DORA TECH
90 LT - 120 LT
cod. 3540000800 - Rev. 02 - 09/2023
98
EN
• It does not weigh down on the equipment.
• It allows maintenance operations.
• It is adequately protected to prevent the accidental intrusion
of materials inside the equipment.
• The connection to the outside must be done with suitable,
non-flammable piping.
• The total equivalent length of the extraction pipes plus the
delivery, including grilles, must not exceed 12 m.
The table gives the characteristic data of commercial ducting
components with reference to nominal air flows and diameters
125 mm.
Data
Smooth
straight pipe
Smooth 90 °
curve
Grille
UM
Type
Effective
length
1
\
\
m
Equivalent
length
1
2
2
m
• While operating, the heat pump tends to lower the tempera-
ture of the room if the air is not ducted outside.
• A suitable protection grille must be fitted during installation
near the external air exhaust pipe, to prevent foreign bodies
from getting inside the device. To ensure maximum product
performance, the grille must be selected from those with low
pressure loss.
• To prevent the formation of condensate: isolate the air ex-
haust pipes and the ducted air cover attachments with a va-
pour proof thermal coating of a suitable thickness.
• If necessary, install mufflers to prevent noise due to the air
flow. Fit the pipes, wall entries and connectors to the heat
pump systems with vibration damping.
ATTENTION
Operating an open-chamber
hearth (e.g. open fireplace) and
the heat pump at the same time
will cause a dangerous drop in
pressure in the room.
The negative pressure can cause the return of
exhaust gases into the room.
• Do not operate the heat pump together with
an open fireplace.
• Only operate fireplaces with airtight cham-
bers (approved) with separate combustion
air ducting.
• Keep the doors of boiler rooms sealed and
closed so that the combustion air is not
drawn from living areas.
6.7 HYDRAULIC CONNECTIONS
• Connect the cold water supply line and the outlet line to the
appropriate connection points (fig. 54).
fig. 54
The table below shows the characteristics of the connection
points.
Ref. Model
90 LT - 120 LT
UM
1
Cold water Inlet
1/2”G
“
2
Hot water outlet
1/2”G
“
6
Condensate drain (*)
16
mm
ATTENTION
For the correct operation of the
device, the inlet water pressure
must be:
- maximum 0.7 MPa (7 bar);
- minimum 0.15 MPa (1.5 bar).
Содержание DORA TECH 90 LT
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