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Air cooled inverter water chiller
OPERATION
MANUAL
Operation Manual
42
EWAD TZ B 160-700
Air cooled inverter water chiller
D-EOMAC00909-16EN
When leaving water temperature is within the deadband (DB) error from the active setpoint, unit
capacity will not be changed.
If the leaving water temperature decreases below the setpoint, unit capacity is adjusted to keep it
stable. Further decrease of the controlled temperature to a Shut Down DT offset (SD) can cause
circuit shutdown and in the Shutdown area the whole unit is switched off. In particular, a
compressor will be shut down if it is required to unload below the Lt Ld Stg Dn % capacity.
Loading and unloading speeds are calculated by a proprietary PID algorithm. However, maximum
the rate of water 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
in multiple circuits units. This strategy optimizes the lifetime of compressors, inverters, capacitors and all the
others circuit components.
5.1.4 Alarm Settings
Factory defaults are set for standard cooling mode, therefore they may not be properly tuned when
working at different conditions. Depending on the application, the following alarm limits need to be
adjusted:
Low Press Hold
Low Press Unload
Evap Water Frz
Low Press Hold
Set the minimum refrigerant pressure of the unit. It is generally recommended to set to a value whose saturated
temperature is 8 to 10°C below the minimum active setpoint. This will allow a safe operation and a proper control
of compressor suction superheat.
Low Press Unload
Set lower than the hold threshold enough to allow a suction pressure recovery from fast transients without
unloading the compressor. A 20 kPa differential is generally appropriate for most applications.
Evap Water Frz
Stops the unit in case the leaving temperature falls below a given threshold. To allow a safe operation of the
chiller, this setting must be adequate to the minimum temperature allowed by the mixture water/glycol present in
the evaporator water circuit.
Thermostat Control ON
Thermostat Control OFF
Thermostat
Control
OFF
Capacity
load up
Capacity
Unload
AS
AS+SU
AS-SD
Evap Leaving Water Temperature
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Productinformatie
| Merk | Daikin |
| Model | EWAD495TZPLB2 |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11976 MB |
