Technical data

ManualsBrandsDimplex ManualsHeat PumpLA 6 MI

22 | Project planning manual for heat pumps for heating and domestic hot water preparation | 01.2012 www.dimplex.de

2.3 Air-to-water heat pumps

Volume flow/pressure drop diagram, heating water connection cable (HVL)

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 0.007 mm)

The diagram shows the pressure drop in the heating water con-

nection cable depending on the volume flow per meter. The fol-

lowing table shows the available heating water connection ca-

bles.

Table 2.3: Heating water connection cables

NOTE

With high-efficiency air-to-water heat pumps, the hydraulic connection

can be led out either downwards or to the side (special accessories re-

quired). With installation the heat pump close to a wall, above-ground in-

feed of the heating water connection cables into the building is possible.

2.3 Air-to-water heat pump for indoor installation

Costs for indoor installation

 Air circuit (e.g. ducts)

 Wall openings

 Condensate drain

General

An air-to-water heat pump should not be installed in the living

quarters of a building. In extreme circumstances, outside air as

cold as -25 °C may pass through the heat pump. This can lead to

the formation of condensation in the area around wall openings

and air duct connections in rooms with high humidity, e.g. kitch-

ens and laundry rooms, eventually resulting in damage to the

building. The formation of condensation cannot be avoided

(even with good thermal insulation) if the ambient air humidity

exceeds 50 % and the outside temperature is below 0 °C. Un-

heated rooms such as cellars, storerooms, and garages are

therefore more suitable installation locations.

NOTE

For a higher degree of sound protection, the air outlet should be over a

90° bend, or outdoor installation should (Chapt. 2.2 on page 19) be se-

lected.

If the heat pump is installed on an upper floor, the load-bearing

capacity of the ceiling should be checked. Installation on floors

above wooden ceilings is not recommended.

NOTE

If the heat pump is installed above inhabited rooms, constructional meas-

ures for solid-borne noise insulation are required.

Air circuit

Air-to-water heat pumps installed indoors must be supplied with

a sufficient air volume flow to ensure efficient and smooth opera-

tion. This is based primarily on the respective heat output of the

heat pump and is between 2,500 and 9,000 m³/h (see "Device

information" manual). The minimum dimensions for the air duct

must be observed.

Air circulation from the air intake through the heat pump to the air

outlet should be as unhindered as possible, so that any unneces-

sary air resistance is avoided (Chapt. 2.3.7 on page 25).

2.3.1 Requirements placed on the installation location

Ventilation

The room in which the heat pump is installed should preferably

be ventilated with outside air so that the relative humidity level re-

mains low and the formation of condensate is avoided. Conden-

sate can form on cold components in particular during system

commissioning and when the building is being dried out.

ATTENTION!

The heat pump must not be operated without appropriate air circulation

because of the risk of injury caused by rotating parts (fan).

Air permeability in buildings

The air permeability must not exceed certain limit values depend-

ing on the building type and technical equipment. These limit val-

ues are defined in DIN 4108-7 "Heat Insulation and Energy Sav-

ing in Buildings - Part 7 Air Tightness in Buildings". The

procedure for measuring a building and how the heat pump

measurement is to be taken into account is defined in DIN EN

13829 "Determination of Air Permeability of Buildings".

















3UHVVXUHGURSLQP



K

3UHVVXUHGURSLQ3DP

[

[



 





 



Type Length