3
Since 1965
MicroMetl
ACCESSORIES LIST -
The Economizer system has several
field-installed accessories available to optimize performance. Refer
to Table 6 for authorized parts and power exhaust descriptions.
Fig. 1 - Economizer Component Locations
—
(ECD-SRT12CA-D2*H Shown)
Outside Air
Sensor
(In Operating
Position)
Actuator
Economizer
Wiring Harness
Outside
Air Damper
Outside Air Sensor
(In Shipping Position)
Barometric Relief
Dampers
Table 6 —Economizer Field-Installed
Accessories
DESCRIPTION
PART NUMBER
208/230v 1PH Prop Power Exhaust for Small
Cabinet
PPD-SRT12CA-D-1V
460v 3PH Prop Power Exhaust for Small
Cabinet
PPD-SRT12CA-D-4V
208/230v 1PH Prop Power Exhaust for Large
Cabinet
PPD-SRT34CA-D-1V
460v 3PH Prop Power Exhaust for Large
Cabinet
PPD-SRT34CA-D-4V
208/230v 1PH Prop Power Exhaust for Extra
Large Cabinet
PPD-SRT05CA-D-1V
460v 3PH Prop Power Exhaust for Extra Large
Cabinet
PPD-SRT05CA-D-4V
Enthalpy Sensor (OA)
9901-2022
Differential (Return) Sensor
9901-2022-DIFF JC2
Economizer Angle Seal Kit for use on unit's
with Hinged Filter Door - for Small Cabinet
0640-0100-HDANGL
Economizer Angle Seal Kit for use on unit's
with Hinged Filter Door - for Large Cabinet
0640-0200-HDANGL
Economizer Angle Seal Kit for use on unit's
with Hinged Filter Door - for Extra Large
Cabinet
0640-0300-HDANGL
Compliance —
Economizers meet California Energy
Commission Title 24 prescriptive section 140.4 (damper leakage
etc.), and mandatory section 120.2.i for Fault Detection and
Diagnostic controls.
Economizers meet ASHRAE 90.1 damper leakage requirements
and Fault Detection and Diagnostic requirements.
Economizers meet IECC damper leakage and Fault Detection and
Diagnostic requirements.
NOTE: IECC requires differential return air sensor, which must be
ordered separately. See Accessory 9901-2022-DIFF JC2.
Outside air, return air, and relief dampers are AMCA rated.
Fig. 2 - Typical Access Panel Locations
Compressor
Access Panel
Outdoor-Air Opening and
Indoor Coil Access Panel
Filter Access Panel
INSTALLATION
Note: If installing economizer on 48/50LC 07-12 units, see
special section beginning on page 10.
Step 1:
Turn off power supply(s) and install lockout tag.
Step 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 Figure 2. Set the filter door
aside for re-installation later.
Step 3:
Remove the indoor coil access panel and discard. See
Figure 2.
Step 4:
Slide the economizer assembly into the rooftop unit. See
Figure 3.
Fig. 3 - Economizer Installed on HVAC Unit
(ECD-SRT12CA-D2*H Shown)
HVAC Unit Filters
Insert
Screw in
Economizer
Flanges
Wiring
Harness
Economizer
Note:
on small and large cabinets be sure to engage the rear
economizer flange under the tabs on the unit base in the return air
chamber. See Figure 4.
For 48/50LC 07-12 Instructions, see pages 10-12
