Installing The Air Ducts; Open Flue Operation; Functioning With Outside Air; Installation - Junkers SUPRAECO W HP 270 Installation And Operating Instructions Manual

5.3

Installing the air ducts

Inlet air can be taken from the room where the appliance is installed,
from another room or from the outside. In the last two cases, ducts must
be assembled in the air inlet.
To ensure maximum appliance performance and avoid
condensation in the outer ducts surface, use thermally
and acoustically insulated ducts.
Choose a room for the air inlet. Observe the average air temperature and
maximum required air flow rate (
resistance as possible, install the air inlet and air outlet ducts (Ø 160
mm) as straight as possible. The length of the ducts for the air inlet and
air outlet must not exceed 6 m. Do not install more than two 90° bends.
For each additional bend, reduce the duct length by 1 m.
Duct length for the air inlet and air outlet
Reduction for each 90° bend
Table 5
To ensure that condensate forming in the air inlet and air outlet ducts
drains from the appliance:
B Install air ducts at a slight angle to the opposite side of the air inlet and
air outlet apertures on the top side of the appliance.
B Limit the pressure drop in the lines to 10 Pa to ensure a minimum inlet
3
air flow rate of 330 m /h as well as the stated heating output.

5.3.1 Open flue operation

If the heat pump can be operated using the air in the installation room,
ensure that the room has a volume greater than 20 m
1
2
Fig. 12
[1] Air inlet
[2] Air outlet
SUPRAECO W – 6 720 646 161 (2012/04)
Tab. 4). To achieve as little air
Ø 160 mm
6 m
1 m
3
.
6720645393-07.2V
L2
L
T 1
L1
L = L1+C1+L2
T1
L = L3+C2+L4
T2
L = L + L
T1 T2
≤
Ø 160mm: L 6m
Fig. 13 Corresponding duct length (L)

5.3.2 Functioning with outside air

When using outside air, assure that the ducts are protected with the
correct accessories.
5.4

Installation

NOTICE: Damage to the ducts due to improper
handling!
B Do not allow ducts to become contaminated during
installation.
B If necessary, flush the ducts with water prior to
commissioning.
It is advisable to purge the installation beforehand, the
presence of dirt may reduce the flow and, in extreme
cases, cause a blockage.
It is recommended that a water filter be installed at the
the appliance's cold water inlet.
NOTICE: Corrosion damage to the storage tank's
connections!
If the connections are copper:
B Use an isolation fitting
This extends the service life of the magnesium anode.
1) Accessory not included in standard delivery
B Determine the nominal diameter of the room's water installation.
Please note the current water pressure and the expected pressure
drop.
B Carry out the water installation in accordance with the applicable
regulations. Please observe the local regulations on DHW
installations.
B The water pipes can be rigid or flexible. To avoid corrosion, take into
account the behaviour of the materials used in the pipework and the
connections.
Installation
C1 C2
L
2 T
L3
6720645393-08.3V
1)
for the hydraulic connection.
L4
15