2
ACCESSORIES LIST
The economizer
has several field-installed accessories available to
optimize performance. Refer to Table 4 for authorized parts and power
exhaust descriptions
INSTALLATION
1.
Turn off unit 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.)
3. Remove the indoor coil access panel and discard. (See Fig. 2.)
4. The economizer hood components are shipped with the economizer.
Remove hood from packaging. The hood top and sides are shipped
factory assembled.
NOTE:
If the power exhaust accessory is to be installed on the unit,
the
hood shipped with the economizer will not be used and may be discarded.
Save the aluminum filter for use in the power exhaust hood assembly.
5. Insert the hood divider between the hood sides. (See Fig. 3) Secure
hood divider with 2 screws (provided) on each hood side. Screws
should go through the hood sides into the divider. The hood divider
is also used as the bottom filter rack for the aluminum filter. On
hood for ECD-SRT05SA economizer install filter divider. (See Fig.
4A.)
6. Set the economizer upright. (See Fig. 5.)
7. Slide the damper assembly into the rooftop unit. (See Fig.
5). On
ECD-SRT12SA and ECD-SRT34SA be sure to engage the rear
economizer flange under the tabs in the return-air opening of the
unit base. (See Fig. 6)
8. Secure the economizer to unit along side and bottom flanges
using
the screws provided.
9. Remove the tape securing the relief dampers in place.
10. Remove and save the 12-pin jumper plug from the unit wiring
harness (located in the upper left corner of the unit). Insert the
economizer plug into the unit wiring harness. Refer to Fig. 7 for
wiring diagram.
NOTE: The 12-pin jumper plug should be saved for future use, in the
event that the economizer is removed from the unit. The jumper plug is
not needed as long as the economizer is installed.
11. The outside air sensor may be taped to the front economizer
divider
plate for shipping purposes. Relocate sensor to operating position as
shown in Fig. 1.
12. Remove the indoor fan motor access panel. (See Fig. 8.)
13. The supply air temperature sensor looks like an eyelet terminal or
probe with wires running to it. The sensor is located on the “crimp
end” and is sealed from moisture. Mount the supply air temperature
sensor (provided) to the lower left section of the indoor fan blower
housing. (See Fig. 9.) Use the screw provided and use existing hole.
Connect the violet and pink wires to the supply air temperature
sensor. (See Fig. 7.)
Table 3 - Economizer Sensor Usage
APPLICATION
Outdoor Air
Dry Bulb
ECD-SRT**SA-DWFS includes (MM PN 9901-0183) fixed dry
bulb sensor. ECD-SRT**SA-DWDS includes
(MM PN 9901-2251) C7660 adjustable dry bulb sensor
Single
Enthalpy
ECD-SRT**SA-DWES includes (MM PN 9901-0018) C7400
OA enthalpy sensor
Differential
Enthalpy
ECD-SRT**SA-DWZS includes a (MM PN 9901-0018) C7400
OA enthalpy and (MM PN 9901-0018) C7400 differential RA
enthalpy
CO
2
for
DCV Control
Using a
Wall-Mounted
CO
2
Sensor
8002-WMDM
CO
2
for
DCV Control
Using a
Duct-Mounted
CO
2
Sensor
8002-XVDM
Table 4 - Economizer Field-Installed
Propeller Power Exhausts and CO2
DESCRIPTION
PART NUMBER
ECD-SRT12SA Prop. Power Exhaust 208-230 v 1Ph
PPD-SRT12TA-D-1VC
ECD-SRT12SA Power Exhaust 460 v 3 Ph
PPD-SRT12TA-D-4VC
ECD-SRT34SA Power Exhaust 208-230 v 1 Ph
PPD-SRT34TA-D-1VD
ECD-SRT34SA Power Exhaust 460 v 3 Ph
PPD-SRT34TA-D-4VD
ECD-SRT05SA Power Exhaust 208-230 v 1 Ph
PPD-SRT05TA-D-1VD
ECD-SRT05SA Power Exhaust 460 v 3 Ph
PPD-SRT05TA-D-4VD
Return Air CO
2
Sensor (4 to 20 mA)
8002-XVDM
CO
2
Room Sensor (4 to 20 mA)
8002-WMDM
Fig. 1 - Economizer Component Locations
—
(ECD- SRT12SA-DWDS Shown)
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury and/or
death.
Disconnect power supply and install lockout tag before attempting to
install accessory.
!
W7212
CONTROLLER
OUTSIDE AIR
DAMPER
RELIEF
DAMPER
Table 2 - Package Contents
PACKAGE NO.
QTY
CONTENTS
ECD-SRT12SA
ECD-SRT34SA
1
1
1
18
1
1
Hood Top and Sides
Hood Divider
Aluminum Filter
Screws
Damper Assembly
Supply Air Temperature Sensor
ECD-SRT05SA
1
1
1
2
1
1
1
Hood Top and Sides
Hood Divider
Hood Filter Divider
Aluminum Filters
Hardware Bag
Damper Assembly
Supply Air Temp Sensor
Note: ECD-SRT**-DWZS models also include a differential
enthalpy in hardware bag for field installation in return duct.
