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ADDITIONAL CHARGE CALCULATION
1-5.
CAUTION
After vacuuming the system, add refrigerant.
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When moving and installing the air conditioner, do not mix gas other than the specified refrigerant
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R410A inside the refrigerant cycle.
Do not reuse recovered refrigerant.
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When charging the refrigerant R410A, always use an electronic scales for refrigerant charging (to
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measure the refrigerant by weight). Adding more refrigerant than the specified amount will cause
a malfunction.
When charging the refrigerant, take into account the slight change in the composition of the gas
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and liquid phases, and always charge from the liquid phase side whose composition is stable.
Adding refrigerant through the gas pipe will cause a malfunction.
Check if the steel cylinder has a siphon installed or not before filling. (There is an indication “with
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siphon for filling liquid” on the steel cylinder.)
FILLING METHOD FOR CYLINDER WITH SIPHON
R410A
Gas
Liquid
Set the cylinder vertical and fill with the liquid.
(Liquid can be filled without turning bottom up with
the siphon inside.)
FILLING METHOD FOR OTHER CYLINDERS
R410A
Gas
Liquid
Turn bottom up and fill with liquid.
(Be careful to avoid turning over the cylinder.)
Be sure to use the special tools for R410A for pressure resistance and to avoid mixing of impure
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substances.
If the units are further apart than the maximum pipe length, correct operation can not be
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guaranteed.
Make sure to back closing valve after refrigerant charging. Otherwise, the compressor may fail.
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Minimize refrigerant release to the air. Excessive release is prohibited under the Freon Collection
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and Destruction Law.
FOR PRE-CHARGE LENGTH
Refrigerant pipe size
Piping length (L) *Pre-charge
[m]
Standard
30
Size up (Liquid pipe)
15
