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Configuration
VALUE
IDF Low Heat
0 to 100%,
Speed
66% default
IDF High Heat
0 to 100%,
Speed
100% default
0 = Demand Based
Occupied Fan
1 = Continuous
0 = Disabled
Unoccupied Fan
1 = Demand Based
NOTE(S):
a. See the Controls, Operation, and Troubleshooting guide for details on Supply Pressure (SP) reset.
STEP 8 — CONFIGURE OUTDOOR AIR DAMPER
Navigate to the Outdoor Air Damper Configuration screen (Main
Menu System Config OAD Config). Review the OAD po-
sition configurations and adjust as need. See Fig. 76 for Outdoor
Air Damper Configuration screen layout. When finished, click the
save changes button
at the bottom of the screen.
For all applications, verify that proper building pressure relief
(barometric or power exhaust) is operational before operating
the unit with the outdoor air damper open. Operating a unit
with outdoor air without proper building pressure relief can
cause doors to push open, damage to building and roofing
materials, and damage to HVAC equipment.
NOTE: The OAD Configuration screen will only display when
the economizer (OAD) is enabled on the Configure Equipment
screen.
The OAD configuration screen is used to set the OAD operation,
ventilation control, and position restrictions. Free cooling is
configured on a separate screen. The OAD positions are all based
on 0 to 100% range. See Table 15 for outdoor air damper configu-
rations by application.
Table 14 — Indoor Fan Configurations by Application
IDF low heat speed is only used as part of SAV demand or SAV capacity IDF control
for units with a heat source.
IDF high heat speed is used as part of CV, SAV demand, or SAV capacity IDF control
for units with a heat source.
The IDF will only operate when there is a demand for cool, heat, vent, or dehumidify
during the occupied period. Demand based IDF should only be used for single zone A/
C applications where the RTU does not provide zone ventilation.
The IDF will operate continuously during the occupied period. Recommended for 100%
OA applications or single zone A/C applications where the RTU provides zone
ventilation.
The IDF is off during the unoccupied period. Required for 100% OA applications.
The IDF will only operate when there is a demand for cool, heat, vent, or dehumidify
during the unoccupied period. This configuration must be set for the RTU to provide
unoccupied cooling, heating, dehumidification, or venting.
CAUTION
DESCRIPTION
Fig. 76 — Outdoor Air Damper Configuration Screen
For all applications, verify that proper building pressure relief
(barometric or power exhaust) is operational before operating
the unit with the outdoor air damper open. Operating a unit
with outdoor air without proper building pressure relief can
cause doors to push open, damage to building and roofing
materials, and damage to HVAC equipment.
47
a
(cont)
APPLICATION
CAUTION
SZ A/C
Any
SZ A/C
Any
Any
SZ A/C
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