INSTALLATION MANUAL FOR INDOOR UNIT

4. Installation of indoor unit

M10 nut

Fix the indoor unit to the hanger bolts.

If required, it is possible to suspend the unit to the beam, etc.

Directly by use of the bolts without using the hanger bolts.

Main unit

Note

Hanging bolt M10 washer

M10 spring washer

When the dimensions of main unit and ceiling holes does not match, it can be adjusted with the slot holes of hanging bracket.

Adjusting to the levelness

(a)Adjust the out-of levelness using a level or by the following method.

Make adjustment so that the relation between the lower surface of the unit proper and water level in the hose becomes as given below.

Piping side Supply water

Water level

0~5 mm

PVC hose

 

(0~0.2")

Bring the piping side slightly lower.

(b)Unless the adjustment to the levelness is made properly, malfunctioning or failure of the float switch may occur.

5.Drain Piping

(a)Drain piping should always be in a downhill grade (1/50~1/100) and avoid riding across an elevation or making traps.

Good piping

Suspension

1.5m ~ 2m

bolts

Heat

A downhill grade

insulation

of 1/100 or more

Inproper piping

 

 

Avoid riding across an elevation

Air vent

Keep free from traps

 

Do not pipe under water

(b)When connecting the drain pipe to unit, pay suffcient attention not to apply excess force to the piping on the unit side. Also, fix the piping at a point as close as possible to the unit.

(c)For drain pipe, use hard PVC general purpose pipe VP-25(I.D.1") which can be purchased locally. When connecting, insert a PVC pipe end securely into the drain socket before tightening securely using the attached drain hose and clamp. Adhesive must not be used connection of the drain socket and drain hose (accessory).

 

Stage

 

Drain socket

difference

Drain hose

part

 

Drain socket

 

VP 25 joint

 

 

 

Pipe cover(large)

(field purchased)

 

[for insulation]

 

Main unit

(accessory)

 

 

 

 

 

Drain hose

VP 25

 

(field purchased)

 

Clamp (accessory)

 

(accessory)

Adhesion

Pipe cover

 

 

 

Pipe cover(small)

 

[for insulation]

 

 

(field purchased)

 

[for insulation]

 

 

 

 

 

(accessory)

 

 

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Haier HDU-42H03/H, HDU-24H03/H, HDU-28H03/H instruction manual Drain Piping, Installation of indoor unit
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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.

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