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Air cooled inverter water chiller
OPERATION
MANUAL
Operation Manual
52
EWAD TZ B 160-700
Air cooled inverter water chiller
D-EOMAC00909-16EN
5.3.1.2 Low Evaporating Pressure
When the circuit is running and the evaporating pressure drops below the safety limits (see section
4.11.1.2) the circuit control logic reacts at two different levels in order to recover the normal running
conditions.
If the evaporating pressure drops below the Low Pressure Hold limit, compressor is inhibited to
increase its running capacity. This condition is indicated on the controller display in the circuit
status as “Run: Evap Press Low”. The status is automatically cleared when the evaporating
pressure rise above the Low Pressure Hold limit by 14 kPa.
If the evaporating pressure drops below the Low Pressure Unld limit, compressor is unloaded in
order to recover the normal operating conditions. This condition is indicated on the controller
display in the circuit status as “Run: Evap Press Low”. The status is automatically cleared when the
evaporating pressure rise above the Low Pressure Hold limit by 14 kPa.
See section 6.1.7.1 to troubleshoot this problem.
5.3.1.3 High Condensing Pressure
When the circuit is running and the condensing pressure rises above the safety limits the circuit
control logic reacts at two different levels in order to recover the normal running conditions.
The two different levels, called High Pressure Hold and High Pressure Unload limits, are calculated
by the controller from the maximum condenser pressure allowed by the compressor envelope. This
value depends from evaporating pressure as reported in the figure below.
If the condensing pressure rises above the High Pressure Hold limit, compressor is inhibited to
increase its running capacity. This condition is indicated on the controller display in the circuit
status as “Run: Cond Press High”. The limit is calculated in terms of saturated condensing
temperature; the status is automatically cleared when the saturated condensing temperature rises
above the High Pressure Hold limit by 5.6°C.
If the condensing pressure rises above the High Pressure Unload limit, compressor is unloaded in
order to recover the normal operating conditions. This condition is indicated on the controller
display in the circuit status as “Run: Cond Press High”. The status is automatically cleared when
the saturated condensing temperature rises above the High Pressure Hold limit by 5.6°C.
See section 6.1.7.2 to troubleshoot this problem.
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Productinformatie
| Merk | Daikin |
| Model | EWAD620TZPLB |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11976 MB |
