587 Sensors used Legend Td : discharge (supply) air temperature Ts : suction (return) air temperature Tf : fresh air temperature Tr : room air temperature R2T/R3T: Refrigerant (liquid/gas line) temperature T Td s Tf Tr + R2T/R3T /R4T /R1T Control type benefits Sensor Used Controller Z’ control – control of supply air temperature J Cost efficient and simple solution, no additional DDC controller required J You can combine VRV indoor units and AHUs in one system or connect several AHUs to 1 outdoor unit J Ideal for pre-conditioning of fresh air via Td temperature control J Less accurate room temperature control compared to X/W/Z control R4T Daikin supplied) Daikin controller (set point can be set via field setting) Z control – return air temperature control J Cost efficient and simple solution, no additional DDC controller required J You can combine VRV indoor units and AHUs in one system or connect several AHUs to 1 outdoor unit J Ideal for AHU’s that operate at 100% recirculation like indoor units or if no particular supply temperature required J No supply temperature control R1T (Daikin supplied) Daikin controller (set point can be set via remocon or via C1C2) Exhaust Air Fresh Air Supply Air Return Air
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