IOM / Rooftop Smart and Linéa™ Range - Page 33
DOWNFLOW ECONOMISERDOWNFLOW ECONOMISER
DOWNFLOW ECONOMISERDOWNFLOW ECONOMISER
DOWNFLOW ECONOMISER
The economiser are designed for use with standard
(downflow) SMART units.
The economiser opens a set of dampers to allow 0 to 100
percent outdoor air to be used for cooling when outdoor
humidity and temperature are acceptable.
Additional (2nd stage) cooling demand is directed to the
compressor while the dampers remain open. if outdoor air
becomes unacceptable, the outdoor air dampers close to a
predetermined minimum position while the compressor
cooling circuit cycles as needed.
Figure 37
DOWNFLOW ECONOMISER
Outdoor air dampers
Enthalpy control typical
Control access cover
Damper motor
Outdoor
air damper
hood
Factory installed
return air filter
Return air dampers
PARTS ARRANGEMENT
Figure 38
Enthalpy control
Access cover
Remote
mounting
base
Damper
motor
MIXED AIR
SENSOR
(*)
(*) : Mixed air sensor should be removed from economiser
and installed in supply air stream as shown in figure 39
MIXED AIR SENSOR INSTALLATION
Figure 39
Mixed air sensor
SENSOR
BULB
CAP TUBE
Control harness
PARTS ARRANGEMENT
Figure 40
Outdoor air
dampers
Outdoor damper
hood
Enthalpy sensor
Return air dampers
Return duct flange
Enthalpy control on
remote mounting base
Wiring harness
(connects to jackplug in
blower compartment)
FILTER
Access cover removed
NOTE : Mixed air sensor should be
removed from economiser and
installed in supply air stream as
shown in figure 39
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