Product Range

RFD

High efficiency heat recovery unit
WITH MODULATING HEAT PUMP CIRCUIT
AND SUMMER DEHUMIDIFICATION
from 300 to 600 m³/h

The new RFD 500 heat recovery units have been designed and developed to satisfy both the exchange of air (with possibility of variation in flow rate) and its heat treatment (with the possibility of controlling the supply temperature in the rooms) and for dehumidifying, during the summer season, those rooms already equipped with water sensible cooling systems.

The units in the RFD range recover the air in the areas to be treated. They recover 70% of the exhaust air temperature with integration of an existing heating and cooling system.
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SUMMER DEHUMIDIFIER FUNCTION

Outside air introduced into the building is cooler if compared to the return air, thus contributing to reduce the colling sensitive load.
During the dehumidifying process the unit produces warm water (with a temperature of 45°C) for free use (e.g. boiler DHW).

 
  • Load-bearing frame in RAL 9002 pre-painted galvanised sheet metal;
    Double-shell closing panels with a thickness of 20 mm, in pre-painted galvanised sheet metal RAL 9002 outside and galvanised inside; hinged at the bottom for easy access to the internal components.
  • Non-flammable thermoacoustic insulation in mineral wool with a density of 100 kg/m³.
  • High efficiency static heat recovery unit of >cross-flow type with aluminium plates with additional sealing; lower condensate collection tank, extended to the entire area dedicated to heat treatment.
  • Compact filters th. 96 mm with synthetic/fibre glass support in 3 non-intertwined layers. On external air intake, efficiency element ISO ePM1 50%, on ambient air intake, 50% ISO ePM2.5 efficiency element.
  • Centrifugal electric fans for inlet and exhaust with double intake forward blades equipped with EC motor and builtin control electronics.
  • Refrigerant circuit, variable capacity, with continuous heat pump (R410A) consisting of hermetic rotary compressor equipped with EC motor and specific control driver, summer evaporating coil/winter condenser with 3 rows and summer condensing coil/winter evaporator with 7 rows (with hydrophilic treatment) with copper pipes and continuous aluminium fins, bidirectional electronic expansion valve, liquid receiver, 4-way valve for reverse cycle, safety valve, high and low pressure transducers, high pressure switch, freon filter, double liquid light.
  • Internal electrical panel for management of all the power commands; temperature probes on the returned air circuit, outside air, inlet air and vent air; microprocessor regulation for automatic management of the inlet temperature and of the ambient humidity, of the hot/cold switching and of the defrost of the recovery unit and of the winter evaporator; control panel with display for setting of the parameters and for displaying of the probe and set-point values with remote control up to 200 m from the unit.
  • Possibility of connection to a supervision system through at least one of the following protocols: Modbus RTU on RS485, Modbus TCP/IP on Ethernet network, BACnet TCP/IP with B-AAC profile on Ethernet network, Wen Server with trend on Ethernet network.

 

(A) input temperature ≤ 24°C; balanced air flow rates (B) input temperature ≥ 22°C; balanced air flow rates (1) outdoor air at -5°C 80% RH, ambient air at 20°C 50% RH; nominal air flow rate (2) outdoor air at 32° C 50% RH, ambient air at 26°C 50% RH; nominal air flow rate (3) ambient air at 26°C 65% RH, inlet water temperature 15°; outlet 20°C (4) with ventilation regulation signals and heat pump at the maximum permissible value

It is possible to adapt the intake and exhaust dampers to the system according to the configurations shown below, even when the unit is already installed.

 

EXTERNAL BY-PASS SYSTEM BPL

Set of components installed (by the customer) outside the unit, provided only if the configuration of the same is with M90 and E90 fans, capable of creating, controlled by the on-board electronics, an additional circuit external air (external free-cooling air) in direct communication with the supply fan.

The Kit consists of:

  • Servo-controlled damper on the main fresh air intake (1)
  • Ducted module on free-cooling air intake with servo-controlled damper (as opposed to the previous one) and high efficiency filter that can be extracted from below.

 

With reference to the nominal operating conditions, the following table shows the sound power values (SWL) in octave band and the related results; the sound pressure values (SPL) at 1m, 5m and 10m in supply, in return and outside of the unit are also highlighted, under ducted unit conditions.

 

 

The graphs provide an indication of the useful static pressure (P a) as the airflow [m3/h] supplied by the base inlet unit varies. Consult the technical bulletin to check the specific data of the unit’s aeraulic performance.

LMF Clima - Ferraro Group

Via Paradiso, 33
Meledo di Sarego (VI) - 36040, ITALIA

Phone: +39 0444 821279

Fax: + 39 0444 820323

E-Mail: [email protected]

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