Change In Lag/Lead Sequence (Anl 4 To 7); Outdoor Temperature-Dependent Change (Anl 5 And 7); Capacity-Dependent Change (Anl 5 And 7) - Samson TROVIS 5474 Mounting And Operating Instructions

Boiler functions
Parameter
Lag delay

Change in lag/lead sequence (Anl 4 to 7)

5.3
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
1 2
switch is set to
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
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
Automatic change in lag/lead sequence
Condition for change in lag/lead sequence
Parameter
Outdoor temperature limit for lag/lead
sequence change

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
Automatic change in lag/lead sequence
36
EB 5474 EN
and with the configuration Co5 -> Fb20 = OFF.
parameter:
A
WE Parameter level / Range of values
10 min PA5 / 0 to 90 min
WE Configuration
ON Co5 -> Fb09 = ON
ON Co5 -> Fb10 = OFF, select: 1
WE Parameter level / Range of values
15 °C PA5 / –40 to 50 °C
WE Configuration
ON Co5 -> Fb09 = ON