Gree GRS-CQ8.0Pd/NhG3-E User Manual

Air-to-water Heat Pump
26
MONOBLOC
TYPE
10. 2-Way Valve
The role of 2-way valve 1 is to control the water ow into the underoor loop. When “Floor Cong” is set to “With”
for either cooling or heating operation, it will keep open. When “Floor Cong” is set to “ Without”, it will keep closed.
General Information
Type Power Operating Mode Supported
NO 2-wire 230V 50Hz ~AC
Closing water ow Yes
Opening water ow Yes
NC 2-wire 230V 50Hz ~AC
Closing water ow Yes
Opening water ow Yes
(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.)
(3) How to Wire 2-Way Valve:
Follow steps below to wire the 2-way valve.
Step 1. Uncover the front cover of the unit and open the control box.
Step 2. Find the terminal block and connect wires as below.
XT3
2-Way
Valve 1
L2(ON)
L1(OFF)
N
XT3
2-Way
Valve 1
NO valve
N
XT3
2-Way
Valve 1
NC valve
N
WARNING
• Normal Open type should be connected to wire (OFF) and wire (N) for valve closing in cooling mode.
• Normal Closed type should be connected to wire (ON) and wire (N) for valve closing in cooling mode.
(ON) : Line signal (for Normal Open type) from PCB to 2-way valve
(OFF) : Line signal (for Normal Closed type) from PCB to 2-way valve
(N) : Neutral signal from PCB to 2-way valve
11. 3-Way Valve
The 3-way valve 2 is required for the sanitary water tank. Its role is flow switching between the under floor
heating loop and the water tank heating loop.
General Information
Type Power Operating Mode Supported
SPDT
3-wire
230V 50Hz ~AC
Selecting “Flow A” between “Flow A” and “Flow B” Yes
Selecting “Flow B” between “Flow B” and “Flow A” Yes
(1) SPDT = Single Pole Double Throw. Three wires consist of Live1 (for selecting Flow B), and Neutral (for
common).
(2) Flow A means 'water ow from the indoor unit to under oor water circuit'.
(3) Flow B means 'water ow from the indoor unit to sanitary water tank'.
Follow steps below to wire the 3-way valve:
Follow below procedures Step 1 ~ Step 2.
Step 1. Uncover front cover of the unit and open the control box.
Step 2. Find terminal block and connect wires as below.

Gree GRS-CQ8.0Pd/NhG3-E Specifications

General

Brand	Gree
Model	GRS-CQ8.0Pd/NhG3-E
Category	Air Conditioner
Language	English