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Compliance
Economizers meet California Energy Commission Title 24
mandatory section 120.2.i for Fault Detection and Diagnostic
controls.
Economizers meet ASHRAE 90.1 Fault Detection and Diagnostic
requirements.
Economizers meet IECC Fault Detection and Diagnostic
requirements.
NOTE: IECC requires differential return air sensor, which must be
ordered separately. See Accessory CRDIFRASN01A00.
INSTALLATION
See Fig. 1 for component locations.
NOTE: If installing economizer on 48/50LC 07-12 units, see
special section beginning on page 11. If installing economizer on
48/50FC (582K/559K, RGV/RAV) and 48/50GC (581K/551K,
RGW/RAW) units, see special section beginning on page 14.
1.
Turn off power supply(s) and install lockout tag.
2.
Remove the existing unit filter access panel. Raise the panel
and swing the bottom outward. The panel is now disengaged
from the track and can be removed. (See Fig. 2 and 3.) Set the
filter door aside for re-installation later.
3.
Remove the indoor coil access panel and discard. (See
Fig. 2.)
4.
Slide the EconoMi$er X assembly into the rooftop unit. (See
Fig. 4.)
NOTE: On small and large cabinets, be sure to engage the rear
EconoMi$er X flange under the tabs on the unit base in the return
air chamber. (See Fig. 5.)
5.
Ensure EconoMi$er X assembly is square. Screw the
EconoMi$er X system to the unit along both side flanges and
bottom flange. (See Fig. 4.)
6.
Remove the red tape securing the relief dampers for shipping
purposes.
7.
If the EconoMi$er X system will be operating with an
enthalpy outside air sensor, remove the factory installed
HH79ZZ007 dry bulb sensor from the front face of the
economizer (see Fig. 1), and install the accessory enthalpy
sensor HH57AC081 in the same location. Connect the (2)
wire gray harness with plug from the EconoMi$er X
assembly to the enthalpy sensor. See Fig. 25 for wiring
diagram. Refer to "Installing Optional HH57AC081 Outside
Air Enthalpy Sensor" section for more details on enthalpy
settings.
Actuator
EconoMi$er X
Wiring Harness
HH79AH001
Outside Air
Temperature
Sensor
Barometer Relief
Dampers
Fig. 1 — EconoMi$er X Component Locations
(CRECOMZR076A00 Shown)
Filter Access Panel
Fig. 2 — Typical Access Panel Locations
Wiring
Harness
EconoMi$er X
Fig. 4 — EconoMi$er X Installed on HVAC Unit
Outside
Air Damper
4
Outdoor-air Opening And
Indoor Coil Access Panel
Filter Access Panel
Indoor Coil Access Panel
Fig. 3 — Filter Access View
(CRECOMZR076A00 Shown
Compressor
Access Panel
HVAC Unit Filters
Insert Screw in
EconoMi$er X
Flanges
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