Potter VSR-ST waterflow alarm switch Instruction manual

FOR SMALL PIPE
VSR-ST
VANE TYPE WATERFLOW
ALARM SWITCH WITH RETARD
Installation must be perfomed by qualified personnel and in accordance
with all national and local codes and ordinances.
Shock hazard. Disconnect power source before servicing. Serious
injury or death could result.
Risk of explosion. Not for use in hazardous locations. Serious injury
or death could result.
Service Use:
Automatic Sprinkler
One or two family dwelling
Residential occupancy up to four stories
National Fire Alarm Code
NFPA-13
NFPA-13D
NFPA-13R
NFPA-72
The Model VSR-ST is a vane type waterflow switch for use on wet
sprinkler systems that use 1", 1-1/4", 1-1/2" or 2" pipe sizes. It is equipped
with a union to accommodate installation in confined spaces.
The unit contains two single pole double throw snap action switches and
an adjustable, instantly recycling pneumatic retard. The switches are
actuated when a flow of 10 gallons per minute (38 liters per minute) or
more occurs downstream of the device. The flow condition must exist
for a period of time necessary to overcome the selected retard period.
Installation
These devices may be mounted in horizontal or vertical pipe. On
horizontal pipe they should be installed on the top side of the pipe
where they will be accessible. The units should not be installed within
6" (15 cm) of a valve, drain or fitting which changes the direction of
the waterflow. The unit has a 1" NPT fitting for threading into a noncorrosive TEE. See Fig. 1 for proper TEE size, type and installation.
Select the proper paddle for the pipe size and type of TEE used. See Fig.
3 for instructions on how to change the paddle.
Loosen the union nut and separate the 1" NPT fitting from the VSRST. Use no more than three wraps of teflon tape as thread lubricant.
Reattach the VSR-ST to the 1" NPT fitting, verifying that the o-ring is
properly positioned in its groove. Hand tighten the nut on the union after
orienting the device in the appropriate direction to detect waterflow as
shown in Fig. 2.
cUL, UL and CSFM Listed, NYMEA Accepted
Service Pressure: Up to 175 PSI (12,07 BAR)
Minimum Flow Rate for Alarm: 10 GPM (38 LPM)
Maximum Surge: 18 FPS (5,5 m/s)
Enclosure: Die-cast, red powdercoat finish
No. 1144465: Cover held in place with tamper resistant screws
No. 1144466: Tamper: Cover incorporates micro-switch.
Cover Tamper: Activated by cover removal.
Cover Tamper Switch Contacts: One set SPDT,
Rated at 250VAC.
Cover Tamper Switch Terminations: 8" 22AWG
wire leads.
Contact Ratings: Two sets of SPDT (Form C)
10.0 Amps at 125/250 VAC
2.0 Amps at 30 VDC Resistive
Conduit Entrances: Two openings provided for 1/2" conduit.
Individual switch compartments suitable for
dissimilar voltages.
Usage: Listed plastic, copper and schedule 40 iron pipe.
Fits pipe sizes - 1", 1¼", 1½" and 2"
Note: 12 paddles are furnished with each unit, one for each
pipe size of threaded and sweat TEE, one for 1" CPVC, one
for 1" CPVC (Central), one for 1" threaded Nibco CPVC,
and one for 1½" threaded (Japan).
Environmental Specifications:
• Suitable for indoor or outdoor use with factory installed gasket
and die-cast housing.
• For NEMA 4/IP55 rated enclosure - use with appropriate
conduit fitting and/or plugs.
• Temperature range: 40° F to 120° F (4,5° C to 49° C)
Stock Number: 1144465
1144466 w/TSK
Replaceable Components: Retard/Switch Assembly, stock no. 1029030
Do not over-tighten the union nut, hand tighten only.
The vane must not rub the inside of the TEE or bind in any way. The
stem should move freely when operated by hand.
The device can also be used in copper or plastic pipe installations with
the proper adapters so that the specified TEE fitting may be installed
on the pipe run.
Note: Do not leave cover off for an extended period of time.
Inspection and Testing
Check the operation of the unit by opening the inspector's test valve
at the end of the sprinkler line or the drain and test connection, if an
inspector’s test valve is not provided.
If there are no provisions for testing the operation of the flow detection
device on the system, application of the VSR-ST is not recommended
or advisable.
The frequency of the inspection and testing and its associated protective
monitoring system should be in accordance with the applicable NFPA
Codes and Standards and/or authority having jurisdiction (manufacturer
recommends quarterly or more frequently).
Potter Electric Signal Company, LLC • 2081 Craig Road, St. Louis, MO, 63146-4161 • Phone: 800-325-3936/Canada 888-882-1833 • www.pottersignal.com
PRINTED IN USA
MFG. #5401204- REV F
12/08
PAGE 1 OF 3
VSR-ST
FOR SMALL PIPE
VANE TYPE WATERFLOW
ALARM SWITCH WITH RETARD
Fig. 2
Retard Adjustment:
The delay can be adjusted by
rotating the retard adjustment knob
from 0 to the max setting (60-90
seconds). The time delay should
be set at the minimum required to
prevent false alarms.
Fig. 1
Screw the fitting into the TEE fitting as shown.
On sweat TEE's, no threaded bushings, inserts or adapters are
permitted unless they comply with the dimensions listed in the
chart below.
Shown with optional Cover Tamper Switch.
Do not leave cover off for an
extended period of time.
RETARD
ADJUSTMENT
KNOB
Fig. 3
Important - the depth to the inside bottom of the TEE should
have the following dimensions:
MOUNT SO ARROW
ON BASE POINTS
IN DIRECTION OF
WATERFLOW
INSURE THAT O-RING
IS IN O-RING GROOVE
BEFORE INSTALLING
SWITCH.
To prevent leakage apply teflon tape sealant to the
1" NPT male fitting only. Do not use any other type
of lubricant or sealant.
Approximate Depth Requirement
Tee Size
Threaded
Sweat
CPVC
1" X 1" X 1"
1-1/4" X 1-1/4" X 1"
1-1/2" X 1-1/2" X 1"
2" X 2" X1"
2-1/16"
2-7/16"
2-11/16"
3-3/16"
1-3/4"
2-7/16"
2-1/4"
2-3/4"
2-7/16"
N/a
N/a
N/a
1" NPT MALE
FITTING ON ALL
SIZES
DWG# 1204-1A
There are 12 paddles furnished with
each unit. One for each size of threaded,
sweat or plastic TEE as described in Fig.
1. The paddles have raised lettering that
show the pipe size and type of TEE that
they are to be used with. The proper
paddle must be used. The paddle must
be properly attached (see Fig. 3) and
the screw that holds the paddle must be
securely tightened.
RUN OF THE TEE
MAY BE 1" , 1 1/4",
1 1/2", OR 2"
Fig. 4 Switch Terminal Connections Clamping Plate Terminal
Cover Tamper Switch
(Shown with cover in place)
CO
IN
G
IN
O
TG
G
N
MI
DWG# 923-3
OU
An uninsulated section of a single conductor should not be looped around the terminal and serve as
two separate connections. The wire must be severed, thereby providing supervision of the connection
in the event that the wire becomes dislodged from under the terminal.
C
(WHT)
N.O.
(RED)
N.C.
(BLK)
DWG# 8810018-2
Fig. 5 Typical Electrical Connections
NO
BELL
NEGATIVE DC OR
NEUTRAL AC
NC
COM
POSITIVE DC
OR HOT AC
COM
NC
Notes:
1. The model VSR-ST has two switches, one can be used to operate a
central station, proprietary or remote signaling unit, while the other
is used to operate a local audible or visual annunciator.
2. For supervised circuits see “Switch Terminal Connections”
drawing and CAUTION note (Fig. 4).
EOLR
WATERFLOW ZONE
ON FIRE PANEL
NO
DWG# 1146-3A
Waterflow switches that are monitoring wet pipe sprinkler systems shall not
be used as the sole initiating device to discharge AFFF, deluge, or chemical
suppression systems. Waterflow switches used for this application may result in
unintended discharges caused by surges, trapped air, or short retard times.
PRINTED IN USA
air,
MFG. #5401204- REV F
12/08
PAGE 2 OF 3
VSR-ST
FOR SMALL PIPE
VANE TYPE WATERFLOW
ALARM SWITCH WITH RETARD
Fig. 6
Break out thin section of cover when wiring both switches from one
conduit entrance.
DWG# 1205-4
Testing
The frequency of inspection and testing for the Model VSR-ST and its
associated protective monitoring system should be in accordance with
applicable NFPA Codes and Standards and/or the authority having
jurisdiction (manufacturer recommends quarterly or more frequently).
If provided, the inspector’s test valve, that is usually located at the end
of the most remote branch line, should always be used for test purposes.
If there are no provisions for testing the operation of the flow detection
device on the system, application of the VSR-ST is not recommended
or advisable.
A minimum flow of 10 GPM (38 LPM) is required to activate this device.
Maintenance
Inspect detectors monthly for leaks. If leaks are found, replace the detector.
The VSR-ST waterflow switch should provide years of trouble-free
service. The retard and switch assembly are easily field replaceable. In
the unlikely event that either component does not perform properly, please
order replacement retard switch assembly stock number 1029030. There
is no maintenance required, only periodic testing and inspection.
PRINTED IN USA
Important Notice
Please advise the person responsible for testing of the fire protection system
that this system must be tested in accordance with the testing instructions.
Removal
• To prevent accidental water damage, all control valves should be
shut tight and the system completely drained before waterflow
detectors are removed or replaced
• Turn off electrical power to the detector, then disconnect wiring
• Loosen union nut and separate unit from the glued in fitting.
• Gently lift the unit far enough to get your fingers under it. With
your fingers, roll the vane so it will fit through the fitting while
continuing to lift the waterflow detector.
• Lift detector clear of pipe
MFG. #5401204- REV F
12/08
PAGE 3 OF 3