T3 Condition Heating Possibilities Rooftop Packaged Air Conditioner
Characteristics
Structure
Panels and frame are made from galvanized steel protected with polyester powder painting to ensure total resistance to atmospheric agents.
Direct expansion coils with condensate drain tray.
Hermetic compressor
High efficiency scroll compressor for the whole range, with built-in thermal overload cut-out and crankcase heater, mounted on rubber vibration dampers
Ripple type acoustic insulation for compressor section, and thermal insulation for coil and fan section, low noise
Centrifugal fan
Forward curve centrifugal fans for air treatment section and axial fans for condensation section
Front, side and underside air discharge of the treatment unit
High external pressure, long air supply distance
Electric panel
Electric panel consists of breakers and contactors for compressors and fan motors, phase sequence relay and other necessary protection devices for the main components
Easy operation line controller
Cooling/Heating/Auto
Error indication
Timing on/off
Electric heater
The electric heater comprises of shielded resistance heaters, which are smooth stainless steel tubes 6 W/cm2
capacity. High temperature limit control offers overload protection and is set to 90°C and located at less than 150mm after electric heaters. This is provided as a standard
feature on the electric heater, with the electric power supply cables made of reticulated silicon rubber, resistant to temperatures up to 200°C. For any rooftop unit size,
three sizes of electric heater are available, S (standard), M
(Medium) and H (high).
Hot water coil
Hot water coils offer fully modulating control through the use of a 3 way valve. The hot water coil, connections and valves are all tested at pressure of 15 bars. Frost protection is provided by forcing the opening the 3 way
valve when supply temperature from hot water coil falls below 8°C and by stopping the outdoor fan when that
supply temperature falls below 6°C. In addition to that, the 3 way valve is also opened at 10% value if the
outdoor temperature falls below an adjustable value.
Hot water coils are always factory fi tted, wired and fully tested, prior to shipment.
Optional
Economizer with fresh, return air dampers and fresh air hood
Free cooling function for low ambient temperature
Low ambient control device for operation of outdoor units at ambient temperatures from less than 20°C down to -10°C
BMS devices
T3 (Tropical climate)
Roof curb
Metal / aluminum filter
Heat recovery to 100%
Evaporating section: double skin with 50mm polyurethane foam
Optional water heating coil
Metal or plastic mesh on condenser coil
Optional supply / return air configurations
Upgraded plug fan
G4 filter, plate and bag filter
Technical Data
* Performance values refer to the following conditions:
Cooling: room air temperature 27.0°C DB RH 50%, ambient air temperature 35°C;
Heating: room air temperature 20.0°C DB, ambient air temperature 7°C DB / 6°C WB.
** Noise level measured by adopting average value in the noise lab with background noise of 25 dB(A), at a distance of 1.5m high fan speed.
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