Refrigerant Metering Devices

1.Tubing should be cut square. Make sure it is round and free of burrs at the connecting ends. Clean the tubing to prevent contamination from entering the system.

2.Make sure that both refrigerant stop valves at the outdoor unit are closed.

3.Push the tubing into the fitting until it stops. This prevents flux from getting into the system. 4.Remove the cap and Schrader valve core from the service port to protect the valve seals. 5.Wrap a wet rag around the valve stub before brazing.

6.Braze the joints of interconnecting tubing. Flow dry nitrogen into the shutoff valve port and through the tubing while brazing.

7.After brazing quench with a wet rag to cool the joint. Reinstall the Schrader core in the valve, if removed for brazing.

8.Pressurize the lines to 150 psi maximum with dry nitrogen. Check for leaks at all joints with liquid detergent. If a leak is found, repair it after removing the nitrogen. Repeat the process and re-ckeck.

9.Do not purge the lines with refrigerant. Evacuate the lines and indoor coil.

Replace the existing indoor unit fixed orifice with the orifice supplied with the outdoor unit.

See table 4 for the fixed orifice size for each unit.

Table 4

Fixed orifice size

outdoor model	indoor model	orifice size

HR18D2VAR	HB2400VD1M20	057

HR24D2VAR	HB2400VD1M20	065

HR30D2VAR	HB3600VD1M22	071

HR36D2VAR	HB3600VD1M22	078

HR24D2VAR, HR36D2VAR, HR18D2VAR, HR30D2VAR specifications

Haier, a globally recognized brand in home appliances, has developed a line of air conditioning units that includes the HR30D2VAR, HR18D2VAR, HR36D2VAR, and HR24D2VAR models. These units are designed to deliver optimal comfort and energy efficiency for both residential and commercial spaces.

One of the standout features of these models is their advanced inverter technology. This allows the air conditioners to adjust the compressor speed according to the cooling requirements of the room. As a result, these units can cool spaces rapidly while consuming less energy compared to traditional models. The inverter technology not only contributes to energy savings but also ensures a quieter operation, making them ideal for bedrooms and workspaces.

The HR series models are equipped with multiple cooling modes, allowing users to select the most appropriate setting based on their comfort needs. Whether it's a hot summer day or a mild evening, users can tailor the temperature to their liking. Additionally, the models come with a sleep mode that gradually adjusts the temperature, providing a comfortable sleeping environment while saving energy.

Another significant characteristic of these air conditioners is their energy efficiency ratings. Many of the HR series units boast high SEER (Seasonal Energy Efficiency Ratio) ratings, indicating their effectiveness in cooling while minimizing electricity consumption. This is particularly beneficial for environmentally conscious consumers looking to reduce their carbon footprint.

Furthermore, the HR30D2VAR, HR18D2VAR, HR36D2VAR, and HR24D2VAR models incorporate robust air filtration systems designed to improve indoor air quality. These filters capture dust, pollen, and other allergens, making it an excellent choice for those with respiratory issues or allergies. Regular maintenance is also simplified, as filters can be easily accessed and cleaned or replaced.

Connectivity is another feature that enhances user experience. Many of the Haier air conditioning units in this series come with smart technology compatibility, allowing users to control their air conditioner through their smartphone or smart home systems. This remote control capability enables adjustments even when users are away from home, providing convenience and energy management.

In summary, the Haier HR30D2VAR, HR18D2VAR, HR36D2VAR, and HR24D2VAR air conditioners combine advanced technologies such as inverter operation, high energy efficiency, robust filtration systems, and smart connectivity. These features make them suitable for a variety of settings, ensuring comfort and ease of use for homeowners and businesses alike.