3
Installation Instructions
STEP 3
Platform Height Adjustment
1.
In most AZ75/AZ85 to AZ90/91 conversions the existing platform will need to be lowered to accommodate the new
AZ90/91 vertical air conditioner. Having the correct platform height will ease installation of the unit by allowing the
back of the unit to slide right into the transition plenum, the sealing gasket should be lubricated with soapy water or
similar solution to reduce the friction between the side of the unit and the gasket.
2.
Refer to the installation instructions that came with the unit to complete the installation. Platform height varies by
chassis size (see below for details).
Printed in the United States
Inside
Wall
Rigid
Ductwork
Platform
Surface
Platform
Surface
Transition
Plenum
Opening
3/4”
Transition
Plenum
Opening
Platform
Surface
1-1/2”
Small Chassis
Platform Height
Large Chassis
Platform Height
