Radiant RK 100, Инструкция по эксплуатации

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INSTALLATION INSTRUCTIONS
RK 100 - RAD - ING - MAN.INST - 1311.1 - DIGITECH CS MIAH4
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2.7 System accessories
2.7.1 3-way valve kit
It’s possible to connect the boiler to a remote storage cylinder for the
domestic hot water production by installing a 3 – way valve kit.
The installation of a 3 - way valve kit (on the heating return) allows
the boiler to manage the heating circuit in an indipendent way and
assures the power supply of the serpentine according to the cylinder
preheat request.
The kit includes a remote cylinder DHW temperature sensor and a 3-
way valve power supply cable which is directly connected to the
boiler PCB.
2.7.2 Hydraulic compensator
In order to guarantee a regular boiler functioning by avoiding scarce
capacity’s problems (due to obstructed radiators or impurieties), the
installation of a hydraulic compensator is strictly necessary or, as
alternative, the installation of a heat exchanger able to separate the
hydraulic circuit.
The choice of a hydraulic compensator rather than another,
exclusively depends on the type of the system.
Hydraulic compensator – code 26205LA
The installation of a hydraulic compensator is recommended in case
of a new system or a boiler replacement where a pipes flushing is
possible. (fig. 1).
The compensator will create a low pressure loss zone so that
the primary circuit (of the boiler) will become independent from the
secondary circuit. Therefore the installation of the hydraulic
compensator allows a constant flow rate circuit and a variable flow
rate distribution circuit, typical conditions of the modern heating
systems.
A particular attention must be reserved, during the planning phase, to
the possible temperature variations that circuits can suffer due to the
mixing inducted into the hydraulic compensator. A secondary circuit
with a higher capacity than that circulating in the primary circuit
creates, through the hydraulic compensator, a heating flow
temperature which is lower than the primary circuit temperature.
Plate exchanger
In case of a standard boiler’s replacement in an old system with
impurities and in case of problems during the system flushing, the
installation of a heat exchanger is recommended to prevent boiler’s
obstructions that might compromise its functioning. The heat
exchanger, interface between the primary circuit which includes the
boiler and the secondary circuit, guarantees a real separation of
thermal carriers flows and the consequently boiler safeguard.
Unfortunately in this case, a real separation of flows provokes a real
output loss from the system.
co
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26
09
7LP
co
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2
620
5L
A
co
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65
-000
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Fig. 1