Giatsu GIA-CEN-10KOMP Manuel D'installation page 33

4.11 Refilling volume of refrigerant
The refilling volume of refrigerant (R410A) is calculated according to the diameter and length of the pipe at the liquid side of the indoor and
outdoor units.
Note: The R410A refrigerant must be weighed by an electronic scale and filled in the liquid state.
4.12 Stop valve instructions
1) It is closed when leaving the factory;
2) Open the valve counterclockwise or close the valve clockwise with a 6mm socket head wrench;
3) After completing the operation, tighten the valve cover;
4) R410A special tool shall be used to vacuumize the valve and fill the refrigerant at the service entrance. Fill the refrigerant at the service
entrance at the gas side, and vacuumize the valve at the service entrance at the liquid side and the gas side simultaneously.
Service entrance
Valve cover
Valve stem
4.13 Thermal insulation of pipe
1) Apply thermal insulation to the pipes at the gas side and the liquid side respectively;
2) Use closed-cell thermal insulation materials, with the flame retardant grade of B1 and high temperature resistance of 120℃ ;
3) Outer diameter of copper pipe ≤
thickness of
thermal insulation cotton ≥ 20mm.
4) The nut joints of the indoor unit shall be performed thermal insulation
!
NOTE
· The power supplies for the indoor and outdoor units shall be separately designed.
· The power supply must be designed with a sub-circuit, and equipped with a current leakage protector and a manual switch.
· All indoor units in the same system shall be arranged on the same power circuit, and shall be turned on/off the power simultaneously. It
is not allowed to equip each indoor unit with a power switch.
· The connecting wire system and the refrigerant pipe system of the indoor unit shall be incorporated into the same system.
· To reduce the interference, the indoor and outdoor communication cables shall use two-core or three-core shielded twisted-pair cables
instead of ordinary multi-core cables.
· Conform to related national electrical standards.
· Electrical wiring shall be done by a professional electrician.
Table 4-7 Refilling Volume of Refrigerant
Diameters of pipe at the
liquid side (mm)
φ6 .35
φ9 .52
Opening direction
Fig. 4-9 Stop Valve Instructions
φ12.7 and thickness of
thermal insulation cotton ≥ 15mm; outer diameter of copper pipe ≥
Refilling volume of refrigerant equal to
the length of 1m pipe (unit: kg)
0. 023
0.040
Vacuumizing
Opening direction
Liquid side Gas side
9
Refilling refrigerant
φ15.88 and