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5.
Refilling refrigerant
Check the type of refrigerant to be used on the machine nameplate.
Precautions when adding R410A
Fill from the liquid pipe in liquid form.
This is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal
operation.
1) Before filling, check whether the cylinder has a siphon attached or not. (It should have something like “liquid filling siphon
attached” displayed on it.)
Filling a cylinder with an attached siphon
Stand the cylinder upright when filling.
There is a siphon pipe inside, so the
cylinder need not be upside-down to
fill with liquid.
Filling other cylinders
Turn the cylinder upside-down
when filling.
•
Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.
6.
Charging with refrigerant
• If the total length of piping for all rooms exceeds the figure listed below, additionally charge with 0.21oz/ft (20g/m) of
refrigerant (R410A) for each additional piping length.
Outdoor unit capacity class
Total length of piping for all rooms
3MXS24
∗
,
4MXS36
∗
131-5/8ft (40m)
2MXS18
∗
98-3/8ft (30m)
CAUTION
Even though the stop valve is fully closed, the refrigerant may slowly leak out; do not leave the flare nut removed for a long
period of time.
English
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