3
Fig. 2 - Typical Outdoor-Air Section
Access Panel Locations
Compressor
Access Panel
Outdoor-Air Opening and
Indoor Coil Access Panel
Filter Access Panel
Fig. 3 - Hood Assembly
A
B
C
Hood Top and
Side Assembly
Hood Divider
D
ECONOMIZER P/N
A
B
C
D
SHIP WT.
ECD-SRT12SA
33.37” 17.43” 19.05” 29.5”
55 lb
ECD-SRT34SA
40.37” 22.28” 24.48” 36.27”
80lb
ECD-SRT05SA
52.92” 27.03” 33.41” 49.92”
98lb
NOTE:
The ECD-SRT05SA hood has 2 aluminum filters and a hood
filter divider that installs between the filters. (See Fig. 4A.)
Fig. 4 - Filter Installation
Hood Top
Filter Clip
Outside Air
Cleanable
Aluminum Filter
Barometric
Airflow
Hood
Divider
Fig. 5 - Economizer Installed in HVAC Unit
(ECD-SRT12SA Shown)
HVAC Unit Filters
Insert
Screw in
Economizer
Flanges
Wiring
Harness
Damper
Controller
Economzier
Fig. 6 - Rear Economizer Flange Installation
(ECD-SRT12SA and ECD-SRT34SA Only)
Unit Filter
Rack
Unit Base
Economizer
Hold Down Tab
Economizer
Rear Flange
Economizer
14. While unit and economizer are open install and wire any other
accessories and/or sensors as applicable and convenient, per their
installation instructions and/or the Configuration section of this
instruction. This includes the differential return enthalpy shipped
with the ECD-SRT**SA-DWZS models, see figure 13 for details.
Some accessories require that unit ducting already be installed.
NOTE: If also installing a power exhaust accessory, skip step 15 and
follow the power exhaust instructions instead.
15. Install the economizer hood over the economizer. Use
screws
provided. (See Fig. 10.)
Fig. 4A - Hood for ECD-SRT05SA Economizers
Hood Filter
Divider
Rain
Diverters
