SERIES XT INSTALLATION, OPERATION AND SERVICE MANUAL
48
Table 11: Configuration Chart
FIGURE 26: Air Handler Styles
Air Handler
Configuration
Air Flow Air Volume Control
Make Up Air (MUA) 100% Outside Air Constant -
Fixed Recirculation (FR)
Non-adjustable ratio of
20% outside air and
80% return air
Constant -
Air Management (AM)
Adjustable ratio of 20%
outside air and 80%
return air to 100% out-
side air and 0% return
air
Constant
Building Pressure
Controls Outside/
Retu rn Air Ratio
Variable Air Volume (VAV) 100% Outside Air
Variable
50% -
100%
Building Pressure
Controls Air
Volume
Requirement
MUA - MAKE UP AIR (All Models) FR - FIXED RETURN (All Models)
VAV - VARIABLE AIR VOLUME (All Models)AM - AIR MANAGEMENT (All Models)
Floating Damper Floating Damper
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