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E1DAMP20 MOTORIZED OUTDOOR AIR DAMPER
C1DAMP10 MANUAL OUTDOOR AIR DAMPER
FIGURE 19
FILTER BRACKET SIDE VIEW
HOOD TOP
FILTER
HOOD TOP SEAL
D-Supply and Return Diffusers
Optional flush mount diffuser/return FD11 and extended mount
diffuser/return RTD11 are available for use with all LCM units.
Refer to manufacturer's instructions included with transi
tion for detailed installation procedures.
E-E1ECON15C-2 Standard and E1ECON17C-1
High Performance Economizer
(Field or Factory Installed)
The optional economizer can be used with downflow and
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 econo
mizer.
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
mode requires a different A55 Unit Controller DIP switch set
ting. Each mode also requires different sensors.
The following is a brief description. See economizer installa
tion instruction for more detail.
1-“TMP” MODE (SENSIBLE TEMPERATURE)
In the “TMP” mode, the IMC uses input from the factory in
stalled RT6 Supply Air Sensor, RT16 Return Air Sensor and
RT17 Outdoor Air Sensor to determine suitability of outside air
and economizer damper operation. When outdoor sensible
temperature is less than return air sensible temperature, out
door air is used for cooling. This may be supplemented by me
chanical cooling to meet comfort demands. This application
does not require additional optional sensors.
2-“ODE” MODE (OUTDOOR ENTHALPY)
The “ODE” or outdoor enthalpy mode requires a field-pro
vided and -installed Honeywell C7400 enthalpy sensor
(16K96). The sensor monitors outdoor air temperature
and humidity (enthalpy). When outdoor air enthalpy is be
low the enthalpy control setpoint, the economizer modu
lates to allow outdoor air for free cooling.
3-“DIF” MODE (DIFFERENTIAL ENTHALPY)
The “DIF” or differential enthalpy mode requires two field-pro
vided and -installed Honeywell C7400 enthalpy sensors
(16K97). One sensor is installed in the outside air opening
and the other sensor is installed in the return air opening.
When the outdoor air enthalpy is below the return air en
thalpy, the economizer opens to bring in outdoor 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
energy management system uses a specific type of out
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.
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