Field Installed Assembly and Installation
8 ACC-SVN261A-EN
5. Secure the economizer assembly with two screws 22 at the
bottom of the corner posts.
6. Install 21 and secure with three screws 23.
7. Using field supplied silicone, apply sealant around
econ
omizer hood 24.
Figure 7. Removing the bottom blockoff
Figure 8. Fastening the economizer and bottom
blockoff
Horizontal Configuration
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric pow
er, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is present
with a voltmeter.
The economizer must be remove
d from the rooftop unit and
reconfigured for horizontal operation.
1. Remove filter access panel.
2. Remove 2, shown in Figure 1, p. 6. (Leave the screws
l
oosely in place.)
3. Remove the bottom three screws and top two screws from
the
economizer panel.
4. Remove 15, shown in Figure 5, p. 7.
5. Pull the economizer assembly and end panel out of the
un
it.
6. Reconfigure the damper for h
orizontal operation. See
“Reconfigure the Damper (for Horizontal Installation only),”
p. 6 for instructions, and then return to this procedure.
7. If optional sensors for humidity and temperature
mon
itoring are to be used (FIAENTH001* and
FIAENTH002*), install them now. Use the instructions
provided in those kits.
8. Remove supply and return duct covers from the horizontal
o
penings and install over the downflow openings.
9. Reinstall the economizer. See “Install Economizer into the
Rooftop Unit,” p. 7 for instructions.
Minimum Position Setting
To adjust the minimum position setting and check out the
economizer, the power must be connected.
1. Close the unit disconnect and place the zone sensor fan
selector in
the fan ON position and the heat/cool selector
in the OFF position. This will place the damper in the
minimum ventilation position.
2. To adjust the minimum position setting for the required
ve
ntilation air, use the Symbio™ service and installation
mobile app or Symbio™ 700 on-board UI to adjust the
economizer minimum position setpoint BAS in the
fresh/return air settings menu. The damper will open to this
se
tting each time the blower circuit is energized.
When adjusting minimum position, the damper may
move
to the new setting in several small steps. Once the
damper has remained in position for 10 - 15 seconds
(second screw
not visible)
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