Daikin EKSR3PA, Operating And Installation Instructions

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5 x Operation
E EKSRDS1A
Control and pump unit for solar systems
4PW56033-1
Operating and installation instructions
21
5 Operation
5.1 Operating and display components
5.2 Operation of control systems
5.2.1 Pump operation
Criteria for switching on:
– Pump operation depends on the continuously measured temperature difference between the solar panel and the storage tank
temperature and a comparison with the set value of the parameter "Delta T on".
– The solar panel circulation pump P
S
switches on when the temperature difference (=T
K
– T
s
) exceeds the value set in the
parameter "Delta T on" (e.g. storage tank temperature equals 40 °C and "Delta T on" is equal to 15 K; solar panel temper-
ature >55 °C).
Fig. 5-1 Operating and display elements of the EKSR3PA control system
1 Main switch with indicator light
2 Display of temperature and parameters (energy-
saving function: display lighting switches off
automatically 10 min after the last button press)
3 Indicator for solar panel display
4 Indicator for solar feed temperature and flow
rate display
(EKSFLP12A)
5 Indicator for storage tank temperature display
6 Indicator for solar return temperature display
7 Operating condition for BSK-contact (solar priority)
- "lights up" when contact is closed (signal for air-
water heat pump that solar heat is available)
8 Operating status indicator for P
S
solar panel
circulation pump (lights when pump is operating)
9 Push arrow key up to switch the temperature or
parameter display in the direction of the arrow or
to increase the parameter setting
10 Push arrow key down to switch the temperature
or parameter display in the direction of the arrow
or to reduce parameter settings
11 Info button to open the information level
(displays of measurement values, maximum
values and calculated values) and OK pushbutton
to confirm and save settings in the settings menu
1
2
3
4
5 7
8
6
9
10
11
Because of continual improvements for optimum use of the E EKSRDS1A control and pump unit, the
solar control system is fitted with an update function. Therefore, some functions described in this chapter are
applicable to specific software versions only. These functions are indicated separately by symbols.
Software updates to the solar control system must be done by DAIKIN service technicians only.
The DAIKIN solar system is operated fully automatically throughout the year. The speed of the pump drive is
controlled by the solar control system when the FlowSensor EKSFLP12A is connected. The operating and
display components are shown in Fig 5-1.
The power switch completely disconnects the solar control system from the mains voltage. Switching on the
power switch requires greater pressure on the button than pressing the operating buttons.