F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
2 - I
NSTALLATION
PAGE 2-4
4.
Measurements for flatness are to be taken on the top surface of both sides of
the frame rails at each anchor bolt or for frames with pairs of anchor bolts
between each pair of anchor bolts, with top covers and gaskets removed (see
Figure 2-1). Readings between any two adjacent points are to be within .002 in.
(0.05 mm). The total accumulated out of plane flatness for proper alignment is to
be within the flatness tolerances listed in Table 2-1.
5.
In preparation for frame plane measurements be sure that the compressor
frame hold down bolting is properly installed and tightened. Either remove or
reposition the top cover(s) and gasket(s) to expose the frame's top-cover-
mounting surface. With new unit installations it is recommended that the frame
plane be initially checked prior to the guide feet being shimmed and after the ini-
tial rough coupling alignment. On KBB:V/6, or other model compressors shipped
disassembled, the initial check can be carried out prior to the guide & cylinder
assemblies being installed. Take the appropriate corrective shimming, or other
height adjustment, action to have the top-cover-mounting surface fall within the
specified plane tolerance. Subsequent reading should be taken and recorded
after the guides and cylinders have been fully installed and then again after any
vessels have been installed and shimmed. Corrective action is to be taken if
guide, cylinder and/or vessel installation results in the frame top rail measure-
T
ABLE
2-1 T
OP
-C
OVER
-M
OUNTING
S
URFACE
- F
LATNESS
T
OLERANCE
COMPRESSOR FRAME
A
a. Underlined frames are required to use both top plane flatness and soft foot
checks.
TOLERANCE FOR ALIGNMENT
INCHES
(mm)
JGM:N:P:Q/1/2, JG:A/2/4, JGR:J/2
0.004
(0.10)
JGA/6, JGR/4, JGJ/4/6, JGH:E:K:T/2/4,
JGC:D/2/4, JGU:Z/2/4, JGB:V/4, KBB:V/4
0.006
(0.15)
JGE:K:T/6, JGC:D/6, JGU:Z/6, JGB:V/6,
KBB:V/6
0.008
(0.20)
Take Measurements Here
F
IGURE
2-1 F
LATNESS
C
HECK
L
OCATIONS
- T
YPI
-