Planning information

Key data to be observed!

Installation
The HV unit must be installed upright in a dry and frost-free room, preferably within the thermal envelope. The system is not to be installed directly under or next to living and sleeping areas. To the side of and above the HV unit, sufficient space for the laying of the power supply cords must be allowed for - as a rule, 80 cm are sufficient per side. However, the space required depends on the local conditions and is to be defined on a case-by-case basis. For service and inspection work an area of at least 80 cm in front of, at least 50 cm to the side of and at least 40 cm behind the devices (if possible) is to be considered. The front cover and the rear wall must be freely accessible and removable.

Right and left versions
The operating display is connected to the unit via a cable and can thus be attached to each side of the unit. Thus right-hand or left-hand installation is possible at all times.
Right-hand installation = outside air from the right; left-hand installation = outside air from the left

The standard installation is right-hand installation and should be preferred. In the case of right-hand installation, the filter and air heat exchanger can be dismantled without difficulty and without the need to dismantle other components. In the case of left-hand installation, in order to replace the filter and dismantle the air heat exchanger metal sheets must be dismantled.

Air connection at the device
All ventilation tubes at the device must be connected flexibly in order to prevent vibrations and the transmission of sound from the device to the duct system. The ventilation tubes may only be inserted so far that the ventilation tube extends max. 3 mm beyond the insulation of the side walls of the devices.
At the device connection we recommend a plug connector with an approx. 30 cm flexible tube. The plug connector can be directly fitted with a flexible tube, spiral tube or a female coupling. Into the female coupling a shaped piece (e.g. arch) can then be inserted.

Air conveyance outside and outgoing air
The ducts for the geothermal heat exchanger, outside and outgoing air are to be kept as short as possible in the building for energy reasons and must be sufficiently heat-insulated. The external pressure loss from the point where the outside air is aspirated to the exhaust point must not exceed the max. external pressure loss specified under “Technical data”. The suction and exhaust points are to be positioned (separated by a distance of at least 3 m) so that no “air short circuit” can occur. The electric cables are to be laid with a sufficient gap between them and the particular condensation drain.

Air conveyance outside air ventilation
The outside air for the building ventilation must always be connected via a separate outside air connection and must not be from diverted the outside-air heat pump. The electric cables are to be laid with a sufficient gap between them and the particular condensation drain.

Measuring plate supply/exhaust air
For easier adjustment of the total flow rates it is recommended that a measuring plate (e.g. damper with flow meter) be fitted at the supply air and exhaust air lines, directly at the system connection

Pressure gauge for volume flow or pressure-constant ventilation.
For volume flow or pressure-constant ventilation a pressure gauge can be optionally fitted (see under “Accessories”). Fitting position silicon tube at least 2 m after the device in a straight tube section measuring at least 1 m .

Constant volume flow controller
In the case of apartment buildings in combination with a pressure gauge for volume flow-constant ventilation:
To enable each apartment in an apartment building to control the ventilation separately, electronic constant volumetric flow controllers with a three-step switch, e.g. Trox VARYCONTROL VAV controller of the TVR-Easy series, should be fitted in each apartment. Per apartment 2 constant volumetric flow controllers (1x for supply air + 1x for exhaust air) as well as 1x 3-step switch are required.

Condensate connections
Condensate connections are to be attached at the lowest point on the following ventilation tubes:
Outside air ventilation & outside-air heat pump
Outgoing air & geothermal heat exchanger
In addition, there is a condensate drain hose on the side of the device that is to be routed into the drainage system with a sufficient gradient.

Remote control (room temperature)
The TF-RT is located in the remote control. The unit must be installed at a position where the room temperature is constant and representative for the building. Heat and cold-generating devices that can influence room temperature must not be situated near the external operating unit.
The remote control unit is fitted directly on the wall. Supply line 3x0.75mm²

Booster switch
A 1-gang push switch is fitted as a booster switch by the building contractor (the 1-gang push switch is not included in the scope of delivery). A maximum number of 10 1-gang push switches can be connected in parallel to the controller. Supply line per switch 3x0.75mm². If more than 2 1-gang push switches are connected the lines must be brought together on a terminal block by the building contractor and then only 1 line is connected to the controller.
Attention! 1-gang switchers may not be used. The switch used must automatically jump back into original position after it has been operated. Recommended switches e.g.:
- JUNG 1-gang push switch 10 AX 250 V ~, Universal Off Switch # 506 TU
- JUNG LED lamp for 1-gang push switch and push button DC operation, polarity-independent
(red 12 - 48 V, approx. 4 mA, # 961248 LED RD ; green 12 - 48 V, approx. 4 mA, # 961248 LED GN)
- Cover with light guide for switch elements in the whole building.

Operating display
The display housing is attached to the outer housing by means of a rear-side magnetic strip and connected to the installation with the supplied display cable (length 5 m with D-Sub plug).
Wall mounting (e.g. in the living room) is also possible. A wall bracket and a 15 m or 30 m connecting cable, which are to be ordered separately, are required as well as an in-wall socket fitted by the building contractor.
The plug attached to the connecting cable is to be fixed to the wall bracket. The other cable end is to be laid in a separate empty tube, without load lines, and connected in the supplied terminal box - a cable extension is not permitted. The display cable is then connected at the terminal box. The wall bracket is attached to the wall, the socket in the display transferred to the rear side of the housing and the display attached to the wall bracket. For maintenance work you can then simply remove the operating display and connect it directly to the display cable of the installation.

Supply-air hot-water duct heater
If the supply air is heated via a hot-water duct heater, a zone valve must be fitted as a temperature limiter after the circulating pump in the supply line.

Frost-protection heating instead of geothermal heat exchanger
If no geothermal heat exchanger is installed for fresh-air heating, a defroster heater must be installed in order to preheat the fresh air to at least 0° C in winter. This prevents the reverse flow duct heat exchanger from icing up and defrosting is not necessary.
The defroster heater is controlled externally and not via the installation.

Geothermal heat exchanger
The geothermal heat exchanger has the task in winter of preheating the fresh air to at least 0°C. This prevents the reverse flow duct heat exchanger from icing up and defrosting is not necessary. Another pleasant advantage is that the fresh air in summer is cooled by the geothermal heat exchanger and the building is ecologically temperature-controlled. It must be laid frost-proof at a depth of 1.5 - 2 m under the terrain surface The distance to parts of the building must be at least 1 m in order to avoid frost damage to the parts of the building. The geothermal heat exchanger is to be laid with a gradient of at least 1% in order drain off condensate. At the low point a condensation water drain is to be provided. The possibility of flushing for cleaning is to be provided for. For the geothermal heat exchanger PE tubes should be used. PVC tubes are not recommended owing to the discharge of ions. For ideal heat transfer the tubes should be corrugated on the outside and smooth on the inside for low pressure-loss. Cable protection ducts of different manufacturers meet these criteria. For reasons of hygiene a filter of class 3 or a higher quality must be fitted at the suction point of the geothermal heat exchanger.
The design of a geothermal heat exchanger depends on many factors. Therefore general specifications for tube lengths, tube dimensions and the laying procedure cannot be provided. The design is to be calculated exactly by the specialist planners on a case-by-case basis. Alternatively a brine geothermal heat exchanger can also be installed.
If a geothermal heat exchanger cannot be installed for reasons of space, an electrical defroster heater is to be installed as an alternative. The defroster heater then takes over the task of preheating the fresh air to at least 0°C on cold days.

Geothermal heat exchanger bypass flap ventilation (flap on-site)
If an air geothermal heat exchanger with air ducts in the ground (not a brine GHE) is used together with a geothermal heat exchanger flap the outside air ventilation must be connected via a separate outside air connection and must not be diverted from the outside air heating pump

Fireplaces (tiled stoves, fire places etc.)
If fireplaces are planned or present in the building (tiled stoves, fire places etc.) special safety measures are required for them. Discuss this with the specialist planner and the responsible chimney sweeper. If the special safety measures are not observed, there is a danger of suffocation!

Kitchen fume extraction hood
Fume extraction hoods must not be connected to the ventilation duct system. For grease filtering, fume extraction in air circulation mode is recommended. The odours resulting from cooking are removed by the ventilation system. Positioning of the exhaust-air valve in the immediate vicinity of the circulation-air fume extraction hood ensures efficient removal of odours. An exhaust-air valve with an incorporated grease filter is to be recommended - with which safety from grease contamination of the ventilation duct system is further improved.

Storage tank
Faultless functioning of the HV unit is only ensured in combination with the Effiziento storage tanks. The combination of the HV unit with other storage tanks is not recommended.

Flow/return heat pump to the storage tank
The first 20 cm directly next to the device are to be connected flexibly in order to prevent vibrations and sound transmission from the device to the duct system.
Provide a flow meter (operating with the float measuring principle) in the feed line so that the rate of water flow through the condenser of the heat pump can be measured at all times. Refer to the technical datasheets of the devices to obtain the required flow rate.

General information for water-side connections
In the case of open heating systems (the HV unit with the pressureless heat storage EF 580/1/2 is an open heating system) or if plastic tubes that are permeable to diffusion are used with steel components (steel pipes, steel radiators etc.), corrosion can occur at the steel parts through oxygen diffusion. The corrosion products, such as rust sludge, can be deposited, for example, in the condenser of the heat pump and cause heat-pump performance losses through constriction of the cross-section, or shut-down of the heat pump by the high pressure switch. There is also the danger that the condenser will become permeable owing to corrosion. For this reason, steel components that are directly associated with the HV unit or heat pump must not be used.

Circulating pumps for storage tank charging
In the case of open storage tank systems (e.g. EF 580/1/2) a pump with a gunmetal housing must be used in order to avoid corrosion and damage to the HV unit/heat pump. The pump must be dimensioned according to the delivery rate (see “Technical data”) .

Water hardness & and tapping rate
In the case of heat storage tanks in which the domestic hot water is heated via a heat exchanger based on the continuous flow principle (e.g. EF 580/1/2, KS-PW, KS-PWS), it is advisable, in the case of high water hardness (> 10° dH), to fit a filter in the domestic hot water line, or to install a softening plant. Otherwise there is a risk that the deposited lime scale will clog the aerators at the tap connections.
In rare cases, tapping rates > 36 l/min can lead to noises in the drinking water heat exchanger.

Circulating pumps for heating circuit
The control system of the installation regulates the speed of the circulating pump for the heating circuit and solar circuit. If an electronically controlled circulating pump is used, the speed control system of the installation must be deactivated.

Zone valves in in the heating circuit and solar circuit in the supply and return lines
Provide a zone valve in each case in the supply line between the circulating pump and the sensor for the heating circuit as well as in the return line in order to guard against possible discharging of the heat storage tank through gravity circulation. (Do not connect zone valves directly to pump outputs - for this purpose separate outputs are available in the controller). Zone valve: Connected when currentless, 230V, 50Hz, max. 59 Watt

Designing of ventilation and heating systems
Designing of ventilation and heating systems must be performed by the specialist planner in accordance with the applicable standards and also following the guidelines of the Passive House Institute in the case of passive houses
In order to enable the highest possible coefficient of performance of the heat pump it is recommended to dimension the heating circuit for a temperature of max. 45° C.
If different temperatures for the heating circuit and duct heater or a second heating circuit with another temperature (e.g. for underfloor heating) are necessary, the second and lower heating circuit temperature must be achieved via a mixer or a constant heat regulation group.
Please also note that the speed of the recirculating pumps is controlled. If electrical zone valves are connected directly in parallel to the pump outputs, the zone valves in the speed control range are constantly opened and closed. Therefore it is not possible to connect zone valves in parallel to pump outputs. For the connection of zone valves special outputs in the controller are available to you. Since further designing must be exactly adapted to the individual case, more detailed information will not be provided at this point.

Initial start-up and drying of buildings
The HV unit must not be put into operation during the building phase in order to prevent contamination of the installation and the duct system through builder’s dust. The HV unit is not designed to dry buildings and must not be used for this purpose.



Dimension air connection tubes
For connection to the devices we recommend the following ventilation tubes for the outside-air heat pump and outgoing-air heat pump: (OS= outside-air heat pump, OG= outgoing-air heat pump);

For the building ventilation outside air ventilation, supply air and exhaust air there is no recommendation since the pressure loss must be calculated case-by-case.

ATTENTION: The external pressure loss from the point where the outside air is aspirated to the exhaust point must not exceed the max. external pressure loss specified under “Technical data”. The suction and exhaust points are to be positioned (separated by a distance of at least 3 m) so that no “air short circuit” can occur.
The pressure loss and the sound insulation must be calculated for each installation. If necessary additional sound insulation measures must be taken.
All ventilation tubes at the device must be connected flexibly.

Sound insulation tube:
The “FSKWS50-…” is a flexible aluminium tube with acoustic and thermal insulation wool and a plastic coating intended specially for use with heat pumps. Good sound insulation with low pressure-loss. Arches can be formed with the tubing. The pressure loss and the sound insulation must be calculated for each installation.

Spiral tubing:
Spiral tubing can also be used and is only recommended if connection to the sound insulation tube cannot be created for reasons of distance. There is no sound insulation in the case of spiral tubing. The pressure loss and the sound insulation must be calculated for each installation.

1) At the device connection we recommend a plug connector with approx. 30 cm flexible tubing. The plug connector can be directly fitted with a flexible tube, spiral tube or a female coupling. Into the female coupling a shaped piece (e.g. arch) can then be inserted.


Sound - solid-borne sound transmission
The system is not to be installed directly under or next to living and sleeping areas. In order to prevent the transmission of vibrations and sound via the ground, the installation surface of the devices must be separated and acoustically decoupled from the screed. If the system is to be installed on a ceiling (concrete ceiling, wooden beam ceiling etc.) suitable sound decoupling is to be ensured. In addition, the system must be underlaid with suitable solid-borne sound insulating strips made of rubber granulate LxBxH 200x50x15 (must be ordered separately). In the case of HTZ 4+8 4 Pcs., and in the case of HTZ 11+15+20, 6 Pcs. of solid-borne sound insulating strips are to be provided.
Please use exclusively the sound insulating strips recommended by us. Other sound insulating strips as well as the laying of strips over the entire surface are unsuitable for sound insulation.

Sound - airborne sound transmission
The number and size of the silencers for the air flows must be planned by a specialist engineer.

In the case of unfavourable sound insulation boundary conditions such as, e.g. sound pressure <50 dB LpA at a distance of 5m (open air test site) from the outside-air and outgoing-air outlet of the heat pump/ventilation system, additional sound insulation measures, such as, e.g. the following baffle silencers, are required for the sound insulation tube “FSKWS50-…” .

Technical data

Insertion loss:

The baffle silencers are to be installed by the building contractor, with the power supply disconnected, by means of suitable supports/suspensions on both sides. Additional loads area to be absorbed separately. The technical specifications apply only if the inflow is even.