Trane CVHH CenTraVac, Инструкция по установке, эксплуатации и обслуживанию

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CVHH-SVX001G-EN 39
Figure 25. Arrangement for rupture disk relief piping
Alternate
Outside
wall
Support
this pipe
Purge discharge
vent line
Rupture disk
assembly
Flexible
steel
connection
1/4 in. FL x 1/4 in. NPT
drain valve
Drip leg
(length as required
for easy access)
IIm mp po orrtta an ntt:: On the purge discharge vent line, the purge
exhaust connection point MUST be lower
than the purge height. Do NOT create a U-
trap; extend to drip leg if necessary to
avoid a trap.
Trane RuptureGuard
General Information
The Trane RuptureGuard ™ refrigerant containment
system replaces the carbon rupture disk on new low
pressure chillers utilizing R-1233zd. The
RuptureGuard
™ consists of a solid-metal, (non-
fragmenting) reverse-buckling rupture disk and
automatically re-seating relief valve. The relief valve
and the rupture disk are rated at the chiller’s maximum
working pressure level. If the chiller’s refrigerant
pressure exceeds the rupture disk burst rating, the disk
bursts, releasing pressure to the relief valve. The relief
valve vents the pressure down to a safe level and then
re-seats, thus minimizing the amount of refrigerant
vented to the atmosphere. The following figure
illustrates the operation of a reverse buckling rupture
disk.
Figure 26. Reverse buckling rupture disk (top view)
Flow
Flow
Flow
Flow Flow
Chiller Chiller Chiller
Disk in normal
operating
position.
Chiller pressure
is below 50 psig
(344.7 kPaG).
When chiller
pressure
exceeds the
disk’s rated
burst pressure,
the disk begins
to tear open
along the score
line of the outlet
ring.
The disk snaps
open through
the score line of
the outlet ring
and the pressure
is vented. The
outlet ring is
designed with a
hinge area to
retain the disc
petal.
To prevent water, refrigerant, and/or other debris such
as rust from hindering the operation of the valve, a drip
leg should be installed immediately after or
downstream of the RuptureGuard
™ (refer to the figure
in “Connection to External Vent Line and Drip Leg,” p.
39 ).
Connection to External Vent Line and
Drip Leg
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With RuptureGuard ™ installed horizontally, the drain
plug downstream of the valve relief plug and nearest to
the bottom of the valve body should be piped to the
drip leg in the vent line (refer to the following figure).
This will allow the removal of any condensate formed
within the valve body.
Provisions, such as installing a set of flanges (refer to
the following figure) or other disconnect means, must
be made in the discharge vent piping. This will allow
the piping downstream of the valve to be easily
removed for an annual inspection, to replace the metal
RuptureGuard
™ disk, or for any other servicing need.
1. Connect the discharge of the valve assembly to the
V Ve en ntt P Piip piin ng g