EQUATION EQ3-9K - Maximum refrigerant charge (M):; Installation Procedure - Air Tightness Test; Air Tightness Test Procedure

FR
ES
PT
IT
EL
PL
RU
KZ
UA
RO
EN
131
A
B
A
B
A
B
B
A1
B1
A2
B2
B1
B2
A3
A1
B1
A2
B2
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Oil trap
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
• Max.Elevation : A1 max =15m - A2 max =15m - A3 max =15m
• In case the elevation B is more than 5m, oil trap should be installed every 5-7m
• Max. Length : B1 max = 20m - B2 max = 20m - B1 + B2 max = 30m
• Min. Length : B1 min = 3m - B2 min = 3m
• In case the pipe total length (B1+B2) is more than 20m, the refrigerant should be charged, according to 20g/m.
Installation Procedure - Air Tightness Test
After finishing connection of refrigerant pipe, it shall perform air tightness test.
• The air tightness test adopts nitrogen tank to give pressure according to the
pipe connection mode as the following figure shown.
• The gas and liquid valve are all in close state. In order to prevent the nitrogen
entering the circulation system of outdoor unit, tighten the valve rod before
giving pressure (both gas and liquid valve rods).
Maximum refrigerant
charge (M) :
1 - Pressurize for over 3 minutes at 0.3MPa (3.0
kg/cm²g).
2 - Pressurize for over 3 minutes at 1.5MPa (15 kg/
cm²g). A large leakage will be found
3 - Pressurize for about 24 hours at 3.0MPa (30 kg/
cm²g). A small leakage will be found.
4 - Check if the pressure drops.
If the pressure does not drop, then pass.
If the pressure drops, then please check the
leaking point
When pressurizing for 24 hours, a variation of
1°C in the ambient temperature will cause a
variation of 0.01MPa(0.1kg/cm²g) in pressure. It
shall be corrected during test.
Low pressure
piezometer
High pressure
piezometer
Meter separator
Nitrogen
tank
Cylinder
of
nitrogen
Dropping valve
Discharging valve
Manhole
Stop valve totally closed
(gas side)
Stop valve totally closed
(liquid side))
OutdoorIndoor
Completely tightened
Completely tightened
Flare part
Flare part
Indoor units
Outdoor unit
Line pressure gauge
Cylinder pressure gauge
Sweat joint
Tubing bring brazed
Large slip-on connector
Service Hose
5 - Checking the leaking point
In 1 to 3 steps, if the pressure drops, check the leakage in each joint by listening, touching and using soap water etc. to identify the
leaking point. After confirming the leaking point, welding it again or tighten the nut tightly again.
Model
M
Model
M
S-AC-7-IN / S-AC-7-OUT
EQ3-9K
0.7 Kg
S-AC-10-IN / S-AC-10-OUT
EQ3-24K
1.6 Kg
S-AC-8-IN / S-AC-8-OUT
EQ3-12K
0.82 Kg
S-AC-7 & 8 /S-AC-11-OUT
EQ3-9+12K
1.8 Kg
S-AC-9-IN / S-AC-9-OUT
EQ3-18K
1.3 Kg