Installation Materials Selection; Refrigerant Piping; Material Requirement; Appearance Requirement - Gree GMV-24WL/C-T Service Manual

GREE
No. Installation Problem
9 The refrigerant pipe leaks.
Water drainage from the condensate
10
water pipe is not smooth.
The ratio of slop for condensate water
11 pipe is insufficient or the condensate
water pipe is incorrectly connected.
12 The air channel is improperly fixed.
The guide vane of air channel is not
13
reasonably manufactured.
The refrigerant pipe or condensate water
14 pipe does not meet the insulation
requirement.
The installation space for IDU is
15
insufficient.
The IDU or the location of the air outlet or
16
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.
Understand the special requirement (if any) for unit installation before implementation to ensure
installation quality. Relevant installers must have corresponding engineering construction qualifications.
Special type operators involved in the engineering implementation, such as welders, electricians,
and refrigeration mechanics must have relevant operating licenses and are accredited with vocational
qualification certification.

2 Installation Materials Selection

The materials, equipment and instruments used during air conditioning engineering construction
must have certifications and test reports. Products with fireproof requirements must be provided with
fireproof inspection certificates and must meet national and relevant compulsory standards.
environmentally-friendly materials are to be used as required by customers, all such materials must meet
national environmental protection requirement and be provided with relevant certificates.

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, copper powder, carbon deposition, rust, dirt or severe oxide
film, and without obvious scratch, pit, spot and other defects.
DC Inverter Side Discharge VRF Ⅱ for North America
Possible Consequence
Insufficient refrigerant circulating in the system decreases the cooling
performance of the air conditioner. Long-term operation under such
circumstance may cause an overheating compressor or even damage
the compressor.
Residual water in IDUs can affect the normal operation of the system.
The possible water leakage can damage the IDU's decoration.
Reverse slop or inconsistent connection of condensate water pipe can
hinder the smooth drainage and cause leakage of the IDU.
The air channel will deform; vibration and noise occur during unit
operating.
Uneven air quantity allocation reduces the overall performance of the
air conditioner.
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.
The ODU is difficult to be maintained; unit exhaust is not smooth,
which reduces the 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 surrounding areas.
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 turn in a mess.
The communication cables are short-circuited or disconnected, and
the unit cannot be started up due to communication failure.
65
If