Haier HSU-18RM03/R2 Installation of Outdoor Unit, Connection of pipes, Attaching Drain-Elbow

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Indoor unit	L	POWER
	N
	Outdoor unit

Power cable: 3G2.5mm2

Connecting wiring: 6G0.75mm

HSU-22HEA03 /R2

HSU-22HRA03/R2

Outdoor unit

1Installation of Outdoor Unit

Install according to Drawing for the installation of indoor and outdoor units

2Connection of pipes

●To bend a pipe, give the roundness as large as possible not to crush the pipe , and the bending radius should be 30 to 40 mm or longer.

●Connecting the pipe of gas side first makes working easier.

●The connection pipe is specialized for R410A.

Half union	Flare nut	Forced fastening without careful centering may
		damage the threads and cause a leakage of gas.
		Pipe Diameter(ǿ)	Fastening torque
		Liquid side6.35mm(1/4")	18N.m
		Liquid/Gas side9.52mm(3/8")	42 N.m
		Gas side 12.7mm(1/2")	55N.m
Spanner	Torque wrench	Gas side 15.88mm(5/8")	60 N.m

Be careful that matters, such as wastes of sands, etc. shall not enter the pipe. The standard pipe length is 5m. If it is over 7m, the function of the unit will be

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1(L) 2(N)

Indoor unit

1(L)

2(N)

affected. If the pipe has to be lengthened, the refrigerant should be charged, according to 20 g/m. But the charge of refrigerant must be conducted by profes- sional air conditioner engineer. Before adding additional refrigerant, perform air purging from the refrigerant pipes and indoor unit using a vacuum pump,then

charge additional refrigerant.

CAUTION

Outdoor unit

Outdoor unit

B

Indoor unit

Power cable: ≥3G2.5mm2

Connecting wiring: ≥3G1.5mm 2 (For: L N )+2x0.75mm2

HSU-18RM03/R2

HSU-18HEA03/R2-I

HSU-18HRA103/R2

1. If the supply cord is damaged, it must be replaced by the manufacturer or its

service agent or a similar qualified person. The type of connecting wire is

H05RN-F or H07RN-F.

2. If the fuse on PC board is broken please change it with the type of

T. 3.15A/250V.

Outdoor unit

Outdoor unit

A

B

A

Oil trap

Indoor unit

B

AIndoor unit

●Max.Elevation: Amax=15m

●In case the elevation A is more than 5m, oil trap shoud be installed every 5~7m

●Max. Length: Bmax=25m

●In case the pipe length B is more than 7m, the refrigerant should be charged, according to 20 g/m.

3. The wiring method should be in line with the local wiring standard.

4. After installation, the power plug should be easily reached.

5. A breaker should be incorporated into fixed wiring. The breaker should be

all-pole switch and the distance between its two contacts should be not less

than 3mm.

3Connection

●Use the same method on indoor unit. Loosen the screws on terminal block and insert the plugs fully into terminal block, then tighten the screws.

●Insert the cable according to terminal number in the same manner as the indoor unit.

●If wiring is not correct, proper operation can not be carried out and controller may be damaged.

●Fix the cable with a clamp.

4Attaching Drain-Elbow

●If the drain-elbow is used,

please attach it as figure. (Note: Only for heat pump unit.)

5Purging Method:To use vacuum pump

1.Detach the service port’s cap of 3-way valve, the valve rod’s cap for 2-way valve and 3-way’s, connect the service port into the projection of charge hose (Iow) for gaugemanifold. Then connect the projection of charge hose (center) for gau- gemanifold into vacuum pump.

2.Open the handle at Iow in gaugemanifold, operate vacuum pump. If the scale- moves of gause (Iow) reach vacuum condition in a moment, check 1. again.

3.Vacuumize for over 15min.And check the level gauge which should read -0.1MPa (76 cm Hg) at Iow pressure side. After the completion of vacuumizing, close the

handle ‘Lo’ in gaugemanifold and stop the operation of the vacuum pump. Check condition of the scale and hold it for 1-2min. If the scale-moves back in spite of

tightening, make flaring work again, the return to the beginning of 3 .

4.Open the valve rod for the 2-way valve to an angle of anticlockwise 90 degrees.

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