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Manual 2100-447
Page 2
INSTALLATION
BASIC INSTALLATION
1. Unpack the economizer assembly which includes
the integral economizer with attached electrical
harness, mixed air thermistor, miscellaneous
hardware and installation instructions.
WARNING
Open and lock unit disconnect switch before
installing this accessory to prevent injury or
death due to electrical shock or contact with
moving parts. Turn thermostat to off.
2. Remove and save the existing exterior blower
access and service access panels on the Bard wall
mount unit. (See Figure 1.)
3. Remove and save existing unit return air filter and
center screw in front grille. (See Figure 1.)
4. Remove and discard the exhaust cover plate.
(See Figure 1.)
5. Install economizer by inserting the economizer into
the unit to the far left side clearing the right filter
bracket. Once the economizer is fully inserted,
slide the economizer to the right until it is tight
against the back of the control panel.
(See Figure 2.)
FIGURE 1
MIS-425
SERVICE ACCESS PANEL
SCREW
EXHAUST COVER PLATE
THERMISTOR
LOCATION
BLOWER ACCESS PANEL