Gree HOME GMV [176/367] Installation requirements of refrigerant piping

Gree HOME GMV [176/367] Installation requirements of refrigerant piping
Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION
172
water tank by using PPR pipe.
Check Valve
Faucet Water
Note: To ensure safety during use of water, the inlet and outlet of water tank must be
connected with a specific length of PPR pipe. The length “L" is calculated as below:
L70×R
2
, in which “L” refers to pipe length (unit: mm) and “R” refers to the inner
radius of the pipe (unit: cm). Thermal insulation shall be done and metal pipe shall
not be used. For the first time of use, make sure that the water tank is filled with
water before connecting to the power. The water tank shall not run without water.
9 INSTALLATION REQUIREMENTS OF REFRIGERANT PIPING
9.1 Specification
R410a refrigerant system
External
Diameter(mm/inch)
Thickness(mm)
External
Diameter(mm/inch)
Thickness(mm)
φ6.35 0.8 φ22.2 1.5
φ9.52 0.8 φ25.4 1.5
φ12.7 1 φ28.6 1.5
φ15.9 1 φ34.9 1.5
φ19.05 1
9.2 Allowable Length and Height Differences of the Refrigerant Piping between the Indoor and
Outdoor Units
Water tank
Indoor unit
Outdoor unit
Hydro unit
Equivalent length of the farthest fitting pipe L
The 1st manifold
Indoor unit
Equivalent length is based on one Y-type manifold pipe per 0.5m
Equivalent length of the farthest fitting pipe on 1st manifold L

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