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Refrigerant Pipe Installation
Charging the System with Additional Refrigerant
Calculating the Amount of Additional Refrigerant Required
Refrigerant in the System When Shipped from the Factory
When the system is charged with refrigerant at the factory, the amount of refrigerant needed
for the pipes at the site is not included. Calculate the additional amount needed, and add that
amount to the system.
Calculation
Calculate the additional refrigerant to be added to the system on the basis of the size of the
liquid-side pipes in use at the site, and their length.
Refrigerant to be added at site =
(length of liquid-side pipe) x (additional amount of refrigerant per meter of liquid-side pipe)
Additional refrigerant R (kg) = (L1 x 0.030kg/m)
L
1
: Total length (m) of 6.4mm-diameter liquid-side pipe
L
2
: Total length (m) of 9.5mm-diameter liquid-side pipe
L
3
: Total length (m) of 12.7mm-diameter liquid-side pipe
L
4
: Total length (m) of 15.9mm-diameter liquid-side pipe
L
5
: Total length (m) of 19.0mm-diameter liquid-side pipe
L
6
: Total length (m) of 22.2mm-diameter liquid-side pipe
Example of calculation
Outdoor unit Model
MM-A0224HT MM-A0280HT MM-A0160HX MM-A0224HX MM-A0280HX
Charging amount (kg)
15.5
17.0
5.0
7.0
9.0
Ø9.5 (10m)
Ø9.5 (10m)
Ø9.5 (10m)
Liquid pipe
Ø12.7 (30m)
Ø9.5 (10m)
Ø9.5 (10m)
Ø9.5 (5m)
Ø6.4 (5m)
Ø6.4 (5m)
056 056 028 056 028
Liquid pipe:
Ø6.4 = 5 + 5 = 10m
Ø9.5 = 10 + 10 + 10 + 10 + 4 + 10 = 54m
Ø12.7 = 30m
R = (10m x 0.030kg/m) + (54m x 0.065kg/m) + (30m x 0.115kg/m) = 7.26kg
MM-A0224HT
Summary of Contents for MM-A0160HX
Page 1: ...Service Manual Air Conditioner Multi Split Type System Modular Multi System HFCR407C A90 0130 ...
Page 2: ......
Page 133: ...134 20 Additional Literature and Contacts ...
Page 134: ...135 20 Additional Literature and Contacts ...
Page 135: ...TOSHIBA AIR CONDITIONING www toshiba aircon co uk MADE IN UK A90 0130 Revised April 2001 ...
