Installation manual

8 Magnitude™ Frictionless Centrifugal Chillers – Model WMC IM 1029-2
!
CAUTION
Tower water treatment is essential for continued efficient and reliable unit operation. If
not available in-house, competent water treatment specialists should be contracted.
Field Insulation
If the optional factory-installation of thermal insulation is not ordered, insulation should be field installed to
reduce heat loss and prevent condensation from forming. Insulation should cover
• The evaporator barrel, tube sheet, and water heads.
• The suction line from the top of the evaporator to the compressor inlet flange.
• The compressor support brackets welded to the evaporator.
• The liquid line from the expansion valve outlet to the evaporator inlet.
Insulation is UL recognized (File # E55475). It is 3/4" thick ABS/PVC flexible foam with a skin. The K
factor is 0.28 at 75°F. Sheet insulation is fitted and cemented in place forming a vapor barrier, then painted
with a resilient epoxy finish that resists cracking.
The insulation complies to or has been tested in accordance with the following:
ASTM-C-177 ASTM-C-534 Type 2 UL 94-5V
ASTM-D-1056-91-2C1 ASTM E 84 MEA 186-86-M Vol. N
CAN/ULC S102-M88
Approximate total square footage of insulation surface required for individual packaged chillers is tabulated
by evaporator code and can be found below.
Table 1, Insulation Quantity
WMC Model
Evaporator
Code
Insulation
Area
sq. ft. (m
2
)
145S,
E2209
66 (6.1)
145D
E2209
66 (6.1)
150D E2212
90 (8.3)
250D
E2609
76 (7.1)
290D E2612
102 (9.4)
400D E3012
114 (11)
Figure 4, Tower Bypass, Cold
Weather Operation
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Figure 3, Tower Bypass, Mild
Weather Operation
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