Description Of Controller Functions; Optimizing - Samson TROVIS 5400 Series Mounting And Operating Instructions

4. Description of controller functions

The following function descriptions are intended to assist comprehension of the settings required
for operation.
The controller functions depend on the selected system code number, 1, 2, 3, or 4, depicted and
described in chapter 5.
The tables on pages 37 and 38 can be used to clarify the configuration levels (CO) and function
blocks (FB) described in the function descriptions.

4.1 Optimizing

The controller is capable of independently establishing the most appropriate times for switching
the heating system on and off in periodically used buildings. For this purpose, the function block
setting FB 1 = ON (linked with FB 2 = ON) is selected in configuration level CO1.
In contrast to reduced operation, the heating system is switched off at the latest at the beginning
of the period of non-usage.
A so-called reference room containing the necessary room temperature sensor and representing
the entire building is monitored with regard to an adjustable "sustaining temperature". If the
temperature falls below this value, the heating system will operate until the sustaining temperatu-
re (with approx. 0.5 °C added for differential gap) is exceeded, using the maximum permissible
flow temperature.
The controller selects switch-on time for commencing rated operation in such a way that the
"room setpoint value" (temperature adjustable at controller) is just reached at the beginning of
rated operation (tolerance for comfort 0.5 °C). This switch-on time may be up to 6 hours prior to
the time set for commencement of rated operation (this will for instance be the case when com-
missioning the function "optimizing", as the controller as yet has no information regarding the
characteristics of the building.
If no room sensor is connected, then heating system switch-on time can be postponed with re-
gard to the outdoor temperature in CO1 by FB 2 = ON and Selection = 1. The maximum permis-
sible pre-heating time is adjustable, a reference room is omitted.
With all system code numbers, drinking water requirements are not taken into consideration du-
ring the heating up period.
The controller selects heating system switch-off time in such a way that switching off the heating
before the end of rated operation has no noticeable effect on the desired room temperature
(comfort tolerance) towards the end of rated operation (for example sunlight can lead to an in-
crease in room temperature especially when flash adaptation is not used, and thus to premature
switching off). Switch-off time can be up to 2 hours before the time set for the end of the usage
period.
If no room sensor is connected, the controller reduces the flow temperature towards the end of
rated operation. If, at the beginning of reduced operation, the outdoor temperature exceeds
10 °C (default value: adjustable), then the heating system remains switched off. If the temperatu-
re falls below this limiting value during reduced operation, then the reduced return flow tempe-
rature is regulated.
If, in the course of one day, 2 or 3 rated operating times have been set, then a "reduced room
setpoint value" (temperature adjustable at controller) is monitored instead of the "sustaining
temperature".
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