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E1DAMP20 MOTORIZED OUTDOOR AIR DAMPER
C1DAMP10 MANUAL OUTDOOR AIR DAMPER
FILTER BRACKET SIDE VIEW
HOOD TOP
FILTER
HOOD TOP SEAL
FIGURE 21
LHT units. Refer to manufacturer’s instructions included
with transition for detailed installation procedures.
E-E1ECON15C-2 Standard and E1ECON17C-1 High
Performance Economizer (Field or Factory Installed)
horizontal air discharge applications. The economizer
uses outdoor air for free cooling when temperature and/
or humidity is suitable. An economizer hood is furnished
with the economizer.
NOTE - Gravity exhaust dampers are required with power
exhaust.
The economizer is controlled by the A55 Unit Controller.
The economizer will operate in one of four modes. Each
following is a brief description. See economizer installa-
tion instruction for more detail.
1-“TMP” MODE (SENSIBLE TEMPERATURE)
and RT17 Outdoor Air Sensor to determine suitability of
outside air and economizer damper operation. When out-
door sensible temperature is less than return air sensible
supplemented by mechanical cooling to meet comfort de-
mands. This application does not require additional op-
tional sensors.
2-“ODE” MODE (OUTDOOR ENTHALPY)
-
vided and -installed Honeywell C7400 enthalpy sensor
and humidity (enthalpy). When outdoor air enthalpy is be-
-
lates to allow outdoor air for free cooling.
3-“DIF” MODE (DIFFERENTIAL ENTHALPY)
air opening and the other sensor is installed in the return
air opening. When the outdoor air enthalpy is below the
door air for free cooling.
4-“GLO” MODE (GLOBAL)
Global Mode - The “GLO” or global mode is used with an
energy management system which includes a global con-
trol feature. Global control is used when multiple units (in
one location) respond to a single outdoor air sensor. Each
-
door sensor which is installed and wired by the controls
contractor.
Motorized Outdoor Air Damper - The “GLO” mode is also
used when a motorized outdoor air damper is installed in
the system.
NOTE - All economizer modes of operation will modulate
dampers to 55 F supply air.
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