Specifications

1. INSTALLATION
Horizontal/Vertical Economizers
1. Attach mixing box to unit evaporator return,
using the metal securing strip provided.
Fasteners may also be used around the
perimeter of the mixing box, at the location of
the filter frame, for additional security. This is
intended to connect the units, and not to support
the full weight of the economizer mixing box –
ADDITIONAL FIELD SUPPORT IS REQUIRED.
This may be from the ceiling, or from beneath
the unit.
2. Determine which inlet will be outside air, and
which will be return air. If the normal
open/closed position of the dampers needs to be
reversed, remove the actuator, reset the damper
positions so that the outside air damper is
closed and the return air damper is fully open.
Adjust the linkage rod to these normal positions,
and secure. Reattach the actuator so that it is
rotating in the appropriate direction.
3. The module is connected to the unit wiring via a
2-part wiring harness. Minimal field rewiring of
the unit is required in order to accommodate the
Air-Side Economizer option. Refer to Section 6
for detailed instructions. Connect the wiring
harness to the microprocessor board as
indicated in Section 4 – Wiring Harness
Installation.
4. With the power to the module, the actuator
springs will wind and lock. The enthalpy
changeover setting may be altered, and the
outside air damper minimum position adjusted.
See the attached Honeywell information for
details.
Prior to installing or servicing the
unit, lock all electrical power supply
switches in the OFF position. Failure
to disconnect power supply may
result in electrical shock or even
death.
Additional field support of the mixing
box is required. Failure to provide
adequate support for the unit may
result in injury or even death.
Exercise care when working around
the sharp metal edges of door panels
or flanges. These edges are sharp
and can cause injury.