Daikin Rebel Applied DPSA Installation And Start-Up Manual page 50

Ventilation Override Control
An Optional ventilation override control feature provides three
contact inputs inputs pre-wired in the unit control panel for
overide control in the event of an emergency. They are all
designated on a field wired terminal strip in the low voltage
control panel.
Sequences - the ventialtion control feature allows for one of
the following sequences to be performed.
NOTE: For all Sequences the Emergency OFF contact
should be open.
1. Ventilate: When the digital input for Ventilate is active,
the Outdoor air damper is opened to 100%.
2. Pressurization: When Pressurization is active, the
Outdoor air damper is opened to 100%, and the Supply
Fan Ramps to Vent Capacity. SAF Vent Capacity is
adjustible in the MircoTech 4 under
Menus\SAF Set-Up\SAFVentCap
3. Purge: When Purge is active, the return damper is held
shut and the Exhaust fan ramps to Vent Capacity. RFEF
Vent Capacity is adjustible in the MicroTech 4 under
Menu\Advanced Menus\RFEF Set-Up\RFEFVentCap
Figure 53: Smoke Detector Schematic
IM 1287 • REBEL APPLIED ROOFTOP
Emergency Shutdown
The terminals 205 & 206 on TB2 can be used for any field
supplied component that requires a unit emergency shutdown.
When these terminals are used, the factory installed jumper
must be removed.
Freeze Protection
An optional freezestat is available on units with MicroTech 4
control that have hot water, chilled water, or steam heating
coils. The sensing element is located on the downstream
side of the heating coil in the heating section of the unit. If
the freezestat detects a freezing condition and closes, the
MicroTech 4 controller takes different actions, depending on
whether the fans are ON or OFF. The freezestat is an auto
reset type of control; however, the controller alarm that it
causes is manually reset if the fan is on and auto reset if the
Main Menu\Advanced
fan is OFF.
Main
50
Unit Operation
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