Cooperation Between Different Professions - Gree GMV5 Series Service Manual

GMV5 D.C INVERTER MULTI VRF
The ratio of slop for condensate
water pipe is insufficient or the
11
condensate water pipe is
incorrectly connected.
The air channel is improperly
12
fixed.
The guide vane of air channel is
13
not reasonably manufactured.
The refrigerant pipe or condensate
14 water pipe does not meet the
insulation requirement.
The installation space for IDU is
15
insufficient.
The IDU or the location of the air
16 outlet or return air inlet is not
designed reasonably.
17 The ODU is improperly installed.
Power cables are incorrectly
18
provided.
Control communication cables are
19 incorrectly provided or improperly
connected.
Control communication cables are
20
not 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.

1.3 COOPERATION BETWEEN DIFFERENT PROFESSIONS

A quality installation of air conditioning engineering depends on careful organization and close
cooperation between different professions such as architecture, structure, electric, water supply and
drainage, fire-fighting, and decoration. Pipes must be laid in places away from any automatic spray head
for fire-fighting, and must be reasonably arranged to ensure that the pipes fit the electric, luminaries, and
decoration.
1.3.1 Requirements for cooperation with civil engineering:
(1) The riser should be installed in the air conditioning tube well, and the horizontal pipe should be
placed in the ceiling, if possible.
(2) A place should be reserved for the ODU base to prevent the waterproof layer or insulating layer
on the roof from being damaged in later phase of installation.
(3) At places on walls or floors where pipes need to go through, holes or casing should be preserved.
If the pipe needs to go through a bearing beam, a steel casing must be prepared.
1.3.2 Requirements for cooperation with decoration engineering:
The air conditioning installation should not damage the bearing structure or the decorative style. Air
conditioning pipes should be laid out along the bottom of the beam as possible. If pipes meet one
another at the same elevation, process based on the following principles:
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.
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SERVICE MANUAL