Siemens Synco 200 Basic Documentation page 67

Possibility 3: Changeover
at an adjustable
difference
Application examples
Siemens
Building Technologies
Maximum economy changeover (MECH),
To achieve changeover at an adjustable difference between 2 measured values,
you must assign one analog input each to MECH input 1(MECH 1) and MECH
input 2 (MECH 2).
Function with TYPE = ERC:
When controlled via the heating sequence:
When the set MECH difference (MECHSET) is exceeded, the output of the HR
equipment (HREC) will be inverted.
When controlled via the cooling sequence:
When the set MECH difference (MECHSET) is exceeded, the output of the HR
equipment (HREC) will no longer be inverted.
0 %
Examples of changeover at an adjustable difference:
Changeover at a temperature difference of:
•
Outside temperature minus room temperature ≥ 3 K
Changeover at a temperature difference of:
•
Outside temperature minus exhaust air temperature ≥2 K
Universal Controllers RLU2...
Aggregates
(cont'd)
X2
OUTS
CTLOOP 1
y1 y2
HREC
HR
X1
ROOM
67 / 174
CE1P3101en
29.08.2008