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V V e e n n t t P P i i p p i i n n g g
Vent Line Sizing Reference
Table 12.
"C" value used to determine rupture disk vent line sizes; for use with the following figure
Evaporator Size (EVSZ)
250E
210D
250D
250M
250X
Notes:
1.
Rupture disk diameter is 3 in. (76.2 mm).
2.
To determine the total "C" value for a specific unit, add the appropriate "C" values for the evaporator, standard condenser, and economizer. If the unit
is equipped with any options (e.g., heat recovery, free cooling or an auxiliary condenser, add the applicable "C" values to this total. With this new sum,
refer to the following figure to determine the vent-line pipe diameter.
3.
If piping multiple rupture disks to a common vent line, first determine the total "C" value for each rupture disk, then add all "C" values together and
apply the result to the following figure.
4.
RuptureGuard™ size based on "C" value:
3 in. (76.2 mm) valve: "C" value 0 to 104.20
4 in. (101.6 mm) valve: C value 104.21 to 223.9
38
Condenser Size (CDSZ)
250L
210D
250D
250M
250X
Total "C" Value
175.74
112.93
122.62
146.36
164.74
CDHF-SVX01N-EN
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