27
Fig. 18 - Rigging (38VZ/PZ)
Ductwork (indoor air discharge)
The ductwork dimensions should be determined in accordance
with the air flow to be carried, and the available static pressure
of the unit. The different air flows and static pressures which
each unit can supply, are shown in the fan performance tables.
It is recommended to observe the following considerations:
-
Whatever type of ductwork is used, it should not be made
of materials which are flammable, or which give off toxic
gases in the event of a fire. The internal surfaces should be
smooth, and not contaminate the air which passes
through. It is recommended to use sheet metal ducts
which are adequately insulated to avoid condensation and
thermal leakage.
-
At the points where the ducts join the unit, it is
recommended to use flexible connections which absorb
vibrations, prevent noise inside the ductwork and allow
access to the unit.
-
Bends near the unit outlet should be avoided as much as
possible. If unavoidable, they should be as slight as
possible, and internal deflectors should be used when the
duct has large dimensions.
NOTE: All duct sizing and design work should be carried out
by qualified technicians.
Condensate drainage
50VZ/PZ and 38VZ/PZ units
The indoor unit evacuates condensate water via the condensate
pan of the outdoor heat exchanger (38VZ/PZ) which incor-
porates two male ø 3/4" gas drain connections, one for each
side of the unit. Depending on the installation site, either of
these drains can be used, and the unused drain should be plugged.
40PZ units
These units incorporate a condensate pan with a drain pipewith
an outside diameter of 25 mm.
The connection to the drain pipe can be vertical (Fig. 20) or
horizontal (Fig. 21).
•
Vertical drain: Remove the prepunched knockout(s) in the
unit base.
•
Horizontal drain: Remove the prepunched knockout(s) in
the side of the unit base.
Fig. 20 - Vertical drain (40PZ)
Fig. 19 - Rigging (40PZ)
IMPORTANT: The unit should be correctly levelled.
Field-supplied
Drain pipe OD 25 mm
Drain pan
Unit base
A
A
A