Sanyo 85464359981002 installation instructions Example, Main tubing Distribution joint tubing

Example:

L1

LA					L2
Main tube of unit		LB		LC			LN		n
1st branch
	1		2			3				model 1852
Unit distribution tube								n–1
	model 0752		model 0952			model 1252		model 1852

●Example of each tubing length

Main tubing	Distribution joint tubing
LA = 131 ft.	Indoor side
LB = 16 ft.	1	= 16 ft.	4 = 20 ft.
LC = 16 ft.	2	= 16 ft.	5 = 16 ft.
LD = 49 ft.	3	= 7 ft.

●Obtain charge amount for each tubing size

Note that the charge amounts per 3.3 ft. are different for each liquid tubing size.

ø3/8" (ø9.52) →	LA	+	LB	+	LC + LD	: 212 ft. ⋅ 0.602 oz/ft.	=	127 oz
ø1/4" (ø6.35) →	1	+	2	+	3 + 4 +	5 : 75 ft. ⋅ 0.279 oz/ft.	=	20 oz
						Total		147 oz

Additional refrigerant charge amount is 147 oz.

CAUTION

Be sure to check the limit density for the room in which the indoor unit is installed.

Checking of limit density

Density limit is determined on the basis of the size of a room using an indoor unit of minimum capacity. For instance, when an indoor unit is used in a room (floor area 80 ft2 ⋅ ceiling height 8.8 ft. = room volume 704 ft.3), the graph at right shows that the minimum room volume should be 497 ft.3 (floor area 56 ft.2) for refrigerant of 147 oz. Accordingly, openings such as louvers are required for this room.

<Determination by calculation>

Overall refrigerant charge amount for the air conditioner: oz

(Minimum room volume for indoor unit: ft.3)

=147 (oz) + 123 (oz) = 0.38 (oz/ft.3) > 0.3 (oz/ft.3) 704 (ft.3)

Therefore, openings such as louvers are required for this room.

Min. indoor volume

ft.3

4000
3500	Range below
3000	the density limit of
	0.3 oz/ft.3
2500	(countermeasures
	not needed)
2000
1500
			Range above
1000			the density limit of
500			0.3 oz/ft.3
			(countermeasures
0			needed)
0	200	400	600	800	1000
	Total amount of refrigerant

ft.2

454

398

341		area
284		floor
227
		indoor
170
	114	Min.
	57
0
1200
	oz

(when the ceiling is 8.8 ft. high)

16