5.4 INSTALLINGNON-INSULATED DUCTS AND REGISTERS (CONTD)
5.4.2 CENTRAL DRAWPOINT (AS ILLUSTRATED IN SECTION 1.1.2) (CONTD)
Fresh/Filtered air ductwork (Return side connection) (cont’d)
HEPA 3100, HF 3.1 ANDHEPA 4100 UNITS ONLY (CONTD)
Fix the duct connector to the forced air unit duct using its 4 retaining screws (#8 x 3/4” long). Seal
with duct tape.
Take one end of the 8’’ flexible duct and slide it over the duct connector. Secure with a tie wrap.
Carefully seal the connection with duct tape. Identifiy the duct using the blue sticker dot included.
Attach this duct to the
FRESH AIR TO BUILDING
port (see icon on the top of the unit), using tie wrap and
duct tape.
5.4.3 RETURN-TO-RETURN (AS ILLUSTRATEDIN SECTIONS 1.1.3 AND 1.2.2)
Fresh/Filtered air ductwork (Return side connection)
Same as for Central Draw Point, described in point 5.4.2.
Stale air ductwork (Return side connection)
ALL UNITS
Locate the stale air ductwork opening at least 3’ (0.9 m) from the fresh/filtered air ductwork
connection. For the HRV 2600 and HR 2.6 units, use a steel transition (not provided, available
in hardware stores). Proceed as for the fresh/filtered air ductwork, but instead of using the blue
dot sticker to identify the duct, use the red dot. (No dots for HRV 2600 and HR 2.6 units.)
Attach this duct to the
EXHAUSTAIR FROM BUILDING
port (see icon on the top of the unit), using tie wrap
and duct tape.
5. INSTALL THE UNIT (CONT’D)