CHUNLAN -B, Руководство по обслуживанию

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Typical case analysis
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Solution: (1) Use canvas flexible connection for sealing between return air duct and air
delivery port so that good circulation of indoor air is permitted.
(2) Adjust guide damper in air delivery hose of each room so that air delivery in each room is
basically equal. After correction, room temperature dropped from 29
℃
to 25
℃
.
Case XI: 9 sets of FR260/S and 3 sets of FR180/S air conditioners were installed in an office
building. Installation personnel found during commissioning that indoor noise was too high
and beyond the level acceptable by user.
Analysis: (1) In installation, instruction manual requirement was not followed in fixing of
indoor unit by angle steel at bottom;
(2) Flexible connection was not used between return air box and static pressure box.
Solution: (1) Follow instruction manual to transform the installation, i.e. use angle steel to fix
indoor unit at bottom and add damping measures.
(2) Use canvas flexible connection between return air box and static pressure box;
(3) Increase length of return air duct; noise was apparently reduced.
Case XII: One set of FR100/S air duct type air conditioner was in a hairdressing center. User
complained about poor cooling and heating effect.
Analysis: (1) There were a total of 3 air delivery ports: one was too near and the other two had
small delivery speed;
(2) Incorrect air delivery angle.
Solution: (1) Change air delivery port area of the first port from 30
×
30mm
2
to 10
×
10mm
2
to reduce air delivery amount and increase air speed.
(2) Change area of the other 2 ports from 20 × 80mm
2
to 20 × 60mm
2
to apparently increase
air speed;
(3) Change air delivery grating angle.
Case XIII: An installation company installed 12 sets of FR125/S air duct type air conditioners.
Main units were installed in office area and user complained of high noise preventing work.
Analysis: Flexible connection was not used for air delivery/return box, cross sectional areas of
return air box and static pressure box were small, and silencing measure was taken inside.
Solution:
(1) Remove return air box and adopt ceiling natural air return;
(2) Increase cross sectional area of static pressure box, adopt flexible connection between
static pressure box and main unit, and use sagging sponge in static pressure box to reduce
noise;
(3) Re-fix main unit as follows: Use 2 pieces of 4 × 40 angle steels for fixing at bottom. Add
wood plate (15mm thick) on these angle steels and stick PE plates (10mm thick) on such
wood plate. Size of wood plate and PE plate shall be the same as that of indoor unit bottom