38
Piping System
Maximum Additional Refrigerant Charge
Total additional charge must not exceed the maximum additional refrigerant charge indicated in the following table.
Accordingly, allowable total piping length may become shorter than maximum value due to the limitation of maximum
additional refrigerant amount.
Capacity (kBtu/h) 72 96 120 144~168 192~240 264 288~336 360~384 408~456
Max. Additional Refrigerant
Charge (lbs(kg))
62.8
(28.5)
67.2
(30.5)
69.4
(31.5)
76.1
(34.5)
90.4
(41.0)
100.3
(45.5)
112.4
(51.0)
126.8
(57.5)
144.4
(65.5)
Ref. Charge of O.U. Before Shipment (W0) lbs
Outdoor Unit
(kBtu/h)
W0 Outdoor Unit
Ref. Charge (lbs(kg))
72 13.2(6.0)
96 13.2(6.0)
120 19.4(8.8)
144 21.6(9.8)
168 21.6(9.8)
192 25.4(11.5)
NOTE
：
● W0 is outdoor unit ref. charge before shipment.
● In case of the combination of the basic unit, calculate the total ref. charge before shipment of the outdoor units to be
combined.
2. Charging Work
Charge refrigerant (R410A) into the system according to Section 6.3. in INSTALLATION chapter.
3. Record of Additional Charge
Total refrigerant charge of this system is calculated in the following formula.
lbs
Total Additional Charge
:
W
Total Ref. Charge:
lbs
Date of Ref.
/ /
Charge Work:
Total Ref. Charge = W
+ Wo
This System
=
+
=
lbs
To Next Page
Loading...
Need help?
General
