Product data
Insulation
INSULATION REQUIREMENTS
COMPONENT FRAME FT
2
M
2
Cooler
1 60 5.57
2 66 6.13
4 113 10.49
Compressor
1, 2 35 3.25
4 41 3.81
Economizer
1, 2 17 1.58
4 28 2.60
Economized Liquid Lines — 21 1.95
Non-Economized Liquid Lines — 9 .84
Factory insulation (optional) — Optional factory insu-
lation is available for the evaporator shell and tube sheets,
suction pipe, motor end of compressor, economizer, and
economizer line(s). Insulation applied at the factory is
3
⁄
4
-in.
(19.0 mm) thick and has a thermal conductivity K value of
0.28 Btu · in./hr · ft
2
· °F (0.0404 W/m · °C). Insulation
conformswithUL (Underwriters’ Laboratories) Standard 94.
Classification 94HBF.
Insulation at jobsite — The optional factory insulation
package provides excellent protection against condensation
under most operating conditions. Use the relative humidity
vs dry bulb temperature graph to determine the need for
additional insulation. Plot the relative humidity vs the dry
bulb temperature. If that point falls above the evaporator
saturation temperature for your application, additional in-
sulation is required. For saturation temperatures other than
35 F (2 C) or 45 F (7 C), use interpolation to determine
additional insulation requirements. For example, if an ap-
plication has a 35 F (2 C) evaporator saturation tempera-
ture, machine room relative humidity of 80%, and dry bulb
temperature of 75 F (24 C), then additional insulation is
required.
If the machine is to be field insulated, obtain the approxi-
mate insulation areas from the Insulation Area drawing on
page 26.
Insulation of waterbox covers is made only in the field and
this information is not included in Insulation Requirements
table. When insulating the covers, allow for service access
and removal of covers.
CONDITIONS FOR ONSET OF CONDENSATION
WITH OPTIONAL INSULATION PACKAGE*
90%
80
70
60
50
40
70 (21)
75 (24)
80 (27)
85 (29)
90 (32)
95 (35)
DRY BULB TEMPERATURE IN DEGREES F (DEGREES C)
RELATIVE HUMIDITY %
45 F (7 C) EVAPORATOR
35 F (2 C) EVAPORATOR
100 (38)
*If the optional insulation package is not used, refer to a psychro-
metric chart to determine the onset of condensation.
25