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8.2.2 Mode set control
Outdoor
1
Coding
Assembly unit
1
Main unit
2
User interface
Balance tank (Field supply )
4
4.1
Automatic air purge valve
4.2
Drainage valve
5
P_o: Outside circulation pump (Field supply)
Expansion vessel (Field supply )
10
12
Filter (Accessory)
Space heating
Cooling or heating mode is set via the room thermostat, water temperature is set on the user interface.
1) When any "CL" of all the thermostats close, system will be set at cooling mode.
2) When any "HL" of all the thermostats close and all "CL" open, system will be set at heating mode.
The circulation pumps operation
1) When the system is in cooling mode, which means any "CL" of all the thermostats closes, SV2 keeps
OFF, P_o starts running.
2) When the system is in heating mode, which means one or more "HL" close and all "CL" open, SV2
keeps ON, P_o starts running.
2
RT1
14
17
15
14
12
16
16
Coding
14
16
19
20
22
FCU
1...n
RT
FHL
1... n
16
Indoor
10
4.1
5
4
4.2
Assembly unit
Shut-off valve (Field supply )
Drainage valv e (Field
supply)
Collector/distribut or
Bypass valve ( Field
supply)
SV2: 3 - way valve (Field supply）
Fan coil unit (Field supply
Low voltage room thermostat
Floor heating loop (Field
supply)
19
20
FCU1
FCU2
FCUn
19
FHL1
FHL2
FHLn
)
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