airmaster AM 1000, Installation Manual

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3.4. Ducts and Grilles
The materials needed and method of fitting the ducting
depend on the unit, the options chosen and the customer’s
order.
For this reason, we can provide only general instructions
for fitting the ducts.
The length of the ducting is calculated on the basis of the
thickness of the wall/dimensions of the roof.
NB! At the AM 1000 (Versions H, S1, S2) you have to
use Ø400 wall grilles and reduction pieces Ø400 to
Ø315 inside the wall.
NB! Please note that the duct holes in the wall must
have an outward downward gradient of 1-2% to
prevent heavy rain from entering the unit.
NB! The supply air grille for unit versions S1 and S2
should be installed with the slats facing down and
the exhaust air grille with vertical slats facing right.
NB! Exhaust air ducts and supply air ducts must be
insulated against condensation on the ducts, if they
are within the building envelope. The extract air
ducts and inlet air ducts must be insulated against
temperature loss and condensation forming inside
the ducts if they are mounted outside the building
envelope, or run through an unheated room.
NB! Condensation and heat insulation should be
performed according to standards and rules in effect.
NB! Fire requirements according to standards and
rules in effect must be observed.
NB! The installation of ventilation ducts should be
performed according to standards and rules in effect.
NB! Exhaust air ducts and supply air ducts must be
insulated against noise if they are visible.
Finally, fit a suitable circular grille with the slats pointing
downwards on the outside of the outer wall or a roof cap
up on the roof.
To avoid an increase in noise level, it is important that the
ducts should not get twisted or compressed against the
supply air spigot and the exhaust air spigot of the unit.
NB! Remember to seal around the penetrations. See
section “Sealing the Gaps Around Ducts”.
3.5. Roof Cap
2
3
1
Fit roof caps on the roof to finish off the installation of
exhaust and supply through a roof. Installation will depend
on the roof construction (3). The illustration shows which
roof caps are for exhaust (1) and supply (2).
NB! Fire requirements for the installation of multiple
systems must be observed according to the standards
and rules in effect.
3.6. Sealing the Gaps Around Ducts
Sealing of the gaps around ducts is performed as shown
in the sectional drawing below.
1
2
3
4
5
2
5
4
Application of a seal (shown here on a model with wall
ducts) is important at the ducts (3) indside and the outside
edges (4) in order to prevent draughts between the unit
(1) and the wall/roof (2) as well as between the ducts (3)
and the wall/roof (2).
Sealing on the inside between the pipes (3) and the wall/