PROJECT PLANNING MANUAL HEAT PUMPS FOR HEATING AND DOMESTIC HOT WATER PREPARATION I nteractive planning support is available at: www.dimplex.de/en/professional/online-planner lways up-to-date A The current versions of the following planning manuals are available as PDF files at www.dimplex.
The function of the hydro tower D2V technology Watch the 3D animation at Dimplex.DE. The dual differential pressureless manifold consists of two bypass pipes, each with one check valve. Flow through the first manifold is only maintained when the compressor is running. This reduces the pump runtimes and heat losses. The second manifold decouples the consumer circuit and, in combination with the buffer tank connected in series, ensures the minimum runtimes of the heat pump during low heat consumption.
Table of contents Table of contents What are the benefits of a heat pump? ..................................................................................................................5 Glossary....................................................................................................................................................................5 Literature.........................................................................................................................................
Table of contents 3.3.2 3.3.3 Preparation of boreholes....................................................................................................................................................... 43 Filling ground heat exchangers ............................................................................................................................................. 44 3.4 Additional heat source systems for ground heat usage....................................................................
Table of contents 7.6.3 7.6.4 7.6.5 7.6.6 7.6.7 Connection diagram WPM 2006 plus / WPM 2007 plus........................................................................................................ 84 Connection diagram WPM EconPlus .................................................................................................................................... 85 Connection diagram WPM EconSol ...........................................................................................................
Table of contents 9 Online Operating Cost Calculator ................................................................................................................ 130 10 Help with planning and installation.............................................................................................................. 131 10.1 Pipework dimensioner ..................................................................................................................................................................
What are the benefits of a heat pump? What are the benefits of a heat pump? The fact that a large percentage of our energy supply is produced from fossil fuels poses serious consequences for our environment. Large quantities of pollutants, such as sulphur dioxide and nitrogen oxide, are released during combustion.
Glossary Seasonal performance factor Buffer tank The seasonal performance factor is defined as the ratio of the quantity of electrical energy supplied in one year to the amount of thermal energy extracted by the heat pump system. It is based on a particular heating system taking the respective design of that system into consideration (temperature level and temperature difference) and is not the same as the coefficient of performance.
Literature Heating system Heat source The heating system has a significant influence on the efficiency of the heat pump heating system and should function at the lowest possible flow temperatures. It consists of the system used for conveying the heat transfer medium from the warm side of the heat pump to the heat consumers.
Energy content of various types of fuel Greek alphabet α Α alpha ι Ι iota ρ Ρ rho β Β beta κ Κ kappa σ Σ sigma γ Γ gamma λ Λ lambda τ Τ tau δ Δ delta μ Μ mu υ Υ ypsilon ε Ε epsilon ν Ν nu ϕ Φ phi ζ Ζ zeta ξ Ξ xi χ Χ chi η Η eta ο Ο omicron ψ Ψ psi ϑ θ theta π Π pi ω Ω omega Energy content of various types of fuel max.
Conversion tables Powers Prefix Abbreviation Deca da Hecto h Denotation Prefix Abbreviation Denotation 10 1 Deci d 10-1 10 2 Centi c 10-2 3 Milli m 10-3 Kilo k 10 Mega M 106 Micro μ 10-6 Giga G 109 Nano n 10-9 Tera T 1012 Pico p 10-12 P 10 15 Femto f 10-15 E 1018 Atto a 10-18 Peta Exa www.dimplex.de 01.
1 Selection and design of heat pumps 1 Selection and design of heat pumps 1.1 1.1.1 Design of existing heating systems – heat pumps for the renovation market Heat consumption of the building to be heated In the case of existing heating systems, the heat consumption of the building to be heated must be recalculated because the heat output of the existing boiler cannot serve as a gauge for the actual heat consumption.
Selection and design of heat pumps 1.1.
1.1.3 1.1.3 Selection and design of heat pumps Which renovation measures must be carried out for energy-saving heat pump operation? Low temperature Flow temperature for all rooms max. 55 °C If the required flow temperature is below 55 °C, no additional measures are required. Any low-temperature heat pump for flow temperatures up to 55° C can be used.
Selection and design of heat pumps 1.2 1.2.1 1.3.1 Heat pumps for new systems Calculating the heat consumption of the building The maximum hourly heat consumption 4his calculated according to the respective national standards. It is possible to approximately estimate the heat consumption using the living space A (m2) that is to be heated: +HDW FRQVXPSWLRQ >N:@ +HDWHG DUHD >P @ ā 6SHFLILF KHDW FRQVXPSWLRQ >N: P @ T = 0.03 kW/m2 Low-energy house T = 0.
1.3.2 1.3.2 Selection and design of heat pumps Domestic hot water preparation Domestic hot water consumption in buildings depends heavily on usage. For normal comfort requirements, domestic hot water consumption lies at between 80 and 100 litres per person, per day, based on a domestic hot water temperature of 45 °C. In this case, a heat output for domestic hot water preparation of 0.2 kW per person must be taken into account.
Selection and design of heat pumps 1.3.4.2 1.3.4 Determining the heat pump output 1.3.4.1 Air-to-water heat pump (mono energy operation) Air-to-water heat pumps are primarily operated in mono energy systems. The heat pump should fully meet the heat consumption down to an outside temperature (bivalence point) of approx. -5 °C. In the event of very low temperatures and high heat consumption, a second, electrically operated heat generator will be activated.
1.3.4.3 Selection and design of heat pumps The approach is illustrated by the example from Fig. 1.3 on page 15 with a total heat consumption for the house of 11.0 kW at a standard outside temperature of -16 °C and a selected room temperature of +20 °C. The diagram shows the heat output curves of two heat pumps at a heating water flow temperature of 35 °C.
Selection and design of heat pumps 1.3.4.4 1.3.4.7 Design of brine-to-water and water-to-water heat pumps (mono energy operation). Mono energy brine-to-water or water-to-water heat pump systems are equipped with a second electrically operated heat generator, e.g. a buffer tank with an electric heating element. Mono energy brine-to-water or water-to-water heat pump systems should only be planned in exceptional circumstances if shut-off times mean that large quantities of power must be drawn from 1.3.4.
2 Air-to-water heat pumps 2 Air-to-water heat pumps 2.1 Air as heat source Area of application of air-to-water heat pumps General information on the operating limits of air-to-water heat pumps is not possible. The operating limits may differ due to different components in the heat pump or different refrigerants. Areas of application include: ATTENTION! If the condensation is fed into clearing tanks and sewage systems, a siphon is required in order to protect the evaporator from damaging vapours.
Air-to-water heat pumps 2.2 2.2 Air-to-water heat pumps for outdoor installation Costs for outdoor installation Frost-proof foundation Laying insulated heating pipes for flow and return in the ground Installation in a hollow or in an inner courtyard is not permitted because cooled air collects at ground level and is drawn in again by the heat pump during lengthy operation. Laying electrical connecting and main cables in the ground.
2.2.1 2.2.1 Air-to-water heat pumps Parallel connection of air-to-water heat pumps installed outdoors. When parallel connecting air-to-water heat pumps set up outdoors, a minimum distance must be maintained between the individual heat pumps. This is necessary to prevent an air short circuit between the individual heat pumps. The minimum distances for maintenance work specified in the relevant installation instructions must be taken into account.
Air-to-water heat pumps 2.2.3 Legend: 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 6LWH 2. 7UHQFK ZDUQLQJ WDSH FP DERYH FRYHU SLSH 5HFRPPHQGHG FRYHU FP PLQ FP ZLWK 6:/ FP 6DQG ZLWK JUDQXODWLRQ )LOO LQ FP ZLWK VDQG DOO DURXQG WKH FRYHU SLSH Fig. 2.4: 2.2.
2.3 Air-to-water heat pumps Volume flow/pressure drop diagram, heating water connection cable (HVL) 3UHVVXUH GURS LQ 3D P [ [ 3UHVVXUH GURS LQ P K Fig. 2.8: Pressure drop in the heating water connection cable in relation to the volume flow with heat transfer medium heating water (pipe roughness 0.
Air-to-water heat pumps 2.3.2 2.3.4 Air intake or air outlet via light wells If the wall openings for the intake or outlet air ducts are below ground level, we recommend routing of the air circuit through streamlining plastic light wells. An air deflector must be installed if the wells are made of concrete. The light well on the air outlet side should be equipped with sound-absorbing cladding. Weather-resistant mineral fibre sheets with a volume weight of approx 70 kg/m³ or open-cell foam, e.g.
2.3.5 2.3.5 Air-to-water heat pumps Air duct hose kit for air-to-water heat pumps Flexible hoses are offered as accessories for the air circuit for the air-to-water heat pumps LI 11TES and LI 16TES. The air duct hose kit is suitable for use in rooms with low temperatures and low humidity. It contains a 5 m length of thermally-insulated and sound-insulated air hose which can be used for both the air intake and the air outlet side. Air intake and air outlet can take place via a light well or a rain guard.
Air-to-water heat pumps 2.3.7 A clearance of approx. 2 cm should be left between the heat pump and the duct to simplify future disassembly of the heat pump. The seal to the heat pump takes place with a sealing collar available as an accessory ( see Fig. 2.13 on page 25). Butt joint between two duct sections: The duct sections are equipped with a metal frame to facilitate connection.
2.3.7.1 Air-to-water heat pumps The air duct construction kit LKL ..A (see Fig. 2.14 on page 25) is made up of side walls made from glass fiber reinforced concrete incl. adhesive and two cover frames. It is not delivered pre-assembled and must be assembled on-site. This means that the air duct can be transported easily and shortened to the desired length on-site.
Air-to-water heat pumps 2.3.7.2 Built-under buffer tank Built-under buffer tanks on which heat pumps can be installed are available for various heat pumps with indoor installation. This increases the overall installation height of the heat pump, so that the air ducts can be installed directly below the ceiling. Unit type The dimensions for the installation of the heat pump and the position of the wall openings are determined as follows: 1.
Air-to-water heat pumps 2.3.7.3 2SHUDWLQJ VLGH 'LUHFWLRQ RI DLU IORZ Fig. 2.23: Installation in a corner LI 9, 12TU and LI 15TE (with air duct) Fig. 2.22: Installation in a corner LIKI 14TE (with air duct) ATTENTION! If air duct dimensions are included in the drawing, the size of the wall openings must be increased accordingly. Fig. 2.
Air-to-water heat pumps 2.4.1 5DLQ JXDUG :DOO RSHQLQJ $GDSWRU /LJKW ZHOO FXWWDEOH DFFHVVRU\ LQVXODWHG $LU GXFW FRQQHFWLRQV EHORZ JURXQG OHYHO 8VDJH RI D OLJKW ZHOO )LWWLQJ OHQJWK ,QFO ILWWLQJ SLHFH PP 'LUHFWLRQ RI DLU IORZ $GDSWRU FXWWDEOH 2SHUDWRU VLGH 6HDOLQJ FROODU DFFHVVRU\ 0LQLPXP GLVWDQFH XVLQJ $LU GXFW VKRUW / PP $GDSWRU Fig. 2.28: Wall installation LIKI 14TE Fig. 2.
2.4.2 Air-to-water heat pumps Condensate drain of the outdoor unit Condensate occurring in the outdoor unit during operation must be drained off frost-free. To this end, a drain elbow must be mounted on the base of the outdoor unit (see Fig. 2.30 on page 30). In warmer regions, the installation of a condensate tray heater in addition to this is also recommended. In colder regions that experience long periods of frost, the installation of condensate tray heating is absolutely essential.
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Air-to-water heat pumps 2.4.3 2.4.3 Hydraulic integration (;7(51$/ 67$7,& 35(6685( N3D Split heat pumps can be used either in mono energy mode or as a bivalent system for heating a building. In contrast to air-towater pumps for outdoor installation, the buffer tank for split heat pumps can also be integrated in the heating return, as these pumps already have pre-installed pipe heating for defrosting in the indoor unit. A minimum flow rate of 30 l/min is required to operate the heat pump safely.
3 Brine-to-water heat pump 3 Brine-to-water heat pump 3.1 Ground as a heat source Types of operation Temperature range of the ground surface at approx. 1 m depth +3...+17°C Temperature range in deep layers (approx. 15 m) +8...
Brine-to-water heat pump 3.1.2 3.1.3 Drying out buildings When a house is being built, large quantities of water are normally used for mortar, rendering, plaster and wall paper, which only evaporates very slowly from the building. In addition, rain can further increase the humidity in the building's structure. This increased humidity in the entire structure causes an increase in the heat consumption of the house during the first two heating periods.
3.1.4 Brine-to-water heat pump Relative pressure drop The pressure drop of brine is dependent on the temperature and the mixture. The pressure drop of the brine increases with sinking temperatures and increased concentrates of monoethylene glycol. 5HODWLYH SUHVVXUH GURS & & Antifreeze per 100m [l] Maximum brine flow rate [l/h] 32.7 8.2 1,100 53.1 13.3 1,800 40 x 3.7 83.5 20.9 2,900 50 x 4.6 130.7 32.7 4,700 Pipe DIN 8074 (PN 12.
Brine-to-water heat pump 3.2.1 3.2.3 Installation depth In cold regions, the ground temperature at a depth of 1 m can drop to freezing point even without heat being extracted. The minimum temperature at a depth of 2 m is approx. 5 °C. This temperature rises with increasing depth, although the heat flow from the Earth's surface decreases. Therefore, if the collectors are laid at too great a depth, it cannot be guaranteed that any ice will thaw in the spring. Thus, the installation depth should be approx.
3.2.4 5. Step: Brine-to-water heat pump The collector surface is calculated from the pipe length and the clearance NOTE The calculated minimum pipe length is, in practice, rounded up to a full 100 m circuit. Collector surface A = L (pipe length) * b (clearance) The required clearance at a location in southern Germany is 0.8m. 0.8m is selected Collector surface A = 600m * 0.8m = 480m² 3.2.
3.2.5 If the brine circuit manifolds are mounted inside a building, the manifolds and all pipes running through the house and through the wall of the house should be insulated with steam-resistant material to prevent the formation of condensation. %ULQH FROOHFWR Brine-to-water heat pump +HDW SXPS %ULQH FLUFXLW NOTE When installing brine circuits of equal length, hydraulic equalisation is not necessary. 3.2.
3.2.5 Brine-to-water heat pump The main breather with micro-bubble separator should be positioned at the highest and warmest point in the brine circuit. The equipment for the brine circuit can be installed either inside or outside the building. NOTE The brine circuit cable and fixtures must be fitted with diffusion-proof insulation. The function of the individual components must not be restricted.
Brine-to-water heat pump Standard dimensioning of ground heat collectors. NOTE The data in the dimensioning table Table 3.5 on page 42 are based on the following assumptions: The design of the brine circulating pumps is only valid for section lengths up to a maximum of 100 m and the given number of brine circuits! PE pipe (brine circuit): Pipe DIN 8074 32 x 2.9 mm – PE 100 (PN 12.
63 x 5.7 75 x 6.8 90 x 8.2 110 x 10 125 x 11.4 140 x 12.7 Motor protection l 50 x 4.6 Pressure expansion vessel m 40 x 3.7 Pipe length collector at 20 W / m 2 kW 32 x 2.
Brine-to-water heat pump 3.3 3.3.2 Borehole heat exchangers When implementing a borehole heat exchanger system, a heat exchanger system is constructed in boreholes, usually with a depth of between 20 m to 100 m in the ground. When double U pipes are used, there is an estimated average heat source output of approx. 50 W per metre of heat exchanger length.
3.3.3 Brine-to-water heat pump Fig. 3.13 on page 44 shows a cross section through a double U pipe of the type normally used for heat pumps. For this type of heat exchanger, a bore hole must first be drilled with a radius of r1. Four heat exchanger pipes and a back-fill pipe are inserted, and the borehole is then back-filled with a cement/ bentonite mixture. The heat exchanger fluid flows downwards in two of the pipes and flows upwards again in the other two.
Brine-to-water heat pump 3.5 3.5.1 Heat source water with intermediate heat exchanger 3.5.1 Use of water heat source in the event of contamination To enable indirect use of the heat source water, brine-to-water heat pumps can be operated via an intermediate circuit with additional stainless steel heat exchangers. To this end, an additional heat exchanger is installed in the heat source circuit of the heat pump and the intermediate circuit is filled with monoethylene glycol.
3.5.2 Brine-to-water heat pump 3.5.2 Expanding the operating temperature range If the heat source temperatures fluctuate, it is advisable to use a brine-to-water heat pump, as they permit minimum brine outlet temperatures of -9 °C. By comparison, water-to-water heat pumps switch off from a minimum water outlet temperature of 4 °C. The maximum brine inlet temperature for both brine-to-water and water-to-water heat pumps is 25 °C.
Brine-to-water heat pump 3.6 3.6 Heat source absorber systems (indirect use of air or solar energy) Brine temperature range -15...+ 50 °C Brine concentration Restrictions due to weather influences and limited surfaces possible. Due to the low outdoor temperatures, frost protection down to – 25 °C is necessary for roof absorbers, energy fences, etc. The brine concentration for this system is 40%.
4 Water-to-water heat pump 4 Water-to-water heat pump 4.
Cold water flow of HP Heat output of the heat pump Refrigerating capacity of the heat pump Pressure drop of the evaporator Well diameter from Motor protection Heat pump Circulating pump with bad water quality and use of an intermediate circuit with plate heat exchanger 1 Well pump compression 4.1 Well pump (recommended with standard) Water-to-water heat pump bar m3/h kW kW Pa Inch A 4 4" 4 m3/h kW kW Pa Inch A required1 2.4 2.2 8.4 6.8 6,200 4 0.52/1.4 1.
4.2 Water-to-water heat pump 4.2 Water quality requirements Irrespective of any legal regulations, the ground water should not contain any substances that could form deposits. iron (<0.20 mg/ l) and manganese (<0.10 mg/l) limit values must be adhered to to prevent iron ochre sedimentation from forming in the heat source system. a) Water-to-water heat pumps with welded stainless steel coil heat exchangers (Table 4.
Water-to-water heat pump 4.3 4.3.2 Tapping the heat source 4.3.1 Direct use of water of consistently good quality Water with temperatures between 8 °C and 25 °C can be directly used in water-to-water heat pumps if the compatibility of the ground or cooling or waste water has been proven according to Table 4.2 on page 50. 4.3.1.1 If the water quality is evaluated as being too poor, or if the water quality varies (i.e.
4.3.3 4.3.3 Water-to-water heat pump Heat exchanger for the protection of the heat pump The external heat exchanger must be suitable for the heat pump used as well as for the prevailing temperature level and water quality. In the simplest case, the heat exchanger consists of PE pipes which are installed directly in the cooling water, thus requiring no additional cooling water pump. This cost-efficient alternative can be used as long as the cooling water pool is large enough.
Water-to-water heat pump 4.3.3.1 Fig. 4.2: 4.3.3.1 Stainless steel plate heat exchangers WTE 20 to WTE 40 WTE 20 – WTE 37 Fig. 4.3: WTE 40 Device information, stainless steel plate heat exchanger Dimensions and weights Unit WTE 20 WTE 30 WTE 37 34 43 50 28 2.69 3.44 4.03 3.
4.3.3.2 Water-to-water heat pump 4.3.3.2 Fig. 4.4: Stainless steel plate heat exchangers WTE 50 to WTE 130 WTE 50 – WTE 100 Fig. 4.5: WTE 130 Device information, stainless steel plate heat exchanger Dimensions and weights Unit WTE 50 WTE 75 WTE 100 33 51 62 52 4.65 7.35 9.00 11.
Water-to-water heat pump 4.3.3.3 Fig. 4.6: 4.3.3.3 Titanium plate heat exchangers WTT 40 to WTT 100 WTT 40 – WTT 100 Device information, titanium plate heat exchanger Dimensions and weights Unit WTT 40 WTT 50 WTT 75 15 17 23 28 2.90 3.34 4.68 5.
5 Noise emissions from heat pumps 5 Noise emissions from heat pumps Every noise source - a heat pump, a car or an airplane - emits a certain amount of sound. Thus, the air surrounding the source of noise is turned into vibrations and the pressure spreads out in waves. On reaching human ears, this pressure wave creates vibrations in the eardrum, which triggers the hearing process. Sound field parameters are used to describe this so-called airborne sound.
Noise emissions from heat pumps 5.1.1 5.1.1 Emission and immission The total sound emitted from a sound source (sound event) is referred to as acoustic emission. Sound source emissions are generally denoted as sound power level. The effect of sound upon a specified location is referred to as acoustic immission. Acoustic immissions can be measured as the sound pressure level. Fig. 5.1 on page 57 graphically depicts the interrelationship between emissions and immissions.
5.1.2 Noise emissions from heat pumps 5.1.2 Sound propagation As already described, the sound power spreads out upon an increasing surface with increasing distance, so that the resulting sound pressure level decreases at an ever-increasing distance. Additionally, the sound pressure value depends upon a specified point of the sound propagation.
Noise emissions from heat pumps 5.2 5.2 Sound propagation of heat pumps Different measures for sound protection should be implemented when installing heat pumps depending on the installation location. Indoor installation Like any boiler, heat pumps should be connected with isolating fixings. The heat pump should be connected to the heating flow and return with pressure-resistant, temperature-resistant, nonageing, flexible hoses to prevent vibrations being transmitted.
5.2 Noise emissions from heat pumps Type LA 22PS / LA 26PS LA 26HS Dir. 1 2 3 Type LA 25TU 4 Direction 1 2 3 4 1m 56 50 58 50 1m 52 46 55 47 5m 45 39 47 39 5m 42 35 45 36 10m 39 33 41 33 10m 36 30 40 31 3 4 Table 5.11:Sound propagation LA 25TU Table 5.4: Sound propagation LA 22-26PS and LA 26HS Type LA 11TAS Dir.
Domestic hot water preparation with heat pumps 6.1.2 6 Domestic hot water preparation with heat pumps 6.1 Heating domestic hot water with the heat pumps for heating purposes The heat pump manager regulates both space heating as well as the preparation of domestic hot water (see chapter on regulation). The system for heating domestic hot water using the heat pump should be set up parallel to the system for space heating, because a different domestic hot water temperature is normally 6.1.
6.1.2 Domestic hot water preparation with heat pumps Cleaning and maintenance The mandatory cleaning intervals vary according to the water quality and the temperatures of the heating medium and the cylinder. We recommended having the tank cleaned and the system checked once a year. The glass-like surface prevents extensive build-up of lime scale and enables rapid cleaning using a powerful water jet. Large pieces of lime scale may only be broken up using a piece of wood before being rinsed away.
Domestic hot water preparation with heat pumps Safety valve A tested and non-closing safety valve should be installed where the cylinder is connected to the system. No constrictions, e.g. dirt traps, should be installed between the cylinder and the safety valve. Water should be able to flow (drip) out of the safety valve when the cylinder is being heated up to compensate for the expansion of the water and to prevent a severe build-up in pressure.
6.1.3 6.1.3 Domestic hot water preparation with heat pumps Attainable domestic hot water cylinder temperatures The maximum domestic hot water temperature which can be attained using a heat pump is dependent on: The heat output of the heat pump The heat exchanger surface area installed in the cylinder and The discharge rate (volume flow) of the circulating pump. NOTE The domestic hot water temperature (HP maximum) should be set approx. 10 K below the maximum flow temperature of the heat pump.
Domestic hot water preparation with heat pumps 6.1.4 . Air-to-water heat pumps (indoor installation) Volume in litres Heat exchange surface in m² Cylinder Charge pump M18 LIK 8TES / LI 9TES / LI 11TES / LI 20TE 300 3.2 WWSP 332 / PWS 332 UP 60 LI 9TU / LI 12TU 300 3.2 WWSP 332 UP 60 LIKI 14TE / LI 24TE 400 4.2 WWSP 880 UP 60 LI 16TES / LI 28TE 400 4.2 WWSP 880 UP 80 LI 15TE 400 4.2 WWSP 880 UP 80 UP 80 Heat pump LIH 26TE LI 40AS 500 5.7 WWSP 900 500 5.
6.1.5 Domestic hot water preparation with heat pumps Water-to-water heat pumps Heat pump Volume in litres Heat exchange surface in m² Cylinder Charge pump M18 UP 60 WI 10TU 300 3.2 WWSP 332 WI 14TU 300 3.2 WWSP 332 UP 60 WI 18TE 400 4.2 WWSP 880 UP 80 WI 22TE 500 5.7 WWSP 900 UP 70-32 WI 27TE 500 5.7 WWSP 900 UP 70-32 500 5.7 WWSP 900 800 8 WWSP 885S 2 x 500 11.4 2 x WWSP 900 7.
Domestic hot water preparation with heat pumps 6.2.1 Combination of multiple domestic hot water cylinders If water consumption is very high or if heat pumps with an output of more than approx. 28 kW are implemented for domestic hot water operation, the heat exchanger area required to ensure that adequate domestic hot water temperatures are maintained can be created by connecting the heat exchangers of several domestic hot water cylinders in parallel or in series.
6.2.2 Domestic hot water preparation with heat pumps 6.2.2 Integration Diagram 6.2.2.1 Integration for heating support /LQN FDEOH $ SUHVHQW 6.2.2.2 Integration for domestic hot water preparation /LQN FDEOH $ UHPRYHG 6.
Domestic hot water preparation with heat pumps Thermal disinfection Using the operator panel keypad, domestic hot water temperatures above 60 °C (up to 75 °C) can be programmed via the "thermal disinfection" menu. Above 60 °C, these temperatures are reached by the heating element. For higher temperatures to be reached, the adjusting screw (Chapt. 2.3 on page 22) on the temperature controller casing must be turned to the right-hand stop.
6.3.2 Domestic hot water preparation with heat pumps If the output of the photovoltaic plant is not sufficient, the domestic hot water heat pump is operated exclusively with power from the energy provider grid. Excess solar power is fed into the power grid via an inverter.
Domestic hot water preparation with heat pumps 6.3.3 6.3.4 Ventilation variants Variable switching of the intake air Dehumidifying in recirculating air operation A pipe duct system with integrated bypass flap allows the variable use of the heat extracted from outdoor or indoor air for domestic hot water preparation (lower operating limit: + 8 °C). Dehumidified air in laundry rooms can be used to dry laundry and prevents damage caused by dampness.
6.4 Domestic hot water preparation with heat pumps 6.4 Domestic ventilation units for domestic hot water preparation New types of materials and construction materials have made it possible to significantly reduce heating energy consumption. Optimum thermal insulation combined with a good seal on the outer shell of the building ensures that almost no heat is lost to the outside air.
Domestic hot water preparation with heat pumps 6.5.2 6.5.
7 Heat pump manager 7 Heat pump manager The heat pump manager is essential for the operation of air-towater, brine-to-water and water-to-water heat pumps. It regulates a bivalent, monovalent or mono energy heating system and monitors the safety components in the refrigeration circuit. The heat pump manager is either installed in the heat pump casing or is delivered with the heat pump as a wall-mounted controller. It carries out regulation of both the heating system and the heat source system.
Heat pump manager 7.1 7.1 Operation The heat pump manager is operated using 6 keys: ESC, MODUS, MENUE, , , ↵. Different functions are assigned to these buttons according to the current display (Standard or Menu). The operating status of the heat pump and the heating system is indicated in plain text on a 4 x 20 character LC display (see Fig. 7.1 on page 75).
7.2 Heat pump manager Button Standard display (see Fig. 7.
Heat pump manager Heat pump manager WPM 2007plus/ WPM EconPlus with removable control panel All temperature sensors to be connected to the heat pump manager with removable control panel must correspond to the sensor characteristic curve shown in Fig. 7.6 on page 77. The only exception is the outside temperature sensor included in the scope of supply of the heat pump (see Chapt. 7.2.3 on page 77) 5HVLVWDQFH YDOXH >N2KP@ 7.2.2 7.2.
7.3 Heat pump manager 7.3 Thermal energy meter WMZ NOTE The high-efficiency heat pumps come with an integrated thermal energy meter as standard. Measurement is carried out via pressure sensors in the heating circuit, which are directly linked to the heat pump manager WPM EconPlus.
Heat pump manager 7.5 NOTE Terminal diagram: Only use pure water in the heating circuit (no mixtures, no antifreeze)! The control PCB of the electronics module requires its own voltage supply, which can be tapped either from the mains power supply or from the terminal strip (mains L/N/PE ~230 VAC) of the heat pump manager. A signal line which transmits the pulse must be connected between terminals X2/1/2 of the electronics module and the heat pump manager (N1). 7.3.
7.5 Heat pump manager Heating/cooling circuit 2/3 Pre-configuration Operating mode Thermal energy meter Additional heat exchanger, domestic hot water Thermal energy meter / additional heat exchanger External 4-way valve Hydraulic design Active cooling function Passive cooling function Passive cooling function system design HC 2/3 control via HC 2/3 temperature sensor HC 2/3 heating curve end point (-20°C) HC 2/3 colder / warmer HC2/3 fixed setpoint Set temp.
Heat pump manager 7.5 M13 with passive cooling Mixer closed - heating circuit 3 M11 with passive cooling Mixer open renewable Date Year Day Month Day of week Mixer closed renewable Language Heating pump Heating pump - heating circuit 1/2 Operating data Mixer open - heating circuit 2 Outside temperature Mixer closed - heating circuit 2 Return set temp. Heating/cooling circuit 1 Auxiliary pump Return temp. Heating circuit 1 Cooling pump Flow temp.
7.6 Heat pump manager 7.6 7.6.1 Electrical connection heat pump manager Connection work WPM 2006 plus/WPM 2007 plus 1) The four-core supply cable for the output section of the heat pump is fed from the heat pump meter via the utility company's contactor (if required) into the heat pump (3L/ PE~400V,50Hz).
Heat pump manager 7.6.2 7.6.2 Electrical installation of the heat pump WPM EconPlus 1) The three- or four-core supply cable for the output section of the heat pump is fed from the heat pump meter via the utility company block (if required) into the heat pump (1L/N/ PE~230V,50Hz or 3L/PE~400V,50Hz). Safeguard according to the power consumption data on the type plate, with a multipole circuit breaker in the phases with C characteristic and common tripping for all paths.
7.6.3 7.6.3 Heat pump manager Connection diagram WPM 2006 plus / WPM 2007 plus ; ; ) - 7 7 $ 3( 1 / ; a 1 3( 9 $& +] : ; 1 5[ 7; 12 12 & $ 12 $ : .
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Heat pump manager 7.6.5 7.6.5 Connection diagram WPM EconSol Fig. 7.13: WPM EconSol Connection diagram www.dimplex.de 01.
7.6.6 7.6.6 Heat pump manager Legend for connection diagrams M19* M20* M21* M22* M23* Auxiliary circulating pump Domestic hot water circulating pump (cylinder charge pump) Swimming pool water circulating pump Heat circulating pump heating circuit 3 Mixer for bivalent or heating circuit 3 Mixer heating circuit 2 Solar pump N Control elements Low pressure switch brine Domestic hot water thermostat Swimming pool water thermostat N1 N10* N11* N14 N17.
Heat pump manager 7.6.7 7.6.
7.7 Heat pump manager 7.7 Connection of external system components to the heat pump manager Inputs Outputs Connection Explanation Connection X3-R1* X3 J2-B2 R2.
Heat pump manager 7.9 7.9.1 WPM Master for connecting multiple heat pumps in parallel 7.9.1 Description WPM Master The wall-mounted WPM Master is available for controlling up to 14 heat pumps in parallel. With this controller, up to 30 performance levels of a monovalent, mono energy or bivalent system can be controlled with outside-temperature dependant mode switching. Central and decentral control Central or decentral domestic hot water preparation can be used when controlling multiple heat pumps.
7.9.2 7.9.2 Heat pump manager Electrical connection WPM Master 1) The three-core supply cable for the heat pump manager (N1 heating controller) is fed into the heat pump (device with integrated controller) or to the future mounting location of the heat pump manager (WPM). The (L/N/PE~230 V, 50 Hz) supply cable for the heat pump manager must have a constant voltage.
Heat pump manager 7.9.3 7.9.3 Configuration of the network The network is a bus system which is connected via terminal J11 (both to the heat pump manager and the master controller). A maximum of 32 participants can be present in the network (16 controllers and 16 control panels). Fig. 7.15: Example of a possible network, including three heat pump managers with three control panels (pGD) Fig. 7.16: View of the connection on terminal J11 of the heat pump manager Fig. 7.
8 Integration of the heat pump in the heating system 8 Integration of the heat pump in the heating system 8.1 Hydraulic requirements During the hydraulic integration of a heat pump, it must be kept in mind that the heat pump only has to generate the actual required temperature level to increase efficiency. The objective is to feed the temperature level generated by the heat pump directly (unmixed) into the heating system.
Integration of the heat pump in the heating system 8.3 8.3.2 Safeguard the heating water flow rate The minimum heating water flow rate listed in the device information must be maintained for all operating states to guarantee the functional operation of the heat pump. The circulating pump should be dimensioned so that the water flow through the heat pump is also maintained even if there is a maximum pressure drop in the system (almost all heating circuits closed).
8.3.3 Integration of the heat pump in the heating system Brine-to-water heat pump Heat source temperature of to Water-to-water heat pump Max. temperature spread between heating flow and return Heat source temperature of to Max. temperature spread between heating flow and return -5° C 0 °C 10K 7° C 12 °C 1 °C 5 °C 11K 13 °C 18 °C 11K 6 °C 9 °C 12K 19 °C 25 °C 12K 10 °C 14 °C 13K 15 °C 20 °C 14K 21 °C 25 °C 15K 10K Table 8.
Integration of the heat pump in the heating system 8.3.5 8.4 Dual differential pressureless manifold In a heat pump, the dual differential pressureless manifold is a useful alternative to the buffer tank connected in parallel, since it fulfills the same function without compromising when it comes to efficiency. The hydraulic isolation is realised using two manifolds without differential pressure with a check valve each (see Fig. 8.41 on page 120).
8.4 Integration of the heat pump in the heating system Unmixed heating circuit Mixed heating circuit The following diagrams show the pressure drop for the individual components: Volume flow pressure drop diagram Heat pump connection assembly 1“ MMB 25 0,30 Pressure drop [bar] 0,25 0,20 0,15 0,10 0,05 Domestic hot water preparation 0,00 0 Fig. 8.
Integration of the heat pump in the heating system 8.4.1 8.4.1 Compact manifold KPV 25 The compact manifold functions like an interface between the heat pump, the heating distribution system, the buffer tank and, in some cases, even the domestic hot water cylinder. Immersion heater Buffer tank A compact system is used to simplify the installation process, so that a lot of different components do not have to be installed individually.
8.4.2 Integration of the heat pump in the heating system 8.4.2 Compact manifold KPV 25 with extension module EB KPV The compact manifold KPV 25 can be turned into a differential pressureless manifold through the use of the extension module EB KPV. The generator and consumer circuits are hydraulically isolated and they each contain a circulating pump. 8.4.3 NOTE The use of the compact manifold KPV 25 with extension module EB KPV is recommended for heat pumps with a heating water flow rate up to max. 2.
Integration of the heat pump in the heating system 8.4.3.2 /RDG FLUFXLW YLD WKH KHDW SXPS IRU WKH GHVLJQ RI WKH PDLQ FLUFXLW KHDW FLUFXODWLQJ SXPS 3UHVVXUH GURS >EDU@ 'LVFKDUJH FLUFXLW IRU WKH GHVLJQ RI WKH KHDW FLUFXODWLQJ SXPS LQ WKH GLVWULEXWLRQ V\VWHP -RLQW RSHUDWLRQ RI WKH PDLQ FLUFXLW KHDW FLUFXODWLQJ SXPSV DQG GLVWULEXWLRQ V\VWHP 9ROXPH IORZ >O K@ Fig. 8.
8.5 Integration of the heat pump in the heating system Volume flow pressure drop diagram Pump assembly FL-MK DN 50 Art.-Nr.: 66548 EA KKW +HDWLQJ FLUFXLW 0,80 Pressure drop [bar] 0,70 +HDW FLUFXODWLQJ SXPS 0,60 0,50 %XIIHU WDQN 0,40 0,30 ''9 0,20 0,10 0,00 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Volume flow [m3/h] 'RPHVWLF KRW ZDWHU F\OLQGHUV $X[LOLDU\ FLUFXODWLQJ SXPS +HDW SXPS Fig. 8.
Integration of the heat pump in the heating system 8.6 Electrical components : 1 2 Switch box complete with heating contactor and connection terminals 3 Heat pump manager (HWK 332Econ and HWK 332 Econ-E hydro towers only) 4 6 2nd heat generator, electrical pipe heater, heat output 2 / 4 / 6 kW, secured via safety temperature limiter 7 13 Unmixed heating circuit incl.
8.6.1 Integration of the heat pump in the heating system When implementing brine-to-water or water-to-water heat pumps, the buffer tank can be installed in the flow or, in a purely monovalent mode of operation, even in the return flow. NOTE Buffer tanks connected in series are operated on the temperature level required by the heating system. They are not used for bridging shut-off times (see Chapt. 8.6.3 on page 104).
Integration of the heat pump in the heating system Dimensions and weights Nominal capacity 8.6.
8.6.3 Integration of the heat pump in the heating system )URQW SDQHO 7\SH SODWH 3OXJV ò³ &DEOH IHHGWKURXJK '+: RII &DEOH GXFW &DEOH IHHG WKURXJKV LQ %$0 3LSH F\OLQGHUV 3LSH H[WHQVLRQ LQ WKH DFFHVVRULHV SDFN &DS SUH LQVWDOOHG '+: RQ 3OXJV ò³ :( FDUWULGJHV RSW Fig. 8.20: Dimensions of the PSP 100E built-under buffer tank for the compact brine-to-water heat pump (see also Table 8.6 on page 105) &URVV PHPEHUV ULYHWHG 'RPHVWLF KRW ZDWHU Fig. 8.
Integration of the heat pump in the heating system &\OLQGHU FRYHU 8.6.
8.7 8.7 Integration of the heat pump in the heating system Flow temperature limit of underfloor heating Many underfloor heating pipes and screed floorings should not be heated over 55 °C. In the case of bivalent operation or if the buffer tank is charged externally, a limitation of the flow temperature must be effected to prevent such overheating. 8.7.
Integration of the heat pump in the heating system 8.9 8.9 Scale formation in domestic hot water heating systems Scale formation in domestic hot water heating systems cannot be avoided, but in systems with flow temperatures below 65 °C, the problem can be disregarded. With medium or high-temperature heat pumps and in particular with bivalent systems in the higher output range (heat pump + boiler combination), flow temperatures of 60 °C and more can be achieved.
8.10 Integration of the heat pump in the heating system 8.10 Contaminants in the heating system When installing a heat pump in a new or existing heating system, the system should be flushed to remove deposits and suspended matter. These types of contaminants can reduce the heat transfer of the radiators, impede the flow or collect in the condenser of the heat pump. In extreme cases, they can cause the heat pump to switch off automatically.
Integration of the heat pump in the heating system 8.12 8.11.3 Renewable heat generators The heat pump manager has a separate operating mode for the integration of renewable heat generators such as solid fuel boilers or thermal solar energy systems. The “bivalent-renewable” operating mode can be chosen during the preconfiguration.
8.13 Integration of the heat pump in the heating system 8.13 Constantly regulated tank charging Two buffer tank thermostats and one contactor (2 contacts) are necessary for regulation of buffer tanks with large volumes which are to be charged with a constant temperature. / 1 1 ,' 635 NOTE % 7! The illustrated circuit ensures full charging of the buffer tank, and in this way, prevents the heat pump from surging. %XIIHU WDQN $ $ % 7! Fig. 8.
Integration of the heat pump in the heating system 8.15 8.15 Hydraulic integration The heating system control is identical for air-to-water, brine-towater and water-to-water heat pumps; however, the hydraulics for the integration of the heat source are different. The integration diagrams shown on the following pages show standard solutions for the most common applications. The heat pump manager controls the individual components. The dia- Legend 1. 1.1 1.2 1.3 1.7 2 3. 3.1 4. 5. 13. 14. E9 E10 E10.1 E10.
8.15.1 Integration of the heat pump in the heating system 8.15.1 Integration of the heat source The heat source primary pump M11 transports the recovered environmental heat to the evaporator of the heat pump. In air-towater heat pumps, this task is carried out by the integrated fan. The integration of the ground or ground water as a heat source can be seen in the following figures.
Integration of the heat pump in the heating system 8.15.2 8.15.
8.15.
Integration of the heat pump in the heating system 8.15.3 8.15.3 Heat pumps in compact design 7& Compact air-to-water heat pumps 1 % 5 Pre-configuration Setting Operating mode electric heating Immersion heater in the buffer 1st heating circuit Heating 2nd heating circuit No Domestic hot water Yes with a sensor 7 Flange heater Yes Swimming pool No The system components for the heat source and an unmixed heating circuit are integrated in a heat pump in compact design.
8.15.4 Integration of the heat pump in the heating system 8.15.
Integration of the heat pump in the heating system 8.15.5 8.15.
8.15.5 Integration of the heat pump in the heating system M13 (X2-M13) WWM TC Heating circuits with differential pressureless manifold R1 (X3-R1) T R2.1 (X3-R2.
Integration of the heat pump in the heating system 8.15.
8.15.6 Integration of the heat pump in the heating system 8.15.6 Combination cylinders and combi-cylinders TC Central domestic hot water preparation via tube heat exchangers T Immersion heater in the buffer 1st heating circuit Heating 2nd heating circuit No Domestic hot water Yes with a sensor Flange heater Yes Swimming pool No Domestic hot water is prepared using an integrated tube heat exchanger with 3.2 m2 heat exchanger area.
Integration of the heat pump in the heating system 8.15.7 8.15.7 Bivalent heat pump heating system Pre-configuration Setting Operating mode Bivalent Heat pump+ boiler 1st heating circuit Heating 2nd heating circuit No Domestic hot water No Swimming pool No M13 (X2-M13) WWM TC Boiler for supplementary heating R1 (X3-R1) T KPV M13 (X2-M13) EB KPV Regulation of the mixer (M21) is undertaken by the heat pump manager.
8.15.
Integration of the heat pump in the heating system 8.15.8 8.15.8 Integration of renewable heat sources Solar back-up for domestic hot water preparation R23 (X3-R23) Function: The solar controller WPM Econ SOL adds solar control to the existing WPM Econ Plus heat pump manager. The solar controller WPM Econ SOL controls the circulating pump M23 in the solar station. If there is a sufficiently high temperature difference on sensor R23 and M23 (X2-M23) SOLPU E1 0.
8.15.8 Integration of the heat pump in the heating system Renewable back-up for heating and domestic hot water preparation Pre-configuration Operating mode TC R23 (X3-R23) electric heating WWM E1 0. 5 T (F7) Solar control M23 (X2-M23) SOLPU M13 (X2-M13) W Setting bivalent renewable immersion heater in the buffer Yes R1 (X3-R1) 1st heating circuit T 2nd heating circuit No Domestic hot water Yes with a sensor R2.1 (X3-2.
Integration of the heat pump in the heating system 8.15.9 Renewable back-up via a combo tank Operating mode electric heating Immersion heater in the buffer 1st heating circuit Heating TC R23 (X3-R23) Setting M23 (X2-M23) M13 (X2-M13) SOLPU WWM E1 0. 5 T Pre-configuration N1-B1 (R1) T R2.1 (X3-2.1) X 16 3.1 T N17.4 DDV M16 (X2-M16) T M18 (X2-M18) R3 (X3-R3) N1 E9 1 3 E10.1 T R13 (X3-R13) T R22 (X3-R22) (X2-K21) (X2-K20) M21 M (N1-N07/N08) 00431094 Fig. 8.
8.15.10 Integration of the heat pump in the heating system 8.15.10 parallel connection of heat pumps Pre-configuration Dual differential pressureless manifold 0 1 1 7& Heat pump 1 1 7 0 0 1 1 % 5 7 1 % 5 1 % 5 1 % 5 0 1 1 7 1 % 7 1 1 7 1 % 5 7 Setting 1.1 1.
Integration of the heat pump in the heating system 8.15.11 8.15.11 Integration of split air-to-water heat pumps Mono energy operation TC With all split air-to-water heat pumps, the indoor unit contains an electric heating element for supplementary heating and a circulating pump. The heating element supports the heat pump when needed. Via the three-way valve, the circulating pump either acts as a heat circulating pump or a domestic hot water circulating pump. (E10.
9 Online Operating Cost Calculator 9 Online Operating Cost Calculator The operating cost calculator is an effective online tool for designing a heat pump heating system and for determining the operating costs and the seasonal performance factor according to VDI 4650. The online tool is divided into 9 steps. Steps 1-5 comprise the design process of the heat pump heating system. Step 6 is the calculation of the seasonal performance factor and the creation of the calculation sheet.
Help with planning and installation 10.1 10 Help with planning and installation 10.1 Pipework dimensioner In order to minimise the pressure drops and thus the power consumption of the circulating pumps, the pipe cross sections must be dimensioned accordingly. The specific pressure drop per pipe meter and the flow velocity of the medium in the pipe – both based on the nominal volume flow – are used as designing criteria. dpmax = 120 Pa/m from pipework DN 10 to DN 65 wmax = 0.
10.2 Help with planning and installation 10.
Help with planning and installation www.dimplex.de 10.2 01.
Subject to colour deviations and technical modifications without notice · AU 05/13.3 · AKOM360 Munich · DIM 038/13 · Order no. 717v4 Visit www.dimplex.de and www.heating-with-heatpump.com for further up-to-date information Glen Dimplex Deutschland GmbH Dimplex Division Am Goldenen Feld 18 95326 Kulmbach, Germany Phone: +49 9221 709-201 Fax: +49 9221 709-233 09221709233@dimplex.de www.dimplex.
