Purge System; Leak Checking Based On Purge Pump; Out Time; Long Term Unit Storage - Trane CVHE Installation, Operation And Maintenance Manual

R R e e c c o o m m m m e e n n d d e e d d M M a a i i n n t t e e n n a a n n c c e e
N N o o t t e e s s : :
• Use only Trane oil and verify proper
refrigerant and oil for your chiller before
proceeding! A full oil change is 9 gallons
(34.1 L) of oil.
– For R-123 chillers, use OIL00022
(2.5 gallon [9.5 L] containers).
– For R-514A chillers, use OIL00334
(1 gallon [3.8 L] containers)/OIL00335
(5 gallon [18.9 L] containers).
• One spare oil filter is provided with each
new chiller. If not used earlier, use at first
recommended oil and filter change.
• This recommended oil change is NOT
covered by factory warranty.

Purge System

The use of low-pressure refrigerant in CenTraVac™
chillers permits any section of the unit to be below
atmospheric pressure, regardless of whether the unit is
running. This creates an environment in which air or
moisture could enter the unit. If these non-
condensables are allowed to accumulate while the
chiller is running, they become trapped in the
condenser; this situation increases condensing
pressure and compressor power requirements, and
reduces the chiller's efficiency and cooling capacity.
Therefore, proper maintenance of the purge system is
required.
The purge is designed to remove non-condensable
gases and water from the refrigeration system. For R-
123 chillers, purge operation, maintenance, and
troubleshooting procedures are detailed in Operation
and Maintenance Guide: EarthWise Purge System with
Tracer AdaptiView Control for Water-Cooled
CenTraVac Chillers with R-123 Refrigerant (PRGD-
SVX01*-EN). For R-514A chillers, purge operation,
maintenance, and troubleshooting procedures are
detailed in Operation and Maintenance Guide: Purge
System with Tracer AdaptiView Control for Water-
Cooled CenTraVac Chillers with R-514A Refrigerant
(PRGE-SVX001*-EN).
Leak Checking Based on Purge Pump Out
Time
Use the following formula to calculate the annual
refrigerant leakage rate based on the daily purge
pump-out time and the unit refrigerant charge.
Formula: % annual leakage rate = [(X min/day)*
(0.0001 lb of refrigerant/min)/(Y lb)]*100
• X = minutes/day of purge pump out operation
• Y = initial refrigerant charge
The following figure has been developed to aid in
determining when to do a leak check of a chiller based
on the purge pump-out time and unit size. This figure
86
depicts normal purge pump-out times, small leaks, and
large leaks based on chiller tonnage.
If the purge pump-out time is in the small leak region,
then a leak check should be performed and all leaks
repaired at the earliest convenience. If the purge pump-
out time is in the large leak region, a thorough leak
check of the unit should be performed immediately to
find and fix the leaks.
Figure 58. Purge operation under typical and leak
conditions

Long Term Unit Storage

If the chiller will be stored for more than six months
after production, contact your local Trane Service
Agency for required extended storage actions to
minimize impact to the chiller and preserve the
warranty. In addition, contact your local Trane Service
Agency for recommendations for storage requirements
for chillers to be removed from service in excess of a
normal seasonal shut-down.
W W A A R R N N I I N N G G
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P P r r e e s s s s u u r r 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
a a n n e e x x p p l l o o s s i i o o n n w w h h i i c c h h 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 . .
S S y y s s t t e e m m c c o o n n t t a a i i n n s s r r e e f f r r i i g g e e r r a a n n t t a a n n d d m m a a y y b b e e u u n n d d e e r r
p p o o s s i i t t i i v v e e p p r r e e s s s s u u r r e e ; ; s s y y s s t t e e m m m m a a y y a a l l s s o o c c o o n n t t a a i i n n o o i i l l . .
R R e e c c o o v v 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 t t o o r r e e l l i i e e v v e e p p r r e e s s s s u u r r e e b b e e f f o o r r e e
o o p p e e n n i i n n g g t t h h e e s s y y s s t t e e m m . . S S e e e e u u n n i i t t n n a a m m e e p p l l a a t t e e f f 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 y y p p e e . . D D o o n n o o t t u u s s e e n n o o n n - - a a p p p p r r o o v v e e d d
r r e e f f r r i i g g e e r r a a n n t t s s , , r r e e f f r r i i g g e e r r a a n n t t s s u u b b s s t t i i t t u u t t e e s s , , o o r r n n o o n n - -
a a p p p p r r o o v v e e d d r r e e f f r r i i g g e e r r a a n n t t a a d d d d i i t t i i v v e e s s . .
N N O O T T I I C C E E
C C h h i i l l l l e e r r 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 e e n n s s u u r r e e t t h h a a t t w w a a t t e e r r i i s s n n o o t t p p r r e e s s e e n n t t i i n n t t u u b b e e s s
d d u u r r i i n n g g e e v v a a c c u u 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 f f r r e e e e z z i i n n g g t t u u b b e e s s , ,
d d a a m m a a g g i i n n g g t t h h e e c c h h i i l l l l e e r r . .
CVHE-SVX02M-EN