Conventional dehumidification system DESHU / HPE+

Description

 

The DESHU / HPE+ is covered by a 20-year anti-corrosion guarantee

The ventilation, air conditioning and dehumidification solution DESHU / HPE+ provides optimum air quality for high humidity environments. This double flow air handling unit is delivered ready to operate. The design of our heat pumps and the selection of the components used guarantee a high degree of reliability. Thanks to its full aluminium structure (frame & casing), the DESHU / HPE+ unit is covered by a 20-year anti-corrosion guarantee.

The DESHU HPE+ double flow air conditioning and dehumidification unit operates as a reversible heat pump:

• Source: inside air
• Treated fluid: Internal air + Hygienic air

Dehumidification is ensured by the heat pump cooling cycle coupled with a heat pipe. The heat pipe recovers heat without external energy supply. This allows significant energy savings and compressors’ size reduction by 30 to 50%, which results in lower electricity consumption. Exhaust air is dried up firstly through a precooling process on the heat pipe and then through a final cooling on the evaporator. Calories are then transferred to the supply air side, firstly to the other part of the heatpipe and secondly to the air condenser, to heat the dehumidified air. Supply air temperature at the condenser outlet is higher than air temperature at the unit inlet because of latent heat recovery and energy supplied by the compressors.

The unit offers several operating modes:

• Dehumidification through fresh air modulation without thermodynamics
• Thermodynamic dehumidification with heat recovery on the air-cooled condenser
• Thermodynamic dehumidification with heat recovery on the water-cooled condenser (if option selected)
• Thermodynamic cooling with a reversible heat pump (if option selected)
• Thermodynamic cooling mode with heat recovery on auxiliary water-cooled condenser (if option selected)

The ETT packaged unit comprises 3 different sections:

1. The exhaust air section ensures dehumidification and energy recovery
2. The separate technical section houses the refrigeration components, the electrical board and the control components.
3. The supply air section ensures air change and room air treatment.

Available options

Frame – Casing

• Motorised external damper on supply air (2006/42/EC Directive)
• Painting
• Porthole
• Packaged unit
• 2-block unit

Acoustics

• Technical section acoustic insulation using STOPFLAM flexible fire-proof polyurethane foam
• Fresh and exhaust air cowl sound insulation
• Compressors acoustic jackets

Air handling

• Magnehelic dial pressure gauge at each filtration stage
• Filters fouling analogue control (FFAC)
• Actuating smoke detector with battery back-up
• G4 refillable filters
• Set of spare 98 mm G4 filters
• 98 mm F7 or F9 opacimetric filters
• 292 mm polypropylene polydihedral opacimetric filters on supply air side only
• Aluminium salt filter on return air side

Thermodynamics

• HP and LP pressure gauges
• Electronic expansion valves

Thermal exchangers

• 3-stage electric heater
• Triac
• 4-row hot water coil with analogue frost protection thermostat
• Mounted progressive 3-way valve hot water
• Mounted stop valve + TA regulating valve on inlet
• Heat pipe heresite coating
• Hot water coil heresite coating
• Heating coils heresite coating

Electricity

• Phase checker
• Unit global energy metering

Installation

• 200 or 400 mm aluminium feet

Recovery

• SRF: exchanger for DHW preparation through subcooling (please consult us for performances) (except for 107 – 109 units)
• PHM: domestic hot water production system (please consult us for performances) (except for 107 – 109 units)
• Stainless steel water-cooled condenser with freon 3-way valve including water flow controller with automatic reset
• Titanium water-cooled condenser with freon 3-way valve including water flow controller with automatic reset
• CPVC stop valve on water-cooled condenser