Gree GRS-1.5/D150ANbA-K, Service Manual

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GREE AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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Items to be checked during drawing review:
No. Item Check Result
1 The unit is provided with a condensate water drainage pipe.
2
The unit installation position meets space requirements for heat
exchange and maintenance.
3
The specification, type, and control method of the power cable meet
design requirements of the unit.
4
Preparation, total length, and control method of the control cable meet
design requirements of the unit.
Caution:
The construction personnel shall strictly follow the design drawing. During construction, if any design
requirement cannot be met and needs to be changed, the design requirement can be changed upon
approval of the design personnel and a written document should be formulated accordingly.
2.3 Installation Material Selection
2.3.1 Precautions
(1) If the brand and specifications of installation materials are specified by the user, user requirements
must be met. If not specified, the installation materials purchased shall follow national regulations and
meet quality requirements.
(2) The certificate of quality or inspection report must be provided for materials and devices used for
installation.
(3) A fire-proof inspection certificate must be provided for products with fire-proof requirement and
these products must comply with national regulations and mandatory standards.
(4) When environmental-friendly materials are required by the user, all materials shall meet national
environment-protection requirements and relevant certificates must be provided.
2.3.2 Requirements on Installation Material Selection
2.3.2.1 Water Pipe Selection
(1) Selection of PPR water pipe
Generally, PPR pipes are adopted as hot water pipes for their various advantages such as light
weight, corrosion resistance, scaling-free, long service life, easy installation, heat preservation and
energy-saving, and good heat resistance. PPR pipes are connected by hot melting. Common series and
specification are listed in the following table.
Nominal Outside
Diameter
Dn
Average Outside Diameter
Pipe Series
S5 S4 S3.2 S2.5 S2
Maximum Minimum Nominal Wall Thickness en
20 20.0 20.3 - 2.3 2.8 3.4 4.1
25 25.0 25.3 2.3 2.8 3.5 4.2 5.1
Note: Generally, S4 series pipes are adopted for cool water and S2.5 series pipes are adopted for hot
water.
(2) Selection of condensate water pipe
1) Rigid PVC pipes are recommended for water drainage as they are easy to purchase and install.