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COMPRESSOR ASSEMBLY TORQUES
ITEM DESCRIPTION
TORQUE
ft-lb N•m
1* Oil Heater Grommet Nut 10 14
2 Impeller Retaining Bolt 44-46 60-62
3 Bull Gear Retaining Bolt 80-85 108-115
4 Motor Terminals (Low Voltage) 50 68
5 Demister Bolts 15-19 20-26
6* Guide Vane Shaft Seal Nut 25 34
7* Motor Terminals (High Voltage)
— Insulator 2-4 2.7-5.4
— Packing Nut 5 6.8
— Brass Jam Nut 10 13.6
LEGEND
N•m — Newton Meters
*Not shown.
*‘‘Z’’ clearance is determined by a combination of impeller diameter and shroud size. The
table lists ‘‘Z’’ clearances for each compressor code. Figure 1 shows the location (on the
chiller information plate) of the compressor code for each chiller.
COMPRESSOR
CODE
‘‘Z’’
(in.)
‘‘Z’’
(mm)
203-204 .025 0.635
223-274 .015 0.381
283-307 .025 0.635
321-377 .015 0.381
381-397 .025 0.635
410-469 .015 0.381
470-499 .025 0.635
Fig. 47 — Compressor Fits and Clearances (cont)
COMPRESSOR
CODE
‘‘Z’’
(in.)
‘‘Z’’
(mm)
516-517 .015 0.381
518-519 .025 0.635
526-527 .015 0.381
528-529 .025 0.635
536-537 .015 0.381
538-539 .025 0.635
COMPRESSOR
CODE
‘‘Z’’
(in.)
‘‘Z’’
(mm)
546-547 .015 0.381
548-549 .025 0.635
556-557 .015 0.381
558-559 .025 0.635
566-567 .015 0.381
568-569 .025 0.635
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