210.100-IOM (JUL 2021)
Page 30
AcuAir Hygienic Air Units
Installation
Connecting the weather hood
directly to the AcuAir fresh air
opening
1.
Apply polyurethane caulking to the flange of the hood.
2. Align the hood over the opening. Check for adequate
clearance to doors and other openings on the air-han-
dling unit.
3. Attach the hood to the unit using sheet metal screws
through the unit casing. On openings requiring multiple
hoods, repeat this procedure for each of the hoods.
4. Carefully, remove excess polyurethane caulking from
around the flange of the hood.
NOTICE
Any penetration of cabinet skin causes water and
air leakage. Thoroughly seal any screw, piping or
electrical holes with appropriate sealant. Self tapping
screws are not weather tight.
Figure 35: Connection of weather hood(s) to unit
Figure 36: Weather hood installation
POLYURETHANE
CAULKING
SHEET METAL
SCREWS
HOODS
Field penetrations for piping and
electrical connections
WARNING
Use only metal cutting hole saws and/or blades to
make penetrations through panels. Never use a cut-
ting torch due to foam insulation.
NOTICE
For small sizes such as 1/2 in. iron pipe, 1/2 in. con
-
duit, or 5/8 in. O.D. copper and smaller, it is accept-
able to use caulk instead of a grommet.
NOTICE
Electrical conduits must be sealed internally to pre-
vent airflow and moisture condensation.
Tools required
• Drill motor.
• Pilot starter bit
• Hole saws-approximately 2 1/2 in., 3 1/4 in., and 4 1/2
in. diameter for holes
• Power cords as required
