Table of Contents
Advertisement
Vent Piping
Figure 25. Arrangement for rupture disk relief piping
Outside
wall
Support
this pipe
Flexible
steel
connection
(length as required
for easy access)
Important: 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.
Note: The drip leg is REQUIRED. The drip leg should be a
minimum of 1 gal (3.8 L) capacity and must be
drained periodically for proper chiller purge
operation.
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.
38
Alternate
Purge discharge
vent line
Rupture disk
assembly
Drip leg
1/4 in. FL x 1/4 in. NPT
drain valve
Figure 26. Reverse buckling rupture disk (top view)
Disk in normal
When chiller
operating
pressure
position.
exceeds the
Chiller pressure
disk's rated
is below 50 psig
burst pressure,
(344.7 kPaG).
the disk begins
to tear open
along the score
line of the outlet
ring.
Flow
Chiller
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
External Vent Line and Drip Leg," p.
Connection to External Vent Line and
Drip Leg
NOTICE
Equipment Damage!
Failure to follow instructions below could result in
equipment damage.
All vent lines must be equipped with a drip leg of
sufficient volume to hold the expected accumulation
of water and/or refrigerant. The drip leg must be
drained periodically to assure that it does not
overflow and allow fluid to flow into the horizontal
portion of the vent line. Trane assumes no
responsibility for equipment damage caused by
insufficient drainage of drip leg.
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
vent line connected to the outdoors.
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.
Flow
Flow
Flow
Flow
Chiller
Chiller
"Connection to
38).
CDHH-SVX003C-EN
Advertisement
Table of Contents
