Table 16: Chiller hardware torque values
Torque value
Location
YVAM
model
Description
P/N
SAP
Quantity
lb·ft
N•m
Mod A
021-33185-090
731065
Suction line flange at
compressor
Mod B
M24 X 3 / 90 mm long
021-35824-090
5402072
12
230
312
Mod A M20 X 2.5 / 70 mm
long
021-33184-070
731064
8
Discharge line flange at
compressor
Mod B M20 X 2.5 / 90 mm
long
021-35824-090
5402049
12
150
204
Liquid line shutoff valve inlet
flange
All
M16 X 2 / 60 mm long 021-35816-060
5399748
4
55
75
Liquid line shutoff valve outlet
flange
All
5/8 UNC 3.75 in. long 021-32310-030
555972
4
65
89
Liquid line variable orifice
butterfly valve flanges
All
5/8 UNC Stud 5.5 in.
long
021-12760-000
729652
8
45
61
Compressor mounting feet at
compressor
All
M20 X 2.5 / 60 mm
long
021-33184-060
731063
4
441
598
Compressor mounting feet at
unit base
All
3/8 UNC / 1.5 in. long 021-19305-024
564228
8
43
59
Refrigerant tubing reassembly
Use the following procedures to reassemble the chiller refrigerant piping.
Assembly of straight thread O-ring port fittings
The male and female ends of SAE and ISO 6149 straight thread O-ring ports have UN/UNF or metric
straight threads. An elastomeric O-ring is fitted to the male end. During assembly, the O-ring is
firmly sandwiched between the angular sealing surface of the female port and the shoulder of the
male end. As a result, sealing is affected and maintained by the O-ring compression, which results
from the clamping force generated by tightening. The straight threads do not offer sealing action,
but they provide the resistance, or holding power, for service pressure.
Figure 39: Adjustable end fitting
Callout Description
A
Locknut
B
Back-up washer
C
O-ring
YVAM Air-Cooled Centrifugal Liquid Chiller
42