CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE

10.4.6. Brazing

As brazing requires sophisticated techniques and experiences, it must be performed by a qualified person.

In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting dry nitrogen gas (N2) flow.

<Brazing Method for Preventing Oxidation>

1.Attach a reducing valve to the nitrogen gas cylinder.

2.Apply a seal onto the clearance between the piping and inserted pipe for the nitrogen gas in order to prevent the nitrogen gas from flowing backward.

3.When the nitrogen gas is flowing, be sure to keep the piping end open.

4.Adjust the flow rate of nitrogen gas so that it is lower than 0.05 m3/h, or 0.02 MPa (0.2 kgf/cm2) by means of the reducing valve.

5.After taking the steps above, keep the nitrogen gas flowing until the piping cools down to a certain extent (i.e. temperature at which pipes are touchable with finger).

6.Completely remove the flux after brazing.

Fig. 14 Prevention of Oxidation during Brazing

Cautions during brazing

1.General Cautions

a.The brazing strength should be high as required.

b.After operation, airtightness should be kept under pressurized condition.

c.During brazing do not allow component materials to become damaged due to overheating.

d.The refrigerant pipe work should not become blocked with scale or flux.

e.The brazed part should not restrict the flow in the refrigerant circuit.

f.No corrosion should occur from the brazed part.

2.Prevention of Overheating

Due to heating, the interior and exterior surfaces of treated metal may oxidize. Especially, when the interior of the refrigerant circuit oxidizes due to overheating, scale occurs and stays in the circuit as dust, thus exerting a fatally adverse effect. So, make brazing at adequate brazing temperature and with minimum of heating area.

3.Overheating Protection

In order to prevent components near the brazed part from overheating damage or quality deterioration due to flame or heat, take adequate steps for protection such as (1) by shielding with a metal plate, (2) by using a wet cloth, and (3) by means of heat absorbent.

4.Movement during Brazing

Eliminate all vibration during brazing to protect brazed joints from cracking and breakage.

5.Oxidation Preventative

In order to improve the brazing efficiency, various types of antioxidant are available on the market. However, the constituents of these are widely varied, and some are anticipated to corrode the piping materials, or adversely affect HFC refrigerant, lubricating oil, etc. Exercise care when using an oxidation preventive.

10.4.7. Servicing Tips

The drier must also be replaced whenever replacing the refrigerant cycle parts. Replacing the refrigerant cycle parts first before replacing the drier. The drier is supplied in a vacuum pack. Perform brazing immediately after opening the vacuum pack, and then start the vacuum within two hours. In addition, the drier also needs to be replaced when the refrigerant has leaked completely. (Applicable for drier models only)

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Philips CS-E15DB4EW specifications Servicing Tips, Brazing Method for Preventing Oxidation
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CS-E15DB4EW specifications

The Philips CS-E15DB4EW is an exceptional air conditioner that exemplifies modern cooling technology while emphasizing energy efficiency and user comfort. This model is designed to provide reliable performance in various settings, making it suitable for both residential and light commercial applications.

One of the standout features of the Philips CS-E15DB4EW is its powerful cooling capacity. With a cooling power reaching up to 15000 BTUs, this air conditioner is capable of effectively cooling medium to large-sized rooms. This high capacity ensures that users enjoy a refreshingly cool environment, even during the hottest summer months.

Energy efficiency is a prominent characteristic of the CS-E15DB4EW. It features an advanced inverter technology that optimizes power consumption while maintaining the desired temperature. This technology not only results in lower electricity bills but also reduces environmental impact by minimizing energy waste. The air conditioner boasts a high EER (Energy Efficiency Ratio), making it a responsible choice for energy-conscious consumers.

In terms of convenience, the CS-E15DB4EW is equipped with a user-friendly remote control, allowing users to adjust settings from a distance. This includes temperature adjustments, fan speed settings, and timer functions, providing flexibility and comfort at the users' fingertips. Additionally, the air conditioner features various operating modes, including cool, dry, and fan modes, catering to diverse climatic conditions and individual preferences.

Another remarkable characteristic of the Philips CS-E15DB4EW is its quiet operation. With a noise level as low as 30 dB, this unit ensures that users can enjoy a peaceful environment without the disruptive sounds typical of standard air conditioning units. This feature is particularly beneficial for bedrooms or study areas where concentration or relaxation is crucial.

Moreover, the unit is designed with a sleek, modern aesthetic that seamlessly integrates into any interior decor. The easy-to-clean filters and compact design contribute to its practicality, allowing for efficient maintenance and longevity.

In conclusion, the Philips CS-E15DB4EW stands out as a versatile, efficient, and user-friendly air conditioning solution. With its powerful cooling capacity, energy-saving technologies, convenient features, and quiet operation, it effectively addresses the cooling needs of various environments. Whether for residential use or light commercial applications, this model is designed to provide a comfortable atmosphere while being mindful of energy consumption and environmental impact.
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