Vent Line Sizing Reference - Trane CVHE Installation, Operation And Maintenance Manual

Vent Line Sizing Reference

Table 12. "C" values used to determine rupture disk
vent line sizes; for use with the following
figure
"C" Values for Unit Components
Evap. Cond.
Total
Size
Size
"C"
(EVSZ) (CDSZ)
Value
032S 032S 50.00
032S 032L 61.32
032L 032L 65.09
050S 050S 64.20
050S 050L 72.10
050L 050L 83.17
050S 080S 69.71
050L 080L 90.52
080S 080S 86.48
080S 080L 96.22
080L 080L 111.50
080L 142L 117.53
142M 142L 127.49
142L 142L 134.89
142E 142L 143.11
210L 210L 149.91
CVHE-SVX02M-EN
Short Long H. Free
Aux.
H.R. R. Cooling
Cond.
Cond. Cond. Econ.
18.87 25.19 15.30
23.55 31.45 15.30
N/A N/A N/A
29.06 38.80 15.30
N/A N/A N/A
51.01 56.80 15.30
Table 12. "C" values used to determine rupture disk
vent line sizes; for use with the following figure
(continued)
Evap.
Cond.
Size Size
(EVSZ) (CDSZ)
250E 250L
210D 210D
250D 250D
3.66
250M 250M
250X 250X
Notes:
5.50 1. Rupture disk diameter is 3 in. (76.2 mm), with the exception of
250E evaporator/250L condenser units with heat recovery which
have a rupture disk diameter of 4 in. (101.6 mm).
2. To determine the total "C" value for a specific unit, add the
appropriate "C" values for the evaporator, standard condenser, and
N/A
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.
5.38
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.
N/A
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
RuptureGuard™ is not available for 250E evaporator/250L
7.13
condenser units with heat recovery.
V V e e n n t t P P i i p p i i n n g g
"C" Values for Unit Components
Total Short Long H.
Aux.
"C" H.R. R.
Cond.
Value Cond. Cond.
175.74 N/A 62.12 15.30
112.93
15.30
122.62
N/A N/A
146.36
15.30
164.74
Free
Cooling
Econ.
N/A
7.13
N/A
41