Carrier 17, Руководство по запуску и эксплуатации, Страница: 75 / 116

Assembled Couplings — If there is room on the shaft be-
tween coupling and component to clamp a sturdy bracket,
the arrangement illustrated in Fig. 43 may be used. The clamps
must have room to rotate with the shaft.
This method is quicker because the couplings do not have
to be disassembled. In addition, eccentricity or coupling face
runout are not problems since both shafts rotate together.
When using brackets, the diameter in the alignment for-
mula (see Near Final Alignment, Connecting Angular Mis-
alignment section) will be that of the circle through which
the dial indicator rotates.
1. Shut down the machine.
2. With machine at operating temperature, quickly install
brackets.
3. Check that alignment is within .002 TIR and .00033 per
in. of traverse across the diameter of measurement. Ad-
just alignment as required. (Refer to Near Final Align-
ment section.)
4. Remove brackets and run machine until operating tem-
perature is again reached.
5. Recheck the alignment per steps 1 through 4 until it re-
mains within the specified tolerances.
Be sure that coupling guards are replaced after these checks.
DOWELING
Techniques — After hot alignment check has been com-
pleted, the compressor, gear and drive must be doweled to
their soleplates. Doweling permits exact repositioning of com-
ponents if they have to be moved.
1. Doweling must be completed with equipment at maxi-
mum operating temperature (full load).
2. Use no. 8 taper dowels to dowel compressor, gear and
drive to the base. Use a 13 ⁄
32
-in. drill and no. 8 taper reamer
with straight flutes. Drill pilot hole and then expand the
pilot hole to final dimension.
3. Fit dowel so that
1
⁄
16
-in. of taper is left above the equip-
ment foot. If dowel holes are rereamed as a result of re-
alignment, be sure dowels are tight and do not bottom.
4. Place dowels as nearly vertical as possible.
5. Coat the dowels with white lead or other lubricant to pre-
vent rusting.
6. Tap dowel lightly into position with a small machinist’s
hammer. A ringing sound will indicate proper seating.
Dowel the suction end of the compressor base, the two
feet at the high speed end of the gear, and the drive feet in
accordance with the drive manufacturer’s instructions. The
number of dowels used in the drive is usually four, but some
manufacturers require more.
WEEKLY MAINTENANCE
Check the Lubrication System —
Mark the oil level
on the reservoir sight glass, and observe the level each week
while the machine is shut down.
If the level goes below the lower sight glass, the oil re-
claim system will need to be checked for proper operation.
If additional oil is required, add oil as follows:
On hermetic machines, add oil through the oil drain charg-
ing valve (Fig. 3, Item 26.) A pump is required for adding oil
against refrigerant pressure. On open-drive machines, oil may
be added through the oil drain and charging valve (Fig. 2,
Item 18) using a pump. However, an oil charging elbow on
the seal-oil return chamber (Fig. 6) allows oil to be added
without pumping. The seal oil return pump automatically trans-
fers the oil to the main oil reservoir. A pump is required for
adding oil against refrigerant pressure. The oil charge is ap-
proximately 15 gallons (57 L) for EX and FA (size 421-469)
style compressors; 20 gallons (76 L) for EA (size 531-599)
style compressors. The added oil must meet Carrier’s speci-
fications. Refer to Changing Oil Filter and Oil Changes sec-
tions. Any additional oil that is added should be logged by
noting the amount and date. Any oil that is added due to oil
loss that is not related to service will eventually return to the
sump, and must be removed when the level is high.
Fig. 43 — Alignment Check — Assembled Coupling
75