...

Availability of the heat source outside air

• Unrestricted

...

Fig. 2.1.2 Condensate drain in the sewer (shown with siphon)

...

Fig. 2.1.3 Free condensate drainage on an elevation (e.g. building roof)

...

In addition, the tightness of the heat pump and the functionality of the refrigerant circuit must be checked at regular intervals.

...

Fig. 2.1.5: Sketch of the concrete foundation	Fig. 2.1.6: Sketch of the foundation with pavement slabs

...

For mounting heights over 1 m, additional safety measures against falling are required depending on the local conditions (e.g. wind loads). Access for maintenance work must be possible at all times.
Make sure that no electrical, gas or water lines are laid at the assembly site. Do not mount the wall bracket near windows and doors, as the air blown out of the side of the heat source module is significantly colder than the ambient air.

...

Air short circuit
With air / water heat pumps, a free, unhindered air flow must be ensured over the heat pump's evaporator. Air short circuits between the air flow evaporator inlet (intake) and the air flow evaporator outlet (outlet) must be prevented. This is particularly important when installing several heat pumps set up parallel to one another. The heat pump must be set up in such a way that the air cooled by heat extraction is blown out freely. In the case of installation close to the wall, the discharge must not be in the direction of the wall.
Installation in hollows or inner courtyards is not permitted, as the cooled air collects on the floor and is drawn in again by the heat pump during longer periods of operation.
The air blown out by the heat pump is below the current air temperature. Therefore, there should be no water-carrying pipes such as gutters in the direction of discharge.

...

Tab.2.1: Overview of electrical connection cables (* available in special lengths on request)

...

The connection to the heating in the house is to be made with two thermally insulated pipes according to ENEV. Pre-assembled heating water connection lines are recommended, consisting of two flexible pipes for flow and return in a jacket pipe with integrated thermal insulation made of PE foam, including a pre-assembled 90 ° bend for quick and easy connection to the heat pump. The jacket pipe is laid frost-free in the ground and passed through a wall opening into the boiler room or the technical room at ground level. Costly damage to the pipelines can be avoided in advance if there are no deep-rooted plants in the area of the connecting lines.

...

Copper pipelines:
The use of copper pipes with a cross-section of ≥ 35 mm is recommended. The use of a smaller cross-section (e.g. CU-28 mm) results in high pressure losses (example: the pressure loss when laying 2 m of copper pipe with a cross-section of 28 mm corresponds to 8 m of laid copper pipe with a cross-section of 35 mm).

The heat pump connections are routed downwards or to the side of the device. The location of the heating lines and the condensate drain can be found in the respective foundation plans in the dimension drawings (see installation and operating instructions).

...

• direct implementation in the dry area

• Sealing sleeve against non-pressing water (DIN 18337)

• Wall sealing flange against pressing water (DIN 18336)

...

Fig. 2.2: Hydraulic and electrical connections when buried in the ground

...

• Sufficiently dimension air ducts, take into account the available pressure of the fan.

• Provide wall openings, avoid short-circuit currents from the exhaust air to the supply air.

• Place the intake and exhaust openings on different sides of the building, if possible, leave a distance of at least 2 m if they are on the same side of the building.

• Condensate drainage

• Sound propagation

If the heat pump is installed on an upper floor, the load-bearing capacity of the ceiling must be checked. When installing on a wooden ceiling, the structure-borne sound decoupling and the statics must be considered separately.

...

ventilation
The room where the heat pump is installed should, if possible, be ventilated with outside air so that the relative humidity remains low and the formation of condensation is avoided. Particularly during building drying and commissioning, condensation can form on cold parts.

...

2.3.3 Air duct hose set for air / water heat pumps

F R E I: Air hose set LUS 2 or LUS 4
Fig.2.11 Free

Fig.2.12 Free

2.3.4 Project planning for air ducts

...

Tab.2.5: Reference values for the air duct system accessories

...

The suction and discharge can be done either via a light shaft or wall opening with rain protection grille.

...

• The minimum cross-sections of the shafts must at least correspond to the dimensions of the air ducts used

• Sealing of the transition between light shaft and wall opening (see Insulating the wall breakthroughs )

• Cover with grating (burglar protection)

• Provide a drain for condensate

• To protect against small animals and leaves, a wire mesh (mesh size> 0.8 cm) should also be attached.

• Provide protection against snow build-up

...

The necessary wall openings are to be created on site. It is imperative that they are clad with thermal insulation on the inside to prevent the masonry from cooling down or condensation. In the example for the execution of a wall opening, for example, insulation using diffusion-proof rigid foam (insulation thickness 25 mm - e.g. PU rigid foam) is shown. The transition between wall insulation and air duct (outside wall side) must be connected airtight. In unfavorable weather conditions (e.g. in driving rain), penetrating water must be drained away on a slope.

...

Tab. 2.6: Legend for installation variants for air ducts

...

• LI 9TU, LI 12TU and LI 16I-TUR

• LIK 8TH

• LIK 12TU

...

Fig. 2.17: Wall installation with air duct on the intake and exhaust side - top view

...

Fig. 2.18: Installation with storage tank below - side view

...

2.3.5.3 Installation examples for wall and corner installation

...

• Laying electrical connection and load lines

• Laying of refrigerant lines between the indoor and outdoor units

• Wall openings for connection lines

• Observe the minimum clearances for assembly

• If necessary, observe state building regulations

...

• Note the weight of the external unit.

• Recommended maximum height of the wall bracket above the floor 1 m. For mounting heights over 1 m, additional safety measures against falling are required depending on the local conditions (e.g. wind loads).

• Access for maintenance work must be possible at all times.

• Use suitable mounting material depending on the nature of the wall to attach the wall bracket.

• If necessary, use rubber buffers as silencers.

...

The condensate water that accumulates in the outdoor unit during operation must be drained away frost-proof (infiltration capacity of at least 1.5 liters per kW heating output of the heat pump). The condensate pan of the external unit offers various options for this. It is possible to let the condensate drip flat onto the floor in an uncontrolled manner. The floor under the heat pump should be designed with coarse and fine gravel so that the condensate can drain away quickly (see Figure 2.65). If there is insufficient infiltration capacity, increased ice formation can occur during periods of frost. This does not apply to the ground below the foundation.

...

The indoor unit (LAW) must always be set up indoors on a flat, smooth and horizontal surface. The device must be set up in such a way that maintenance work can be carried out from the operator's side without any problems. This is guaranteed if a distance of 1m is maintained on the front. With the required height of the installation room, the space requirement, approx. 30 cm, for changing the protective anode must be taken into account (see Fig. 2.65) The installation must take place in a frost-proof room and via short cable routes.

...

The indoor unit (LAK) must always be installed indoors on a flat and smooth vertical wall. Maintenance work can be carried out from the operator's side without any problems (a minimum distance to the side is not required for maintenance work). This is guaranteed if a distance of 1m is maintained on the front. The indoor unit should be installed at a height of approx. 1.3 m. (see Fig. 2.66) The installation must take place in a frost-proof room and via short cable routes.

...

Fig. 2.64: Installation of the internal unit

The connections on the heating side of the indoor unit are provided with 1 "flat-sealing external thread. When connecting, an open-end wrench must be held at the transitions. There is a hose nozzle on the safety valve for on-site connection of a plastic hose. This must be led into a siphon or drain.

...

M Flex and System M - heat pumps
Unfilled refrigerant lines with a length of 3 m, 7 m and 10 m (MREF ...) are available as accessories for all M Flex and System M heat pumps, longer refrigerant lines are not possible.

...

Fig.2.68 Installation sketch of lifting arch (example LAK and LAW heat pump)

...

Two electrical lines must be connected to the indoor unit: the load line of the heat pump and the control voltage for the integrated heat pump manager (see appendix, chapter 3.3), (load: 3 ~; 1x 5-wire; control: 1 ~; 1x 3-wire). When designing and installing the cables, VDE guidelines and regulations as well as local conditions must be observed. Only in the case of the heat pump combination with the 9 kW outdoor unit can the power be supplied through two separate supply lines (2x 1 ~ / N / PE; 230 VAC; 50 Hz) through load sharing. Otherwise the power is always supplied via a cable (3 ~ / N / PE; 400 VAC; 50 Hz).

...

2.4.4.3 Heat source module system M / M Flex

A load line (plug + A110-X1 <> + A100-XA110) and control line (plug + A110-X5 <> + A100-X5.2) must be laid between the cooling circuit and the external unit parallel to the refrigerant line. The two connecting lines are supplied with the refrigerant lines in an appropriately preconfigured length.

...

2.4.4.4 Indoor unit system M / M Flex

At least the following electrical lines / signals must be connected to operate the heat pump: Load voltage / cooling circuit In the power supply for the cooling circuit, all-pole disconnection with a contact gap of at least 3 mm (e.g. EVU blocking contactor, power contactor) must be provided. A 1- or 3-pole automatic circuit breaker (tripping current according to device information) for the 1st or 3-phase cooling circuit module provides short-circuit protection, taking into account the layout of the internal wiring. The relevant components in the heat pump contain internal overload protection. The connection to the switch box of the refrigeration circuit is made at + A100-X1 (L, N, PE or L1, L2, L3, N, PE - observe the phase sequence).

...

Tab. 2.12: Cable plan for air / water heat pumps for outdoor installation

...

Fig. 2.76: Cable plan for air / water heat pumps for outdoor installation

Legal Notice imprint