EQUATION EQ3-9K Manuel D'installation page 131

Indoor unit
B1
A1
B2
Indoor unit
A2
Outdoor 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.
Maximum refrigerant
charge (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).
Indoor
Completely tightened
Completely tightened
Indoor units
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.
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.
B1
Indoor unit
Outdoor unit
A1
A2
B2
Indoor unit
Model
S-AC-7-IN / S-AC-7-OUT EQ3-9K
S-AC-8-IN / S-AC-8-OUT EQ3-12K
S-AC-9-IN / S-AC-9-OUT EQ3-18K
Outdoor
Flare part
Flare part
Stop valve totally closed
(liquid side))
Sweat joint
Large slip-on connector
Indoor unit
B1
A3
Indoor unit
Outdoor unit
B2
M
0.7 Kg S-AC-10-IN / S-AC-10-OUT
0.82 Kg S-AC-7 & 8 /S-AC-11-OUT
1.3 Kg
Low pressure
piezometer
Stop valve totally closed
(gas side)
Discharging valve
Manhole
Outdoor unit
Line pressure gauge
Tubing bring brazed
Service Hose
Indoor unit
Oil trap
B
Outdoor unit
Indoor unit
Model M
EQ3-24K 1.6 Kg
EQ3-9+12K 1.8 Kg
High pressure
piezometer
Meter separator
Dropping valve
Nitrogen
tank
Cylinder pressure gauge
Cylinder
of
nitrogen
FR
ES
PT
IT
EL
PL
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KZ
UA
RO
EN
131