Environmental Protection - RHOSS TCHEY 105 Mode D'emploi

II.9.1 ORDINARY MAINTENANCE
II.9.1.1 Refrigerant circuit
• Refrigerant fluid ch arge control
With the unit off, fit a pressure gauge on the test poi nt on the outlet si de
and another on the test poi nt on the inlet si de. Start up the unit and
chec k both press ure readi ngs onc e they have stabilised.
• Check for the absence of refriger ant fluid leaks
With the unit off, chec k the r efrigerant circuit with a s uitable leak
detector.
II.9.1.2 Water circuit
• Checking the water differential pressure switch
With the unit running nor mall y, sl owl y cl ose the isolating valve on the
unit water inlet pipe. If, during a test phase, the point is reac hed wher e
the is olating val ve is compl etel y cl osed without the differenti al press ure
val ve cutting in, s top the unit i mmediatel y by pressi ng ON/OFF on the
control panel and replac e the c omponent.
• Bleeding air from the chilled wat er system .
With the unit off, us e the bleed val ves insi de the unit next to the water
outlet pipe. T he val ve is accessibl e manuall y by removing the right side
panel and/or the upper panel. Direct the bleed flow away from
electrically live parts.
• Circulation pump r elease (only for P models)
With the unit off, remove the right side panel and remove the screw that
holds the circulation pump. T urn the r eleas e screw loc ated in the inside,
then put the scr ew that holds the circulation pump bac k i n pl ace.
• Draining the water system
With the unit off, us e the val ves present near the water connec tion.
• W ater evaporator cleaning
Plate exchangers ar e not s ubjec t to fouling in rated runni ng conditions.
The wor king temperatures of the unit, the s peed of the water in the
pipes and the s uitable fi nish of the heat exc hanging surface reduce
fouling of the exc hangers to a mini mum.
Any sludge that may for m in the water circuit or any silt that cannot be
trapped by the filter, as well as extremel y hard water c onditions or high
concentrati ons of any antifr eeze solution used, may clog the
exc hangers and undermi ne their heat exc hanging efficienc y. In this
case you will need to wash the heat exchanger with suitable c hemical
detergents.
For this, c ontact the RHOSS S.p.A. after-sales s er vice office.
ENVIRONMENTAL PROT ECTION !
If the system has an antifreeze additive, it mu st not
be drain ed freely, b ecause it causes pollution. It
should be co llected for possible recycling. The
filling valve must not be op ened in the presence of
glycol water.
II.9.1.3 Electric circuit
The followi ng chec ks are rec ommended on the electrical circuit:
• chec k the unit power cons umpti on using a clip-on meter and
compare the reading with the values shown in the technic al data table;
• with the unit s witched off and disc onnected from the power suppl y,
chec k and inspect electrical c ontacts and ter minals for tightness.
SECTION II: INST ALL ATION AND MAINTEN ANCE
II.9.2 EXTRAORDINARY MAINTENANCE
II.9.2.1 Component replacement instructions
If a unit r equires repair, drain the refrigerant from both the high and low-
pressure si des and in the liquid line. T his is because, if the coolant is
onl y drai ned from the high press ure side, the compress or springs may
close together, thereby preventi ng the press ure from equalising. In this
way, the low pressure part of the casi ng and the inl et line could remain
pressurised. In this c ase, if you appl y a brazing torch to one of the low-
pressure c omponents of the s ys tem, the press urised mi xture of
refrigerant and oil coul d bl ow out of the circuit and ignite on c ontact with
the brazing torc h. To avoi d this hazard, make s ure that both the high
and low press ure sides of the circuit have ac tually been drained before
appl ying br azing torches.
II.9.2.2 Restoring the refrigerant charge
Rapidl y filling with refrigerant on the inlet side of a si ngle-phas e s ystem
may prevent the compress or from starti ng or cause a breakage. The
best way to avoid this situation is to charge both sides, high and low
pressure, simultaneously.
Topping up units with R410A refrigerant (R32/R125) must be c arried
out i n the liquid phas e, piping it from a c ylinder so as not to alter its
composition.
II.10 INSTRUCTIONS FOR DISMANTLING THE UNI T
AND DISPOSING OF HAZARDOUS
SUBSTANCES
ENVIRONMENTAL PROT ECTION !
RHOSS has always been awar e of the importan ce of
protecting the environment. W hen the unit is
dismantled, it is important to adher e scrupulously
to the following pro cedures.
The unit s houl d onl y be dis mantled by a fir m authorized for the dispos al
of scrap machiner y/products .
The unit as a whole is composed of materials which can be tr eated as
SRM (secondar y raw materials) and the following conditions must be
obser ved:
• the c ompressor oil must be removed, recovered and deli vered to a
body authorized to coll ect waste oil;
• if the applianc e contains antifreeze, this s hould not j ust be dispos ed
of freely, as it causes polluti on. It s hould be c ollected for possi ble
recycling.
• refrigerant fluid should not be disc harged into the atmos phere. It
shoul d instead be rec overed by means of homologated devices, stored
in suitable c ylinders and delivered to a company authorised for the
collection;
• the filter-drier and el ectronic c omponents (el ectrol ytic condens ers)
are considered s pecial was te, and mus t be delivered to a body
authorized to c ollect s uch items;
• the foamed pol yurethane rubber and foamed pol yethyl ene mesh
pipe i nsulati on, the foamed pol yurethane ( which surrounds the stor age
tank), the shrink-wrap, the polys tyrene pac kaging and the s ound-
absorbent sponge lini ng on the bodywor k must be removed and
processed as urban r efus e.
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