System Sensor AFDT, AFDTH User Manual

Figure 1. Mounting dimensions:

A78-1939-01

Specifications

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

(Flow Rate): 4–10 GPM Static Pressure Rating: 250 PSI (Max.) Dimensions, Installed:

AFDT– 4

⁄16″H × 33⁄4″W × 63⁄4″D

AFDTH– 4

⁄16″H × 39⁄16″W × 63⁄4″D Operating Temperature Range: 32°F - 120°F (0°C - 49°C) Shipping Weight: 2.6 lbs. Enclosure Rating:

AFDT– NEMA Type 4, as tested by

Underwriters Laboratories, Inc. (U.L.)

AFDTH– Indoor use only, as tested by U.L. Voltage Range: 8.4–35 V (DC–FWR); 108–132 VAC Power Requirements: 300 µA at 12 or 24 V (DC–FWR);

400 µA at 120 VAC

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

D770-34-00 1 I56-1621-004R

AFDT/AFDTH Accuflow™

Vane-type Waterflow Detectors with Solid State 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 installation and operation of waterflow detectors. Purchasers who install waterflow detectors for use by others must leave this manual or a copy of it with the user. Read all instructions carefully before beginning.

Use vane-type waterflow detectors in wet-pipe systems only. DO NOT USE IN DRY-PIPE, DELUGE, OR PRE-ACTION SYSTEMS. The sudden inrush of water in such systems may break the vane off or damage the mechanism. Do not use in potentially explosive atmospheres. Do not leave unused wires exposed.

Principles Of Operation

Vane-type waterflow detectors mount to water filled pipes in sprinkler systems. Water flow in the pipe deflects a vane. Deflection of the vane produces a switched output, usually after a specified delay. All AFDTs have a controlled delay mechanism. Delays are noncumulative; they reset if the flow of water stops before the entire delay has elapsed. All detectors will activate on a sustained flow of water greater than 10 gallons per minute (gpm) but will not activate if the flow rate is less than 4 gpm.

Compatible Pipe Tees/Risers

The AFDT and AFDTH fit 1″ to 1

⁄2″ NPT threaded ferrous and

brass, 1″ to 2″ sweat brass, 1

⁄2″ polybutylene plastic and 1″ cpvc plastic tees having a 1″ threaded NPT branch (see Figure 1 and chart for recommended tee depths). For 2″ cast and malleable threaded tees use 2″ paddle ( P02-0023-000) provided.

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 13D: Standard for 1 and 2 Family Dwellings and

Manufactured Homes

NFPA 13R: Standard for Residential Occupancies up to and

including Four Stories in Height

NFPA 25: Inspection, Testing, and Maintenance of Water-

based Fire Protection Systems

The AFDTH can be installed between 2X4 stud wall construction.

Panel Compatibility:

The AFD waterflow indicators may receive power and operate on a two-wire initiating zone of a fire alarm control panel. When determining compatibility of these devices, the standby operating voltage of the control panel must be between 8.5 and 35 volts. In the standby mode, the AFD draws a maximum current of 0.3 mA. In alarm, the AFD 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 indicators connected to the panel’s signaling line circuit shall be limited only by the circuit’s current capacity.

Approximate Tee Depth Requirements

Tee Depth Threaded Sweat Poly B CPVC

1 × 1 × 1″ 11/4 × 11/4 × 1″ 11/2 × 11/2 × 1″

2 × 2 × 1"

21/8″ 21/2″ 23/4″

/4″

Tee Adapter

Tee Depth

Refer to

Tee Depth

Table

(See Figure 1)

13/4″ N/A 21/4″

/6″ N/A

2 21/4″ 23/4″

33/4

(AFDT)

(AFDTH)

N/A

21/2″

N/A N/AN/A

/16

CPVC/Spears/

Victaulic

/32″ 213/16″ N/A N/A

/16

Gage (End of Paddle Tree) Must Fit Between Top of Tee and Bottom of Flange

Tee Fitting

Plastic Vane

CPVC/Central

N/A N/A N/AN/A

Also, follow 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 inspection. See Figure 1 for mounting dimensions.

Figure 2. Assembly diagram:

height gage (located at end of paddle tree) to ensure proper depth of detector on tee fitting. See Figure 1. Height gage must fit between top of tee fitting and under side of hex tee adapter. A gap between gage and tee adapter is acceptable. When correctly installed, the detector must face in the proper direction of waterflow and be aligned with the pipe.

4. Remove the metal cover. Move the actuator lever back and forth to check for binding. If the vane binds, remove the detector and correct the problem before proceeding.

Be sure the direction-of-flow arrow points in the right direction, otherwise a waterflow condition will go unreported. See Figure 2.

Preoperation

Fill the sprinkler system with water and check for leaks around the AFDT or AFDTH. If there is a leak, check to see that the fittings are tight. If leak persists, drain the system and remove the detector (see removal instructions under Maintenance). Check for damaged threads or cracked fitting. Reinstall the detector and check again for leaks. Do not proceed until all leaks have been stopped.

Wiring

High Voltage. Electrocution Hazard. Do not handle live AC wiring or work on a device to which AC power is applied. Doing so may result in injury or death.

1. All models have two wires and two sets of terminals. Relay Wires (W1 & W2 designated on PCB): These wires are connected to a latching normally open (as in No Flow) relay contact. They are isolated from all electronics. They will close and cause a short when water flows and the retard time elapses. They will remain shorted until waterflow stops. Once waterflow stops, these contacts will re-open. Power Terminals (T2 designated on PCB): This is a TWO screw terminal block. The Accuflow gets its power from these terminals. These terminals must have voltage present from the FACP or other suitable source of power before anything will work. If no power is present, the Accuflow will not provide proper alarm signals. These terminals will accept power in any polarity as well as AC-line power. Aux Relay Terminals (T1 designated on PCB): This is a THREE screw terminal block. These terminals are connected to a latching Form C relay. In no flow conditions, COM is connected to A. When flow is detected COM will disconnect from A and connect to B. This relay will latch in that state and reset after water stops flowing. See Figures 3 - 8 for specific wiring instructions.

2. Adjust Dip Switch to desired time delay. See Figure 11. For Dip Switch location, see Figure 2.

3. When connected to a listed sprinkler/fire alarm control panel, the initiating circuit must be nonsilenceable.

4. A ground screw is provided with all waterflow detectors. When grounding is required, clamp wire with screw in hole located between conduit entrance holes. See Figure 9, page 4.

5. If a second conduit entry is required, remove the knockout plug using a flat blade screwdriver as shown on Figure 10, page 4. Strike sharply with a hammer to pierce the wall of the knockout plug. Move to an adjacent wall section and repeat until the plug falls out. Make sure that the waterflow detector is supported adequately during this operation to avoid injury.

NOTE: Power terminals must be connected to FACP or other

non-silenceable initiating circuit.

WARNING

D770-34-00 2 I56-1621-004R

A78-2134-05

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

3. On horizontal runs, position the detector on top of the pipe or on the side of it. 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 detector on pipe where upflow conditions exist. Failure to do so may prevent unit from operating properly.

4. Mount detector at least 6 inches from a fitting which changes the direction of the water flow, or no closer than 24 inches from a valve or drain.

5. BE SURE DIRECTION-OF-FLOW ARROW MATCHES ACTUAL DIRECTION OF FLOW IN THE PIPE.

Mounting Instructions

1. The AFDT and AFDTH waterflow detectors are designed to fit only the appropriate tee fitting.

NOTE: Leg of tee perpendicular to flow of water must have a 1”

NPT thread. Do not use a reducer to achieve the correct thread size. Failure to follow this instruction will result in failure of the detector to report a waterflow condition.

2. AFDT and AFDTH units are shipped without paddles mounted to the actuator. Select the correct size paddle for the type of tee being used. Align hole on stem of paddle with hole on actuator lever. Fasten together using a #4-40 x 1/4” fillister head screw supplied in bag assembly. See Figure 2. Use only the screw provided with the unit. Drive screw head through hole in paddle until it seats to actuator lever surface. No washer is required. For paddle replacement refer to Maintenance section.

3. Carefully roll the vane opposite the direction of flow and insert through tee. Thread detector onto tee fitting and tighten with wrench. Use of thread sealant or tape is recommended. Use

COVER

TAMPER PROOF WRENCH (P/N WFDW)

DIP SWITCH

GROUND SCREW

GASKET (AFDT ONLY)

FLOW

WATERFLOW

FILLISTER HEAD SCREW

1″ NPT THREAD

ACTUATOR LEVER

(GREEN)

MOUNTING PLATE

PADDLE (PADDLE REPLACEMENT KIT P/N PRK9)

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