Carrier 50FF 020 Installation, Operation And Maintenance Instructions page 15

7 - POSITIONING AND INSTALLATION
Position A
Return
Supply
Position C
Note: Position A is best suited for gas burner roofcurb. In this
position it is easier to access the burner register. It is also the
most optimal solution in areas where snow can accumulate.
Position the remaining screws on the four corners of the roofcurb.
Use a screwdriver to line up the roofcurb, adjustable angle pieces
and reinforcing angle piece holes opposite each other. Do not
tighten the screws fully.
After levelling the roofcurb perfectly, secure the adjustable angle
piece to the roofcurb using self-tapping screws or spot welds.
Tighten the reinforcing angle pieces down onto the joists.
Insulation and waterproof sealing
Following insulation is standard for the roofcurb:
■ Self-adhesive rubber gasket of 9 mm around its entire perimeter
and the crossbeams.
■ Thermal insulation of 9 mm on the outer faces of the ducts of
supply and return. It is only placed inside the supply duct in the
case of burner roofcurb (in which case the optional insulation
A2-s1, d0 (M0) can be selected).
■ Insulation of 3 mm on the panels that support the outdoor unit
to prevent condensation build-up.
Note: Acoustic and thermal insulation in this part of the roofcurb
is recommended.
Position B
Supply
Return
Position D (NO)
Important: It's the responsibility of the installer the insulation and
sealing upsweep around the roofcurb to ensure that water does
not penetrate the roof.
The upstream of the sealing must
always end below the drop edge of
the roofcurb.
This sealing must be continuous
around the roofcurb. Check all joints.
The recommendations given on the following images should also
be followed:
■ Detail of the roofcurb installed on the roof (position C):
Upper profi le of 40
mm for waterproof
sealing
Upper profile
of 40 mm for
waterproof
sealing
External insulation
(to be carried
out by the installer)
Sealing upsweep, that must be
performed on all sides of the roofcurb
(to be carried out by the installer)
Self-adhesive rubber
gasket of 9 mm
Insulation of 9 mm
on the ducts of
supply and return
Insulation of 3 mm
on the outdoor unit
Drop edge
Self-adhesive
rubber gasket
of 9 mm
(standard)
Insulation of 9 mm on
the ducts of supply
and return (standard)
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