3
VERTICAL INSTALLATION
These economizers are designed to work in both a vertical and
horizontal applications. These instructions are for a vertical
installation.
1. Turn off unit power supply and install lockout tag.
2. Prepare the unit for economizer installation:
a. For units with 2 position damper installed, remove the
outside air hood. Unplug the damper actuator and
remove assembly from unit.
b. For units with manual damper installed, remove the
manual damper and hood.
3. Remove the upper panel and bottom panel (provided with the
HVAC unit) on the end of the unit to expose the return
section. (See Fig. 2.) Save the screws for use later when
replacing the panel. The panels can be discarded.
4. Remove the unit’s left side corner post and left side panel
from the unit to allow for easy economizer installation. (See
Fig. 3.)
5. Install economizer, as shown in Fig 3, into the return air
section of the unit. Be careful not to pinch the wires during
installation. The bottom of economizer will rest on the base
of the unit. (See Fig. 4.)
6. Reinstall the left side corner post on to the unit.
NOTE: The corner post will sit behind the economizer
flange. (See Fig. 5.) Screw through the corner post and
through the economizer. (See Fig. 5 and 6.)
7. Insert provided screw through the bottom left rear of the
economizer and into the unit base. (See Fig. 4.) Reinstall the
unit’s left side panel.
8. Before the economizer is secured in place on the right hand
side, remove and save the 12-pin jumper plug from the unit
wiring harness. (See Fig 7.) Insert the economizer plug into
the unit wiring harness plug. (See Fig 7 and 12.)
NOTE: The 12-pin jumper plug should be saved for future use in
the event that the EconoMi$er2 component is removed from the
unit. The jumper plug is not needed as long as the EconoMi$er2
component is installed.
Fig. 2 — Upper and Bottom Panel on end of Unit
Fig. 3 — Unit Left Side Panel and Corner Post
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in personal injury and
damage to unit.
Cover the duct opening as a precaution so objects cannot fall
into the return duct opening. Be sure to remove the cover
when installation is complete.
Indoor-fan Panel
Upper End Panel
Shipped on Base Unit
Bottom Panel
Shipped on Base Unit
UNIT’S LEFT
SIDE PANEL
ECONOMI$ER IV
LEFT
CORNER
POST
