Features SiUS30-6046 General Information1.3 Energy savingHeat recoveryIn mainly cooling, partly heating mode, the system recyclesheat exhausted from the cooling operation to use for heating.In mainly heating, partly cooling mode, the system uses cooledpost-heating operation refrigerant for cooling. Efficiencyimproves the more simultaneous operation is performed.Notes: • Operation modes (A) and (E) are applicable when the outside temperature is 95˚F and 32˚F respectively; The other modes are applicable under typical outside conditions.• Above system configurations are for illustration purposes only.Heat rejectedto loopHeat rejectedto loopSimultaneous heating and cooling operationwithin the refrigerant system.Heat recovery operation is also available betweensystems connected to the same water loop, with systemsexchanging heat via water. This increases energyefficiency.Heat recovery operation betweenthe VRV-WII units.Cooling tower (Closed type), boilercoolingcoolingcoolingcoolingcoolingcoolingThe first stage: Between indoor units The second stage: Between VRV-WII unitsHeat absorptionfrom loopHeat absorptionfrom loopABCDEHeat radiation operation(all cooling operation)Heat radiation tendencyheat recovery operation(mainly cooling,part heating operation)Heat recovery operation(cooling and heating operation)Heat absorption tendencyheat recovery operation(mainly heating,part cooling operation)Heat absorption operation(all heating operation)Heat rejectedto loopHeat absorptionHeatrejected cooling coolingcoolingcoolingcooling heatingcoolingcoolingheating heatingcoolingcoolingheating heatingheatingcoolingheating heatingheatingheatingheatingheatingheatingheatingheatingheatingDaikin now offers 2-stage heat recovery operation.The first stage of heat recovery operation is within the refrigerant system. By controlling the BS unitthat switches cooling and heating, simultaneous cooling and heating operation is made possible,with heat recovery performed between indoor units.The second stage of heat recovery operation is within thewater loop, where heat recovery is performed betweenthe VRV-WII units.This 2-stage heat recovery operation substantiallyimproves energy efficiency and makes the system theideal solution to the requirements of modern officebuildings, where some areas may require cooling even inwinter, depending on the amount of sunshine receivedand the number of people in the room.Stage 1 Stage 2VRV-WIIVRV-WIIVRV-WIIVRV-WIIVRV-WIIVRV-WIIVRV-WIIVRV-WIIVRV-WIIHeat transfer
