Daikin EWAT290B-SRA1 [14/62] Options options

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OPTIONS

Thanks to the saving on pumping cost, the payback time for the Inverter Kit is approximately one year.

High ambient kit (opt. code 142A) - Opt. incompatibility 99-42-161.

The high ambient kit allows to increase the maximum operating ambient temeperature. Check the unit operating

envelope for more information.

Variable Primary Flow (opt. code 143)

By selecting opt. 143 the chiller can manage the Variable Primary water flow according to the differential pressure

measured in a specific point of the plant, selected by the plant designer. The differential pressure transducer, is

available as option from the factory (opt. code 144). Once installed, the differential pressure transducer must be

connected to the unit. As an alternative the unit controller can receive directly the differential pressure value

from an external BMS communicating with the standards communications protocols (eg. MODBUS).

A bypass line (field supply) needs to be installed which guarantees that at all times the minimum water flow of

the chiller is supplied (refer to the “Operating limit” chapter for indication on minimum water flow). The bypass

valve will be an ON/OFF normally closed valve controlled by the chiller. In case the minimum water flow allowed

is not reached, the chiller will open the bypass line restoring the water flow above the minimum value.

In case of multiple units installations in a primary only plant, to control the pump speed iCM is required.

Master/Slave function does not support primary only chilled water systems with variable flow operation.

Hydronic options summarizing table