System-sensor LFD Models Manual de usuario descargar pdf

Specifications

Contact Ratings: 0.6 A @ 125VAC; 2 A @ 30VDC

Triggering Threshold Bandwidth

(Flow Rate): 3 gpm maximum

Static Pressure Rating: 450 PSI (Max)

Dimensions, Installed: 3.5″H x 3.0″W x 6.7″D

Operating Temperature Range: 32°F to 120°F (0°C to 49°C)

Compatible Pipe: See Low Flow models listed below

Shipping Weight: 4 to 7 lb., according to size.

Enclosure Rating: NEMA Type 4

Voltage Range: 8.4–35 V (DC–FWR); 108–132 VAC

Power Requirements: 300µA at 12 and 24 V (DC–FWR) or

400µA at 120 VAC

U. S. Patent Number: 3,845,259; 6,084,521; 6,275,160

Panel Compatibility:

The LFD waterflow indicators may receive power and operate on a two-

wire initiating zone of a fire alarm control panel. When determining com-

patibility of these devices, the standby operating voltage of the control

panel must be between 8.5 and 35 volts. In the standby mode, the LFD

draws a maximum current of 0.3mA. In alarm, the LFD acts as a short

across the initiating zone (similar to a manual fire box). For two wire

conventional fire alarm control panels, not more than 5 waterflow

indicators may be connected to a single initiating zone. The maximum

retard/reset time of the waterflow indicator plus the initiating zone shall

not exceed 90 seconds.

For two wire addressable control panels, the number of waterflow indi-

cators connected to the panel’s signaling line circuit shall be limited

only by the circuit’s current capacity.

D770-30-00 1 I56-1620-002R

LFD Accuflow

™

Low Flow

Vane-type Waterflow Detector

with Solid State Time Retard

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

www.systemsensor.com

Important

Please Read Carefully And Save

This instruction manual contains important information about the instal-

lation and operation of waterflow detectors. Purchasers who install water-

flow detectors for use by others must leave this manual or a copy of it with

the user.

Read all instructions carefully before beginning. Follow only those instruc-

tions that apply to the model you are installing.

Use vane-type waterflow detectors in wet-pipe systems only. Do NOT use

them in dry pipe, deluge, or preaction systems. The sudden inrush of

water in such systems may break the vane or damage the mechanism.

Do not use in potentially explosive atmospheres. Do not allow unused

wires to remain exposed.

Principles Of Operation

Vane-type waterflow detectors mount to water-filled pipes in sprinkler sys-

tems. Waterflow in the pipe deflects a vane, which produces a switched

output–usually after a specified delay. All waterflow detectors have a con-

trolled delay mechanism. Delays do NOT accumulate; they reset if the

flow of water stops before the entire delay has elapsed. All switches actu-

ate when the water flow rate is 3 gallons per minute or greater. This

System Sensor installation manual covers the following waterflow detec-

tors for sprinkler/fire alarm applications.

Low Flow Models Nominal Pipe O.D. Nominal Wall Thickness

LFD20 2″ (60.3mm) 3.9mm to 4.5mm

LFD25-73MM 2

⁄

″ (73.0mm) 4.8mm to 5.2mm

LFD25-76MM 2

⁄2″ (76.0mm) 4.3mm to 4.7mm

LFD30-2 3″ (88.9mm) 5.0mm to 5.6mm

LFD40 4″ (114.3mm) 5.4mm to 6.4mm

The LFD models are approved for use on stainless steel and brass pipe

only.

Do NOT use any of the LFD models on any other pipe materials.

Do NOT install steel or iron pipe sections in copper piping for mounting a

waterflow detector. Incompatibility between the dissimilar metals causes

bimetallic corrosion.

CAUTION

Installation Guidelines

Before installing any waterflow alarm device, be thoroughly familiar with:

NFPA 72: National Fire Alarm Code

NFPA 13: Installation of Sprinkler Systems

NFPA 25: Inspection, Testing and Maintenance of Sprinkler Systems

NFPA 750: Water Mist Fire Protection Systems

Other applicable NFPA standards, local codes, and the requirements of the

authority having jurisdiction

NOTE: Installation methods other than those listed in this installation

manual may prevent the device from reporting the flow of water

in the event the associated sprinkler system is activated by a

fire. System Sensor is not responsible for devices that have been

improperly installed, tested, or maintained.

1. Mount the detector where there is adequate clearance for installation

and removal and a clear view of it for inspections. See Figure 1 for

mounting dimensions.

Locate detector 6 to 7 ft. above the floor to protect from potential damage

3. On horizontal runs, position the detector on the top or side of the pipe.

Do not mount it upside down because condensation may collect in the

housing and impair the operation of the detector. For vertical flow

applications, mount the detector on pipe through which water flows

upward. Otherwise, the unit may not operate properly.

4. Mount the detector at least 6 inches from a fitting that changes the

direction of water flow and no less than 24 inches from a valve

or drain.

5. Be sure the direction-of-flow arrow matches the direction of flow in

the pipe.

Mounting Instructions

1. Drain the pipe.

2. Cut a hole at the desired location. Center the hole in the pipe, as

shown in Figure 2, and be sure the hole is perpendicular to the center

of the pipe. Before drilling, use a punch or scribe to mark the drill site

to prevent the bit from slipping. If the hole is off center, the vane will

bind against the inside wall of the pipe. Use a drill or hole saw to cut

a hole of the proper diameter. See Table 1 for hole size.

When drilling the hole with a hole saw, make certain that the center of the

cut does not remain in the pipe.

3. Remove burrs and sharp edges from the hole. Clean and remove all

scale and foreign matter from the inside of the pipe for one diameter

on each side of the hole to ensure free movement of the vane. Clean

the outside of the pipe to remove dirt, metal chips, and cutting lubri-

cant.

CAUTION

1 2 3 4

Indice de contenidos

Pagina 1 - Vane-type Waterflow Detector

SpecificationsContact Ratings: 0.6 A @ 125VAC; 2 A @ 30VDCTriggering Threshold Bandwidth(Flow Rate): 3 gpm maximumStatic Pressure Rating: 450 PSI (Max

Pagina 2 - 30-2, 40 55 - 60 ft-lb

4. Seat the gasket against the saddle and mount the detector directly tothe pipe. Carefully roll the vane opposite the direction of flow andinsert it

Pagina 3 - INTELLIGENT

Break wire as shown forsupervision of connection.DO NOT allow stripped wireleads to extend beyond switch housing. Do NOTloop wires.D770-30-00 3 I56-16

Pagina 4 - ON 1 2 3

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