Haier HSU18XH7-G Service Manual - Page 47

Power cable: 3G1.0mm 3G1.0mm Indoor unit Outdoor unit HSU-07HEK13/R2 Power cable: 3G1.0mm 3G1.0mm 1(L) 2 (N) Indoor unit Outdoor unit HSU-09HEK13/R2 HSU-12HEK13/R2 Power cable: 3G1.5mm 3G2.0mm Indoor unit Outdoor unit HSU-18HEK13/R2 Power cable: 3G2.5mm 4G0.75mm Indoor unit HSU-24HEK13/R2 Outdoor unit HSU-18 24HEK13/R2 Outdoor unit Installation of Outdoor Unit Installations Install according to Drawing for the installation of indoor and outdoor units Connection 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 rst 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. Spanner Pipe Diameter( ) 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 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 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 professional 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 B Indoor unit A B A Indoor unit Outdoor unit Outdoor unit B A Oil trap Indoor unit Max.Elevation: Amax=10m In case the elevation A is more than 5m, oil trap shoud be installed every 5~7m Max. Length: Bmax=15m In case the pipe length B is more than 7m, the refrigerant should be charged, according to 20 g/m. 1. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similar quali ed 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. 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 xed wiring. The breaker should be all-pole switch and the distance between its two contacts should be not less than 3mm. Connection 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. Attaching Drain-Elbow If the drain-elbow is used, please attach it as gure. (Note: Only for heat pump unit.) Purging 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 gaugemanifold 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 aring 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. After 6 seconds, close the 2-way valve and make the inspection of gas leakage. 45