14
ATTENTION ! Leaving the field unchanged or entering wrong value does not affect the operation of the controller and the system (the controller reads the actual flow rate
from the electronic flow meter).
Measurement: Rotameter
– cooperation with
a mechanical flow meter (rotameter).
The controller works with declared values (calculating power and energy outputs).
ATTENTION ! The bottom of the rotameter float indicates the actual flow rate value.
Nominal
flow rate
– entry to the nominal flow rate option results in switching P collector pump on with maximum efficiency - this value results from the number of solar
collector employed. Enter the calculated flow value resulting from the number of collectors in the system in the edition field and set the required flow in option
Pump
collector
column
Max
(example: rotational speed of the pump set to 3500 rpm – the obtained flow rate is 6 l/min) –
6 l/min
is entered into the field.
Minimum flow rate
– switching into the minimum flow rate option results in switching P collector pumps on with minimum efficiency and reducing flow.
– entry to the minimum flow option results in switching P collector pump on with minimum efficiency – the value results from the number of solar collectors used. Set the
value obtained by changing the pump speed in the edition field in option
Pump collector
column
Min
(example: rotational speed of the pump set to 1000 rpm – the
obtained flow rate is 2 l/min) – the value of
2 l/min
is entered into the field.
The flow rate values set as above determine the linear characteristic of flow used for computing power output of collectors at variable speed of P collector pump (Fig. 22).
Fig. 22. Graphical representation of flow settings.
ATTENTION ! If after entering the minimum flow rate option, there is no flow shown by rotameter float, it is recommended to increase the speed of the pump.
Nominal and minimum flow rate settings are only relevant when P collector pump adjustment is switched on. When this adjustment option is switched off it is only the
nominal flow rate to be regulated.
Leaving the field unchanged or entering wrong value may cause incorrect calculating of the power and thermal energy coming from solar collectors, but it does not
affect the operation of the controller and the system.
Measurement: Electr-OTHER
– integration with
any electronic flow meter
.
The controller reads the number of pulses declared by the user via the
Weight
parameter and converts
into the actual flow rate (l/min).
“Nominal” flow rate
– entry to the nominal flow rate option results in switching P collector pump on with maximum efficiency. Enter the flow value that results from the
number of collectors in the system into the edition field. Next, set the required flow rate value in such a way that the
“Current”
value corresponds to the calculated value
entered before. The required flow can be obtained by changing the rotational speed in option
Collector pump
.
ATTENTION!!! Leaving the field unchanged or entering wrong value does not affect the operation of the controller and the system (the controller reads the actual flow
rate from the electronic flow meter – on the basis of entered “pulse weight”).
Selecting the option Measurement: Electr-OTHER sets the same values for the second flow rate meter connected to the FLOW2 terminal.
5.7
Collector pump
The controller has the ability to control rotational speeds of different circulation pumps controlled by PWM signal. For proper operation of the system in the controller, a proper type of
pump installed in the ZPS pump control unit is to be set as follows:
Press the following combinations of keys: starting point – MAIN SCREEN: entering the
MENU
(enter password), moving to the option
Parameters settings
, entering the
menu
Parameter settings
, moving to the option
Collector pump
, entering the option
Collector pump
, choosing the parameter to be changed
or
, editing
, changing the values
or
, acceptance (continuous tone)
.
Minimum value –
make the speed conditional on the required minimum and actual flow rate resulting from the type and number of solar collectors (see 5.6)
Maximum value –
make the speed conditional on the required and actual flow rate resulting from the type and number of solar collectors (see 5.6)
Return to the main screen
.
5.8 Default settings
There are optimal factory settings pre-programmed in the controller for correct controller operation (List of factory settings values – see Table 3).
In order to restore the controller to factory settings:
Press the following key combination: start – MAIN SCREEN: enter the MENU with
(enter password), get to the option named Parameter settings with
, enter the
Parameter
settings
menu with
, get to the option named
Default
with
, enter the option named
Default
with
, restore to default settings and return with
, return to the main screen with
.
6.
Controller settings
6.1
Date and time
This option makes it possible to set current date and time. In order to change date or time:
Press the following key combination: starting point - MAIN SCREEN: enter the
MENU
with
, get to the option named
Controller settings
with
, enter the
Controller
settings
menu with
, get to the option named
Date and time
with
, choose appropriate parameters with
, change values with
or
, accept values with
, leave
the option named
Date and time
with
or use the
key to run through all the parameters, return to the main screen with
.
6.2 Display
Pump efficiency
Minimum
Nominal
Flow [l/min]
