Haier AD842AHEAA, AU84NATEAA operation manual Outdoor Unit Connection of refrigerant pipe Warning

Installation Precedure

Outdoor Unit

4.Connection of refrigerant pipe Warning

During installation, if refrigerant leakage occurs, ventilation measures must be taken. When refrigerant meets with fire, hazadous gas will be produced.

After installation, make sure that there is no refrigerant leakage. Refrigerant, if meeting with heaters and stoves, ect. in the room, may produce hazardous gas.

Connection of refrigerant pipe

(1)The joints of the refrigerant pipe are inside the unit. Take off the access hole cover in front of the unit.

(2)The pipe can be connected from the front or bottom of the outdoor unit. (3)Remove the L-shaped pipe from the valve by welding and connect the

accessory pipe to the valve.

(4)In the case of front connection, cut the accessory pipe at the height of the fixing panel. Then join the pipe with an elbow and let it go through the fixing panel. For the convenience of maintenance, bend the pipe down (once) and then connect pipe to the right or left.

(5)In the case of bottom connection, join the pipe with accessory pipe through the holes in the base plate of the outdoor unit, and connect pipe the left or right or the back.

Tube fixing

panel

M6

M4

Base plate

Access hole cover

Tube

to

the

back

the

tight

to

Tube

tight

to

the

Tube

left

the

the

left

to

to

Tube

Tube

(6)During welding, the gas pipe valve must be cooled down with a wet cotton cloth.

(7)The maximum connnection pipe is 50 meters, the maximum drop difference between indoor unit and outdoor unit is 30 meters.

(8)It should install the liquid check-ring and accumulator according to the outdoor unit and indoor unit position.(see the following figures)

Fig.1 Outdoor unit below the indoor unit. Fig. 2 Outdoor unit is above the indoor unit

Liquid check-ring

indoor unit

outdoor unit

outdoor unit

Accumulator ( a set per 6 meters)

indoor unit

During welding of the distribution pipe

(1).In case of brazing weld of joint, nitrogen must be filled in the pipe to prevent oxidization.

(2).The refrigerant pipe should be newly-made and clean. During installation, do not let water and other substance into the pipe.

(3).Use two spanners to tighten the connecting nut. One spanner will make loose connection.

(4).The torque moment should conform to the specified value. (Refer to the below) Torque moment for tightening the nut

Tube diameter (mm)	Torque moment for	Torque moment for
	pre-installation (N.m)	tightening up (N.m)
12.70	49.0(5.0kgf.m)	53.9(5.5kgf.m)

5. Outdoor unit pipelines connection

According to the pipeline connection method, connect the distribute pipes and inlet & outlet liquid pipes.

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