Air-to-water Heat Pump
11
CASE 2: Connecting
Sanitary
Water Tank and Under-floor Coil
Under-floor coil
NOTES:
(1) In this diagram, under-floor coil represents the user’s heating/cooling terminal. In actual
engineering, terminals are selected by the user.
(2) In this case, three-way valve should be installed and should be complied with installation of this
manual.
WARNING
The 3-way valve should select under floor loop when electric power is supplied to wire (ON)
and wire (N).
The 3-way valve should select water tank loop when electric power is supplied to wire (OFF)
and wire (N).
(ON): Live signal (Heating/Cooling system) from the main board to the 3-way valve.
(OFF): Live signal (Water tank loop) from the main board to the 3-way valve.
(N): Neutral signal from the main board to the 3-way valve.
6 Appearance
GRS-Cm18PdRe/NhA-M
