VRF and smaller split systems
save energy, while providing a high degree of comfort, through
their zoning capabilities. Zones or rooms can be designed to exact
needs, taking into account occupancy, solar gain parameters, and,
in the case of VRF systems, diversity of usage.
Intelligent indoor units have
sensors to measure room air temperature at the return, or if the
design requires it, air temperature can be measured at a remote
thermostat. The ability to choose the measurement location allows
for better air temperature management, maintaining the set point
within 1 degree Fahrenheit (half of a degree Celsius). Some split
and VRF system indoor units feature an i-see™ sensor accessory,
which senses and compares air and floor temperatures, and then
adjusts vane direction as needed to optimize the comfort within the
space. Also, each indoor unit features linear expansion valves to
ensure the precise amount of refrigerant is delivered to the
zone.
Mitsubishi Electric Cooling &
Heating VRF and split systems with multiple indoor (air-handling)
evaporator units connected to an outdoor compressor unit can
deliver just the right amount of refrigerant to precisely meet each
zone's load. Indoor units can be controlled to operate only in
those occupied areas that need conditioning; indoor units in vacant
areas can be turned off. By conditioning only the occupied
areas, heating or cooling capacity is not wasted.
Diversity and
Zoning
HVAC systems are sized depending
on the cooling and heating peak loads of the building; the combined
capacity of the indoor units can match, exceed, or be lower than
the capacity of the connected outdoor unit. INVERTER-driven VRF
systems can be designed and sized on a zone-by-zone basis to adjust
for a building's solar gain and the changing seasons. And,
depending on the system selected, up to 50 indoor units can be
connected to each outdoor unit, producing a total applied capacity
of up to 150% of the outdoor unit's rated capacity.
Certain VRF systems feature
simultaneous cooling and heating. Also called heat recovery, these
systems enhance the capabilities of zoning technology considerably
by using a branch circuit (BC) controller to control energy. The BC
controller can remove energy from one zone that doesn't need it,
and apply it to a different zone that does. For example, if an
indoor unit in one room is calling for cooling and an indoor unit
in another room is calling for heating, the BC controller can take
the heat removed from the room operating in cooling and use it to
warm the room in heating mode. The BC controller performs all the
work, bypassing the compressor unit and saving electricity.
Zoned HVAC Systems
VRF and smaller split systems
save energy, while providing a high degree of comfort, through
their zoning capabilities. Zones or rooms can be designed to exact
needs, taking into account occupancy, solar gain parameters, and,
in the case of VRF systems, diversity of usage.
Intelligent indoor units have
sensors to measure room air temperature at the return, or if the
design requires it, air temperature can be measured at a remote
thermostat. The ability to choose the measurement location allows
for better air temperature management, maintaining the set point
within 1 degree Fahrenheit (half of a degree Celsius). Some split
and VRF system indoor units feature an i-see™ sensor accessory,
which senses and compares air and floor temperatures, and then
adjusts vane direction as needed to optimize the comfort within the
space. Also, each indoor unit features linear expansion valves to
ensure the precise amount of refrigerant is delivered to the
zone.
Mitsubishi Electric Cooling &
Heating VRF and split systems with multiple indoor (air-handling)
evaporator units connected to an outdoor compressor unit can
deliver just the right amount of refrigerant to precisely meet each
zone's load. Indoor units can be controlled to operate only in
those occupied areas that need conditioning; indoor units in vacant
areas can be turned off. By conditioning only the occupied
areas, heating or cooling capacity is not wasted.
Diversity and
Zoning
HVAC systems are sized depending
on the cooling and heating peak loads of the building; the combined
capacity of the indoor units can match, exceed, or be lower than
the capacity of the connected outdoor unit. INVERTER-driven VRF
systems can be designed and sized on a zone-by-zone basis to adjust
for a building's solar gain and the changing seasons. And,
depending on the system selected, up to 50 indoor units can be
connected to each outdoor unit, producing a total applied capacity
of up to 150% of the outdoor unit's rated capacity.
Certain VRF systems feature
simultaneous cooling and heating. Also called heat recovery, these
systems enhance the capabilities of zoning technology considerably
by using a branch circuit (BC) controller to control energy. The BC
controller can remove energy from one zone that doesn't need it,
and apply it to a different zone that does. For example, if an
indoor unit in one room is calling for cooling and an indoor unit
in another room is calling for heating, the BC controller can take
the heat removed from the room operating in cooling and use it to
warm the room in heating mode. The BC controller performs all the
work, bypassing the compressor unit and saving electricity.
