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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.
The EFFI + is a NEW GENERATION single flow heat pump, 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.
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Reversible heat pump with 20-year guarantee against corrosion
The EFFI+ heat pump offers fully optimised air treatment.
Thanks to its full aluminium structure (frame & casing) which ensures an excellent corrosion protection, this air conditioning and heating system is covered by a 20-year guarantee against corrosion (frame and casing).
This single flow rooftop heat pump is delivered ready to operate. The separate technical section facilitates service and control of the unit and allows measurement and adjustment during operation.
Performance and ease of installation are the key elements of the EFFI+: it is particularly adapted for treating large volumes and its standard frame and roof curb facilitate roof installation.
The EFFI + unit operates as a reversible heat pump:
- Source: outside air
- Treated fluid: inside air
The unit offers several operating modes:
- Heat pump
- Air conditioning
- Free cooling: cooling with outside air, without thermodynamics
In those cases, the EFFI + rooftop unit operates:
- In all recycling mode
- In all fresh air mode
- In mixing mode
The EFFI+ module offers several operating modes:
- Heating mode: In winter, comfort temperature is maintained thanks to the thermodynamic system and the auxiliaries (optional).
- Cooling mode: In summer, comfort temperature is maintained thanks to the thermodynamic system.
-
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.
The ETT packaged unit comprises 3 different sections:
- The external section allows thermal exchanges with the environment.
- The separate technical section houses the refrigeration components, the electrical board and the control components.
- The internal section ensures the air change and air treatment.
The unit is to be installed outdoors, either on a rooftop, using a standard connection roof curb and a plenum box for supply and return air connection, or at ground level or on a platform using support feet.
Frame – Casing
- Double skin, 13/10 AG in internal section, 50 mm
- Motorised external damper for supply air (2006/42/EC Directive)
- Whistle shaped cowl for fresh air on the top
Acoustics
- Technical section acoustic insulation using STOPFLAM flexible fire-proof polyurethane foam
- Fresh air cowl sound insulation
- Compressors acoustic jackets
Air handling
- Filtration pressure gauges
- Analog air flow controller (AFC), air flow rate indication and measurement
- Filters fouling analogue control (FFAC)
- Backed-up self-contained smoke detector
- Fan epoxy coating
- Supply air fan available pressure 400 Pa maxi
- Operation in all recycling or all fresh air mode (not available for public access buildings)
- G4 refillable filters, 98 mm thickness
- 1 set of spare G4 filters, 98 mm thickness
- G1 metal filters (23 mm thickness) in fresh air mode
- F7 or F9 opacimetric filters, 98 mm thickness
- G4 + F7 or F9 double filters (48 + 48 mm)
- Pressure relief gravity dampers
Thermodynamics
- HP and LP pressure gauges
- Electronic expansion valves
- Cooling operation only
- Refrigerant leak detection aid
Thermal exchangers
- 3-sequential stage electric heater
- Triac
- 2-row hot water coil with analog freezestat
- Recovery coil on food refrigeration (water)
- Mounted progressive 3-way valve hot water
- Mounted stop valve + TA regulating valve on outlet
- Vinyl coating on hot water coil
- Vinyl coating on thermodynamic coils
Electricity
- Total electrical energy metering according to 2002/91/EC
- Aluminium/copper connection terminal blocks (aluminium mandatory for power cables)
- Soft starter (compressors current soft starter)
-
230V/16 A single-phase socket in the technical section (separate power supply to be provided by the
installer)
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)
- Free Cooling banning based on specific humidity comparison
- Hygrometry probe (for external humidifier control)
- Average room temperature (4 probes)
- ETT SRV (Variable Cooling System) control, compressor with electronic expansion valves.
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
