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ETT has developed a new generation of rooftop units: the EFFICIENCE range. This Eurovent certified range is the fruit of many years of experience in Ecodesign and modular heat pumps production.
EFFICIENCE range modular design offers you numerous possibilities. The EFFI+ DX is based on an EFFI+ packaged unit combined with an extraction module and a rotary heat exchanger module to adjust unit performance to the specificities and requirements of your application.
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20-year guarantee against corrosion
The EFFI + DX is a NEW GENERATION double flow heat pump with energy recovery, specifically designed for the ventilation, heating and air conditioning of large areas such as superstores, warehouses, etc. This rooftop unit combines the latest technological developments to ensure optimised energy consumption.
The EFFI+ DX ventilation and air conditioning solution gives priority to energy recovery, allowing substantial energy savings. It is recommended in case of high level of fresh air inlet.
This double flow rooftop heat pump with rotary heat exchanger is delivered ready to operate and can be installed either on a rooftop or at ground level depending on your needs.
Thanks to its full aluminium structure (frame & casing), this unit is covered by a20-year guarantee against corrosion (frame and casing).
The unit works as an air to air reversible heat pump coupled with a double flow vertical rotary heat exchanger on the fresh air/exhaust air side:
- Source: outside air
- Treated fluid: internal air
The DX module offers several operating modes:
The DX module operates:
- in all recycling mode during vacancy periods or when no hygienic fresh air is required
- in air conditioner/heat pump mode
- in Free Cooling mode with maxi 50% fresh air compared to rated air flow rate
- Heating mode: In winter, comfort temperature is maintained thanks to the thermodynamic system and the auxiliaries (optional), with heat recovery on exhaust air.
- Cooling mode: In summer, comfort temperature is maintained thanks to the thermodynamic system with energy recovery on exhaust air.
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Free Cooling mode: In mid-season, comfort temperature is maintained using in priority the difference between outside air and inside air to cool the building.
Free Cooling allows considerable savings by delaying the use of thermodynamics. - Recycling mode: Destratification of the volume recycled, when return air temperature is significantly higher than room temperature.
The ETT packaged unit comprises 4 different sections:
- The heat recovery section adjusts the hygienic fresh air flow rate as required, while ensuring heat transfer with the exhaust air flow.
- The external section allows thermal exchanges with the outside air.
- The internal section ensures the air change and air treatment.
- The separate technical section houses the refrigeration components, the electrical board and the control components.
Frame – Casing
- Unit with Vertical (V) or Lateral (L) supply air
- Motorised external damper for supply air (2006/42/EC Directive)
- Double skin, 13/10 AG in internal section, 50 mm
Acoustics
- Technical section acoustic insulation using STOPFLAM flexible fire-proof polyurethane foam
- Exhaust air box sound insulation
- Fresh air cowl sound insulation
- Compressors acoustic jackets
Air handling
- Filtration pressure gauge
- Analog air flow controller (AFC), air flow rate indication and measurement
- Filters fouling analogue control (FFAC)
- Self-contained smoke detector backed-up or not
- Epoxy coating for wheel + fans & Vinyl coating for exchangers
- Supply air fan available pressure 400 Pa maxi
- G4 refillable filters, 98 mm thickness
- F7 or F9 opacimetric filters, 98 mm thickness
- G4 + F7 or F9 double filters (48 + 48 mm)
- High pressure supply air fans kit available for high available pressure
Thermodynamics
- HP and LP pressure gauges
- Electronic expansion valves
- Cooling operation only
- Refrigerant leak detection aid
Thermal exchangers
- 3-stage electric heater
- Triac
- 2-row hot water coil with analog freezestat
- Vinyl coating on hot water coil
- Hot water progressive 3-way valve mounted with analog freezestat
- Mounted stop valve + TA regulating valve on outlet
Electricity
- Unit global energy metering
Control
- Mini fresh air slaving using turret contacts (2 maximum)
- Year-round operation (allows compressor operation in cooling mode with -5°C < outside T° < +15°C)
- Banning of Free Cooling using specific humidity comparison
- Hygrometry probe (for external humidifier control)
Laying
- Aluminium adjustable connection roof curb
- Aluminium adjustable adaptation roof curb
- Aluminium adjustable ventilated roof curb
- Aluminium ventilated adaptation roof curb
- Aluminium plenum for return air and supply air
- 200 or 400 mm aluminium feet
