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SK2018 CHV2-V/P-ECM-001
Technical Data
General Description
CHV2 units generate an airflow with “Coanda” effect due to particular air handling section. The unit is suitable for
installation in a suspended ceiling. Air intake is from the bottom while the air supply is parallel to the ceiling through
practical and functional intake and outlet grilles. The “Coanda” effect creates excellent circulation of air inside the room.
A condensate pump is supplied as standard part.
Construction
Cases are constructed of galvanized sheet steel with integral fan mounting rails for added strength. Fire resistant
insulation is fitted internally and externally provide both thermal and acoustic insulation.
Round diffuser
The Coanda unit is supplied with round diffusers suitably designed to generate an air flow with “Coanda” effect. The
direction of diffuser air flow can be adjusted on site.
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 and recommended for
operation at 8 bar. Coils include manual air vent and water purge.
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, brushless EC motor with
preliminary 3-speed setting that allow for precise air balancing.
Condensate pump
A condensate pump is fitted to carry water out of the unit. The pump can be withdrawn from the side casing by removing
screws. A float switch is fitted to stop the cooling action, should the pump become blocked or fail.
Fresh air
The fresh air system for CHV2 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.
Filtration
The standard filter is easily removable, is washable and is made from self-extinguishing acrylic with an efficiency of class
G2(EU2).
Microprocessor controls (EC-S1 type)— The PCB (printed circuit board) microprocessor control board relays control the
operation of the indoor fan motor, water valves and electric heater (if fitted), maintain room conditions at a user-defined
set point. Temperature settings, fan speeds and other control functions can be changed by the infrared handset or wired
wall pad.
Electro-mechanical controls (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. 40 VA 24 VAC transformer is equipped with unit optionally, which is
used to supply 24 VAC power to thermostat and modulating valve.
