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Parameter
WE
Parameter level / Range of values
Lag delay
10 min PA5 / 0 to 90 min
5.3
Change in lag/lead sequence
(Anl 4 to 7)
The lag/lead sequence can be changed depending on the outdoor temperature, operating
hours or capacity. The change in lag/lead sequence is only effective when the mode selector
switch is set to
and with the configuration Co5 -> Fb20 = OFF.
Note!
A change in lag/lead always takes place when the controller detects a fault in the lead boiler
regardless of the configuration.
5.3.1 Outdoor temperature-dependent change
(Anl 5 and 7)
The outdoor temperature-dependent change in lag/lead sequence is only appropriate when
boilers with varying capacity are used.
The lead boiler is determined by comparing the mean outdoor temperature over three days with
the
Reverse sequence limit t
A
parameter:
4
Outdoor temperature >
Outdoor temperature limit for lag/lead sequence change: Lead
boiler is the boiler with the smallest unit capacity
4
Outdoor temperature <
Outdoor temperature limit for lag/lead sequence change: Lead
boiler is the boiler with the largest unit capacity
Functions
WE
Configuration
Automatic change in lag/lead sequence
ON
Co5 -> Fb09 = ON
Condition for change in lag/lead sequence
ON
Co5 -> Fb10 = OFF,
select:
1
Parameter
WE
Parameter level / Range of values
Outdoor temperature limit for lag/lead
sequence change
15 °C
PA5 / –40 to 50 °C
5.3.2 Capacity-dependent change
(Anl 5 and 7)
The lead boiler is the boiler which had the lowest average capacity over the past three days.
Functions
WE
Configuration
Automatic change in lag/lead sequence
ON
Co5 -> Fb09 = ON
36
EB 5474 EN
Boiler functions
1 2
Содержание TROVIS 5474
Страница 79: ...System Anl 3 System Anl 4 EB 5474 EN 79 Electrical connection...
Страница 80: ...System Anl 5 System Anl 6 80 EB 5474 EN Electrical connection...
Страница 127: ...EB 5474 EN 127 Index Key number 1732...
Страница 129: ...EB 5474 EN 129...
Страница 130: ...130 EB 5474 EN...