Gree R410A Manual page 40

Photovoltaic Direct-driven VRF
for North America
The refrigerant pipe or condensate
14
water pipe does not meet the insulation
requirement.
15 The installation space for IDU is
16 The IDU or the location of the air outlet or
return air inlet is not designed reasonably.
17
The ODU is improperly installed.
18 Power cables are incorrectly provided.
Control communication cables are
19 incorrectly provided or improperly
connected.
Control communication cables are not
20
properly protected.
2 Installation Materials Selection
The materials, equipment and instruments used during air conditioning engineering construction must have certifications and test
compulsory standards. If environmentally-friendly materials are to be used as required by customers, all such materials must meet national
2.1 Refrigerant piping
(1) Material requirement: Dephosphorization drawing copper pipe for air conditioners;
(2) Appearance requirement: The inner and outer surface of pipe should be smooth without pinhole, crack, peeling, blister, inclusion,
(3)
(4) The tensile strength must be at least 240 kgf/mm².
(5)
OD (mm/inch)
Φ6.35(1/4)
Φ9.52(3/8)
Φ12.70(1/2)
Φ15.9(5/8)
Φ19.05(3/4)
(6) After the inner part of the copper pipe is cleaned and dried, the inlet and outlet must be sealed tightly by using pipe caps, plugs or
adhesive tapes.
2.2 Condensate water pipe
(1) Pipes that can be used for air conditioner drainage include: water supplying UPVC pipe, PP-R pipe, PP-C pipe, and HDG steel pipe;
(2)
(3)
Water supplying UPVC pipe: Φ32mm×2mm，Φ40mm×2mm，Φ50mm×2.5mm;
HDG steel pipe: Φ25mm×3.25mm，Φ32mm×3.25mm，Φ40mm×3.5mm，Φ50mm×3.5mm.
(4)
Water supplying UPVC pipe: Φ32mm×2mm,Φ40mm×2mm,Φ50mm×2.5mm;
HDG steel pipe: Φ25mm×3.25mm,Φ32mm×3.25mm,Φ40mm×3.5mm,Φ50mm×3.5mm.
2.3 Insulation material
(1) Rubber foam insulation material;
(2) Flame retardancy level: B1 or higher;
(3) Refractoriness: at least 120oC;
(4) The insulation thickness of condensate water pipe: at least 10 mm;
(5) When the diameter of copper pipe is equal to or greater than Φ15.9 mm, the thickness of insulation material should be at least 20
mm; when the diameter of copper pipe is less than 15.9 mm, the thickness of insulation material should be at least 15 mm.
2.4 Communication cable and control cable
38
Water can easily condensate and drip to damage the indoor decoration, or even
trigger the protection mode of system due to overheating operation.
Since there is a lack of space for maintenance and checking, indoor decoration might
need to be damaged during such operation.
The air outlet or return air inlet may be short-circuited, thus affecting the air
conditioning performance.
heat exchanging performance or even prevent the system from normal operation; in
addition, the cold and hot air for heat exchange and the noise may annoy people in
Unit components may be damaged and potential safety hazard may occur.
The normal communication in the system fails or the control over IDUs and ODUs
The communication cables are short-circuited or disconnected, and the unit cannot
be started up due to communication failure.
R410A Refrigerant System
Wall Thickness (mm)
≥0.8
≥0.8
≥0.8
≥1.0
≥1.0
surrounding areas.
turn in a mess.
Model
0
0
0
0
0