General Description

The Duct Fan Coil is designed to meet and exceed the demanding requirements for efficiency and quiet operation.

STRUCTURE

Structure is made from electrostatic coating steel panels completed with couplings for the connection of ducting and gravity drain condensate pan with insulation. Fire resistant insulation is fitted internally to provide both thermal and acoustic insulation. Insulation is fitted on the top of coil.

Chilled Water Coil

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 (360 PSI) and recommended for operation at 8 bar (120 PSI). Coils include manual air vent and water purge valves.

Fan Selection

Impeller is centrifugal double inlet double width type made of galvanized steel, dynamically and statically balanced. All Direct Drive Horizontal Units have fan motors of 3-speed, 220V-240V, single phase, 50Hz/60Hz, permanent split-capacitor with ball bearing and build-in automatic reset thermal overload protection. The motor’s insulation is class B and IP20 as standard. Class F and IP44 is as optional. All Units feature quick disconnected motor connection when removing fan(s)/motor(s) for service. The external mounted electrical junction box for field wiring terminations is provided as standard.

AIR FILTER

The filter is easily removable and washable and is made from self-extinguishing acrylic with a class EU2 (G2) (Merv 2-4) efficiency rating. G4 or F8 (Merv 8, 14) efficiency filter is optional.

DRAIN PAN

The drain pan fits a drain pipe of Ø 21mm (on both left and right side of drain pan) and is with fire resistant insulation.

Terminal Strip (T1 type)

A 230VAC 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.

Complete Function Control (iFCU-AC-S1 type)

The main design features include:
~ 2-pipe, 2-pipe with booster electric heat, 2-pipe with primary electric heat, 4-pipe with 6 way valve installed. ~ Cool, Heat, Auto, Dehumidifier and Fan modes.
~ Sleep, Auto-Fan, Daily Timer, Auto-Restart with memory functions.
~ User friendly remote control handset.
~ Heat and cool temperature protections and safety cut out.
~ 2-way and 3-way on/off or modulating valve control.
~ Wired wall pad controller (optional)
~ Manual control panel in cabinet.
~ Auxiliary switch for cooling and heating signal.
~ Occupancy (remote on/off) contacts / economy mode contacts.
~ Open Modbus communication protocol.

Variable water flow system

The water flow through the fan coil is controlled by a temperature difference between the flow and return pipework – referred to as Δt, to ensure the correct heat transfer from the water to the air. Constant Δt keep the unit running efficiency and consequently the whole life running costs of the system.