Main Components Of Hydro Unit - Toshiba HWT-60 Installation Manual

Hydro Unit
■ 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
Strainer (40 mesh / 0.4 mm)
Drain Cock for water
Charge and Drain
TTW
Indirect Sanitary
Hot Water Cylinder
13-EN
Temperature
Hi-Pressure
Regulating
By-Pass
Valve
Valve
(Mechanical)
TRV
Temperature
Regulating
Valve
(Mechanical)
TRV
Isolating
Valves
(Service)
Zone 1
Diverting
Fan Coil Unit (Heating
3-Way
or Cooling)
Valve for
Sanitary
Hot
Water
Cylinder
M
Motorized 2-Way Valve is
required if fan coil units are
M
in cooling operation.
Mixing 3-Way
Valve for Under
M
Floor Heating
External Pump for
Under Floor Heating
TFI
Zone 2
Direct Buffer tank for
Under-floor Heating
Under Floor Heating
(2-Way Valve Control)
– 7 –
6

Main components of Hydro Unit

■ Exploded view and description for Hydro Unit
▼Fig.6-01
1
13
3
2
15
4
6
7
10
20
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
Installation Manual
11
12
5
17
18
14
16
19
8
9
14-EN