Friedrich FPHW091A Service & Parts Manual page 37

Leak Check, Evacuation, and Charging (Triple Evacuation)
Capacity Pipe Size
(Btu/h)
LIQUID
9k‑12 1/4"(Ø6.35)
18k 1/4"(Ø6.35)
24k‑36k 3/8"(Ø9.52)
37
INSTALLATION
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS A VACUUM)
CHARGE SYSTEM
Standard
Length (ft)
GAS
3/8"(Ø9.52) 24.5
1/2"(Ø12.7) 24.5
5/8"(Ø15.88) 24.5
Fig. 437
WAIT
WAIT
Fig. 436
Max.
Elevation
B (ft)
33
33
33
Max. Length Additional
A (ft) Refrigerant
(oz/ft)
49 .22
49 .22
49 .32