Daikin EKSR3PA, Инструкции по эксплуатации и монтажу

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5 x Operation
Operating and installation instructions
32
E EKSRDS1A
Control and pump unit for solar systems
4PW56033-1
The following information will assist with calculating the settings and will guarantee optimum heat yield with low power
consumption:
• Set the cut-in temperature difference "Delta T on" so the system remains operating after start-up under steady solar
radiation conditions and does not shut down immediately the solar panels cool down after removing heat. The lower the
selected value can be the longer operation times and therefore the greater the achievable heat yields. If the cut-in temper-
ature difference is set too low the solar panels will cool down as soon as the pumps are started enough to fall below the
cut-out temperature difference.
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The pumps will shut down immediately and less heat will be obtained at high power consumption.
• Set the cut-out temperature difference "Delta T off" so the available heat output at the cut-out point is higher than the
electrical power required to operate the pumps.
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Because the power consumption of the pumps is virtually independent of the area of the solar panels but the available
heat output depends directly on the number of solar panels, the parameter value is set higher with fewer solar panels
and lower with more solar panels.
• Set the cut-in delay for the tank circulation pump "Time PsE" so hot water is at the plate heat exchanger of the solar
connection kit EKSOLHWAV1 until the tank circulation pump starts.
• The maximum storage tank temperature "T
S
max" is set appropriately for the individual requirements. The higher the
parameter value the higher the available heat storage capacity and therefore the potential output of the solar system.
The cut-in protection temperature "T
K
zul" is preset at the factory to prevent noise and steam formation. The solar control system
only switches on the pumps if the solar panel temperature has exceeded the defined parameter value once by 2 K. The system
operates without forming steam in the solar panels. However, on a cloudless day this may cause the system to switch on again
only in the late afternoon, although the storage tank temperature allows additional heating.
•
To maximise the energy input set the "cut-in protection temperature parameter" to a value greater than 110 °C and
therefore deactivate the cut-in temperature protection function. The owner of the system must be informed of possible
audible bubbling noises and vapour pressure pulses during start-up in this case.
The system parameters at start-up must be set individually to the installed system situation and if necessary
optimised during operation. In general, the system operates with the factory settings.
CAUTION!
If storage tank temperatures are over 60 °C a thermal mixing valve must always be installed at the hot water
connection of the storage tank for scalding protection.