Installation guideInstallation guide
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3. DVM design process3. DVM design process
DVM is a variable multi air conditioner that modulates its performance by different conditions such asDVM is a variable multi air conditioner that modulates its performance by different conditions such as
design temperature, indoor and outdoor unit combination rates, heating operation rates, piping length,design temperature, indoor and outdoor unit combination rates, heating operation rates, piping length,
and level difference.and level difference.It is important to select the appropriate design condition to the load of each room.It is important to select the appropriate design condition to the load of each room.
••Design temperatureDesign temperature
••Calculate cooling and heating loadsCalculate cooling and heating loads
••Power supply, piping length and level differencePower supply, piping length and level difference
•• Consider design temperature conditions to select Consider design temperature conditions to select
larger indoor types than actual load.larger indoor types than actual load.
•• Determine outdoor units by the sum of the capacityDetermine outdoor units by the sum of the capacity
of preliminary selected indoor units: At this time,of preliminary selected indoor units: At this time,
decide how much combination ratio to permit.decide how much combination ratio to permit.
•• Calculate actual capacity ofCalculate actual capacity of
outdoor units consideringoutdoor units considering
design temperature, indoor anddesign temperature, indoor and
outdoor unit combination ratio,outdoor unit combination ratio,
piping length, level difference,piping length, level difference,
heating operation rates, etc.heating operation rates, etc.
•• Calculate actual capacity of each indoor Calculate actual capacity of each indoor
unit based on the calculated outdoorunit based on the calculated outdoor
capacity.capacity.
••If Indoor If Indoor units’ actual capacity is lower than the load,units’ actual capacity is lower than the load,
reselect ones with a larger capacity. Depending onreselect ones with a larger capacity. Depending on
designers’ own designers’ own discretion.discretion.
•• If there is no indoor unit with a larger capacity, add If there is no indoor unit with a larger capacity, add
another indoor unit.another indoor unit.
