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V V e e n n t t P P i i p p i i n n g g
W W A A R R N N I I N N G G
P P r r e e s s s s u u r r e e - - R R e e l l i i e e f f D D e e v v i i c c e e D D i i s s c c h h a a r r g g e e
H H a a z z a a r r d d ! !
A A n n i i m m p p r r o o p p e e r r v v e e n n t t - - l l i i n n e e t t e e r r m m i i n n a a t t i i o o n n c c o o u u l l d d r r e e s s u u l l t t i i n n
d d e e a a t t h h o o r r s s e e r r i i o o u u s s i i n n j j u u r r y y o o r r e e q q u u i i p p m m e e n n t t d d a a m m a a g g e e . .
W W h h e e n n a a p p r r e e s s s s u u r r e e - - r r e e l l i i e e f f d d e e v v i i c c e e o o p p e e r r a a t t e e s s , , i i t t c c o o u u l l d d
d d i i s s c c h h a a r r g g e e a a l l a a r r g g e e a a m m o o u u n n t t o o f f f f l l u u i i d d a a n n d d / / o o r r v v a a p p o o r r . .
U U n n i i t t s s M M U U S S T T b b e e e e q q u u i i p p p p e e d d w w i i t t h h a a v v e e n n t t - - l l i i n n e e
t t e e r r m m i i n n a a t t i i o o n n t t h h a a t t d d i i s s c c h h a a r r g g e e s s o o u u t t d d o o o o r r s s i i n n a a n n a a r r e e a a
t t h h a a t t w w i i l l l l n n o o t t s s p p r r a a y y r r e e f f r r i i g g e e r r a a n n t t o o n n a a n n y y o o n n e e . .
N N O O T T I I C C E E
P P r r o o p p e e r r R R e e f f r r i i g g e e r r a a n n t t V V e e n n t t L L i i n n e e
T T e e r r m m i i n n a a t t i i o o n n ! !
F F a a i i l l u u r r e e t t o o p p r r o o p p e e r r l l y y t t e e r r m m i i n n a a t t e e a a r r e e f f r r i i g g e e r r a a n n t t v v e e n n t t
l l i i n n e e c c o o u u l l d d r r e e s s u u l l t t i i n n e e q q u u i i p p m m e e n n t t d d a a m m a a g g e e . .
I I m m p p r r o o p p e e r r l l y y t t e e r r m m i i n n a a t t i i n n g g a a r r e e f f r r i i g g e e r r a a n n t t v v e e n n t t l l i i n n e e
c c o o u u l l d d a a l l l l o o w w r r a a i i n n t t o o e e n n t t e e r r t t h h e e l l i i n n e e . . A A c c c c u u m m u u l l a a t t e e d d
r r a a i i n n w w a a t t e e r r c c o o u u l l d d c c a a u u s s e e t t h h e e r r e e l l i i e e f f d d e e v v i i c c e e t t o o
m m a a l l f f u u n n c c t t i i o o n n ; ; o o r r , , i i n n t t h h e e c c a a s s e e o o f f a a r r u u p p t t u u r r e e d d i i s s k k , , t t h h e e
r r a a i i n n w w a a t t e e r r p p r r e e s s s s u u r r e e c c o o u u l l d d c c a a u u s s e e t t h h e e d d i i s s k k t t o o r r u u p p t t u u r r e e , ,
a a l l l l o o w w i i n n g g w w a a t t e e r r t t o o e e n n t t e e r r t t h h e e c c h h i i l l l l e e r r . .
Route the vent-line piping so that it discharges
outdoors in an area that will not spray refrigerant
on anyone. Position the vent-line discharge at least
15 ft (4.6 m) above grade level and at least 20 ft
(6.1 m) from any building opening. Provide a vent-
line termination that cannot be blocked by debris or
accumulate rainwater.
Provide a drip leg on the vent line (refer to the
following figure [arrangement for rupture disk relief
piping]). Provide a standard 1/4-in. FL x 1/4-in. NPT,
capped refrigerant service valve to facilitate liquid
removal.
N N O O T T I I C C E E
E E q q u u i i p p m m e e n n t t D D a a m m a a g g e e ! !
F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w c c o o u u l l d d r r e e s s u u l l t t i i n n
e e q q u u i i p p m m e e n n t t d d a a m m a a g g e e . .
A A l l l l v v e e n n t t l l i i n n e e s s m m u u s s t t b b e e e e q q u u i i p p p p e e d d w w i i t t h h a a d d r r i i p p l l e e g g o o f f
s s u u f f f f i i c c i i e e n n t t v v o o l l u u m m e e t t o o h h o o l l d d t t h h e e e e x x p p e e c c t t e e d d
a a c c c c u u m m u u l l a a t t i i o o n n o o f f w w a a t t e e r r a a n n d d / / o o r r r r e e f f r r i i g g e e r r a a n n t t . . T T h h e e d d r r i i p p
l l e e g g m m u u s s t t b b e e d d r r a a i i n n e e d d p p e e r r i i o o d d i i c c a a l l l l y y t t o o a a s s s s u u r r e e t t h h a a t t i i t t
d d o o e e s s n n o o t t o o v v e e r r f f l l o o w w a a n n d d a a l l l l o o w w f f l l u u i i d d t t o o f f l l o o w w i i n n t t o o t t h h e e
h h o o r r i i z z o o n n t t a a l l p p o o r r t t i i o o n n o o f f t t h h e e v v e e n n t t l l i i n n e e . . T T r r a a n n e e a a s s s s u u m m e e s s
n n o o r r e e s s p p o o n n s s i i b b i i l l i i t t y y f f o o r r e e q q u u i i p p m m e e n n t t d d a a m m a a g g e e c c a a u u s s e e d d b b y y
i i n n s s u u f f f f i i c c i i e e n n t t d d r r a a i i n n a a g g e e o o f f d d r r i i p p l l e e g g . .
Consult local regulations and codes for any
additional relief line requirements and refer to
appropriate refrigerant handling guidelines. For
chillers with R-123 refrigerant, refer to Installation,
Operation, and Maintenance: R-123 Low-Pressure
Refrigerant Handling Guidelines Conservation and
Safe Handling of R-123 Refrigerant in Trane Chillers
for Service Technicians (CTV-SVX05*-EN). For
36
chillers with R-514A refrigerant, refer to Installation,
Operation, and Maintenance: R-514A Low-Pressure
Refrigerant Handling Guidelines Conservation and
Safe Handling of R-514A Refrigerant in Trane
Chillers for Service Technicians (CTV-SVX008*-EN).
Figure 24. Rupture disk location and cross section of
rupture disk
Gasket
Outside pipe
assembly
Suction connection
Rupture disk
Cap
Bolt
N N o o t t e e s s : :
Pipe connection is 3 in. (76.2 mm) NPT.
There are two rupture disks on CDHF chillers,
one per refrigerant circuit.
CDHF-SVX01N-EN

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