6
1.2.3 Space Heating Through Floor Heating Loops and Space Cooling Through Fan Coil Unit
Note: In space cooling mode, the 2-way valve on the floor heating branch circuit is closed to prevent cold water entering the
floor heating loops.
Master unit
Expansion tank
Water replenishment valve
Water discharge valve
Differential pressure
by-pass valve
Drain valve
Two-way valve
Three-way valve
FCU
Auxiliary electric heater
unit
unit
Y-type filter,
requiring≥ 16 mesh
Slave unit
Max 16 units
FCU
FCU
Floor
Heating
Loops
Floor
Heating
Loops
Floor
Heating
Loops
Two-way valves
Stop valve
Pressure gauge
Gate valve
Flexible joint
Y-shaped filter
Thermometer
Circulating pump
Check valve
Automatic discharge valve
Legend