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COSTAN TECHNICAL DOCUMENTATION
REVISION STATUS
TRUE COPY
PAGE 13 OF 18
PRODUCT:
EPTAGLOO
ORD
DATE
CHANGE ORDER
OF THE SIGNED
DATE OF 1st ISSUE
A
18.Dec.2008
UPDATE
ORIGINAL
13/June/07
DOC. no. QSM0000406A
CHAP. No.:
040
B
28.July.2009
UPDATE
C
CHAPTER:
INSTALLATION
C
23.Feb.2010
RANGE
EXTENSION
D
11.Nov..2010
SAFETY VALVE ADDED
ISSUED BY MKT
When located outdoors, safety valves (pressure relief valves) must be suitably protected
from getting soiled and being affected by the elements.
When connected up to the rest of the system components, therefore to pressure vessels that may be
subject to a pressure increase in case of fire, these will be fitted with the appropriate safety valves
that guarantee the discharge of refrigerant.
Below are some regulations covering the installation of systems that use POE oils and R404A
gas refrigerant. For more detailed information and in case of doubt, contact the Epta after-
sales service.
!
The semi-hermetic compressors used on the Eptagloo equipment use polyester
oil (POE) as lubricant. A drawback of this oil, which is compatible with
chlorine-free refrigerants (HFC), is that it is very sensitive to environmental
humidity (strong hygroscopicity), which means that certain rules have to be
observed as regards use, in order not to jeopardize its functional characteristics.
All oil containers must stay sealed until the oil has to be introduced into the
compressor. Avoid leaving the inside of the compressors and parts of the
refrigeration circuit in connection with the outside even during routine system
maintenance. Never pour left-over lubricant into damp-permeable containers
(e.g. plastic containers) but keep in the original metal can.
Visual inspection of the equipment
All permanent connections must be individually appraised by duly qualified and experienced
personnel.
Pressure-tightness test
The dimensions of the safety valve and associated relief pipe were chosen in order to avoid
excessive pressure increases in vessels not protected by safety pressure switch in case of a
fire event, as per the instructions in European standards EN 13136.
!
Check that the lead seal on the valve located between the liquid receiver and the
safety valve is intact. Absolutely avoid tampering with the lead seal unless the safety
valve is replaced.
This test must be performed after visual inspection.
Before and during the test, every measure to prevent hazards to persons and property in
case of explosion must be taken.
The pressure-tightness test is performed with equal pressure values on both sides of the system:
-
High pressure side: test pressure = 16 bar
(PSa=28 bar)
-
low pressure side: test pressure = 16 bar
(PSb=17 bar)
In order to achieve test pressure it is necessary to:
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