Technical data
www.dimplex.de 01.2012 | Project planning manual for heat pumps for heating and domestic hot water preparation | 19
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
Laying electrical connecting and main cables in the ground.
Wall openings for connecting pipes
Condensate drain (frost-proof)
Follow federal building codes if applicable
Installation
Heat pumps for outdoor installation are equipped with specially
coated panels and are therefore weatherproof.
The device should always be installed on a permanently even
and horizontal surface. Frost-proof paving slabs or foundations
are suitable as a base. The entire frame should lie directly on the
ground to ensure a good soundproof seal and to prevent the
water-bearing components from becoming too cold. If there are
any gaps, these should be sealed with weatherproof insulating
material.
ATTENTION!
The heat pump is designed for installation on even ground. If the
installation conditions differ (installation on a platform or flat roof) or
there is a greater risk of the heat pump tipping over (due to an exposed
position or high wind exposure), additional protection against tipping
over must be provided.
NOTE
When using Dimplex heat pumps close to the sea, the high salt content in
the air may lead to increased corrosion. Heat pumps can be used at dis-
tances of 12 km and above from the sea with no problems.
NOTE
In cases of installation close to a wall, there may be more sediment in the
air inlet and outlet areas due to the air current. The colder outside air out-
let should discharge in such a way as to not increase the heat losses in
heated neighbouring rooms.
Minimum clearances
It must be possible to carry out maintenance work without hin-
drance. This can be ensured by maintaining a clearance of 1.2 m
from any solid walls.
Sound insulation measures
The lowest noise emissions are achieved if, from the air outlet
side at a surrounding distance of 3-5 metres, there is no sound
reflection through reverberative surfaces (i.e. facades).
Additionally, the foundation can be covered up to the height of
the covering panels with sound-absorbing material (e.g. bark
mulch).
Noise emissions from heat pumps depend on their respective
sound power levels and the installation conditions. Please refer
to Chapt. 5 on page 56 for more detailed information about the
interrelationship between the factors influencing acoustic emis-
sions, sound propagation and acoustic immissions.
Air short circuit
The heat pump must be installed in such a way that the air cooled
by the extraction of heat is blown out freely. In cases of installa-
tion close to a wall, the air outlet must not face towards the wall.
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.
Fig. 2.2: Minimum distances for maintenance work and parallel connection
of heat pumps
NOTE
The minimum clearances for maintenance work can be found in the re-
spective installation instructions.
Electrical connection cable
An electrical connecting cable is required when operating air-to-
water heat pumps set up outdoors. This enables the heat pump
manager installed in the technology room to control all electrical
components in the heat pump (e.g. compressor, expansion
valve).
Table 2.1: Overview of electrical connecting lines
NOTE
The connecting lines must be ordered as a separate accessory and se-
lected according to the heat pump type.
ATTENTION!
The electric connecting lines are available in the lengths 10, 20, 30 and 40
m. It is not permissible for the customer to extend the control cable.
ATTENTION!
The mains cable must be laid separately from the control cable to
guarantee problem-free signal transmission. The electrical connection
cables must be laid in a protection tube with a diameter of at least 70 mm.
Order reference Heat pumps Length
EVL 10U - EVL 40U
LA 9TU - LA 40TU
LA 35TUR+
10 – 40 m
EVL 10UE - EVL 40UE
LA 6TU
LA 60TU
10 – 40 m
EVL 996-1 - EVL 999-1
LA ..AS
LA ..PS
LA ..MS
LA ..TAS/LA ..MAS
10 – 40 m
EVL 10R - EVL 40R LA ..R 10 – 40 m