Category: Technical information associated with Daikin Modular Heat
Reclaim Units
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Daikin Airconditioning UK Ltd
Modular Heat Reclaim Units
Daikin Hi-VRV
Daikin Hi-VRV system is the combination of VRV air conditioning and
HRV (heat reclaim ventilation) operated by Daikin’s building management
systems such as I-Manager or for smaller systems I-Touch Controller.
HRV recovers the heat energy lost through ventilation, thereby
maintaining a comfortable and clean environment. This also reduces the
load on the air conditioning system and conserves energy.
In addition when the HRV is operating independently, the fan in a
interlocked indoor unit continues turning, so the dust does not fall
from the air filters ensuring a cleaner environment. HRV interlocks with
Daikin’s VRV, Sky Air and other air conditioning systems and
automatically switches over to ventilation mode, further increasing the
effects of energy conservation.
The current line-up includes models with DX coil and or humidifier – the
DX coil helps prevent the direct impact of cold airflow upon personnel
during the heating cycle and vice versa. High static enhances design
flexibility.
Features in HRV VKM Units
- Humidifier
- DX Coil
- High Static Pressure
HRV Units
Energy Efficiency
Over 30% size reduction is achieved by use of the high efficiency
paper (HEP) element and optimised design of the fan and airflow
passages. A reduction of up to 40mm in height allows the main unit to
fit easily into limited spaces such as ceilings.
On average 28% air conditioning load reduction (maximum 40%):
- 20% by operating in total heat exchange mode (in comparison with
normal ventilation fans)
- a further 6% by auto-ventilation mode change over switch
- a further 2% by pre-cool, pre-heat control (reduces air
conditioning load by not running the HRV while air is still clean
soon after the air conditioner is switched on)
The heat exchange element uses high efficiency paper (HEP) possessing
superior moisture absorption and humidifying properties.
The heat exchange unit speedily recovers heat contained in latent heat
(vapour).
The element is made of a material with flame resistant properties and is
treated with an anti-moulding agent.
If the outdoor air suction temperature falls below -10ºC, the unit
switches to intermittent operation to prevent freezing of the heat
exchanger element and dew condensation within the unit.
Intermittent operation = a thermistor (standard equipment) within the
unit detects the outdoor air temperature. Unit operation varies
according to the detected temperature.
The slim design of the HRV unit enables it to be mounted in narrow
ceiling voids and irregularly shaped spaces. The unit can be installed
horizontally in accordance with the conditions of the location.
Sound pressure levels are low at 20.5dBA (as measured in an anechoic
chamber).
Operation of the air conditioner using the remote control is interlocked
with HRV operation, greatly simplifying overall system control. The same
remote control centralizes air conditioning and ventilation operations,
precluding any need for HRV remote control installation work. Using a
centralized remote control also frees the user to choose from a wide
range of control systems that integrate air conditioning equipment, the
user can build.
- Individual control
- Simultaneous ON/OFF of HRV & air conditioner (BRC1D527)
- ON/OFF of HRV (BRC301B61)
- Independent operation of HRV
- Airflow rate switching (initial setting)
- Ventilation mode switching (initial setting)
- Self diagnostic functions
- Filter sign display & reset
- Timer settings, simultaneous control with air conditioner
(BRC1D527)
- Timer settings (BRC301B61)
- Fresh-up mode switching (selectable: supply rich mode, exhaust
rich mode, initial setting)
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