Daikin EWAD TZ-B Operation Manual

Also see for EWAD TZ: Installation, operation and maintenance Installation, operation and maintenance manual

Contents

Daikin EWAD TZ-B Operation Manual Manual pdf 39 page image

Air and Water cooled inverter chillers and heat pumpEWAD TZ - EWAD TZ B - EWWD VZAir and Water cooled inverter chillersand heat pumpD-EOMZC00105-17ENOperation Manual39/84Double Setpoint, Setpoint Reset and Quiet Mode are not operational in Ice Mode.5.1.3.2 Thermostat Control SettingsThermostat control settings, allows to set up the response to temperature variations and the precision of thethermostat control. Default settings are valid for most applications, however site specific conditions may requireadjustments in order to have a smooth and precise temperature control or a quicker response of the unit.The control will start the first circuit if the controlled temperature is higher (Cool Mode) or lower (Heat Mode)than the active setpoint (AS) of at least a Start Up DT (SU) value. Once circuit capacity exceeds the Hi Ld StgUp % another circuit is switched on. When controlled temperature is within the deadband (DB) error from theactive setpoint (AS), unit capacity will not be changed.If the leaving water temperature decreases below (Cool Mode) or rises above (Heat Mode) the active setpoint(AS), unit capacity is adjusted to keep it stable. A further decreasing (Cool Mode) or increasing (Heat Mode)of the controlled temperature of the Shut Down DT offset (SD) can cause circuit shutdown.In the Shutdown area the whole unit is switched off. In particular, a compressor will be shut down if it is requiredto unload below the Lt Ld Stg Dn % capacity.Loading and unloading speeds are calculated by a proprietary PID algorithm. However, maximum the rate ofwater temperature decrease can be limited through the parameter Max Pulldn.Circuits are always started and stopped to guarantee the balancing of running hours and number or starts inmultiple circuits units. This strategy optimizes the lifetime of compressors, inverters, capacitors and all theothers circuit components.Thermostat Control ONThermostatControl OFFCapacity load upCapacity UnloadASAS+SUAS-SDThermostat Control OFFControlledTemperatureDBCOOL MODEThermostat Control ONThermostatControlOFFASAS+SDAS-SUThermostat Control OFFCapacityUnloadCapacity load upControlledTemperatureDBHEAT MODE