Samson TROVIS 5474, Монтаж и эксплуатация

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responding flow rate to the plant until the valve is completely opened and the boiler pump deliv-
ers the maximum flow rate in the plant.
Parameter WE Parameter level / Range of values
Minimum return flow temperature 50 °C PA1, PA2* / 20 to 120 °C
* Only in systems Anl 4 to 7
Depending on the configuration, the return flow boost can be controlled with a continuous
signal, on/off signal or three-point stepping signal (–> section 8.11).
5.4.1 Common return flow boost
In systems with two boilers (systems Anl 4, 5, 6 and 7), a common return flow boost can be im-
plemented. This is done by using the return flow control circuit of the first boiler K1, depending
on whether the boiler is in operation.
Function
WE Configuration
Common return flow boost OFF Co5 -> Fb12 = ON
5.5 Parallel operation (Anl 7)
This function leads to both boilers working constantly in parallel (no lag/lead sequence
control).
The boilers start operating one after the other, taking into account the programmed times:
Mini-
mum deactivation time for boiler K1, 2 and Lag delay as well as taking into account Tempera-
ture t
A
for releasing sequence
Function WE Configuration
Parallel operation of boilers OFF Co5 -> Fb19 = ON
Parameters
WE Parameter level / Range of values
Minimum deactivation time f. boiler K1, 2 0 min PA1, 2 / 0 to 90 min
Lag delay 10 min PA5 / 0 to 90 min
Temperature t
A
for releasing sequence 12 °C PA5 / –40 to 50 °C
5.6 Operating hours counter
This function allows the performed operating hours of boilers K1, 2 to be shown in the Inf1, 2
levels. The control is not affected by the counted operating hours. If the operating hours should
be selected to start at a certain initial value, this can be programmed separately.
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EB 5474 EN
Boiler functions