Toshiba HWT-601XWHT6W-E - Main Components of Hydro Unit

Hydro Unit
Installation Manual
– 7 –
■ 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.
If the fan coil or radiator has a temperature regulating valve, install a bypass circuit to ensure the
minimum flow rate.
▼Fig.5-02
M
M
M
Hi-Pressure
By-Pass
Valve
Temperature
Regulating
Valve
(Mechanical)
Temperature
Regulating
Valve
(Mechanical)
Zone 1
Fan Coil Unit (Heating
or Cooling)
Zone 2
Under-floor Heating
(2-Way Valve Control)
Strainer (40 mesh / 0.4 mm)
Drain Cock for water
Charge and Drain
Indirect Sanitary
Hot Water Cylinder
Direct Buffer tank for
Under Floor Heating
External Pump for
Under Floor Heating
Mixing 3-Way
Valve for Under
Floor Heating
Motorized 2-Way Valve is
required if fan coil units are
in cooling operation.
TRV
TTW
TFI
TRV
Diverting
3-Way
Valve for
Sanitary
Hot
Water
Cylinder
Isolating
Valves
(Service)
6 Main components of Hydro Unit
■ Exploded view and description for Hydro Unit
▼Fig.6-01
1
2
3
4
6
7
10
13
15
20
5
8
9
19
16
18
11
12
17
14
1 : Expansion vessel
2 : Temperature sensor (for Heat pump outlet -TWO)
3 : Pressure sensor
4 : Heat exchanger
5 : Flow sensor
6 : Temperature sensor (for refrigerant -TC)
7 : Temperature sensor (for water inlet -TWI)
8 : Drain nipple
9 : Water inlet connection
10 : Refrigerant liquid connection
11 : Air relief valve
12 : Overpressure preventive valve (0.43 MPa (4.3 bar))
13 : Thermal protector (auto)
14 : Temperature sensor (for water outlet THO)
15 : Thermal protector (Single operation)
16 : Water pump
17 : Backup heater (3 kW, 3 kW x 2, 3 kW x 3)
18 : Manometer
19 : Water outlet connection
20 : Refrigerant gas connection
13-EN
14-EN