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Section 2. INSTALLATION – Typical Chassis Unit –
cont.
Supply Air Connection.
Chassis units should always have a ducted discharge to the outlet grille to
prevent 'short circuiting' of the conditioned air back into the unit. The
connection options are the same as the return air with 4 options available. Using
the fixed spigot supplied as standard with the unit or one of the 3 connection
options shown on page 4 of the manual.
Option 1. Fixed spigot.
Connect suitable sized ducting (by others) directly onto the fixed spigot
supplied with the unit.
Option 2. Telescopic duct section by Biddle.
Attach outer section to return air spigot using screws provided, the inner section
of the duct with external bends fits against the rear of builderwork apperture.
Adjustment of the duct is between 100mm and 160mm.
Option 3. Spigot Extension Piece by Biddle.
Attach to the unit using screws provided. If the ducting needs to be longer than
100mm, attach suitable ducting (by others) to the extention piece.
Option 4. Discharge Plenum by Biddle.
Attach to the unit using screws provided. Allows connection of circular ducting.
Position Of CO2 Sensor.
The chassis Innovair unit is supplied with a factory wired CO2 sensor located
within the return air void. During installation the CO2 sensor need to be removed
from the Innovair unit and located aboe the nearest ceiling return air grille to
enable accurate measurement of the CO2 level within the room. The CO2
sensor is provided with a 3m long flying lead.
Page 12
v2.1
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