– 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.
▼
Fig.5-02
Drain Cock for water
Charge and Drain
M
M
TFI
M
TTW
TRV
TRV
Isolating
Ball Valves
Strainer (40 mesh / 0.4 mm)
Indirect Sanitary
Hot Water Cylinder
Zone 2
Under-floor Heating
(2-Way Valve Control)
Motorized 2-Way Valve is required if fan coil units are in cooling
operation.
In case of that the water circuit of 2nd pump is dead end, set
DN64 to "1". Pump 2 operation can be stopped during cooling .
Zone 1
Fan Coil Unit (Heating
or Cooling)
Temp.
Regulating
Valve
(Mechanical)
Temperature
Regulating
Valve
(Mechanical)
Hi-Pressure
By-Pass
Valve
6
Main components of Hydro Unit
■
Exploded view and description for Hydro Unit
▼
Fig.6-01
19 20 22 21 9 10 25 26
6
16
14
17
13
29
18
16
7
1
15
12
2
23
5
3
4
11
24
8
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
9 : Refrigerant gas connection
10 : Refrigerant liquid connection
11 : Air vent valve
12 : Overpressure preventive valve (0.25 MPaG (2.5 barG))
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 inlet connection (for Domestic Hot water)
20 : Water outlet connection (for Domestic Hot water)
21 : Water inlet connection (for Zone1)
22 : Water outlet connection (for Zone1)
23 : Three - way valve
24 : Mixing valve
25 : Water inlet connection (for Zone2)
26 : Water outlet connection (for Zone2)
27 : Temperature sensor (for Water outlet to Zone2 -TFI)
28 : Safety group, DHW
29 : Cable channel, Power cables
30 : Cable channel, Low voltage cables
28
27
30
13-EN
14-EN
Summary of Contents for HWT-1101F21MM3W-E
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