Fujitsu AOTG36LATT, Руководство по обслуживанию

Страница: 177 / 264

1.Installation (Space)
That the installation of pipe-work shall be kept to a minimum.
That pipe-work shall be protected from physical damage.
That compliance with national gas regulations shall be observed.
That mechanical connections shall be accessible for maintenance purposes.
In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.
When disposing of the product is used, be based on national regulations, properly processed.
2.Servicing
2-1.Service personnel
Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate
from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in
accordance with an industry recognised assessment specification.
Servicing shall only be performed as recommended by the equipment manufacturer.
Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision
of the person competent in the use of flammable refrigerants.
Servicing shall be performed only as recommended by the manufacturer.
2-2. Work
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that
the risk of ignition is minimised. For repair to the refrigerating system, the precautions in 2-2 to 2-8 shall be complied
with prior to conducting work on the system.
Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour
being present while the work is being performed.
All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out.
Work in confined spaces shall be avoided.
The area around the workspace shall be sectioned off.
Ensure that the conditions within the area have been made safe by control of flammable material.
2-3.Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician
is aware of potentially flammable atmospheres.
Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non sparking,
adequately sealed or intrinsically safe.
2-4.Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate
fire extinguishing equipment shall be available at hand.
Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
04-01
4-1. Installation Work and Servicing Safety
There are no special safety precautions for R32. However, like R410a and R22,
improper installation and servicing can cause serious accidents.
Therefore always observe the following safety warnings.
WARNING
Since the working pressure is 1.6 times higher than that of refrigerant R22 models,
some of the piping and installation and service tools are special.
Especially, when replacing a refrigerant R22 model with a new refrigerant R32 model,
always replace the conventional piping and flare nuts with the R32 and R410A piping
and flare nuts on the outdoor unit side.
For R32 and R410A, the same flare nut on the outdoor unit side and pipe can be used.
Models that use refrigerant R32 and R410A have a different charging port thread diameter
to prevent erroneous charging with refrigerant R22 and for safety. Therefore, check
beforehand. [The charging port thread diameter for R32 and R410A is 1/2 inch.]
Be more careful than R22 so that foreign matter (oil, water, etc.) does not enter the piping.
Also, when storing the piping ,securely seal the opening by pinching, taping, etc. (Handling
of R32 is similar to R410A.)
CAUTION