© LNS FOX Instruction manual series WS (USA) pag. 8 of 28 - rev. 06-2014
g) anti-vibration mounts to reduce the vibration level transmitted to the structure.
h) Pre-filtration (stage 1)
The cartridge, composed of 3 different stages with progressive filtration levels guarantees high capability of
accumulating particles and the slow and efficient draining effect. The first element (metallic screen) is washable.
i) Centrifugal filtration (stage 2)
A special impeller (vibration free) ensures the centrifugal effect that enables the continuous discharge of
condensed particles.
j) Main filtration (stage 3)
Made of fibreglass, provides an average filtration efficiency level
>
99 %. (measured accordingly to AFNOR NFX
44-060 norm). Its clogging is monitored by a pressure gauge that, once it reaches the red area of the scale,
indicates that the cartridge must be replaced.
For special applications there is the possibility to install an additional filtration module that perfectly fits on the
unit. The addition is simple and can be performed even later on with a special kit.
•
Absolute: to eliminate dry smoke, filtration level HEPA up to H 13 - 99.95 MPPS according to EN
1822
•
Activated carbon: to eliminate odors
3.2. General characteristics
Model
WS 170
WS 330
WS 700
WS 1020
WS 1250
Frequency
[Hz]
60
60
60
60
60
Air flow (*)
[cfm]
168
330
665
1012
1248
Pressure max
[IN W.C.]
2,41
3,57
5,70
7,23
9,23
Noise level
[dB(A)]
63
65
71
73
75
R.P.M.
[min
-1
]
3290
3350
3420
3425
3425
Weight
[lbs]
62
77
121
165
187
(*) with additional filtration stage (HEPA filter or activated carbon) air flow is reduced by about 15%
3.3. Air Flow curves
Fig. 5 Performance curve at 60Hz
3.4. Electrical characteristics
Electric motor (three phases)
WS 170
WS 330
WS 700
WS 1020
WS 1250
Shaft height
63
71
80
90
90
Frame
B5
B5
B5
B5
B5
N° poles
2
2
2
2
2
Protection index IP
55
55
55
55
55
Isolation class
F
F
F
F
F
Voltage/frequency V/Hz]
230-400-460/60
Power [hp]
0.4
0.6
1.2
2.4
3.5
