664854
136
Zoom out
Zoom in
Previous page
1/144
Next page
-
133
-
* Cautions during brazing
1 General cautions
1) The brazing strength should be high as required.
2) After operation, airtightness should be kept under a pressurized condition.
3) During brazing do not allow component materials to become damaged due to overheating.
4) The refrigerant pipe work should not be come blocked with scale or flux.
5) The brazed part should not restrict the flow in the refrigerant circuit.
6) 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 a 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 preventive
In order to improve the brazing efficiency, various types of antioxidant are available on the market. However, the con-
stituents 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.
8.3 Installation, removal and servicing
8.3.1 Tools for R410A
In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service
port diameter of the outdoor unit control valve (3-way valve) has been changed. Also, to increase the pressure resisting strength,
flare processing dimensions and sizes of opposite sides of flare nuts (for copper pipes with nominal diameters 1/2 and 5/8) have
been changed. During installation/service, therefore, prepare tools exclusive for R410A shown in (1) on page 134 and general tools
shown in (2) on page 135.
Fig.5 Prevention of oxidation during brazing
Flow meter
Stop valve
Reducing
valve
Piping
Rubber plug for sealing
From the nitrogen cylinder
Nitrogen gas
Nitrogen gas
M
136


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Mitsubishi SKM20ZG-S at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Mitsubishi SKM20ZG-S in the language / languages: English as an attachment in your email.

The manual is 6,72 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Mitsubishi SKM20ZG-S

Mitsubishi SKM20ZG-S User Manual - German - 24 pages

Mitsubishi SKM20ZG-S User Manual - Dutch - 24 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info