14 3-Way Valve - Gree GRS-CQ16Pd/NaB-K Owner's Manual

WARING!
① Normal Open type should be connected to wire (NO) and wire (N)for valve closing in cooling
mode.
② Normal Closed type should be connected to wire (NC) and wire (N)for valve closing in cooling
mode.
(NO) : Line signal (for Normal Open type) from PCB to 2-way valve
(NC) : Line signal (for Normal Closed type) from PCB to 2-way valve
(N) : Neutral signal from PCB to 2-way valve
The 2-way value 2 is reserved without any control program. At the field installation, it should be
wired at the terminal board of the 2-way valve 1.

14 3-Way Valve

3-way valve is required to operate sanitary water tank. Role of 3-way valve is flow switching
between under floor heating loop and water tank heating loop.
General Information
Type
SPDT
230V 50Hz ~AC
3-wire
(1) SPDT = Single Pole Double Throw. Three wires consist of Live1 (for selecting (for selecting
Flow B), and Neutral (for common).
(2) Flow A means 'water flow from the indoor unit to under floor water circuit.'
(3) Flow B means 'water flow from the indoor unit to sanitary water tank.'
How to Wire 3-Way Valve:
Follow below procedures Step 1 ~ Step 2.
Step 1. Uncover front cover of the indoor unit and open the control box.
Step 2. Find terminal block and connect wire as below.
WARING!
① 3-way valve should select water tank loop when electric power is supplied to wire (ON) and wire
(N).
② 3-way valve should select under floor loop when electric power is supplied to wire (OFF) and
wire (N).
(ON) : Line signal (Water tank heating) from PCB to 3-way valve
(OFF) : Line signal (Under floor heating) from PCB to 3-way valve
(N) : Neutral signal from PCB to 3-way valve
1 2
OFF ON
NO
NC
2 way value 1
Power
Selecting "Flow A" between "Flow A" and "Flow B"
Selecting "Flow B" between "Flow B" and "Flow A"
OFF
3 4 5 6
ON N
N OFF
N NC NO N
2 way value 2
Operating Mode
7 8
9
ON N
3 way value 1
22
Air-to-water Heat Pump
Supported
Yes
Yes