Connection Of Waterway System - Gree GRS-CQ4.0Pd/NhG-K Mode D'emploi

Air-to-water Heat Pump
Description
Hot water outlet of water tank
Circulating water inlet/outlet of water tank
Cooling water inlet of water tank
Pipe joint

16.3 Connection of waterway system

(1) If connection between water tank and indoor unit should be through the wall, drill a hole φ70 for pass of
circulating water pipe. It is unnecessary if the hole is not needed.
(2) Preparation of pipelines: Circulating water outlet/inlet pipe must be hot water pipe, PPR pipe with nominal
out diameter of dn25 and S2.5 series (wall thickness of 4.2mm) being recommended. Cooling water inlet
pipe and hot water outlet pipe of water tank should also be hot water pipe, PPR pipe with nominal out
diameter of dn20 and S2.5 series (wall thickness of 3.4mm) being recommended. If other insulated pipes
are adopted, refer to the above dimensions for out diameter and wall thickness.
(3) Installation of circulating water inlet/outlet pipes: connect the water inlet of the unit with circulating outlet of
water tank and water outlet of unit with circulating inlet of water tank.
(4) Installation of water inlet/outlet pipes of the water tank: safety check valve, filter and cut-off valve must be
installed for the water inlet pipe according to the installation sketch of the unit. At least a cut-off valve is
needed for the water outlet pipe.
(5) Installation of blow-off pipes at the bottom of water tank: connect a piece of PPR pipe with drainage outlet
to floor drain. A cut-off valve must be installed in the middle of the drainage pipe and at the place where it is
easy to be operated by the users.
(6) After connection of all waterway pipelines, perform the leakage test firstly. After that, bind up the water
pipes, water temp sensor and wires with wrapping tapes attached with the unit.
(7) Refer to Installation Sketch of the Unit for details.
Power cord of booster heater
Description
Circulating water inlet/outlet of main unit
Cooling water inlet of water tank
Circulating water inlet/outlet of water tank
Hot water outlet of water tank
Notes
(a) Distance between indoor unit and water tank should not exceed 5m levelly and 3m vertically. If higher,
Joints Dimension
Water Tank
Water tank temp. sensor
Safety check
valve
Cool Water
Inlet
Blow-off Outlet
Cut-off Valve
34
MONOBLOC TYPE
Joint pipe thread
1/2"Female BSP
3/4"Female BSP
1/2"Female BSP
3/4"Female BSP
Hot water output
Other
Thermal
System
Filter
Tap water
Joint pipe thread
1"Male BSP
1/2"Female BSP
3/4"Female BSP
1/2"Female BSP