[When replacing normal as well as troubled compressor] - applicable to MMY-MAP0726∗
<Remove the normal compressor>
• Remove the normal compressor in the same way as the troubled
compressor. Note:
• Be sure to insulate the removed compressor leads using insulation tape, etc.
WARNING
When detaching a pipe by heating with a burner at brazed joint, take care as any oil left in the piping may burn in
a momentary flash of fire when the brazing filler metal melts.
<Measuring amount of oil in normal compressor>
• As was the case with the troubled compressor, measure the amount of oil contained by placing the compressor
on a scale.
Amount of oil in normal compressor: B [gal] = (Weight of compressor as it was dismantled (lbs) - D) × 0.1249
(Specific volume of oil: 0.1249 [gal/lbs])
Note:
(lbs)
Compressor model
DA421A3TB-20M1 48.2
※Please check the type name of the compressor as it was dismantled.
<Adjusting amount of oil in new compressors>
• Perform the adjustment on the basis of how much oil the troubled compressor contained, A [gal], and how
much oil the normal compressor contained, B [gal], by following the steps below.
1 Combined amount of oil in troubled and normal compressors A+B [gal] : 0 ≤ A+B < 0.528
(1) Adjust the amount of oil in the two new compressors to 0.264 gal each (total 0.528 gal).
• Lay the compressors down and draw 0.238 [gal] of oil from each of them via their oil equalization pipes.
Notes:
• Do not draw more than 0.238 [gal] of oil from a compressor as it may cause damage.
• If the troubled compressor contained 0.132 gal or less, there may have been a problem with the oil
equalization circuit, etc. Perform checks in accordance with “12-3. Check Procedure to Search Cause of
Compressor Oil Shortage”.
2 Combined amount of oil in troubled and normal compressors A+B [gal]:
0.528 ≤ A+B < 1.004
(1) Adjust the amount of oil in the two new compressors to (A+B)/2 gal each.
• Lay the compressor down and draw [1.004-(A+B)]/2 [gal] of oil from each of
them via their oil equalization pipes.
3 Combined amount of oil in troubled and normal compressors
A+B [gal]:
3800 ≤ A+B
(1) Adjust the amount of oil in the two new compressors to (A+B)/2 cc each.
(Insert a hose into the discharge pipe or oil equalization pipe of each
compressor and inject (A+B)/2-0.520 [gal] of oil using a funnel, etc.)
Compressor
Ｄ：Weight
(not include oil）
− 232 −
To Next Page
Loading...
