Specifications

Step 1:
Remove lower barometric relief hood. Remove relief damper section from economizer or duct work.
Step 2:
Place relief damper section onto barometric relief damper adapter and secure with screws provided with power exhaust.
Step 3:
Place relief damper assembly into lower hood assembly where prepunched holes are in hood sides with screws from Step
1.
Horizontal Application:
Step 4:
Place power exhaust over hole in duct work and secure to duct work. Adjust support legs to level power exhaust. See
Figure 1.
Vertical Application:
Step 5:
Place over hole where hood was located and secure. See Figure 2.
2
FIGURE1
RETURN DUCT TO BE
PROPERLY SIZED FOR
AIRFLOW OF SPECIFIC
INSTALLATION
BAROMETRIC RELIEF DAMPER &
HOOD TO BE RELOCATED FROM
ECONOMIZER TO POWER
EXHAUST
PREPUNCHED HOLE FOR
RELIEF DAMPER
SECURE TO DUCT WORK
A
MODEL "A"
3 - 6 TON 23.750 REF
7 ½ TON 29.750 REF.
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