Sanyo 85464359982001 installation instructions Main tubing

07-007 W-2WAY_II_NA 1/23/07 6:09 PM Page 18

●Obtain liquid tubing size from Tables 1-9, 10, 11, 12 and 15.

Main tubing

LA = ø5/8 (ft.) (Total capacity of indoor unit is 179,400 BTU/h) LB = ø1/2 (ft.) (Total capacity of indoor unit is 131,600 BTU/h) LC = ø3/8 (ft.) (Total capacity of indoor unit is 83,800 BTU/h)

The longest tubing length in this example (LA = 131 ft.)

Distribution joint tubing
Outdoor side	A: ø3/8 (ft.)	B: ø3/8 (ft.)	(from outdoor unit connection tubing)
Indoor side	1: ø3/8 (ft.)	2: ø3/8 (ft.)	3: ø3/8 (ft.)	4: ø3/8 (ft.) (from indoor unit connection tubing)

●Obtain charge amount for each tubing size

Note that the charge amounts per 1 meter are different for each liquid tubing size.

ø5/8 (ft.) → LA	: 131 ft. ⋅ 1.99 oz/ft.	=	261 oz
ø1/2 (ft.) → LB	: 16 ft. ⋅ 1.38 oz/ft.	=	22 oz
ø3/8 (ft.) → LC + A – B + 1 – 4	: 225 ft. ⋅ 0.602 oz/ft.	=	135 oz

Total 418 oz

Additional refrigerant charge amount is 418 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 161 ft.2 ⋅ ceiling height 8.8 ft. = room volume 1417 ft.3), the graph at right shows that the minimum room volume should be 2455 ft.3 (floor area 279 ft.2) for refrigerant of 418 oz.

<Determination by calculation>

Overall refrigerant charge amount for the air conditioner: oz

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

= 418 (oz) = 0.29 (oz/ft.3) < 0.3 (oz/ft.3) 1417 (ft.3)

Therefore, openings such as louvers are not 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)

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