Refrigerant pipe | Haier HDU-24H03/H, HDU-42H03/H, HDU-28H03/H

INSTALLATION MANUAL FOR INDOOR UNIT

11. Refrigerant pipe

[The air side pipe, liquid side pipe must be faithfully heat insulated, if no heat insulation, it may cause water leakage.]

The outdoor unit has been charged with refrigerant.

When connect the pipe to the unit or dismantling the pipe from the unit, please follow the figure shown, use spanner and torque spanner together.

When connect cone nut, the inner side and outside of cone nut should paste with refrigerant oil. Use hand to twist 3-4 rings, then fasten with spanner.

Referring to Table I to confirm the fasten torque. (too tight may damage nut leading to leakage)

Check if the connection pipe leaks, then do heat insulation treatment, as below figure shown. Only use seal cushion to bind the joint part of air pipe and heat insulation parts.

Paste the refrigerant oil here

Torque spanner

Spanner

Pipe joint

Cone nut

Middle size seal cushion (accessory)

(Use seal cushion to bind the pipe joint)

Clamp

Heat insulation (accessory)

(for liquid pipe)

Heat insulation (accessory) Gas pipe (for gas pipe)

Liquid pipe

80	510
Liquid pipe	Gas pipe	Electric box
	Gas pipe	Electric box
		Upper
Air inlet			310	Air outlet
			310
Drain hose connection mouth	530	Down side	30
Drain hose connection mouth
VP25 PVC pipe

Specification of pipe	Tighten torque	Cone dimension		Cone
(mm)		A (mm)
9.52	3270~3990 N.cm	45		2
9.52	(333~407 kgf.cm)	12.0~12.4		R0.4~0.8
		12.0~12.4
		90	0.5
		90	0.5
15.88	9720~11860 N.cm			A
	9720~11860 N.cm	22.9~23.3
	(990~1210 kgf.cm)	22.9~23.3
	(990~1210 kgf.cm)

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.