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5
ENVISION SERIES INSTALLATION MANUAL
small, as in replacement of heating only systems, larger ductwork should be installed. All existing ductwork should be
checked for leaks and repairs made accordingly. The duct systems and diffusers should be sized to handle the design
airow quietly. If air noise or excessive airow is a problem, the blower speed can be changed to a lower speed to
reduce airow. This will reduce the performance of the unit slightly in heating; however, it will increase the temperature
rise across the air coil. Airow must still meet minimum requirements.
Equipment Selection
The following guidelines should be used when mating an Envision Split to an air handler/coil.
Select R-410A components only.
Select 12 SEER or higher air handler/coil.
Match the air handler to the air handler coil data table on page 9.
Indoor matching adjustable TXV should be used with any air handler/coil. Fixed orice or cap tube systems
should not be used.
Utilizing Existing Coil or Air Handler
It is recommended that a new R-410A air handler be installed with an Envision Split considering the long term ben-
ets of reliability, warranty, etc. versus the short term installation cost savings. However, the existing air handler may be
retained provided the following:
Coil currently is R-410A rated
Coil uses a TXV. No capillary or xed orice systems should be used
A life expectancy of more than 7 years remaining for the air handler and components
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General Installation Information (continued)