Handleiding
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EWWQ090G ÷ EWWQ720L - R410a - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410a - Condenser less
EWHQ100G ÷ EWHQ400G - R410a - Heat pump scroll chillers
EWAQ- - R410a - Air-cooled scroll chillers
EWAQ-G - R410a - Air-cooled scroll chillers
EWYQ- - R410a - Air-cooled scroll heat pumps
Air and Water cooled scroll chillers & heat pump
Operation
Manual
Operation Manual
42
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00106-15EN
refrigerant circuits and it is started automatically only when required to guarantee the condensing
target.
When the unit is configured as Heat Pump with water inversion the controller inverts the
functioning of the pumps. This means that the pump managed for the primary water circuit in
cooling mode is managed, instead, for the secondary water circuit in heating mode and viceversa.
5.1.6.1 Pumps control for A/C units
In this case the UC only manages the pumps connected to the load water circuit. Lead pump is
started when the unit is set to Enabled and there are compressors available to run.
Depending on the HMI setting pumps are managed differently.
In case of twin pumps in case of flow loss, the UC will try to change over between the lead and the
standby pump to avoid flow loss alarms.
When the unit is disabled the pump is kept running for additional Recirculate Timer delay.
5.1.7 Power Conservation
The unit controller provides two different functions that allow to limit the chiller capacity.
1. Demand Limit: limits the maximum unit capacity.
2. Lwt Reset: applies an offset to the base water temperature setpoint.
Both function must be enabled through the menu Configure Unit 0.
5.1.7.1 Demand Limit
Demand limit function allows the unit to be limited to a specified maximum capacity. The capacity
limit is given through an external 4-20 mA signal. The table below reports the unit limitation based
on the 4-20mA signal:
Number of
compressors
Demand Limit Signal [mA]
Maximum unit capacity [%]
Maximum number of
compressors On
2
< 12 mA
100%
2
> 12 mA
50%
1
4
< 8 mA
100%
4
8 mA< < 12 mA
75%
3
12 mA< < 16 mA
50%
2
16 mA< < 20 mA
25%
1
In the Power Conservation 4.2.6 menu are reported the actual unit capacity and actual demand
limit.
Unit Capacity
Displays current unit capacity
Demand Limit
Displays active demand limit
5.1.7.2 LWT Reset
The LWT Reset function applies a variable offset to the base temperature setpoint selected
through the interface from the menu Temperature Setpoints 4.3.1.5.
If the unit works in Chiller mode the offset has a positive value, so the new setpoint will be greater
than the base setpoint.
If the unit works in Heat pump mode the offset has a negative value, so the new setpoint will be
lower than the base setpoint.
This offset can be calculated starting from:
Bekijk gratis de handleiding van Daikin EWAQ-G-SS, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Daikin |
| Model | EWAQ-G-SS |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11467 MB |
