– 6 –
Hydro Unit
Installation Manual
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
TTW
M
M
M
Fan Coil Units
(Cooling or Heating)
Isolating
Ball
Valves
Strainer (40 mesh / 0.4 mm)
Diverting 3-Way
Valve for
Sanitary Hot
Water Cylinder
Radiators (Heating Only)
[2-Way Valve Control]
2-Way
Valve
2-Way
Valve
Alternative to Radiators
Under-floor Heating
(Heating Only)
[2-Way Valve Control]
Indirect Sanitary
Hot Water Cylinder
Drain Cock for water
Charge and Drain
Use the 2-
way valve to
isolate the
heating
circuit when
in cooling
mode.
Use it when do not
operate cooling.
■
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
M
M
M
TTW
TFI
TRV
TRV
Temp.
Regulating
Valve
(Mechanical)
Isolating
Valves
(Service)
Strainer (40 mesh / 0.4 mm)
Diverting
3-Way
Valve for
Sanitary
Hot
Water
Cylinder
Drain Cock for water
Charge and Drain
Zone 1
Fan Coil Unit (Heating
or Cooling)
Temperature
Regulating
Valve
(Mechanical)
Hi-Pressure
By-Pass
Valve
Indirect Sanitary
Hot Water Cylinder
Mixing 3-Way
Valve for Under
Floor Heating
External Pump for
Under Floor Heating
Motorized 2-Way Valve is
required if fan coil units are
in cooling operation.
Direct Buffer tank for
Under Floor Heating
Zone 2
Under-floor Heating
(2-Way Valve Control)
11-EN
12-EN
Summary of Contents for HWT-1101XWHM3W-E
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