GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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3.3.2.6 Communication System Check
1) The following communication contents must be checked again before commissioning:
2) Communication cables cannot be laid out in the same trough as power cables. Communication
cables should be independently laid out in hard fire-resistant PVC tubes. The parallel spacing
between communication cables and strong electric wires should be larger than 20 cm.
3.3.2.7 Installation and Master of Commissioning Software
3.3.2.8 Spot Check
Spot Check for Commissioning
SN
Spot Check Item
Qualified
1
Is the engineering design diagram complete?
2
Does the construction comply with the design diagram?
3
Is the rated capacity of the IDU/ODU of a single refrigerating system within 50%-135%?
4
Is the number of connected IDUs in a single refrigerating system within 80?
5
Is the access capacity of a fresh-air unit within 30%?
6
Does the difference of level between IDUs and ODUs comply with unit design requirements?
7
Does the difference of level between IDUs comply with unit design requirements?
8
Are long pipes of IDUs and ODUs less than or equal to 165 m?
9
Is the total length of pipes less than 1000 m?
10
Is the spacing between the ODU and the first disperse pipe larger than 90 m? If yes, is the
corresponding pipe diameter increased?
11
Is the spacing between the IDU and the nearest disperse pipe larger than 40 m? If yes, is the
corresponding pipe diameter increased?
12
Does the wall thickness of copper tubes meet design requirements?
13
Are disperse pipes horizontal or vertical?
14
Does the diameter of cables connected with IDUs and ODUs comply with unit design
requirements?
15
Do the circuit breaker and leakage switch comply with unit design requirements?
16
Is the spacing between the power cable and the TV set larger than 1 m?
17
Do communication cable materials comply with unit design requirements?
18
Are all communication cables of IDUs and ODUs serially connected?
19
Is the last-communicating IDU installed with a communication-matched resistance?
20
What is the load of the selected IDU model?
21
Is the foundation of ODU firm? Do shock absorption and water drainage comply with
requirements?
