Repair To Intrinsically Safe Components; Cabling; Detection Of Flammable Refrigerants; Leak Detect Methods - Beko BEHPI 090 Installation Manual

13 Informat on serv c ng
Ensure that apparatus s mounted securely.
Ensure that seals or seal ng mater als have not degraded such that they no longer serve the
purpose of prevent ng the ngress of flammable atmospheres. Replacement parts shall be n
accordance w th the manufacturer's spec f cat ons.
C
Note: The use of s l con sealant may nh b t the effect veness of some types of leak
detect on equ pment. Intr ns cally safe components do not have to be solated pr or to
work ng on them.
11. Repa r to ntr ns cally safe components
Do not apply any permanent nduct ve or capac tance loads to the c rcu t w thout ensur ng that th s
w ll not exceed the perm ss ble voltage and current perm tted for the equ pment n use. Intr ns cally
safe components are the only types that can be worked on wh le l ve n the presence of a flammable
atmosphere. The test apparatus shall be at the correct rat ng. Replace components only w th parts
spec f ed by the manufacturer. Other parts may result n the gn t on of refr gerant n the atmosphere
from a leak.
12. Cabl ng
Check that cabl ng w ll not be subject to wear, corros on, excess ve pressure, v brat on, sharp edges or
any other adverse env ronmental effects. The check shall also take nto account the effects of ag ng or
cont nual v brat on from sources such as compressors or fans.
13. Detect on of flammable refr gerants
Under no c rcumstances shall potent al sources of gn t on be used n the search ng for or detect on of
refr gerant leaks. A hal de torch (or any other detector us ng a naked flame) shall not be used.
14. Leak detect on methods
The follow ng leak detect on methods are deemed acceptable for systems conta n ng flammable
refr gerants. Electron c leak detectors shall be used to detect flammable refr gerants, but the
sens t v ty may not be adequate, or may need re-cal brat on.(Detect on equ pment shall be cal brated n
a refr gerant-free area.) Ensure that the detector s not a potent al source of gn t on and s su table for
the refr gerant. Leak detect on equ pment shall be set at a percentage of the LFL of the refr gerant and
shall be cal brated to the refr gerant employed and the appropr ate percentage of gas (25% max mum)
s conf rmed. Leak detect on flu ds are su table for use w th most refr gerants but the use of detergents
conta n ng chlor ne shall be avo ded as the chlor ne may react w th the refr gerant and corrode the
copper p pe-work.
If a leak s suspected, all naked flames shall be removed or ext ngu shed. If a leakage of refr gerant s
found wh ch requ res braz ng, all of the refr gerant shall be recovered from the system, or solated (by
means of shut off valves) n a part of the system remote from the leak. Oxygen free n trogen (OFN)
shall then be purged through the system both before and dur ng the braz ng process.
56 / 120 EN
Spl t-type room a r cond t oner / Installat on Manual