Toshiba HWS-802XWHM3-E Engineering Data page 71

7. HYDRO UNIT INSTALLATION MANUAL
Example of 2-Zone Temperature Control and Hot Water Supply
System
The following shows an example of the 2-zone temperature control.
A buffer tank and a water pump are required for the 2-zone temperature control.
▼ Fig. 5-02
Drain Cock for water
Charge and Drain
Indirect Sanitary Hot
Water Cylinder
7-EN
Isolating
Valves
(Service)
Strainer (40 mesh / 0.4 mm)
TTW
Hi-Pressure
Temperature
By-Pass
Regulating
Valve
Valve
(Mechanical)
Temp.
Regulating
Valve
(Mechanical)
Diverting
3-Way
Valve for
Sanitary
Hot
Water
Cylinder
M
Motorized 2-Way Valve
is required if fan coil
M
units are in cooling
operation.
Mixing 3-Way
Valve for Under
M
Floor Heating
TFI
Direct Buffer tank for
Under Floor Heating
– 69 –
Engineering Data Book
TRV
TRV
Zone 1
Fan Coil Unit (Heating
or Cooling)
External Pump for
Under Floor Heating
Zone 2
Under-floor Heating
(2-Way Valve Control)