Smoke And Fire Protection - Daikin RoofPak RPS Series Installation And Maintenance Manual

Smoke and Fire Protection

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.
Figure 97: Smoke Detector Schematic
IM 926-3 • ROOFPAK APPLIED SYSTEMS
WARNING
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.
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Unit Options
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