Example Of Tubing Size Selection And Refrigerant Charge Amount - Sanyo 85464359982001 Installation Instructions Manual

07-007 W-2WAY_II_NA 1/23/07

1-13. Example of Tubing Size Selection and Refrigerant Charge Amount

Additional refrigerant charging
Based on the values in Tables 1-9, 10, 11, 12 and 15, use the liquid tubing size and length, and calculate the amount of additional
refrigerant charge using the formula below.
Required additional
refrigerant charge (oz)
(a) : Liquid tubing
(b) : Liquid tubing
(c) : Liquid tubing
G Charging procedure
Be sure to charge with R410A refrigerant in liquid form.
1. After performing a vacuum, charge with refrigerant from the liquid tubing side. At this time, all valves must be in the "fully
closed" position.
2. If it was not possible to charge the designated amount, operate the system in Cooling mode while charging with refrigerant
from the gas tubing side. (This is performed at the time of the test run. For this, all valves must be in the "fully open" position.
However if only one outdoor unit is installed, a balance tube is not used. Therefore, leave the valves fully closed.)
Charge with R410A refrigerant in liquid form.
With R410A refrigerant, charge while adjusting the amount being fed a little at a time in order to prevent liquid refrigerant from
backing up.
G After charging is completed, turn all valves to the "fully open" position.
G Replace the tubing covers as they were before.
CAUTION
Example:
Outdoor unit
09053
model
G Example of each tubing length
Main tubing
LA = 131 ft.
LB = 16 ft.
LC = 16 ft.
6:09 PM Page 17
= 3.93 × (a) + 2.78 × (b) + 1.99 × (c) + 1.38 × (d) + 0.602 × (e) + 0.279 × (f)
Total length of ø7/8" (ft.)
Total length of ø3/4" (ft.)
Total length of ø5/8" (ft.)
1. R410A additional charging absolutely must
be done through liquid charging.
2. The R410A refrigerant cylinder has a gray
base color, and the top part is pink.
3. The R410A refrigerant cylinder includes a
siphon tube. Check that the siphon tube is
present. (This is indicated on the label at the
top of the cylinder.)
4. Due to differences in the refrigerant, pres-
sure, and refrigerant oil involved in installa-
tion, it is not possible in some cases to use
the same tools for R22 and for R410A.
09053
model
B A
LC
LB
LA
1 2
48 model 48 model
Distribution joint tubing
Outdoor side
A = 7 ft.
B = 7 ft.
(d) : Liquid tubing Total length of ø1/2" (ft.)
(e) : Liquid tubing Total length of ø3/8" (ft.)
( f ) : Liquid tubing Total length of ø1/4" (ft.)
Balance tube
Use a flathead screwdriver and
open by turning the part with the
screw groove to the right,
from "–" to "|".
Liquid tube
Use a hex wrench (width 5/32 inch)
and turn to the left to open.
3 4
48 model
36 model
Indoor side
1 = 98 ft.
2 = 16 ft.
3 = 16 ft.
4 = 65 ft.
17
Gas tube
Use a flathead screwdriver and
open by turning the part with the
screw groove to the right,
from "–" to "|".