Daitsu FDLA-09, Installation, Operation & Service Manual

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SK2019 FCSD(H)-V/P-ECM-001
Technical Data
General Description
The Ceiling cassette units make each served area an independent controlled temperature zone to suit diverse requirements.
Construction
Cases are constructed of galvanized sheet steel with integral fan mounting rails for added strength. Fire resistant insulation is
fitted internally to provide both thermal and acoustic insulation. The RAL9010 fascia is constructed of high-impact polystyrene.
Coils
Constructed with seamless copper tubes and headers. The tubes are mechanically expanded into corrugated aluminum fin
material for a permanent primary to secondary surface bond. Coils are tested at 25 bar and recommended for operating at 16
bar. Coils include manual air vent and water purge valve.
Fan
The backward-curved centrifugal fan is statically and dynamically balanced for quiet operation. Fan impellers are made from
fire-retardant plastic for lightweight and corrosion-resistant operation.
EC motor
The unit is using EC motor include driven controls PCB, a constant torque, permanent magnet, EC motor with preliminary 3-
speed setting that allow for precise air balancing.
Filtration
Reusable wire framed filters are fitted and may be vacuum cleaned. G4 efficiency HAF filter is as optional.
Condensate pump
A condensate pump is fitted to carry water out of the unit. The pump is fixed to a mounting bracket. The pump can be withdrawn
from the bottom after removing the front panel. A float switch is fitted to stop the cooling action, should the pump become
blocked or fail.
Louver
Louver vanes are manufactured from ABS to prevent condensation from forming, automatic adjustable and driven by stepping
motors on unit.
Fresh air
The fresh air system for cassette unit allows up to 15% of unit airflow (maximum air flow per connection is 100m
3
/h) as fresh
air intake (per connection). Maximum 2 fresh air connections per unit are allowed.
Microprocessor control (EC-S1 type)
The PCB (printed circuit board) Modbus microprocessor controls functionality of the indoor-fan motor, water valves (ON/OFF
or modulating) and electric heater (optional), to maintain room conditions at a user-defined set point. Temperature settings,
fan speeds and other control functions can be changed by either infrared handset or wired wall pad.
Electro-mechanical control (EC-W1 type)
A 230VAC signal from the thermostat which working power is from L and N or from indoor room to terminal H/M/L supplies
power to limited PCB. When any of H/M/L is powered ON, the stepping motor is working and open the louver at maximum
position. When all of H/M/L is powered OFF, the stepping motor will close the louver. The condensate pump will run
continuously, as long as coil temperature is less than 15°C. Alarm notification and zone control function are available. 40VA
24vac transformer is equipped with unit optionally, which is used to supply 24Vac power to thermostat and modulating valve.