Robur Direct Digital Controller, Инструкция по установке, использованию и программированию

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Direct Digital Controller
Direct Digital Controller fw 4.013 – Ed. 01/2013
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process is repeated when necessary and can lead to the progressive substitution of all the heat pumps or their
progressive re-inclusion.
This use of this advanced variant of the complement and substitution mode is subordinate to the satisfaction of
the following requirements:
•
Hydraulic configuration of the boilers in series with the heat pumps (see the “Applications manual”)
•
Installation of an additional temperature probe on the return manifold of the heat pump
These two requirements imply the use of the RB200 device, which is able to manage the temperature
probes of the effective delivery and return manifolds in the serial hydraulic configuration, and the
additional probe on the return manifold of only the heat pumps.
•
Correct setting of some additional parameters, concerning an auxiliary regulator which manages the
substitution and progressive re-inclusion of the heat pumps
These parameters are found in the hot service regulation parameters page of the base plant part (see
4.3.1 HEATING SERVICE).
Hydraulic configuration of the auxiliary boilers in parallel or in series with the heat pumps
Whatever the auxiliary boiler operating mode, it is possible to use the hydraulic configuration in parallel or in
series.
In the parallel configuration, the return pipes from the auxiliary boilers are connected directly to the plant return
manifold, like those in the heat pumps; similarly, all the delivery pipes are connected to the plant delivery
manifold. In this case, the carry out the regulation, the DDC may use:
•
If the auxiliary boilers are AY modules (Robur), the average temperature read by the machine probes,
or dedicated manifold probes, managed by the RB200.
•
If the auxiliary boilers are third party, only dedicated manifold probes, managed by the RB200.
In the serial configuration, the return pipes from the auxiliary boilers are connected to the delivery manifold of
the heat pumps and the delivery pipes to the plant delivery manifold; only the return pipes from the heat
pumps are connected to the plant return manifold. This configuration is advantageous when the plant, at high
thermal load, requires a higher delivery temperature than the maximum permitted by the heat pumps [60 or 65
°C (140 or 149° F) according to the models] and develops a higher Delta T than that of the heat pumps [10 °C
(18°F)]. In this case, to carry out the regulation, the DDC must always use dedicated manifold probes,
managed by the RB200, which may be positioned on the effective plant delivery and return manifolds.
For more information on this subject, refer to the "Applications Manual” (D-LBR630).
4.3 DESCRIPTION OF THE REGULATION WATER TEMPERATURE ALGORITHM AND
OF THE RELATIVE PARAMETERS
4.3.1 HEATING SERVICE
Objective of the regulation
The Digital Control Panel regulates the water temperature with the objective of maintaining it within a band
centred on the set point. The range of this period is defined by the relevant “Water differential” parameter, as
indicated in Figure 15. The default value of the parameter is 2 °C (3,6 °F) [i.e. ± 1 °C (±1,8° F) with respect to
the set point value]; for normal applications it is recommended to use this value.
NOTE
NOTE