Page 7
Install Economizer − Horizontal
A field fabricated return air duct transition and duct inlet
must be installed in horizontal applications.
1− Remove unit end panel. See figure 9.
2− Install the downflow return air cover in horizontal
airflow applications. Secure with #10 sheet metal
screws provided in kit. See figure 9.
3− Make sure the horizontal return air cover on the back
side of the unit remains in place. The opening is used
when an economizer is not installed. See figure 10.
4− Install the economizer and R1 mixed air sensor and
connect wiring as shown in appropriately named
sections of this manual.
FIGURE 9
DOWNFLOW
RETURN AIR COVER
UNIT
UNIT END
PANEL
HORIZONTAL AIRFLOW
BACK
OF UNIT
DO NOT ATTACH
RETURN AIR
DUCTWORK
HERE
SUPPLY
AIR
RETURN
AIR
FIGURE 10
5− Install the field−fabricated return air duct transition
and duct inlet on the unit end. See figure 11. Support
the transition and duct inlet as needed.
6− Install the lower (exhaust) hood on the return air duct.
The GED should already be installed in the hood as
shown in the GED" section of this manual.
7− Install the upper hood on the unit as shown in
appropriate section of this manual.
RETURN AIR
DUCT INLET
HORIZONTAL
SUPPLY AIR
OPENING
SUPPLY
AIR DUCT
RETURN
AIR DUCT
EXHAUST HOOD
RETURN AIR
DUCT TRANSITION
OUTDOOR
AIR HOOD
TOP VIEW
BACK VIEW
EXHAUST
AIR
This opening not
used in
Horizontal
Applications
with Economizer
Barometric Relief Hood
and Dampers
HORIZON−
TAL
RETURN
AIR
OPENING
RETURN AIR
DUCT TRANSITION
ECONOMIZER
DAMPERS
RETURN
AIR INLET
SUPPLY
AIR OUTLET
FIGURE 11
TYPICAL HORIZONTAL APPLICATION
To Next Page
Loading...
Need help?
General
