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1. General information
The flow switch described in the operating instructions has been designed and
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manufactured using state-of-the-art technology. All components are subject to strin-
gent quality and environmental criteria during production. Our management systems
are certified to ISO 9001.
These operating instructions contain important information on handling the instru-
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ment. Working safely requires that all safety instructions and work instructions are
observed.
Observe the relevant local accident prevention regulations and general safety regula-
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tions for the instrument's range of use.
The operating instructions are part of the product and must be kept in the immediate
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vicinity of the instrument and readily accessible to skilled personnel at any time. Pass
the operating instructions on to the next operator or owner of the instrument.
Skilled personnel must have carefully read and understood the operating instructions
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prior to beginning any work.
The general terms and conditions contained in the sales documentation shall apply.
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Subject to technical modifications.
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Further information:
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- Internet address:
www.wika.de / www.wika.com
- Relevant data sheet:
FL 50.01
2. Design and function
2.1 Overview
Over view
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1
2
1. Cover
2. U-bolt nuts
3. Saddle
3
4. U-bolt
5. Paddle
6. Data lable
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5
WIKA operating instructions, flow switch, model FSFD
Use tamper
allen key to remove
cover
Case
U-bolt, nut
Saddle
U-bolt
Plastic paddle
Product label
Roll paddle in
opposite direction
of water flow
2.2 Description
The model FSFD is a vane-type flow switch for use in wet sprinkler systems. Water flow
in the pipe moves the vane which generates a switching output, typically after a set
delay. All switches are activated when a water flow of 10 gallons per minute (gpm) or
more occurs but will not be activated when the flow is less than 4 gpm.
2.3 Terms used
Begriff
Erklärung
Maximum operating flow
The maximum flow with which the instrument can be used
without changing the assured performance data.
Operating pressure
The maximum pressure with which the instrument can be used
without changing the assured performance data.
Retard
The time delay between the paddle's response to the flow
and the switching output. This delay is typically controlled by a
pneumatic retard unit.
2.4 Scope of delivery
Flow switch, operating instructions, Allen key to open the case
Cross-check scope of delivery with delivery note.
3. Safety
3.1 Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or
death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or
damage to property or the environment, if not avoided.
DANGER!
... identifies hazards caused by electrical power. Should the safety instructions not
be observed, there is a risk of serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation that can result in burns, caused by
hot surfaces or liquids, if not avoided.
Electrical conduit
Information
entrance
... points out useful tips, recommendations and information for efficient and
trouble-free operation.
Tight u-bolt nut with
washers alternately
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