20
8.3.2. GENERAL CONNECTION DIAGRAM FOR HEATING ONLY OPERATION WITH
MIXING VALVE
S4
S5
PR
VM
IR
PI
V
V
Key:
PI
System pump
VM
Mixing valve
PR
Bypass pump
S4
Heating system delivery temperature probe
IR
Heating system
S5
Heating system return temperature probe
V
Non return valve
8.3.3. GENERAL CONNECTION DIAGRAM FOR HEATING ONLY OPERATION WITH
OPEN
EXPANSION
TANK/CLOSED EXPANSION TANK
Key:
PI
System pump
V
Non return valve
PR
Bypass pump
S4
Heating system delivery temperature probe
IR
Heating system
S5
Heating system return temperature probe
SP
Plate heat exchanger