Model, To use vacuum pump | Haier HDU-42H03/H, HDU-24H03/H manual

INSTALLATION MANUAL FOR OUTDOOR UNIT

(6)Additional charge of refrigerant

Outdoor unit is precharged at a factory for the piping length up to 5m. Additional charge is not required up to 5m.

	Item	Basic	Factory charge amount		Additional	Length that	Maximum
		refrigerant	of refrigerant		charge	additional
							piping
Model		charge			amount (ii)	charge is not	length
			Outdoor unit	Indoor unit
		amount (i)			per meter	required
Heat	HDU-42H03/H	3.44	3.52	0	0.06	5m (viii)(v)	50m

pump	HDU-24H03/H	2.32	2.40	0	0.06	5m (viii)(vii)	30m

	HDU-28H03/H

Notes (i) Basic refrigerant charge amount means refrigerant amount when refrigerant piping length is 5m.

(ii)When the refrigerant piping length exceeds the length that additional refrigerant charge is not required, charge additional refrigerant based on to the calculated amount of refrigerant per unit piping length.

Example of additional charge amount calculation

Calculate the additional charge amount when the piping length is 25 m. (25 - 5 ) x 0.06 = 1.2

Additional charge amount (kg)

Additional charge amount per 1m (kg/m)

Length that additional refrigerant charge is not required (m)

Total length of the piping (one way) (m)

Additional charge amount of refrigerant =0.70kg(Calculate the amount in any case.)

If air perge with the refrigerant is forbidden at the local, please use the vacuum method (Please see the below figure)

To use vacuum pump

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 (low) for gaugemanifold. Then connect the projection of charge hose (center) for gaugemanifold into vacuum pump.

Open the handle at low in gaugemanifold, operate

vacuum pump. If the scale-moves of gause (low) 2 Open reach vacuum condition in a moment, check 1 again.

2-way valve 3-way valve

Gaugemanifold

Vacuum pump

2-way valve 3-way valve

Gaugemanifold

Vacuum pump

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

close the handle 'Lo' in gaugemanifold and stop the 3 Close operation of the vacuum pump.

Check the 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 .

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.