Samson TROVIS 5431, Монтаж и эксплуатация

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5.5.6 Priority of drinking water heating system (CO2 F09)
This function can be selected for systems 4
and 5 and requires the flow sensor FS2.
The drinking water heating system which is
implemented in the primary circuit, can be
granted priority by selecting Co2 F09-1. You
are required to determine the priority
procedure by selecting option 1 or 2 as fol-
lows: Selecting option 1 means ‘adaptive pri-
ority’ (reverse control). The set point of the
heating circuit is reduced according to the
current requirements so that thedrinking
water heating system can reach its set point.
Selecting option 2 means ‘specific priority’
(set-back control). The set point of the heat-
ing circuit is reduced by a defined value. The
priority function becomes active only after
the time schedule has released the drinking
water heating system and the heating system
is in operation. Priority ends when the time
schedule for the drinking water heating
system ends.
Reverse control (CO2 F09 -1, option "1")
If the temperature at the flow sensor FS2 falls
below the charging set point (PA2) by more
than 5 K and for longer than the ‘Idle time’
(function parameter, CO2 F09), the
consumption of the heating circuit is reduced
by decreasing the set point. The set point of
the heating circuit is reduced in increments of
5 K to enable the heating up of drinking
water. This reduction may attain the value in
the parameter ‘Minimum flow temperature’.
If the flow temperature of the heating circuit
is below its set point when reverse control
commences, the set point is reduced by 5 K
to accelerate the heating up of drinking
water.
If the charging temperature at the flow sensor
FS2 is up to 5K below the charging set point,
the current set point of the heating circuit is
maintained. If the charging temperature at
the flow sensor FS2 exceeds its set point, the
heating circuit set point is increased.
Set-back control (CO2 F09 -1, option "2")
If the temperature at the flow sensor FS2 falls
below the charging set point (PA2) by more
than 5 K and for longer than the ‘Idle time’
(function parameter, CO2 F09), the heating
circuit is set to reduced operating mode for
20 minutes. This reduces the consumption of
the heating circuit.
EB 5431 EN
49
Functional descriptions