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g) If the system is prone to instantaneous pressure surges which exceed the dryer's
rated capacity, mount a suitably sized receiver near the overpressure source. For
more precise information, contact the manufacturer or distributor.
h) It is necessary install a pre--- filter (max. 3 micron) on the dryer intake to prevent
rust, scale or other pollutants from entering the system and clogging the conden-
sate drain and heat exchangers, thereby causing severe pressure drops.
This filter must be close to the dryer inlet.
i) For water cooled versions it is recommended to install a filter on the condenser
water inlet to prevent the ingress of debris that will gradually choke the passages,
with negative effects on dryer performance.
j)
Water -- cooled versions
WATER QUALITY RECOMMENDATIONS
The water quality should satisfy the following conditions:
Parameter
Concentration
Langelier Index
0 ---1
pH
7.5 ---9
2---
Sulfate (SO
)
<50 ppm
4
Electrical conductivity
10 ---500µS/cm
Ammonia (NH
)
<1 ppm
3
---
Chloride (Cl
)
<50 ppm
Total Hardness
70 ---150 ppm CaCO
Oxygen
<0.1 ppm
k) Always install a bypass line with shut---off valves (supplied as option for SR- 250
-- SR- 500) to permit maintenance or calibration without interrupting the com-
pressed air flow to the user.
l) Correctly connect the dryer to the air inlet and outlet connections. If the com-
pressed air network is prone to vibrations, use hoses to make the connections.
If the mains is subject to high levels of pulsation, ensure that the connection is
equipped with pulsation dampers.
Code: 02250145- - 604 SR- - 250 --- SR- - 3000
All manuals and user guides at all-guides.com
Parameter
Concentration
Iron (Fe)
<0,2 ppm
Nitrate (NO
)
<2 ppm
3
---
Alkalinity (HCO
)
70 ---300 ppm
3
Hydrogen Sulfide (H
S)
<0.05 ppm
2
Free CO
<5 ppm
2
Aluminium (Al)
<0.2 ppm
3
Condenser cooling
Condenser cooling
43.5 145 psig
43.5 ---145 psig
water pressure
(3 ---10 barg)
m) Do not connect condensate drains common to other pressurised drain lines in a
closed circuit. Make sure the outflow from the condensate drains is unimpeded.
Connect the condensate piping in such a way to ensure that sound levels are kept
to a minimum during drainage.
Ensure that all condensate is disposed of in a responsible manner, in accordance
with local norms concerning environmental protection.
n) The ambient air around the dryer and compressor must not contain solid or gas-
eous contaminants. All compressed and condensed gases can generate acids or
chemical products which may damage the compressor or components inside the
dryer.
Take particular care with sulphur, ammonia, chlorine and installations in marine
environments. For further advice or assistance consult the manufacturer.
2.1
Electrical connection (see Fig. 5 / Fig. 10)
Use a cable that complies with regulations in force in the country of installation (con-
nected to terminals "L1 and L2
"L1---L2---L3---GND
" for three---phase machines), connected to the junction
box, with minimum wire sizes: (see machine electrical schematic in Fig. 10).
Install an overcurrent and earth leakage circuit breaker upstream from the
plant (IDn = 0.3A) with a 0.12 inch (3 mm) gap between contacts when open (refer
also to local laws).
2.2
Condensate drain connection
a) The drainer is already installed and cabled.
b) Connect the condensate drain outlet to the drainage system.
c) Any maintenance operation must be done by an expert technician.
N.B.: The dryer is supplied either with a timed drain or an electronic level sensing
drain. Refer to the separate manual supplied with the dryer for specific details con-
cerning the condensate drain.
" for single---phase machines and to terminals
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