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24
ENGLISH
h
h
≥ 0.2 m [0.66 ft]
Toward indoor unit
Toward indoor unit
Oil Trap
(Example 3)
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5 kW(48 kBtu/hr) -1 EA,
Ceiling concealed Duct 7.3 kW(24 kBtu/hr)-2 EA,
Wall Mounted 2.3 kW(7 kBtu/hr)-4 EA
CF = [0.64 kg (1.411 lbs)×1 EA] + [0.26 kg (0.573 lbs)×
2 EA] + [0.26 kg (0.529 lbs)×4 EA]
= 2.12 kg (4.67 lbs)
WARNING
• Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following
equation for human safety.
If the above equation can not be satisfied, then follow the
following steps.
• Selection of air conditioning system: select one of the next
- Installation of effective opening part
- Reconfirmation of Outdoor Unit capacity and piping length
- Reduction of the amount of refrigerant
- Installation of 2 or more security device (alarm for gas leakage)
• Change Indoor Unit type
:
installation position should be over 2 m (6.6 ft) from the floor (Wall
mounted type ’ Cassette type)
• Adoption of ventilation system
: choose ordinary ventilation system or building ventilation
system
• Limitation in piping work
: Prepare for earthquake and thermal stress
!
Volume of the room at which Indoor Unit of
the least capacity is installed
Total amount of refrigerant in the system
≤0.44 kg/m
3
(0.028 lbs/ft
3
)
h
Toward indoor unit
(Example 2)
Attach the additional refrigerant table of IDU.
The amount of Refrigerant
The calculation of the additional charge should take into account the
length of pipe and CF(correction Factor) value of indoor unit.
Include only for
Heat Recovery
system
Total liquid pipe : Ø 25.4 mm (1.0 inch)
Additional charge[kg(lbs)]
Total liquid pipe : Ø 22.2 mm (7/8 inch)
Total liquid pipe : Ø 19.05 mm (3/4 inch)
Total liquid pipe : Ø 15.88 mm (5/8 inch)
Total liquid pipe : Ø 12.7 mm (1/2 inch)
Total liquid pipe : Ø 9.52 mm (3/8 inch)
Total liquid pipe : Ø 6.35 mm (1/4 inch)
Number of installed HR units
CF value of indoor unit
=
+
+
+
+
+
+
+
× 0.480 kg/m (0.323 lbs/ft)
× 0.354 kg/m (0.238 lbs/ft)
× 0.266 kg/m (0.179 lbs/ft)
× 0.173 kg/m (0.116 lbs/ft)
× 0.118 kg/m (0.079 lbs/ft)
× 0.061 kg/m (0.041 lbs/ft)
× 0.022 kg/m (0.015 lbs/ft)
× 0.5 kg (1.1 lbs)
※ 6 & 8 Branches
Model : 1.0 kg/EA
(2.2 lbs/EA)
- When connecting the pipes between the outdoor units, the
accumulation of oil in the slave outdoor unit should be avoided.
Otherwise, the unit may not operate properly.
(Example 1)
Toward indoor unit
Toward indoor unit
1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 24
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