Tubing Chart

A copper-silver alloy with a high silver content should be used when iron or steel material is involved in the joint. These alloys require the use of silver solder flux. Alloys containing phosphorus should not be used with iron or steel. Phosphorus reacts with the iron forming iron phosphate which is extremely brittle.

CAUTION

1.Brazing alloys with a melting temperature below 700° F should not be used. 2. Lead- tin or tin-antimony solders should not be used due to their low melting point and necessity for corrosive fluxes.

To further prevent the formation of copper oxide inside the tubing, dry nitrogen may be purged through the refrigerant system during brazing.

WARNING

Never purge or pressurize a system with oxygen. An explosion and fire will result.

10.After brazing, quench with wet rag to cool the joint and remove any flux residue.

11.Leak test all connections using an electronic leak detector or a halide torch.

12.Evacuate suction line, liquid line and indoor unit through outdoor unit base valves.

13.Open both the suction and liquid base valves to the fully open position. Refer to section later in installation instructions for details on setting proper system charge.

FIELD FABRICATED TUBING CONNECTIONS: QUICK CONNECT INDOOR UNIT and SWEAT OUTDOOR UNIT USING CTO KIT

Use only refrigeration grade (dehydrated and sealed) copper tubing. Care must be taken to insure that the tubing is kept clean and dry before and during installation. Do not remove the plugs from the tubing ends, coil connections or base valves until the connection is ready to be brazed.

The suction line must be insulated with a minimum of 3/8” Armaflex or equivalent before cutting and making connections.

1.Being careful not to kink, route both the suction line and liquid line between the indoor unit and outdoor unit. Use a tubing bender to make any necessary bends in tubing. When necessary to bend the insulated tube suction line, cut the insulation around its circumference at a distance far enough beyond the point of the bend so as to clear the tubing bender. Slip the insulation back together and vapor seal the joint with tape. Coil any excess tubing in a horizontal place with the slope of the tubing toward the condensing unit. See Figure 3.

CAUTION

1.Be careful not to tear the insulation when pushing it through hole in masonry or frame walls. 2. When sealing the tube opening in house wall, use a soft material to prevent tube damage and vibration transmission. 3. Avoid excessive bending in any one place to avoid kinking.

TABLE 4

		Refrigerant Line Length				(Ft.)
Basic
Basic	0 - 20		21 - 60			61 - 100
Condensing	0 - 20		21 - 60			61 - 100
Condensing
Unit Model	Liquid	Suction	Liquid	Suction	Liquid		Suction

HAC181	1/4"	5/8"	1/4"	5/8"		3/8"	3/4"

HAC241	3/8"	5/8"	3/8"	3/4"		3/8"	3/4"

HAC301	3/8"	5/8"	3/8"	3/4"		3/8"	3/4"

HAC361	3/8"	5/8"	3/8"	3/4"		1/2	7/8"

HAC421	3/8"	3/4"	3/8"	7/8"		1/2	7/8"

HAC481	3/8"	7/8"	3/8"	7/8"		1/2	1-1/8"

HAC601	3/8"	7/8"	3/8"	7/8"		1/2	1-1/8"

Manual 2100-346 Page 6

HAC601-BD040, HAC481-BD040, HAC181-AD040, HAC361-AD040, HAC481-AD040 specifications

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