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Refrigerant Charging Procedure
1. Determine addition refrigerant charge.
Please refer to your units installation manual for proper charge. If your lineset exceeds the chart below for your
model, additional charge may be required. The charge must we weighed in with a refrigerant charging scale.
You can only add additional refrigerant to a new installation. If a low or high charge is suspected, you must
reclaim the refrigerant, then weigh in the correct amount per specifications including any additional for long
linesets.
It is important to check for leaks before adding refrigerant.
The Neo single zone units contain a factory charge adequate for up to a total length of refrigerant line as
indicated in the chart below. Additional refrigerant will need to be added for total lengths over the listed length.
Confirm the following chart with your installation manual for additional charge amounts:
GWH09MA-
A3DNA2B
GWH12MA-
A3DNA2B
GWH09MB-
D3DNA3D
GWH12MB-
D3DNA3D
Additional Charge
0.22 oz./ft.
0.22 oz./ft.
0.22 oz./ft.
0.22 oz./ft.
Max Length without
Additional Charge
25 ft.
25 ft.
25 ft.
25 ft.
Factory Charge
42 oz.
45.5 oz.
46 oz.
46 oz.
Max. Total Piping
Length
66 ft.
66 ft.
50 ft.
66 ft.
Max. Elevation
33 ft.
33 ft.
33 ft.
33 ft.
GWH18MC-
D3DNA3D
GWH24MD-
D3DNA3D
GWH30LB-
D3DNA3E
GWH36LB-
D3DNA3E
Additional Charge
0.22 oz./ft.
0.5 oz./ft.
0.5 oz./ft.
0.5 oz./ft.
Max Length without
Additional Charge
25 ft.
25 ft.
25 ft.
25 ft.
Factory Charge
49 oz.
56 oz.
84.7 oz.
91.7 oz.
Max. Total Piping
Length
82 ft.
82 ft.
100
100
Max. Elevation
33 ft.
33 ft.
33 ft.
33 ft.
