– 84 –
Checklist 2
• Check the additional amount of refrigerant.
Calculate the additional amount of refrigerant from the additional amount of refrigerant (A) by the pipe
diameter on the liquid side, the pipe length to be connected, and the corrective amount of refrigerant (B)
according to system capacity.
First, enter the total length for each liquid pipe diameter in the following table, and then calculate the additional
amount of refrigerant by pipe length.
<(A) : Additional amount of refrigerant by pipe length>
Next, refer to the following table for the corrective amount of refrigerant (B) according to system capacity.
<(B) : Adjustment amount of rifrigerant according to system capacity>
Lastly, add the additional amount of refrigerant by pipe length (A) to the Adjustment amount of according
refrigerant to system capacity (B).
This is the final additional.
<Additional amount of refrigerant>
Additional
refrigerant charge
amount (lb)
Actual length
of liquid pipe
Additional refrigerant
charge amount
per liquid pipe 1 ft
Adjustment amount of refrigerant
according to system capacity
= × × 1.3 +
(A) (B)
Pipe diameter on the
liquid side
Additional refrigerant
amount/1ft
(lb)
Total pipe length on
each liquid side
(ft)
Additional mount of refrigerant pipe
diameter on each liquid side
(lb)
Ø1/4"
Ø3/8"
Ø1/2"
Ø5/8"
Ø3/4"
0.017
0.037
0.071
0.108
0.168
×
×
×
×
×
=
=
=
=
=
total
Additional amount of refrigerant by pipe length (A)
Outdoor unit capacity type
Adjustment amount of
refrigerant (lb)
Combined outdoor units
072 type
096 type
120 type
144 type
168 type
192 type
216 type
240 type
5.5
20.9
27.5
5.5
23.1
30.8
34.1
37.4
072 type
096 type
120 type
072 type
096 type
096 type
120 type
120 type
—
—
—
072 type
072 type
096 type
096 type
120 type
(A) : Additional amount of refrigerant by pipe length (lb)
(B) : Adjustment amount of refrigerant according to system capacity (lb)
(A) + (B) : Additional amount of refrigerant (lb)
To Next Page
Loading...
