A+++
A++
ErP
A+
A
B
C
D
GUF-RDH4
Monoblock indoor unit with fresh air intake fan,
stale air exhaust fan, filtration system, Lossnay
total heat recovery module, bypass shutter,
permeable film humidifier and direct expansion
coil.
RDH4 Series
GUF-50RDH4 GUF-100RDH4
Cooling capacity 5.46 (DX coil: 3.63, Lossnay core: 1.83) kW Heating capacity Cooling capacity 11.17 (DX coil: 3.63, Lossnay core: 3.85) kW Heating capacity
6.18 (DX coil: 4.17, Lossnay core: 2.01) kW 500 m³/h 220-240V 50Hz single- 12.50 (DX coil: 8.30, Lossnay core: 4.20) kW 500 m³/h 220-240V 50Hz single-
phase phase
12. EA (Exhaust air)
Stale indoor air is vented after
the sensible and latent heat contained 11. Intake fan
1. OA (Outdoor air)
in the air has been recovered
The outdoor air flow
by the Lossnay core 10. Optional high efficiency filter
necessary for ventilation
is aspirated by
the delivery fan 9. Delivery fan
2. Heat recovery unit
(Lossnay core) Heat and
humidity exchanged between
incoming outdoor air and
outgoing stale air 8. RA (Intake air)
The intake fan aspirates
stale air from the indoor
3. Maintenance space, which is then exhausted
access hatch
7. SA (Air delivered to indoor space)
4. Air filter Appropriately treated outdoor air
Prevents Lossnay delivered to indoor space
core from fouling
5. Direct expansion coil 6. Permeable film humidifier
Heats or cools outdoor air flow If necessary, humidifies outdoor
air flow to ensure comfort
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Lossnay technology
The Lossnay total heat recovery module has a cross-flow plate in previous generations, have been further reduced in size to
fin structure and heat transfer diaphragms in special treated reduce the possibility of the passage of waterborne soluble gases
paper. The excellent thermal transfer properties and permeability such as ammonia and hydrogen. To increase heat and moisture
to moisture of this special paper ensure the highly efficient exchange, a special treatment is applied to the paper used for
exchange of both sensible and latent heat between the two air the diaphragms. These improvements have increased moisture
flows passing through the recovery core. The result is a ventilation permeability while reducing permeability to harmful gases,
system with outstanding characteristics ensuring extremely high resulting in an overall increase in recovery efficiency and a more
levels of comfort and wellbeing in the environment treated, which effective barrier action against the transfer of these gases.
can also cut operating costs substantially.
The incoming fresh air and outgoing stale air cannot mix within
the core. The diaphragm pores, which were already microscopic
CONSTRUCTION AND OPERATING PRINCIPLE OF LOSSNAY UNIT
Stale air exhaust EA SA Outdoor air
delivered to
indoor ambient
(pre-cooled or pre-heated)
Outdoor Ambient
OA RA Stale air
(hot or cold) intake
Outdoor fresh air
VENTILATION
Heat exchanger Total comfort
A direct expansion coil incorporated in the unit makes it possible to Maintaining the correct humidity levels in an indoor space ensures
cover approximately 25% of the load of the system with the GUF the ideal conditions for comfort and prevents the unpleasant side-
unit. This also means that the terminal units installed in the indoor effects typical of an environment with insufficient humidity such as
space can be smaller. Moreover, as the GUF unit covers the entire dry eyes and throat.
thermal load attributable to ventilation, this means that this load and The evaporation surface area is approximately 8.5 times larger
the ambient load can be managed completely separately, simplifying than in a comparably sized natural evaporation humidifier, while
the design process of the installation. The treated air heats the performance is 6 times greater.
humidifier as it passes through it, further increasing humidification
efficiency.
IN GENERAL
GUF – For optimum indoor air quality
GUF = (Lossnay) + (heating & cooling)
Lossnay energy recovery
IMAGE OF GUF MODEL
DX coil
(heating & cooling)
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GUF-RDH4
Humidification
The innovative permeable film humidification system, which uses a Maintaining the correct humidity levels in an indoor space ensures
natural evaporation process, is a particularly intelligent solution. the ideal conditions for comfort and prevents the unpleasant side-
The efficiency with which the air is humidified has been significantly effects typical of an environment with insufficient humidity such as dry
increased by reducing the resistance of the material used. A three- eyes and throat.
layer film ensures that only the necessary moisture is transferred The evaporation surface area is approximately 8.5 times larger
to the air without any limescale dust release – a problem of certain than in a comparably sized natural evaporation humidifier, while
conventional humidifiers. performance is 6 times greater.
Note: Use a demineraliser if residual total salt levels exceed 100 mg/l.
Increased efficiency of humidification process
Optimised air flows within the unit together with a water
injection system have significantly increased the efficiency of the
humidification process. The system also controls the humidity in the Moisture
transfer filter Three dimen-
outgoing stale air to effectively improve the air quality of the outdoor based on sional fabric
environment as well. This solution prevents limescale and silica dust ultra-water
from being carried in the air, so purer, less dusty air is vented into the repellent
outdoor environment. cells
Humidity
All-new
Water filter
Automatic free cooling
When the air conditioning is operating in cooling mode and the
outdoor temperature is lower than the indoor ambient temperature “By-pass”
(as normally occurs at night-time in summer), the GUF indoor unit Bypass shutter
recognises this condition and automatically bypasses the recovery
Exhaust air Stale air
core. The cooler outdoor air fed into the indoor space contributes
to reducing the cooling demand sustained by the system. Outdoor air Air delivered into room
LOSSNAY core
Dust suppression Automatic regulation
An optional high efficiency filter may be used for up to 3,000 hours GUF ventilation and recovery units may be integrated into
while maintaining a filtration efficiency (evaluated with colorimetric a Melans control and regulation system for Mitsubishi Electric
testing) of over 65%. The filter may also be fitted in the GUF unit air conditioner installations, as they use the same bus used for
after initial installation and takes up no additional precious space. connecting indoor units.
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Installazione flessibile Advantages
The positions of air duct connections may be changed as needed • Reduced energy consumption
to cater for different installation requirements. • Reduced thermal power necessary to treat outdoor air, equating to
lower rated power
• Healthier environment
Std. installation Possible alternative configurations for special cases
• Quieter operation (noise baffles in inlet and outlet)
• Free Cooling function using exclusively external air
• Humidification with film permeable to water vapour only
• Total air treatment (neutral air returned to outdoor environment)
• Custom temperature and humidity control
EA OA EA OA EA OA
• Compact dimensions
* Changing the installation configuration causes no any additional pressure loss. • Installable in double ceilings with limited vertical space.
Compliant with ErP Directive, Lot 11
EU Regulation 327/2011, effective from 01.01.15, implements the
conditions specified in Directive ErP 2009/125 to encourage the The European Union has set a series of very challenging environmental
targets which must be attained by 2020.
design and manufacture of environmentally compatible energy These targets are grouped together and described with the general
consuming products with the goal of reducing CO2 emissions and title “20/20/20 Package”, indicating an increase of 20% in the use of
renewable energy sources over 1990 together with a reduction of 20% in
energy consumption by 20% by 2020. primary energy source consumption and CO2 emissions.
All fans and ventilation units with electric motors with a rated power
absorption between 125 W and 500 W fall within the scope of
application of this regulation. Mitsubishi Electric GUF-50RDH4 and
GUF-100RDH4 outdoor air treatment units are compliant with this
20 %
less consumption of primary
20 %
increase in renewable
20 %
less CO 2 emissions
energy sources energy sources
directive.
VENTILATION
TECHNICAL SPECIFICATIONS
MODEL GUF-50RDH4 GUF-100RDH4
Communication system Serial communication via M-NET network: Mitsubishi Electric Air Conditioner Network System
Heat exchanger Cross fin
Lossnay core Exchange process Total (sensible + latent) air-air heat recovery
(heat recovery core) Exchange material Special treated paper for partitions and spacers
Casing Galvanised sheet steel
Heat insulation material Self-extinguishing polyurethane foam
Motors 2 totally enclosed 4-pole permanent-capacitor induction motors
Fans Delivery: Centrifugal, ø 220 mm - Intake: Centrifugal, ø 220 mm Delivery: Centrifugal, ø 245 mm - Intake: Centrifugal, ø 245 mm
Filtration material Synthetic fabric
Ambient operating conditions From 0 to 40 °C with max. 80% RH
Functions Lossnay recovery / Free cooling / High-Low speed switching
Dimensions, HxLxW mm (in.) 317 x 1.016 x 1.288 (12-1/2” x 40” x 50-3/4”) 398 x 1.231 x 1.580 (15-11/16” x 48” x 62-1/4”)
Weight 57 kg (61 kg when filled with water) 98 kg (106 kg when filled with water)
Power Single-phase, 220-240 V, 50 Hz
Ventilation modes Lossnay recovery Free Cooling bypass Lossnay recovery Free Cooling bypass
Fan speed High / Low High / Low High / Low High / Low
Current consumption A 1.15 / 0.70 1.15 / 0.70 2.20 / 1.76 2.25 / 1.77
Power absorption W 235-265 / 150-165 235-265 / 150-165 480-505 / 385-400 490-515 / 385-410
Air flow m3/h 500 / 400 500 / 400 1000 / 800 1000 / 800
(l/s) 139 / 111 139 / 111 278 / 222 278 / 222
Effective overpressure Pa 125 / 80 125 / 80 135 / 86 135 / 86
Sensible heat recovery efficiency % 77 / 80 - 79 / 81.5 -
Sensible heat recovery In heating mode 66 / 71 - 70 / 74 -
efficiency In cooling mode 61.5 / 66 - 64.5 / 68.5 -
Heating power kW 6.42 (4.17 direct expansion coil / 2.25 Lossnay core) 13.00 (8.30 direct expansion coil / 4.70 Lossnay core)
Cooling power kW 5.29 (3.63 direct expansion coil / 1.66 Lossnay core) 10.81 (7.32 direct expansion coil / 3.49 Lossnay core)
Equivalent indoor unit power P 32 P 63
Humidifier Humidification Permeable film
Humidification capacity in
2,7 kg/h 5,4 kg/h
heating mode
Water supply pressure min. 20 kPa – max. 490 kPa
Sound pressure at 1.5 m below centre dB(A) 33.5-34.5 / 29.5-30.5 35-36 / 29.5-30.5 38-39 / 34-35 38-39 / 35-36
Peak current Less than 2.8 A Less than 6.0 A
Insulation resistance Min. 10 MOhm. (measured with 500 V DC megohmmeter)
Dielectric strength 500 V AC Hz for 1 minute
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