Danfoss iSave 50, Operating Manual

Page: 34 / 92

Data sheet | iSave 50 and iSave 70
34
180R9357 | AQ265943679828en-00100
2
IOM iSave 50 - 70 | 0
3
.202
3
Explanation of P&ID setup
A. Inlet filter:
Place inlet filters on LP string in front of the
iSave (11). Please see Guide line 521B1009 on
Filtration.
If recommended housing design and
cartridges are not used, a second stage
filter is required, see above (*).
Thoroughly clean pipes and flush system
prior to start-up.
B. Inlet pressure:
Must assure that iSave is running according to
specifications. Refer to iSave data sheet.
Required: Must assure min. pressure to avoid
cavitation.
Recommended: Must assure max. pressure to
avoid hydraulic and mechanical overload.
(13) used for iSave 21 and iSave 40.
(24) used for iSave 50 and iSave 70.
C. Piping and hoses:
Dimension the piping to obtain minimum
pressure loss (large flow, minimum pipe
length, minimum number of bends/
connections and fittings to prevent pressure
loss and flow turbulence). Use flexible hoses
to minimize vibrations and noise. Please
consult the Danfoss Hoses and Hose Fittings
data sheet (521B0909 ) and Right and wrong
Hose assembly (180R9084) for guidance.
D. Inlet flow control and mixing:
To balance LP flow up against HP flow on the
iSave and control mixing, place a
flowmeter on low-pressure inlet (12) or low
pressure outlet (20) of the iSave.
E. Outlet pressure control:
In order to control the inlet pressure needed a
back pressure valve (15) must be installed in
the common outlet pipe from the iSaves. The
valve should be designed to control flow.
It is recommended to use a manual valve with
lock function or an automatic controlled
valve.
F. Variable speed and overload protection:
Install a VFD to control the speed of the iSave
and protect it against mechanical overload.
See instruction 180R9372 for guidance of VFD
settings.
G. LP discharge flow control:
See “E”.
H. Air venting:
Install an air bleed valve (8) on the highest
point of the high-pressure piping to ensure
the air is purged from the system before
startup.
Media filter
M
Permeate
iSave
F
F F
Flowmeter
VFD
M
HP in
HP out
VFD
M
HP in
HP out
VFD
Fresh water
permeate flush
Full flow
cleaning/CIP
6
7
17
8
9
27
15
13
10 11
11
12
19
Filter
3 micron
nominel
Filter
10 micron
absolut
Drain
4
18
5
M
4
18
VFD
LP in
20
F
*
*
Second stage filter: If recommended housing design and cartridges are not used, a second stage filter is required
1
21
2
PS
PI
PS
PI
PS
14
PI
PI
PI
PI
PI
3
A
B C
22
22
PS
24
23 23
25
25
26
26
16
CIP
28
7.5 RO systems with an iSave