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The RVA 47.320 (B series) regulator makes possi-
ble cascade control of two 50 kW modules.
In addition to the cascade, it allows:
- the control of a network pump or of a heating
network pump,
- the control of domestic hot water production bt
the load pump (on THR 10-100 C models) or by
the selector valve (on THR 10-100 CS models).
Boiler and heating circuit control is carried out ac-
cording to atmospheric conditions, domestic hot wa-
ter production is controlled according to the
programmed temperature of the domestic hot water
tank and the time programme.
By connecting the RVA 47s equipping each
THR 10-100 boiler, it is possible to have four
THR 10-100 operate in a cascading mode for a 10
to 400 kW modulation.
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Q1 pump is a network pump.
It operates as soon as there is a zone circuit heating
request (request made via RVA 46 regulators).
The heating flow temperature is the highest temper-
ature setting of the all the zone circuits.
In that case, the control knob of the RVA 47’s room
temperature (item no. 1, fig. 19) becomes inactive.
The Q1 network pump stops operating as soon as
there is no more heating request in any of the zone
circuits.
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See section V - BASIC SETTING OF THE THR 10-
100.
La pompe Q1 fonctionne comme une pompe de
chauffage.
It operates as soon as the RVA 47 receives a re-
quest and the outdoor temperature is lower than the
Summer/Winter switching setting value (19 °C).
This request can be made either by:
- the RVA 47’s room temperature control knob
(item no. 1, fig. 19),
- the QAA 70 room sensor connected to the
RVA 47.
The Q1 stops operating when there is no heat re-
quest.
The control of the heating circuit flow temperature is
therefore carried out according to external condi-
tions with or without room temperature influence.
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