DC Inverter Multi VRF System
17
Diameter of liquid
pipe(mm/inch)
Φ22.2(Φ7/8)
Φ19.05(Φ3/4)
Φ15.9(Φ5/8)
Φ12.7(Φ1/2)
Φ9.52(Φ3/8)
Φ6.35(Φ1/4)
kg/m
0.35
0.25
0.17
0.11
0.054
0.022
oz/inch
0.314
0.224
0.152
0.099
0.048
0.020
First confirm that there is no leakage from the system. When compressor is not working, charge
additional R410A with specific amount to the unit through the filling opening of the liquid pipe valve of the
outdoor unit. If required amount cannot be quickly filled due to pressure increase of the pipe, then set the
unit in cooling startup and fill refrigerant from the low pressure check valve of the outdoor unit.
(3) Calculation example.
Fig. 29
IDU:
No.
IDU
①
IDU
②
Model
Wall-mounted type GMV-ND06G/B4B-T(U)
Wall-mounted type GMV-ND06G/B4B-T(U)
Liquid pipe:
No.
A
a
b
Pipe size(mm/inch)
Φ6.35(Φ1/4)
Φ6.35(Φ1/4)
Φ6.35(Φ1/4)
Length(m/feet)
5(16-3/8)
5(16-3/8)
5(16-3/8)
Total length of each liquid pipe
Φ
6.35: A+a+b =5+5+5=15m (49-1/8feet)
Quantity of indoor unit: 2 sets
Therefore, the minimum quantity of additional refrigerant =0.2×2+15×0.022=0.73kg(25.7oz)
4.7 Electric Wiring
4.7.1 Notices for Wiring
(1) Install units according to national wiring codes.
(2) Use air conditioner specialized power supply and make sure that it is consistent with
system’s rated voltage.
(3) Do not pull the power cord with force.
(4) All electrical installation must be performed by qualified technicians in accordance with local
laws, regulations and this user manual.
(5) Caliber of the power cord must be large enough. A damaged power cord or connection wire
must be replaced by specialized electrical cords.
(6) If the supply cord is damaged, it must be replaced by the manufacturer or its service agent
or a similarly qualified person in order to avoid a hazard.
(7) An all-pole disconnection device which has at least 3mm (1/8inch) clearances in all poles
and disconnection must be incorporated in the fixed wiring in accordance with the wiring
Summary of Contents for GMV-12WP/A-T
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