Haier HDU-24H03/H, HDU-42H03/H, HDU-28H03/H Refrigerant piping, Outline piping, Piping size

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INSTALLATION MANUAL FOR OUTDOOR UNIT

4. Refrigerant piping

Flare connection

Check joint

 

Gas pipe

Service valve

 

 

 

 

(1)

Outline piping

Indoor

Outdoor

 

 

 

unit

unit

(2)

Piping size

 

Liquid

 

 

pipe

Flare connection

 

Model

HDU-42H03/H

HDU-24H03/H

 

 

HDU-28H03/H

 

 

 

 

 

 

Gas piping

19.05(3/4")x1.0mm

15.88(5/8")x1.0mm

0.5

 

Liquid piping

9.52(3/8")x0.8mm

9.52(3/8")x0.8mm

 

90 +

 

Install the removed flared nuts to the pipes to be connected,

 

 

then flare the pipes.

(3) Limitations for one way piping length and vertical height difference.

One way piping length: less than 30m (HDU-24H03/H ,HDU-28H03/H). less than 50m (for HDU-42H03/H).

Vertical height difference: Less than 15m (for HDU-24H03/H ,HDU-28H03/H). less than 30m (for HDU-42H03/H).

Precautions for refrigerant piping

Do not twist or crush piping.

Be sure that no dust is mixed in piping.

Bend piping with as wide angle as possible.

Keep insulating both gas and liquid piping.

Check flare-connected area for gas leakage.

(4) Air purge

a. For HDU-24H03/H , HDU-28H03/H.

Purge air out of indoor unit and piping as shown in the Fig.

(1)Remove the valve cap on 2-way valve in outdoor unit.

(2)Loosen by 1-1.5 turn the flare nut of gas pipe, which is connected to 3-way valve.

(3)Loosen the valve rod of 2-way valve by 90 degrees (use a hexagon wrench) for about 15 seconds, air will be pushed out from flare nut on gas pipe.

(4)Open 2-way and 3-way valves using specified torque.

(5)Tighten the caps on the valves with specified torque.

(6)Conduct gas leakage using gas leakage detector or soap water.

Gas pipe

Liquid pipe 15.88mm(5/8") 9.52mm(3/8")

Flare nut

90

Note: When additional refrigerant piping is necessary, first purge air out of connecting pipe by external gas, then drive out the excessive refrigerant by purging method.

Brand new unit is charged 80g more refrigerant than spec. This is only for first installation to purgeair in the indoor unit and connecting pipe.

b. For HDU-42H03/H.

Carry out the air purge of the indoor unit and refrigerant piping by vacuuming.

Procedures:

1)Tighten all the flare nuts of the piping on the side of indoor and outdoor units so that there is no leakage.

2)Carry out vacuuming from the service valve charge port with the service valves (both liquid and gas side) of the outdoor unit fully closed.

3)After vacuuming, remove the cap nut for the valve stem, and tighten the cap nuts (cap nuts for valve stem and charge port) with service valve (both liquid and gas) fully opened.

(5)Method of opening and closing service valve of outdoor unit

1)Remove the hexagonal cap nut.

2)Operate the valve using a hexagonal wrench to open by left turn and to close by right turn.

3)Tighten the hexagonal cap nut after the piping works.

Open

Hexagon wrench (attachment)

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Contents Please read this manual carefully before using ManualTable of Contents Disposal of the old air conditioner Safety Precations It could cause such problems as water leakageSafety Precautions Make sure to use a fuse of proper electric ratingSafety Precaution Applicable ambient temperature rangeMachine is adaptive in following situation Parts and Functions HDU-24H03/HHDU-42H03/H HDU-28H03/HAir outlet Duct Drainpipe Air inlet Buttons and display of the wire controller Remote control Clock setOperation Select temp. setting RecommendationsFan speed selection Set Clock correctly before starting Timer operation Select your desired Timer mode on or OFFPress Time Follow the same procedures in Time setting for Timer on Select OffonPress Time button Cooling, dehumidifying mode Heating modeComfortable Sleep Operation Malfunction Unit fails to startCooling or heating is not sufficient Cooling is not sufficientFollowings are not malfunction Stopped. Because the protecting circuit is activatedDuring this time air conditioner operates in fan Outdoor unit during heating During defrosting operationCare and Maintenance Points to observeWarming Operation Is the Unit Installed Correctly Installation placeElectric work Installation Manual for Wire Controller Indoor unit wiring Replace the upper part of wire controllerHint Accessories Selection of the place of installationInstallation of outdoor unit InstallationRefrigerant piping Outline pipingPiping size Model To use vacuum pumpElectric wiring Wire size Switch Leak Rated capacity a Minimum5mm 30mA 0mm 30mATest run Installation Manual for Indoor Unit Safety precautionsChoose installation place Preparation before installation Installation of indoor unit Drain PipingInstallation of air suction and discharging duct Chosen chart of simple duct Shape Square duct Dimension Air volumeExamples of improper installation Air discharging fan Improper exampleOperation method of fan controller Example of the method of choosing capacity numberRefrigerant pipe

HDU-28H03/H, HDU-42H03/H, HDU-24H03/H specifications

Haier has established itself as a leading name in the HVAC sector, and their HDU series, including models HDU-28H03/H, HDU-42H03/H, and HDU-24H03/H, exemplifies the brand's commitment to quality and efficiency. These air conditioning units are ideal for both residential and commercial use, designed to provide optimal comfort without compromising on energy efficiency.

One of the standout features of the HDU series is its advanced inverter technology. This allows the units to adjust their cooling and heating output based on the current demand, ensuring that energy is used efficiently. As a result, users can expect reduced energy bills while enjoying a consistently comfortable indoor climate. The inverter system minimizes temperature fluctuations by maintaining a steady output, enhancing overall comfort.

Another notable aspect of the HDU models is their high energy efficiency ratings, often reaching levels that exceed industry standards. This is largely due to the use of R32 refrigerant, which has a lower global warming potential compared to traditional refrigerants. The incorporation of R32 not only makes these units more environmentally friendly but also helps to improve efficiency, providing effective cooling and heating performance even in extreme weather conditions.

Additionally, the HDU units boast a wide operating temperature range. They are designed to work seamlessly in a variety of climates, maintaining performance in temperatures as low as -15°C for heating and up to 50°C for cooling. This adaptability makes them a versatile choice for different geographic locations.

Quiet operation is another impressive feature of the HDU series. The indoor units are engineered to operate at whisper-quiet levels, making them ideal for bedrooms, offices, or any space where noise could be a concern. This allows users to enjoy a peaceful environment while maintaining their comfort.

The user-friendly interface and smart features of the HDU models further enhance their appeal. Equipped with modern remote controls and optional Wi-Fi connectivity, users can easily manage their air conditioning settings from anywhere, providing convenience and flexibility.

In summary, the Haier HDU-28H03/H, HDU-42H03/H, and HDU-24H03/H models combine advanced inverter technology, high energy efficiency, a wide operating temperature range, and quiet operation to deliver outstanding performance. Their smart features and eco-friendly refrigerant make them a reliable choice for those seeking comfort and efficiency in their HVAC systems.
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