Heat Pump
Unitherm 3 R32
13
CASE 3 : Connecting Sanitary Water Tank, Under-floor Coil and FCU
Outdoor
Indoor
Sanitary water tank
FCU1
FCU2
Under-floor coil
Shut-off valve
2-way valve (field supplied)
By-pass valve (field supplied)
Notes
(a)
The two-way valve is very important to prevent dew condensation on the floor and FCU while cooling mode
(b)
In this case, three-way valve should be installed and should be complied with installation of this manual;
(c) Anitary water tank should be equipped with internal electric heater to secure enough heat energy in the
very cold days.
(d)
When the FCU and the underfloor coil are used at the same time, performance of the underfloor coil is
satisfied firstly. When performance of the FCU is required, then “Floor config” should be set to “Without”.
