Hrv-With Dx Coil-(Heat Reclaim Ventilation) Vkm-Ga(M) Series - Daikin VRV III Manual

Features
6.8

HRV-With DX Coil-(Heat Reclaim Ventilation) VKM-GA(M) Series

6.8.1 General
• Interlocked operation with VRV
• (Controls of interlocked operation for energy saving : The remote controller for air conditioner can be used, so
special remote controller for HRV is unnecessary.)
• Mounted for Direct expansion coil unit for outdoor air treatment
• Changeover function for ventilation mode to Auto/Manual
• FRESH-UP operation (Selectable : Supply air rich mode or exhaust air rich mode ; initial setting)
• Mounted for Water flow type Natural evaporating humidifier
• Possible to attach the High efficiency filter
• Attaching the Power supply terminal for easy connection
• Quiet operation
• Changeover function for air flow rate to High/Low (Ultra-high setting is possible.)
• The power supply of HRV is commonly used with the air-conditioner (Single-phase 220-240V, 50Hz)
• Filter sign display and reset
• Timer setting
Features of Direct Expansion Coil
• Draftless ventilation in Heating.
• High humidifying function.
How to use this unit
• This unit should be used with air conditioners.
• Air conditioning is impossible only by this unit, because this unit does not have temperature control function. (It's
capacity is too small in order to control the room temperature to the whole)
And should be operated in combination with standard indoor units. (Interlocked operation)
• Independent operation without taking an interlock with indoor units is possible, however, temperature
setting by remote controller is impossible.
In this ON/OFF operation by thermostat depends on factory setting, however, this value is changeable by setting
mode on site.
• Model selection should be done not by cooling capacity but by ventilating air flow rate.
6.8.2 Design Flexibility
6.8.2.1 Efficient Fan Performance Produces a High Static Pressure
Improvements to the fan, including the use of multi-arc
blades, a thinner scroll and optimized fan scroll angle,
help to boost efficiency.
Higher static
pressure
Double suction
The fan diameter
has been
α
increased and the
blade width
optimized to suit,
resulting in higher
static pressure.
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Higher static pressure
and reduced noise
Multi-arc blades
The use of multiple,
overlapping arc-shaped
fan blades makes it
possible to optimize the
chord length and blade-
outlet angle. This results
in higher static pressure
and quieter operation over
the entire usage range.
Rotating currents
for reduced loss
Resin scroll
The use of a thinner
scroll makes it possible
to rectify the rotating
currents within the scroll.
Higher static pressure
and reduced pressure loss
Fan scroll angle
In addition to increasing
the scroll wrap angle θ
and boosting the static
pressure, the outflow
angle α has been
optimized to reduce
θ
pressure loss in the
outflow area.
Dramatically higher static pressure is achieved due to
improved fan performance. This reduces limitations on
unit placement and allows more flexibility in duct design.
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ED34-862
General Information