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Hydro Unit
5
Example of Hydro Unit installation
■
Example of installation for cooling and heating
When both cooling and heating modes are required a 2-way valve must be installed to isolate the radiator or under-
floor heating circuit.
▼Fig.5-01
Strainer (40 mesh / 0.4 mm)
Drain Cock for water
Charge and Drain
TTW
Indirect Sanitary
Hot Water Cylinder
Alternative to Radiators
Under-floor Heating
(Heating Only)
[2-Way Valve Control]
11-EN
Fan Coil Units
(Cooling or Heating)
Isolating
Ball
Valves
Diverting 3-Way
Valve for
Sanitary Hot
Water Cylinder
M
Radiators (Heating Only)
[2-Way Valve Control]
2-Way
M
Valve
Use the 2-
way valve to
isolate the
heating
circuit when
in cooling
mode.
Use it when do not
2-Way
M
operate cooling.
Valve
■
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
Strainer (40 mesh / 0.4 mm)
Drain Cock for water
Charge and Drain
TTW
Indirect Sanitary
Hot Water Cylinder
– 6 –
Temperature
Hi-Pressure
Regulating
By-Pass
Valve
Valve
(Mechanical)
TRV
Temp.
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)
Installation Manual
12-EN
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