Daitsu FDLA-09, Installation, Operation & Service Manual

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SK2018 GLOBAL FDLA-V/P-AC-001
General Description
The Duct Fan Coil is designed to meet and exceed the demanding requirements for efficiency and quiet operation.
Structure
The structure is made from heavy gauge galvanized steel panels with couplings for the connection of ducting and a gravity
drain pan with insulation for condensation. Fire resistant insulation is optional for internal case to provide both thermal and
acoustic insulation. Insulation is also fitted on the top of coil.
Condensate Pans
Positive sloped drain pans are steel and powder coated with self-extinguishing closed cell expanded polyethylene with
thermal properties. The drain pan outlet is
3/4” (s tandard on the same side of coil connections).
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 (363 psi) and recommended for
operating at 8 bar (116 psi). Coils include manual air vent and water purge valve.
Fan Wheels
They are double inlet forward curved centrifugal type. Wheels are statically and dynamically balanced for smooth, quite
operation. The housing is constructed from heavy gauge galvanized steel with die-formed inlet cones.
AC Motor
Standard motors are PSC, permanently lubricated type with internal thermal overload protection. The unit is using 3-speed
AC motor.
Air filter
It is easily removable and washable and is made from self-extinguishing acrylic with an efficiency of class EU2 (G2)
(Merv 2-4). G4 (Merv 8) efficiency is as optional.
Complete Function Control (AC-S1 type)
The PCB (printed circuit board) Modbus microprocessor controls functionality of the indoor fan motor, water valves (ON/OFF)
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 controller.
Terminal Strip (T1 type)
Terminal block is preinstalled and connected to AC motor. The motor can be controlled by external thermostat. 40VA (24VAC)
transformer is optional which supplies power to thermostat and modulating valve.
Terminal Strip (T2 type)
A 24VAC relays board is used to drive 3-speed AC motor. 40VA (24VAC) transformer is optional and supplies power to
thermostat and modulating valve.
Casing with insulation (Optional)
Coil with insulation on top
Sides with insulation
Fan Deck
Drain pan with insulation