Installation Manual
39
4) When the compressor is not running, charge the R410A refrigerant into the refrigerant pipe from the liquid valve of the
outdoor unit (do not do it from the gas valve).
a.
Calculation of the Additional Refrigerant Charging
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Model
GWHD(36)NK3AO
GWHD(42NK3AO
Refrigerant Charge (kg)
3.6
4.8
Notes
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refrigerant pipe.
ĸ
The amount of the additional refrigerant charge is dependent on the diameter and length of the liquid refrigerant pipe
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Record the additional refrigerant charge for future maintenance.
2) Calculation of the Additional Refrigerant Charge
,IWKHWRWDOUHIULJHUDQWSLSHOHQJWKOLTXLGSLSHLVVPDOOHUWKDQWKDWOLVWHGLQWKHWDEOHEHORZQRDGGLWLRQDOUHIULJHUDQWZLOOEH
charged.
7DEOH
Model
7RWDO/LTXLG3LSH/HQJWKDEFGH
GWHD(36)NK3AO
P
GWHD(42)NK3AO
P
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1RWHLIWKHWRWDOUHIULJHUDQWSLSHOHQJWKLVODUJHUWKDQWKDWOLVWHGLQWKHWDEOHDERYHWKHDGGLWLRQDOUHIULJHUDQWIRUWKHH[WUD
OHQJWKRIWKHSLSHQHHGVWREHFKDUJHGDVSHUJP
3) Example : GWHD (42) NK3AO
Fig.9
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Serial No.
Model
Indoor Unit
Ļ
Ducted Type GFH(09)EA-K3DNA1A/I
Indoor Unit
ĺ
Ducted Type GFH(09)EA-K3DNA1A/I
Indoor Unit
Ĺ
Ducted Type GFH(09)EA-K3DNA1A/I
Indoor Unit
ĸ
Ducted Type GFH(09)EA-K3DNA1A/I
Indoor Unit
Ducted Type GFH(18)EA-K3DNA1A/I
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Serial No.
e
d
c
E
a
Diameter
ĭ
ĭ
ĭ
ĭ
ĭ
Length
20m
20m
15m
5m
5m
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refrigerant charge=(65-50)×0.022=0.33kg (Note: no additional refrigerant is needed for the liquid pipe within 50m).
a
b
c
d
e
