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IM 893-10 • ROOFPAK SINGLEZONE UNITS 78 www.DaikinApplied.com
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Smoke and Fire Protection
DANGER
Improper smoke, fire, or fume air handling can result in
severe personal injury or death.
Daikin optionally offers factory installed outdoor air, return
air, and exhaust air dampers as well as smoke detectors in
the supply and return air openings, complete with wiring and
control. These components often are used in the building’s
smoke, fume, and fire protection systems. However, due to
the wide variation in building design and ambient operating
conditions into which our units are applied, we do not represent
or warrant that our products will be fit and sufficient for smoke,
fume, and fire control purposes. The owner and a fully qualified
building designer are responsible for meeting all local and
NFPA building code requirements with respect to smoke, fume,
and fire control.
Smoke Detectors
Field installed smoke detectors in the return air ductwork or
the supply air ductwork can be coordinated with the units
operation through the unit controller’s binary input, D14. This
input in wired to TB2 and the supply air smoke detector can be
wired between terminals 103 and 104 and the return air smoke
detector can be wired between terminals 104 and 105. The T2
transformer supplies 24 V (ac) across each of these terminals
and a dry set of contacts can be wired to these terminals
respectively. This and additional wiring information can be seen
on the input wiring schematics at line number 220.
Factory installed smoke detectors have similar wiring and the
control sequence is as follows:
When smoke is detected by either sensor, the normally closed
sensor contacts open. This removes power from binary input
B18 on the main control board.
The Microtech III controller responds by shutting down the
unit. The controller is placed in the Alarm Off state and cannot
be restarted until the alarm is manually cleared. Refer to the
operation manual supplied with the unit for information on
clearing alarms.
The smoke detectors must be reset manually once they have
been tripped. Power must be cycled to the smoke detector to
reset.
Emergency Shutdown
The terminals 105 & 106 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.
Figure 77: Smoke Detector Schematic
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