Daikin Air Conditionings new VRV heat recovery systems
features on the Daikin VRV-IV
to significant developments in heat pump technology, today’s air
conditioning systems, running on R-410A refrigerant, offer better
performances than R-22 and R-407C systems did in the past. Furthermore,
R-22 will be soon unavailable in Europe. Already today, only reclaimed
or recycled R-22 can be used for servicing. To upgrade R-22 and R-407C
systems as cost effectively as possible, Daikin units can be installed
using existing pipe work. Replacement technology is available for
residential and commercial applications and includes some new features
including PIR's and Smart-phone control.
Is it necessary to remove the existing piping?
Clever Design Built In
its most important design features is the ability to connect up to 64
indoor units (40 for VRV-IV) to a single outdoor unit in increments of
2HP up to 48HP. Outdoor unit modules can be configured on a combined
‘multi’ basis between 18 and 48HP with a single heat exchanger as
well as in a ‘stand alone’ format from 8 to 16HP with two heat
exchangers that is currently the largest single unit on the market.
VRV-IV HR also offers up to 200% overall increase in unit diversity
ratio for a single outdoor module system and 160 to 130% on double or
triple multi modules. Operating range is wide at -50C to 430C
in cooling and -200C to 15.50C in heating and the
system supports no less than 14 different format indoor fan coil units.
contemporary VRF systems, which cease operating during defrost and oil
return, alternate defrosting of the heat exchangers on VRV HR multi
module outdoor units or the dual outdoor coil of single modules allows
continuous heating to be supplied from the indoor units throughout these
cycles thereby avoiding the transmission of cold draughts of air into
the room area.
new VRV heat recovery system complements the VRV heat pump and cooling
only models. This new system represents a significant step forward in
addressing both existing and forthcoming environmental regulations. In
addition to its heat recovery facility, it also offers many design,
installation and maintenance friendly refinements.
VRV Heat Recovery takes full account of Building Regulations Part ‘L’ energy efficiency requirements. It returns significantly higher efficiencies than older VRV with an enviable 14% average increase in efficiency across the range, with the most efficient units reaching a 20% increase in efficiency. COPs and EERs of up to 4.3 and 4.1 respectively are obtained at 100% connection. This exceeds the criteria set for ECA qualification.
Increased comfort through continuous heating:
new VRV Heat Recovery system improves on delivered heating capacity
compared to other systems on the market, through changes in operation
during defrost. As each system comprises at least 2 heat exchangers in
the outdoor unit, the system will defrost these alternatively. This
results in continuous heating at the indoor unit even during the defrost
cycle. Where other VRF systems stop operating, VRV continues in heating
to maintain comfort.
range of indoor units:
VRV air conditioning brings summer freshness and winter warmth to offices, hotels, department stores and many other commercial premises. It enhances the indoor environment and creates a basis for increased business prosperity and whatever the air conditioning requirement, a Daikin indoor unit will provide the answer. VRV air conditioning can be supplied via 13 different indoor unit models in a total of 75 variations, including the new low-height round flow cassette. The maximum number of indoor units connectable to one system has increased across the range with up to 64 being connectable to the largest outdoor unit.
offers an extended piping length of 165m (190m equivalent piping length)
with a total system piping length of 1,000m. When the outdoor unit is
located above the indoor unit, the standard height difference is 50m.
This can be extended to 90m as an option. In case the outdoor unit is
located below the indoor unit, the height difference is 90m as standard.
After the first branch the longest piping length is now a maximum of
External Static Pressure:
to the increased External Static Pressure in VRV Heat Recovery to 78.4
Pa, it is now possible to install condensing units within the building
when external space is restricted.
benefit "Automatic charge function":
VRV-IV however, these 2 steps are omitted since VRV unit can be charged
with the necessary amount of refrigerant automatically via a push button
on the PCB. Automatic charging will cease once the appropriate amount of
refrigerant has been transferred.
Setup and Fault Diagnosis:
manual calculation of additional refrigerant charging volume
manual charging the unit with additional refrigerant
refrigerant charging has ceased, pushing the test operation button on
the PCB will initiate a check on the wiring, shut off valves, sensors
and refrigerant volume. This test ceases automatically when completed.
diagnostic function with controller error display:
This function operated via push button on the PCB, speeds up troubleshooting and is used for start-up and maintenance.
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E-mail: [email protected]
Orion air conditioning and refrigeration limited is a United Kingdom based distributor of environmental products including air conditioning, heat pumps, electric space heaters, gas space heaters, oil space heaters, air exchange units, dehumidifiers and refrigeration equipment.
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Last updated - 13/03/2019