CVHH-SVX001A-EN 39
Insulation
Unit Insulation Requirements
Factory-installed insulation is available as an option for all
units. Factory installation does not include insulation of
the chiller feet; if required, insulation for chiller feet is
provided by others. In applications where the chiller is not
factory-insulated, install insulation over the areas outlined
and highlighted with dashed lines as shown in
Figure 25,
p. 40
.
Insulate all 6.35-mm (1/4-in.) eductor lines, one from the
suction cover and one from the evaporator to prevent
sweating.
The quantities of insulation required based on unit size
and insulation thickness are listed in Tab l e 10. Insulation
thickness is determ ined at normal design conditions w hich
are:
• standard comfort-cooling leaving chilled water
temperature
• 29.4°C (85°F) dry bulb ambient temperature
• 75 percent relative humidity
Operation outside of normal design conditions as defined
above may require additional insulation; contact Trane for
further review.
Note: If the unit is not factory-insulated: install insulation
around the evaporator bulbwells and ensure that
the bulbwells and connections for the waterbox
drains and vents are still accessible after insulation
is applied. The sensor modules (LLIDs) and
interconnecting four wire cable (IPC bus) must be
raised up above the field-installed insulation.
Secure the IPC bus to the insulation top/outer
surface after insulation is completed.
Important: Do not insulate the motor housing, unit
wiring, or sensor modules.
Insulation Thickness
Requirements
Factory applied insulation. All low-temperature
surfaces are covered with 19.05 mm (3/4 in.) Armaflex
®
II
or equal (thermal conductivity = 0.036 W/m
2
-K
[0.25 Btu/h-ft
2
]), including the evaporator, waterboxes,
suction elbow, economizer, and piping.
The insulation is Armaflex or equivalent closed cell
elastomeric insulation to prevent the formation of
condensation in environments with a relative humidity up
to 75%. Chillers in high humidity areas or ice storage, low
leaving water temperature (less than 2.2°C [36°F] chilled
water temperature/glycol) units may require double
thickness to prevent formation of condensation.
Table 10. CVHH evaporator insulation requirements
EVSZ
( Standard Unit)
19 0.5 mm ( 3/ 4 in.) I nsulation
m
2
ft
2
100M 61.4 661
100L 63.2 680
130M 63.5 684
160M 66.1 711
200M 68.6 738
200L 71.1 765
220M 71.5 770
220L 74.2 799
Notes:
1 . Units are NOT insulated on the motor or refrigerant drain lines.
2 . 19.05-mm (3/ 4-in.) sheet insulation is installed on the evaporator,
evaporator waterboxes, suction elbow, suction cover, economizer,
liquid lines, and piping.
3 . Copper oil eductor lines require pipe insulation.
NOTICE:
Insulation Damage!
To prevent damage to factory installed insulation:
• Do not allow the insulation to be exposed to
excessive sunlight. Store indoors or cover with
canvas to prevent exposure.
• Do not use thinners and solvents or other types of
paint. Use only water base latex.
Failure to follow these instructions could result in
insulation damage.
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