating or maintaining a heat pump, the legalrequirements of the country where the heat pump is operatedapply. Depending on the refrigerant quantity, the heat pumpmust be inspected for leaks at regular intervals by a certifiedtechnician, and these inspections must be recorded.More information can be found in the accompanying log book.www.gdts.one 452161.66.22 · FD 9912 EN-3 LI 20TES - LI 28TES English

1.4 Energy-Efficient Use of the Heat

Pump With the purchase of this heat pump you are helping to protectthe environment. A prerequisite for energy-efficient operationis the correct design of the heat source system and heating sys-tem (radiators and circulation pump).It is particularly important for the efficiency of a heat pump tokeep the temperature difference between heating water andheat source as small as possible. For this reason, it is advisableto design the heat source and heating system very carefully. Atemperature difference of approx. one Kelvin increases thepower consumption by around 2.5 %. When designing theheating system, it should be borne in mind that special con-sumers such as e.g. hot water preparation should also be con-sidered and dimensioned for low temperatures. Underfloorheating systems (panel heating) are optimally suited for heatpump use on account of the low flow temperatures (30 °C to40 °C). It is important to ensure that the heat exchangers are not con-taminated during operation because this increases the temper-ature difference, in turn reducing the COP.Correct adjustment of the heat pump manager is also impor-tant for energy-efficient use of the heat pump. Further informa-tion can be found in the heat pump manager's operating in-structions. 2 Purpose of the Heat Pump

The air-to-water heat pump is to be used exclusively for theheating of heating water. It can be used in newly built or previ-ously existing heating systems.The heat pump is suitable for mono energy and bivalent opera-tion down to an external temperature of -20 °C.Proper defrosting of the evaporator is guaranteed by maintain-ing a heating water return flow temperature of more than 18 °Cduring continuous operation.The heat pump is not designed for the increased heat con-sumption required when a building is being dried out. The addi-tional heat consumption should be met using special devicesprovided by the customer. If a building is to be dried out in au-tumn or winter, we recommend installing an additional heatingelement (available as an accessory). NOTE

The device is not suitable for operation with a frequencyconverter.

2.2 Operating Principle

Outside air is drawn in by the ventilator and fed via the evapora- tor (heat exchanger). The evaporator cools the air, i.e. it extracts heat from it. This extracted heat is then transferred to the work-ing medium (refrigerant) in the evaporator.The heat is “pumped” to a higher temperature level by in-creasing its pressure with the aid of the electrically driven com-pressors. It is then transferred to the heating water using theliquifier (heat exchanger).Electrical energy is used to raise the temperature of the heat inthe environment to a higher level. Because the energy ex- tracted from the air is transferred to the heating water, this type of device is called an air-to-water heat pump.The air-to-water heat pump consists of the main componentsevaporator, ventilator and expansion valve, as well as the low-noise compressors, liquifier and electrical control system.At low ambient temperatures, humidity accumulates on theevaporator in the form of frost, reducing the transfer of heat.Uneven accumulation during this process does not indicate afault. The evaporator is defrosted automatically by the heatpump as required. Steam may be emitted from the air outlet de-pending on the atmospheric conditions.EN-4 452161.66.22 · FD 9912 www.gdts.one English LI 20TES - LI 28TES 3 Scope of Delivery

The heat pump contains the components listed below. The refrigeration circuit is "hermetically sealed" and contains the fluorinated refrigerant R410A included in the Kyoto proto-col. Information on the GWP value and CO equivalent of therefrigerant can be found in the chapter Device information. Therefrigerant is CFC-free, non-ozone depleting and non-combus-tible.1) Evaporator2) Ventilator3) Switch box4) Filter dryer5) Liquifier6) Expansion valve7) Compressor

The switch box is located in the heat pump. It can be swung outafter removing the lower front cover and loosening the fasten-ing screw located in the upper right-hand corner.The switch box contains the supply connection terminals, aswell the power contactors, the soft starter unit and the heatpump manager.The heat pump manager is a convenient electronic regulationand control device. It controls and monitors the entire heatingsystem on the basis of the external temperature, including hotwater preparation and safety systems.The customer must install the external temperature sensor,which is included in the scope of supply of the heat pump man-ager together with the necessary fixing accessories.The enclosed operating instructions describe the function anduse of the heat pump manager. 4 Accessories

A remote control adds convenience and is available as a specialaccessory. Operation and menu navigation are identical tothose of the heat pump manager. Connection takes place via aninterface (special accessories) with RJ 12 Western plug. NOTE

In the case of heating controllers with a removable operatingelement, this can also be used directly as a remote control.

4.2 Building management

technology The heat pump manager can be connected to a building man-agement system network via supplementation of the relevantinterface plug-in card. The supplementary installation instruc-tions of the interface card must be consulted regarding theexact connection and parameterisation of the interface. The following network connections can be made on the heatpump manager: Modbus EIB, KNX Ethernet

The thermal energy meter (WMZ 25/32) is used for measuring the quantity of thermal energy supplied. It is available as an ac- cessory. Due to the additional heat exchanger, two thermal en-ergy meters are required for measuring the quantity of thermalenergy.Sensors in the flow and return of the heat exchanger pipes andan electronics module acquire the measured values and trans-mit a signal to the heat pump manager, which, depending onthe current operating mode of the heat pump (heating/DHW/swimming pool), totals the thermal energy in kWh and displaysthem in the operating data and history menu. NOTE

The thermal energy meter complies with the qualityrequirements of the German market incentive programmesubsidising efficient heat pumps. The thermal energy meter isnot subject to obligatory calibration, and can thus not be usedfor the heating cost billing procedure!

4.3.2 Hydraulic and electrical integration of

the thermal energy meter The thermal energy meter requires two measuring devices fordata acquisition. A measuring tube for the flow measurement This must be installed in the heat pump flow (observe flowdirection). A temperature sensor (copper pipe with immersion sleeve)This must be installed in the heat pump return.The installation locations for both measuring tubes should beas close to the heat pump as possible in the generator circuit. To avoid eddying effects which could lead to incorrect meas-urements, there should be a gap of 50 cm between the meas-uring devices and other installed components such as pumpsor valves. 5 Transport ATTENTION!

When transporting the heat pump, ensure that it is not tiltedmore than 45° (in any direction). Use a pallet for transporting the heat pump to the final installa- tion location. The basic device can be transported with a lifttruck, hand truck or by means of 3/4" pipes fed through theholes in the base plate or frame. ATTENTION!

The heat pump and transport pallet are only joined by thepacking film.Before using the transport holes in the frame, it is necessary toremove the lower side panel assemblies. This is done by loosen-ing each of the two screws at the base and then withdrawingthe panels by unhooking them from above. Rehang the panelsby gently pushing them in an upwards direction.Be careful not to damage any components when inserting thepipes through the frame.After the transport, the transport securing device is to be re-moved on either side at the bottom of the unit. ATTENTION!

The transport securing device is to be removed prior tocommissioning. Thermal energy meter casing - electronicsin the heating flowin the heating return flowPulse, thermal energy meterL / N / PE230 V / 50 Hz N1 / ID12G/24 V AC Opening the cover Closing the cover

6.1 General Information

The air-to-water heat pump must be installed in a frost-free,dry room on an even, smooth and horizontal surface. The entirebase of the frame should lie directly on the floor to ensure anadequate soundproof seal. T If this is not the case, additionalsound insulation measures may be necessary. If the device isinstalled on top of a built-under buffer tank, a surface that fullysupports the base is required. The heat pump must be installedso that maintenance work can be carried out without being hin-dered. This is ensured if the clearance displayed below is main-tained.Never install the device in rooms subject to high humidity. Con- densation can form on the heat pump and air circuit if the hu- midity exceeds 50% and the external temperature is below 0°C. Neither frost nor temperatures higher than 35 °C must occur inthe installation location at any time of the year.If the heat pump is installed on an upper storey, the load-bear-ing capacity of the ceiling should be checked. On account ofthe acoustics, measures for isolating possible vibrations shouldalso be very carefully planned in advance as well. Installation ona wooden floor is not recommended.

6.2 Condensed Water Pipe

Condensate that forms during operation must be drained offfrost-free. To ensure proper drainage, the heat pump must bemounted horizontally. The condensate pipe must have a mini-mum diameter of 50 mm and must be fed into a sewer in sucha way that it is safe from frost. Do not discharge the condensatedirectly into clearing tanks or cesspits, as aggressive vapours ora condensed water pipe which has not been laid in a frost-freemanner could destroy the evaporator.

To prevent solid-borne sound from being transmitted to theheating system, we recommend connecting the heat pump tothe heating system using a flexible hose.Installed air ducts should be sound-isolated from the heatpump to prevent the transmission of solid-borne sound to theducts. 7 Installation

7.1 General Information

The following connections need to be established on the heatpump: Fresh and exhaust air Flow and return flow of the heating system Condensate outflow Temperature sensor Voltage supply

Do not restrict or block the area around the air intake or outlet. ATTENTION!

Only operate the heat pump with the air ducts connected.The glass fibre reinforced concrete air ducts offered as acces-sories are moisture-resistant and diffusion-free.The sealing collar is used to seal the air ducts on the heat pump.The air ducts are not screwed directly onto the heat pump. Onlythe rubber seal comes into direct contact with the heat pumpwhen the system is installed correctly. This guarantees easy as-sembly and disassembly of the heat pump and also ensuresthat solid-borne sound is well insulated. If another type of air duct is used, observe the external and in-ternal dimensions as specified in the figure. Also ensure that thevibration and duct insulation are adequate.If flange-mounted air ducts are used, connecting stubs are se-cured on the air inlet and air outlet sides of the evaporator with4 M8x16 hexagon bolts in the threaded holes provided. Whendoing this, ensure that both air duct stubs only touch the insu-lation. There should be no contact with the external sheeting. 0,6 m 0,2 m0,6 mwww.gdts.one 452161.66.22 · FD 9912 EN-7 LI 20TES - LI 28TES English The values in parentheses are valid for the LI 24TES/ LI 28TES

7.2.2 Changing the direction of air flow

The direction of air flow of the device can be changed by re- versing the fan. The change in the air circuit must be taken into account when planning the plant. The specifications for the air intake and air extract opening in this manual remain unchanged. ATTENTION!

Before opening the device, ensure that all circuits are isolated from the power supply. ATTENTION!

Work on the heat pump may only be carried out by authorised and qualified after-sales service technicians. To do this:

1) Remove the front panels from the bottom to the top.

3) Pull the supply cable inwards through the terminal box and

4) Loosen the nut and washers on the four corners of the fan.

5) Pull the fan gently inside the device and pull it out through

the front of the device. Protect evaporators from damage.

6) Pull out the spacer tube from the mounting bolts at the

7) Cut out a square in the device insulation on the right air

vent opening along the existing perforation so it matches the left side.

8) Insert the fan with reverse direction of air flow back into the

device from the front and insert onto the screws on the right. Check the position of the cable entry. Protect evapo- rators from damage.

9) Insert the spacer tube onto the mounting bolts and tighten

the fan with the washers and nuts at the four corners.

10) Feed the cable as illustrated through the nozzle panel and

terminal box and tighten the screws.

11) Connect the cables in the terminal box of the fan (see dia-

gram for connection, comply with clockwise field of rota- tion) and screw on the terminal box lid.

12) Ensure that there are no leaks in the terminal box and all

13) Screw on the panels.

7.3 Heating System Connection

The heating system connections on the heat pump have a 1 ¼"external thread. Use a spanner to firmly grip the transitionswhen connecting the heat pump.Before connecting the heating water system to the heat pump,the heating system must be flushed to remove any impurities,residue from sealants, etc. Any accumulation of deposits in theliquifier could cause the heat pump to completely break down.For systems in which the heating water flow can be shut off viathe radiator or thermostat valves, an overflow valve must be in-stalled in a heating bypass behind the heat pump by the cus-tomer. This ensures a minimum heating water flow rate throughthe heat pump and helps to avoid faults.Once the heating system has been installed, it must be filled,de-aerated and pressure-tested.Consideration must be given to the following when filling thesystem: Untreated filling water and make-up water must be of drinking water quality (colourless, clear, free from sedi-ments) Filling water and make-up water must be pre-filtered (pore size max. 5 µm).Scale formation in domestic hot water heating systems cannotbe avoided, but in systems with flow temperatures below 60 °C,the problem can be disregarded. With high-temperature heatpumps and in particular with bivalent systems in the higher per-formance range (heat pump + boiler combination), flow tem-peratures of 60 °C and more can be achieved. The followingstandard values should therefore be adhered to with regard tothe filling and make-up water according to VDI 2035, sheet 1:The total hardness values can be found in the table.Fig. 7.1:Guideline values for filling and make-up water in accordance withVDI 2035For systems with an above-average specific system volume of50 l/kW, VDI 2035 recommends using fully demineralizedwater and a pH stabiliser to minimize the risk of corrosion in theheat pump and the heating system. ATTENTION!

With fully demineralized water, it is important to ensure thatthe minimum permissible pH value of 7.5 (minimumpermissible value for copper) is complied with. Failure tocomply with this value can result in the heat pump beingdestroyed. Minimum heating water flow rate The minimum heating water flow rate through the heat pumpmust be assured in all operating states of the heating system.This can be accomplished, for example, by installing either adual differential pressureless manifold or an overflow valve. Theprocedure for setting an overflow valve is described in thechapter "Start-up". When the minimum heating water flow rateis undershot, the plate heat exchanger in the refrigeration cir-cuit can freeze, which can lead to total loss of the heat pump.The nominal flow rate is specified depending on the max. flowtemperature in the device information and must be taken intoaccount during planning. With design temperatures below 30 Cin the flow, the design must be based on the max. volume flowwith 5 K spread for A7/W35.The specified nominal flow rate (See “Device Information” onpage 13.) must be guaranteed in every operating status. An in-stalled flow rate switch is used only for switching off the heatpump in the event of an unusual and abrupt drop in the heatingwater flow rate and not to monitor and safeguard the nominalflow rate. NOTE

The use of an overflow valve is only recommended for panelheating and a max. heating water flow of 1.3 m³/h. Systemfaults may result if this is not observed. Antifreeze Heat pump systems, which cannot be guaranteed to be frost-free, should be equipped with a drainage option (see Fig.).Theantifreeze function of the heat pump manager is active when-ever the heat pump manager and the heat circulating pump areready for operation. If the heat pump is taken out of service orin the event of a power failure, the system has to be drained.The heating circuit should be operated with a suitable anti-freeze if heat pump systems are implemented in buildingswhere a power failure can not be detected (holiday home).

7.4 Temperature sensor

The following temperature sensors are already installed or mustbe installed additionally: External temperature sensor (R1) supplied (NTC-2) Return temperature sensor (R2) installed (NTC-10) Flow temperature sensor (R9) installed (NTC-10)Total heat output in kWTotal alkaline earths in mol/m³ and/or mmol/lSpecific system volume (VDI 2035) in l/kW < 20 20 < 50 50 Total hardness in °dH < 50 2.0 16.8 11.2< 0.11

1. This value lies outside the permissible value for heat exchangers in heat

pumps.www.gdts.one 452161.66.22 · FD 9912 EN-9 LI 20TES - LI 28TES English

7.4.1 Sensor characteristic curves

The temperature sensors to be connected to the heat pump manager must correspond to the sensor characteristic curve illustrated in Fig.7.2 on pag. 9. The only exception is the external temperature sensor included in the scope of supply of the heat pump (see Fig.7.3 on pag. 9) Fig. 7.2:Sensor characteristic curve NTC-10 Fig. 7.3:Sensor characteristic curve, NTC-2 according to DIN 44574 Ex- ternal temperature sensor

7.4.2 Mounting the external temperature

sensor The temperature sensor must be mounted in such a way that all weather conditions are taken into consideration and the measured value is not falsified. Mount on the external wall on the north or north-west side where possible Do not install in a “sheltered position” (e.g. in a wall niche or under a balcony) Not in the vicinity of windows, doors, exhaust air vents, external lighting or heat pumps Not to be exposed to direct sunlight at any time of year

It is only necessary to mount the strap-on sensors if they are included in the scope of supply of the heat pump but have not yet been installed. The strap-on sensors can be fitted as pipe-mounted sensors or installed in the immersion sleeve of the compact manifold. Mounting as a pipe-mounted sensor Remove paint, rust and scale from heating pipe. Coat the cleaned surface with heat transfer compound (apply sparingly). Attach the sensor with a hose clip (tighten firmly, as loose sensors can cause malfunctions) and thermally insulate.

7.4.4 Hydraulic distribution system

The compact manifold and the dual differential pressureless manifold function as an interface between the heat pump, the heating distribution system, the buffer tank and, in some cases, even the hot water cylinder. A compact system is used to simplify the installation process, so that a lot of different components do not have to be installed individually. Further information can be found in the relevant installation instructions. Compact manifold The return sensor can remain in the heat pump, or should be installed in the immersion sleeve. The remaining empty space between the sensor and the immersion sleeve must be filled completely with heat transfer compound. dual differential pressureless manifold In order for the heating circuit pumps of the generator and consumer circuits to supply the flow to the return sensor, this must be installed in the immersion sleeve of the dual differential pressureless manifold. Temperature in °C -20 -15 -10 -5 0 5 10 NTC-2 in k 14.6 11.4 8.9 7.1 5.6 4.5 3.7 NTC-10 in k 67.7 53.4 42.3 33.9 27.3 22.1 18.0

7.5 Electrical connection

All electrical connection work must be carried out by a trained electrician or a specialist for the specified tasks in accordance with the installation and operating instructions, country-specific installation regulations (e.g. VDE 0100), technical connection conditions of the energy suppliers and supply grid operators (e.g. TAB) and local conditions. To ensure that the frost protection function of the heat pump works properly, the heat pump manager must remain con- nected to the power supply and the flow must be maintained through the heat pump at all times. The switching contacts of the output relay are interference- suppressed. Therefore, depending on the internal resistance of the measuring instrument, a voltage can also be measured when the contacts are open. However, this will be much lower than the line voltage. Extra-low voltage is connected to controller terminals N1-J1 to N1-J11, N1-J24 to N1-J26 and terminal strip X3. If, due to a wiring error, the line voltage is mistakenly connected to these terminals, the heat pump manager will be destroyed.

7.5.2 Electrical installation

1) The electric supply cable for the output section of the heat

pump (up to 4-core) is fed from the electricity meter of the heat pump via the utility blocking contactor (if required) into the heat pump (see heat pump operating instructions for supply voltage). An all-pole disconnecting device with a contact gap of at least 3 mm (e.g. utility blocking contactor or power contac- tor) and an all-pole circuit breaker with common tripping for all external conductors must be installed in the power supply for the heat pump (tripping current and characteris- tic in compliance with the device information). When connecting the device, ensure that the incoming supply has a clockwise rotating field L1; L2; L3. ATTENTION!

Ensure that there is a clockwise rotating field: With incorrect wiring the starting of the heat pump is prevented. A corresponding warning is indicated on the display of the heat pump manager (adjust wiring). For detailed information, refer to the circuit diagrams in the appendix.

2) The three-core electic supply cable for the heat pump

manager (heating controller N1) is fed into the heat pump. The correct control voltage must be ensured according to the type plate. The (L/N/PE~230 V, 50 Hz) supply cable for the heat pump manager must have a constant voltage. For this reason, it should be tapped upstream from the utility blocking contactor or be connected to the household current, as important protection functions may otherwise be lost during a utility block.

3) The utility blocking contactor (K22) with 3 main contacts

(1/3/5 // 2/4/6) and an auxiliary contact (NO contact 13/

14) should be dimensioned according to the heat pump

output and must be supplied by the customer. The NO contact of the utility blocking contactor (13/14) is looped from terminal strip X3/G to connector terminal N1- J5/ID3. CAUTION! Extra-low voltage!

4) The contactor (K21) for the flange heater (E9) in the hot

water cylinder should be dimensioned according to the radiator output and must be supplied by the customer. It is controlled (230 V AC) by the heat pump manager via terminals X2/N and N1-J16/NO10.

5) The contactors mentioned above in points 3 and 4 are

installed in the electrical distribution system. Mains cables for the installed heaters must be laid and secured in accordance with the valid standards and regulations.

6) All installed electric cables must have permanent wiring.

7) The heat circulating pump (M13) is activated via the con-

tact N1-J13/NO5. The connection points for the pump are X2/M13 and X2/N. When using pumps where the switch- ing capacity exceeds the output, a coupling relay must be interposed.

8) The auxiliary circulating pump (M16) is activated via the

contact N1-J16/NO9. The connection points for the pump are X2/M16 and X2/N. A coupling relay is already integrated in this output.

9) The domestic hot water circulating pump (M18) is acti-

vated via the contact N1-J18/NO6. The connection points for the pump are X2/M18 and X2/N. When using pumps where the switching capacity exceeds the output, a cou- pling relay must be interposed.

10) The return sensor (R2) is integrated into air-to-water heat

pumps for indoor installation. The connection to the HPM is at terminals X3/GND and N1-J2/U2.

11) The external sensor (R1) is connected to terminals X3/GND

12) The domestic hot water sensor (R3) is included with the

domestic hot water cylinder and is connected to terminals X3/ GND and N1-J2/U3.

7.5.3 Connecting an electronically

regulated circulating pump Electronically regulated circulating pumps have high starting currents, which may shorten the service life of the heat pump manager. A coupling relay is therefore installed or must be in- stalled between the output of the heat pump manager and the electronically regulated circulating pump. This is not necessary if the maximum permissible operating current of the heat pump manager of 2 A and the maximum permissible starting current of the heat pump manager of 12 A are not exceeded by the electronically regulated circulating pump or a relevant approval has been issued by the pump manufacturer. ATTENTION!

It is not permitted to connect more than one electronically regulated circulating pump via a relay output.www.gdts.one 452161.66.22 · FD 9912 EN-11 LI 20TES - LI 28TES English 8Start-UP

8.1 General Information

To ensure that start-up is performed correctly, it should only becarried out by an after-sales service technician authorised bythe manufacturer. These measures can also include an addi-tional warranty under certain conditions (see Warranty).

The following items need to be checked prior to start-up: All of the heat pump connections must be established as described in Chapter 6. All valves that could impair the proper flow of the heating water in the heating circuit must be open. The air intake and air outlet paths must be clear. The ventilator must turn in the direction indicated by the arrow. The settings of the heat pump manager must be adapted to the heating system in accordance with the controller’soperating instructions. Ensure the condensate outflow functions.

The heat pump is started up via the heat pump manager. Ad-justments should be made in compliance with the instructions. At hot water temperatures under 7 °C, start-up is not possible.The water in the buffer tank must be heated to a minimum of18 °C with the second heat generator.To ensure a problem-free start-up, the following procedure is tobe implemented:1) Close all consumer circuits.2) Ensure that the heat pump has the correct water flow.3) Use the manager to select the automatic operating mode.4) In the special functions menu, start the "Start-up" program.5) Wait until a return temperature of at least 25 °C has beenreached.6) Now slowly reopen the heating circuit valves in successionso that the heating water flow is constantly raised byslightly opening the respective heating circuit. The heatingwater temperature in the buffer tank must not be allowedto drop below 20 °C during this process. This ensures thatthe heat pump can be defrosted at any time.7) When all heat circuits are fully open and a return tempera-ture of at least 18 °C is maintained, the heat pump start-upis complete. ATTENTION!

Operating the heat pump at low system temperatures maycause the heat pump to break down completely. 9 Maintenance / Cleaning

To protect the paintwork, avoid leaning or putting objects onthe device. External heat pump parts can be wiped with a dampcloth and domestic cleaner. NOTE

Never use cleaning agents containing sand, soda, acid orchloride as these can damage the surfaces.To prevent faults due to sediment in the heat exchanger of theheat pump, ensure that the heat exchanger in the heating sys-tem can not be contaminated. We recommend protecting theevaporator by installing a bird guard in the inlet duct. At least80% of the cross section of the grating should be open. In theevent that operating malfunctions due to contamination stilloccur, the system should be cleaned as described below.

9.2 Cleaning the Heating System

The ingress of oxygen into the heating water circuit may resultin the formation of oxidation products (rust), particularly if steelcomponents are used. These products enter the heating sys-tem via the valves, the circulating pumps and/or plastic pipes. Itis therefore essential - in particular with respect to the piping ofunderfloor heating systems - that only diffusion-proof materialsare used. NOTE

We recommend the installation of a suitable corrosionprotection system to prevent the formation of deposits (e.g.rust) in the condenser of the heat pump.Residue from lubricants and sealants may also contaminate theheating water.In the case of severe contamination leading to a reduction inthe performance of the liquifier in the heat pump, the systemmust be cleaned by a heating technician.According to today's state of knowledge, we recommend usinga 5 % phosphoric acid solution for cleaning purposes. However,if cleaning needs to be performed more frequently, a 5 % for-mic acid solution should be used.In either case, the cleaning fluid should be at room tempera-ture. We recommend flushing the heat exchanger in the direc-tion opposite to the normal flow direction.To prevent acidic cleaning agents from entering the heatingsystem circuit, we recommend connecting the flushing devicedirectly to the flow and return flow of the liquifier of the heatpump.It is important that the system be thoroughly flushed using ap-propriate neutralising agents to prevent any damage frombeing caused by cleaning agent residue remaining in the sys- tem. Acids must be used with great care and all relevant regulationsof the employers' liability insurance associations must be ad-hered to.The manufacturer's instruc4tions regarding cleaning agentmust be complied with at all times.EN-12 452161.66.22 · FD 9912 www.gdts.one English LI 20TES - LI 28TES

9.3 Cleaning the Air System

Air ducts, evaporator, ventilator and condensate outflow shouldbe cleaned of contamination (leaves, twigs, etc.) before theheating period. Do this by opening the front of the heat pump.The bottom should be opened first followed by the top. ATTENTION!

Before opening the device, ensure that all circuits are isolatedfrom the power supply.Remove and rehang the side panel assemblies as described inChapter 4.To prevent the evaporator and the condensate tray from beingdamaged, do not use hard or sharp objects for cleaning. 10 Faults / Trouble-Shooting This heat pump is a quality product and is designed for trouble-free operation. In the event that a fault should occur, it will beshown on the heat pump manager display. Simply consult theFaults and Trouble-shooting page in the operating instructionsof the heat pump manager. If you cannot correct the fault your-self, please contact your after-sales service technician. ATTENTION!

Any work on the heat pump may only be performed byauthorised and qualified after-sales service technicians. 11 Decommissioning/Disposal Before removing the heat pump, disconnect it from the powersource and close all valves. The heat pump must be installed bytrained personnel. Observe all environmentally-relevant re-quirements regarding the recovery, recycling and disposal ofmaterials and components in accordance with all applicablestandards. Particular attention should be paid to the proper dis-posal of refrigerants and refrigeration oils.www.gdts.one 452161.66.22 · FD 9912 EN-13 LI 20TES - LI 28TES English 12 Device Information 1 Type and order code

Integrated Integrated Integrated

2.3 Thermal energy metering

Optional (as an accessory) Optional (as an accessory) Optional (as an accessory)

3.1 Heating water flow / return ° C up to 60 ± 2 / from 18 up to 60 ± 2 / from 18 up to 60 ± 2 / from 18

3.2 Air ° C -20 to +35 -20 to +35 -20 to +35

4.1 Heating water flow internal pressure differential

to EN 14511 m³/h / Pa 3.6 / 25200 4.5 / 14700 5.3 / 21000 Minimum heating water flow m³/h / Pa 1.7 / 6000 2.4 / 4200 2.8 / 6000

4.2 Sound power level according to EN 12102

4.3 Sound pressure level at a distance of 1 m indoors

5.3 Device connections for heating system Inches R 1¼“ R 1¼“ R 1¼“

5.9 Volume of heating water in device litres 3.8 4.6 5.1

6 Electrical connection

6.1 Supply voltage; fuse protection

6.3 Degree of protection according to EN 60 529 IP 21 IP 21 IP 21

6.4 Starting current limiter Soft starter Soft starter Soft starter

6.5 Rotary field monitoring yes yes yes

6.6 Starting current A 19 23 28

6.7 Nominal power consumption at A7/W35 /

6.9 Power consumption of compressor protection

7 Complies with the European safety regulations

8.1 Type of defrosting Reverse circulation Reverse circulation Reverse circulation

8.2 Frost protection condensate tray /

water in device protected against freezing

at A-7 / W55 kW / ---

at A7 / W35 kW / ---

at A7 / W45 kW / ---

at A10 / W35 kW / ---

1. The specified sound levels apply if the supporting feet (available as an option) are not used. If the supporting feet are used, the level can increase by up to 3db (A). 2. The specified sound pressure level corresponds to the operating noise of the heat pump in heating operation with a flow temperature of 35 °C. The specified sound pressure level represents the free sound area level. The measured value can deviate by up to 16 dB(A), depending on the installation location.

3. Please note that additional space is required for pipe connections, operation and maintenance.

4. These data indicate the size and capacity of the system according to EN 14511. For an analysis of the economic and energy efficiency of the system, the bivalence point and regulation should be taken into consideration. These specifications can only be achieved with clean heat exchangers. Information on maintenance, commissioning and oper- ation can be found in the respective sections of the installation and operating instructions. The specified values have the following meaning, e.g. A7 / W35: Heat source tem- perature 7 °C and heating water flow temperature 35 °C.

5. See CE declaration of conformity

6. The heat circulating pump and the heat pump manager must always be ready for operation.

7. Operation with 2 compressors.

8. Operation with 1 compressor.www.gdts.one 452161.66.22 · FD 9912 EN-15

LI 20TES - LI 28TES English 13 Product information as per Regulation (EU) No 813/ 2013, Annex II, Table 2 Information requirements for heat pump space heaters and heat pump combination heaters

biv -10 °C For air-to-water heat pumps: Operation limit temperature

Cycling interval capacity for heating Pcych - kW Cycling interval efficiency COPcyc

Degradation co-efficient (**) Cdh 0,90 - Heating water operating limit temperature WTOL 60 °C Power consumption in modes other than active mode

Supplementary heater Off mode

Capacity control fixed

m³ /h Sound power level, indoors/ outdoors

Water heating energy efficiency

Daily electricity consumption

elec - kWh Daily fuel consumption

Brine-to-water heat pump

Equipped with a supplementary heater

Heat pump combination heater

Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application. Rated heat output (*) Prated 12 kW Seasonal space heating energy efficiency

Parameters shall be declared for average climate conditions: For air-to-water heat pumps: Rated air flow rate, outdoors For water-/brine-to-water heat pumps: Rated brine or water flow rate, outdoor heat exchanger Declared capacity for heating foer part load at indoor temperature 20°C and outdoor temperature Tj Declared coefficient of performance or primary energy ratio for part load at indoor temperature 20 °C and outdoor temperature Tj For heat pump combination heater: Glen Dimplex Deutschland GmbH, Am Goldenen Feld 18, 95326 Kulmbach (*) For heat pump space heaters and heat pump combination heaters, the rated output Prated is equal to the design load for heating Pdesignh , and the rated heat output of a supplementary capacity for heating sup(Tj ).EN-16 452161.66.22 · FD 9912 www.gdts.one English LI 20TES - LI 28TES Information requirements for heat pump space heaters and heat pump combination heaters

biv -10 °C For air-to-water heat pumps: Operation limit temperature

Cycling interval capacity for heating Pcych - kW Cycling interval efficiency COPcyc

Degradation co-efficient (**) Cdh 0,90 - Heating water operating limit temperature WTOL 61 °C Power consumption in modes other than active mode

Supplementary heater Off mode

Capacity control fixed

m³ /h Sound power level, indoors/ outdoors

Water heating energy efficiency

Daily electricity consumption

elec - kWh Daily fuel consumption

kWh Contact details (**) If Cdh is not determined by measurement nthen the default degradation is Cdh = 0,9 (--) not applicable Model LI 24TES Air-to-water heat pump yes Water-to-water heat pump

Brine-to-water heat pump

Equipped with a supplementary heater

Heat pump combination heater

Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application. Rated heat output (*) Prated 15 kW Seasonal space heating energy efficiency

Parameters shall be declared for average climate conditions: For air-to-water heat pumps: Rated air flow rate, outdoors For water-/brine-to-water heat pumps: Rated brine or water flow rate, outdoor heat exchanger Declared capacity for heating foer part load at indoor temperature 20°C and outdoor temperature Tj Declared coefficient of performance or primary energy ratio for part load at indoor temperature 20 °C and outdoor temperature Tj For heat pump combination heater: Glen Dimplex Deutschland GmbH, Am Goldenen Feld 18, 95326 Kulmbach (*) For heat pump space heaters and heat pump combination heaters, the rated output Prated is equal to the design load for heating Pdesignh , and the rated heat output of a supplementary capacity for heating sup(Tj ).www.gdts.one 452161.66.22 · FD 9912 EN-17 LI 20TES - LI 28TES English Information requirements for heat pump space heaters and heat pump combination heaters

biv -7 °C For air-to-water heat pumps: Operation limit temperature

Cycling interval capacity for heating Pcych - kW Cycling interval efficiency COPcyc

Degradation co-efficient (**) Cdh 0,90 - Heating water operating limit temperature WTOL 60 °C Power consumption in modes other than active mode

Supplementary heater Off mode

Capacity control fixed

m³ /h Sound power level, indoors/ outdoors

Water heating energy efficiency

Daily electricity consumption

elec - kWh Daily fuel consumption

kWh Contact details (**) If Cdh is not determined by measurement nthen the default degradation is Cdh = 0,9 (--) not applicable Model LI 28TES Air-to-water heat pump yes Water-to-water heat pump

Brine-to-water heat pump

Equipped with a supplementary heater

Heat pump combination heater

Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application. Rated heat output (*) Prated 25 kW Seasonal space heating energy efficiency

Heating water return

4x internal thread M

4x internal thread M

/h] Heating water flow rate in [m

/h] Heating water flow rate in [m

/h] Heating water flow rate in [m

Plug-in terminals J1 to J11, J24 to J26 and terminal strip X3, are connected to an extra- low voltage supply. A higher voltage must on no account be connected! ATTENTION !