Gree GRS-CQ6.0Pd/Na-K Service Manual page 103

AIR-TO-WATER HEAT PUMP
(1) : Normal Open type. When electric power is NOT supplied, the valve is open. (When electric
power is supplied, the valve is closed.)
(2) : Normal Closed type. When electric power is NOT supplied, the valve is closed. (When electric
power is supplied, the valve is open.)
How to Wire 2-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.
OFF
NC
• Normal Open type should be connected to wire (NO) and wire (N)for valve closing in cooling mode.
• Normal Closed type should be connected to wire (NC) and wire (N)for valve closing in cooling mod
(NO) : Line signal (for Normal Open type) from PCB to 2way valve
(NC) : Line signal (for Normal Closed type) from PCB to 2way valve
(N) : Neutral signal from PCB to 2way valve
2.3.8 3-Way Valve
3way valve is required to operate sanitary water tank. Role of 3way valve is flow
switching between under floor heating loop and water tank heating loop.
General Information
Type
SPDT
3-wire 230V 50Hz ～AC
(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 3Way 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.
1 2
3
N
ON
N
NO
2 way value 1
Power
Selecting "Flow A" between
"Flow A" and "Flow B"
Selecting "Flow B" between
"Flow B" and "Flow A"
4 5
ON
OFF
N
NO N
NC
2 way value 2
Operating Mode
INSTALLATION
6
Supported
Yes
Yes
98