Charging - Friedrich MD12Y3JM Manual De Instrucciones

Charging

■ If installed total piping length is more than standard total length, additional refrigerant charging is
necessary.
Below standard total piping length, additional refrigerant charging is not required.
Outdoor Unit Max total length of all
Capacity (Btu/h pipes (A+B)/(A+B+C)/
class) (A+B+C+D)
24k 75(246)
36k 75(246)
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge
using the charge amount specified on the Unit`s specification label.
Additional charge(oz ) = (Total Installation Piping Length-Standard Total Piping Length) x 0.22
EX) MR36TQY3JM
❈ If the total additional charge value after calculation comes out to be negative, then do not
consider additional charge.
Max length of each Min length of each
pipe (A/B/C/D) pipe (A/B/C/D)
25(82)
25(82)
9k
a
b 9k
9k
c
Additional Refrigerant
Unit : g/m (oz/ft)
3(9.8) 20(0.22)
3(9.8) 20(0.22)
Each branch pipe
a=82ft
b=16ft
c=49ft
Additional Charge
= {(82+16+49)-98.4} x 0.22 = 10.69 oz
Installation Manual 47
Charging
Unit:m(ft)
Standard Total Piping
Length (No Add`l
refrigerant)
22.5(74)
30(98.4)