Principle Diagram With Direct Delivery; Plant Cooling/Heating Function Enabling From Ta - TESY MultiThermica User's And Installer's Manual

FUnCTIon SETTInG InDooR UnIT WITHoUT InTEGRA TED WA TER T AnK
INDOOR UNIT WITHOUT INTEGRATED WATER TANK
4�2�3 Principle diagram with direct delivery
A Plant
B
Indoor unit Indoor Unit Without Integrated Water Tank
C
outdoor unit
1� Plate exchanger
2�
PT6 probe
3� Expansion vessel
4�
3-bar safety valve
5�
Network water filter
6� Flexible connections
A
Water temperature control
Control setting on PT5 (system flow)
SRI: PT5
The minimum water content of the plant indicated in the installer manual of the unit being installed must be respected. If

necessary, provide for the use of a buffer tank on the plant return line.
PP1 primary circulation pump
The primary pump is set for Energy Saving operation.
p. 20
"PMS" : TIM (default)
Continuous on-call setting can be selected for this type of system.

Check the primary pump head with the pressure drop of the plant. If this is not sufficient, manifolds must be provided on

the delivery and return lines of secondary pumps.
4�2�4 Plant cooling/heating function enabling from TA
The connection and activation of an external consents (TA) is essential for the operation of the unit:
• TA from room thermostat
• TA from Modbus Supervisor
The two types of TA consents can co-exist and the unit will activate when it receives a call from at least one of the two .
TA from room thermostat or a generic potential-free contact contact
Function Logic:
The TA must be connected to digital input PI3:
• on the terminal board of the indoor unit
26
TA
10
13
8
9
7� Shut-off valves
8�
Plant drain cock
9�
Automatic plant filling assembly
10� Expansion vessel
11�
PP1 primary circulation pump
12� Electric heating element
13�
Buffer tank
14�
Flow switch (differential pressure switch)
15� Dirt separator
B
2 (PT5)
1
6
7 12
11
14
3
4
7 5 6
15
C