Gree GRS-CQ8.0Pd/NaEK Service Manual page 95

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.
Installation of circulating water inlet/outlet pipes: Connect the water inlet of unit with circulating outlet
of water tank and water outlet of unit with circulating inlet of water tank.
Installation of water inlet/outlet pipes of water tank: Safety check valve (→ on the valve body points
at water tank), filter and cut-off valve must be installed for water inlet pipe according to the installation
sketch of unit. At least a cut-off valve is needed for the water outlet pipe.
Installation of blow-off pipe 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.
After connection of all waterway pipelines, perform leakage test firstly (refer to debugging of the
unit). After that, bind up the water pipes, water temp sensor and wires with wrapping tapes attached with
the unit.
Refer to Installation Sketch of Unit for details.
Circulating water inlet/outlet of main unit
Circulating water inlet/outlet of water tank
Note:
① Distance between inner unit and water tank should not exceed 5m levelly and 3m vertically. If
higher, please contact with us. Water tank on lower and main unit on higher side is recommended.
Description
Cooling water inlet of water tank
Hot water outlet of water tank
Installation
Joint pipe thread
1/2"Female BSP
3/4"Female BSP
1/2"Female BSP
90
1"Male BSP