Weather-Rite XT112 Installation, Operation & Service Manual - page 54
Manual is about: XT-Series Direct, Gas-Fired, Industrial Air Handler
of
98
S
ERIES
XT I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
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/
Return 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