preaction system, double interlock

c ‘. . .

A G 8 PREACTION SYSTEM, DOUBLE INTERLOCK ELECTRIC/ELECTRIC RELEASE

MODEL F470 - 4 and 6 INCH (100 and 150 mm)

rl -12

E 20 6, -

14- Alarm Bell 15- Heat Detectors (or other fire

l- Model F470 External Resetting Multimatic Deluge Valve

Z- Model F52O/F5201 Swing Check Valve

3- System Main Control Valve (supervised in open position)

4- System Shut-Off Valve (supervised in open position)

5- Solenoid Valve 6 Low Air Pressure Alarm Switch 7- Diaphragm Chamber Pressure

Gauge 8- Waterflow Pressure Alarm Switch 9- Manual Control Station IO- Automatic Air/Nitrogen Pressure

Maintenance Device 1 l- Water Motor Alarm (optional) 12- Cross-Zone Deluge Valve

Releasing Panel with Battery Back-Up-

13- Manual Pull Station (as required)

detection devices) 16- Automatic Sprinklers 17- Water Supply Pressure Gauge 18- System Air Pressure Gauge 19- F470 Main Drain Valve 20- F52O/F5201 Main Drain Valve 21- Diaphragm Chamber Supply

Control Valve

A- Power Supply To Panel B- Audible Alarm Circuit C- Fire Detection Initiating Circuit

(Zone 1) D- Manual Pull Initiating Circuit

(Zone 1) E- Low Pressure Alarm Initiating

Circuit (Zone 2) F- Releasing Circuit G- Waterflow Alarm Initiating Circuit

FIGURE A MODEL F470 ELECTRIC/ELECTRIC

DOUBLE INTERLOCK PREACTION SYSTEM - SCHEMATIC OF TYPICAL ARRANGEMENT-

The 4 and 6 inch (100 and 150 mm) Model F470 Electric/Electric Double Interlock Preaction Systems (Ref. Fig- ure A) are designed for use in applica- tions, such as refrigerated areas, re- quiring the maximum degree of protection against inadvertent flooding of the sprinkler system piping.

The F470 Electric/Electric Double In- terlock Preaction System utilizes a Model F470 External Resetting Muti- matic@ Deluge Valve and a Model F520 or F5201 Swing Check Valve. The Swing Check Valve isolates the Deluge Valve from the system air pressure. The releasing trim for the Deluge Valve utilizes a Solenoid Valve which is operated by energizing the releasing circuit of a Cross-Zone Deluge Valve

Zone 1 of the Releasing Panel is operated by either a fire detection device or manual pull station. Zone 2 of the Re- leasing Panel is operated by a Low Air Pressure Alarm Switch in response to a loss of system air pressure due to the opening of an automatic sprinkler. The Solenoid Valve remains closed until it

Printed in U.S.A. 1 l-97 TD1153

Releasing Panel (automatic control unit).

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is electrically energized by the Releas- ing Panel.

In order for the Double Interlock Pre- action System to automatically actuate, two independent events must occur. Zone 1 of the Releasing Panel must operate upon automatic operation of the electric fire detection initiating circuit or manual operation of the electric-manual pull initiating circuit, and Zone 2 of the Releasina Panel must operate via the Low Air P;essure Alarm Switch upon loss of air pressure from the sprinkler system piping, due to operation of one or more sprinklers.

The Double interlock Preaction Sys- tem will automatically actuate only when both Zone 1 and Zone 2 of the Releasing Panel have operated, which in turn will energize the Solenoid Valve. Accidental loss of system air pressure (for example: a lift truck accidentally dislodges a sprinkler), or operation of just the fire detection circuit (for example: an accidental operation of an electric pull station), will only cause an alarm, and will not actuate the system or flood the sprinkler system piping.

The 4 and 6 inch (100 and 150 mm) Model F470 Electric/Electric Double Interlock Preaction Systems are listed by Underwriters Laboratories Inc. and Underwriters’ Laboratories of Canada as Double Interlock Type Water Con- trol Valves, and they are approved by Factory Mutual Research Corporation as Refrigerated Area Systems for use in refrigerated rooms or buildings.

WARNING The 4 and 6 inch Model F470 Double Interlock Preaction Systems with the associated trim described herein must be installed and maintained in com- pliance with this document, as well as with the applicable standards of the National Fire Protection Association, in addition to the standards of any other Authorities Having Jurisdic- tion. Failure to do so may impair the integrity of the associated devices.

The owner is responsible for main- taining their fire protection system and devices in proper operating condition. The installing contractor OF

manufacturer should be contacted relative to any questions.

The 4 and 6 inch (100 and 150 mm) Model F470 Electric/Electric Double Interlock Preaction Systems, as well as their associated trim, are rated for use at a minimum service pressure of 20 psi (1,4 bar) and a maximum service pressure of 175 psi (12,l bar).

The following is a list of the Technical Data Sheets for the valves and devices which are required as part of the Double Interlock Preaction System:

Deluge Valve . . . . . . . TDI 16

Swing Check Valve . . . . . TD320

Solenoid Valve . . . . . . . TD119

Manual Control Station . . . TD121

Low Air Pressure Alarm Switch . . . . . . . . . . . . TD213

Waterflow Pressure Alarm Switch . . . . . . . . . . . TD213

The following is a list of the Technical Data Sheets for the recommended system pressure maintenance devices to be used as part of the Double Inter- lock Preaction System:

System Pressure Maintenance De- vice (select one)

-Air Pressure Reducing Type . . . . , . . . . . . . . . TD111

-Nitrogen Press. Reducing Type . . . . . . . . . . . . . . TD113

System Design Considerations The automatic sprinklers, as well as the cross-zone deluge valve releasing panel (automatic control unit), fire detection devices, manual pull stations, and signaling devices, which are utilized with the Electric/Electric Double Interlock Preaction System must be UL Listed, ULC Listed, C-UL Listed, or FM Approved, as applicable.

Because a double interlock preaction system requires time for a drop in system air pressure to occur (concurrently with the response timeforthe separate fire detection system), before it will allow water to enter the system piping, this system has characteristics similar to a dry pipe sprinkler system. There- fore, the system design considerations for a dry pipe system are normally ap- plied to a double interlock preaction system - including a 30% increase in design area; a maximum 1 minute water delivery time for system capaci- ties of 750 gallons (2800 litres) or more; and, prohibition of gridded system piping.

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The deluge valve, swing check valve, and all interconnecting piping must be located in a readily visible and acces- sible location and in an area which can be maintained at a minimum temperature of 4O”F/4”C.

NOTE Heat tracing is not permitted for the deluge valve, swing check valve, OF

any of the interconnecting piping. Heat tracing can promote the forma- tion of hardened mineral deposits which can prevent system operation. Heat tracing can also result in damage to the F470 Deluge Valve Dia- phragm Assembly.

In planning the installation, considera- tion must also be given to the disposal of the large quantities of water which may be associated with draining the system or performing a flow test.

Installation configuration and clearance dimensions are given in Figure B. The flanged inlet and outlet connections are faced and drilled per ANSI Standard 816.1. The grooved outlet connection of the F5201 Swing Check Valve is cut in accordance with Gru- vlok standard groove specifications for steel pipe, and they are suitable for use with grooved end pipe couplings that are listed or approved for fire protection service.

In order to readily perform the System Inspection Procedure described in the Care and Maintenance section, it is recommended that a System Shut-Off Valve be installed above the Model F52OtF5201 Swing Check Valve, as shown in Figure A. The System Shut- Off Valve should be a listed or approved (as appropriate) indicating valve with a supervisory switch to monitor the normally open position.

System Air Pressure Requirements The recommended system air pressure for the Electric/Electric Double Interlock Preaction System is nominally 15 psi (1,0 bar), irrespective of the water supply pressure. The use of a higher system air pressure may increase water delivery time, and the use of a lower system air pressure may prevent clearing the alarm of the Low Air Pressure Alarm Switch (Item 16 - Fig. C) on increasing pressure. The Low Pressure Alarm Switch is field set to alarm at nominally 12 psi (0,8 bar) on decreasing pressure. It is recommended that the system air pressure be maintained by either of the following methods.

A maximum 200 psi (13,8 bar) plant air supply in combination with the Model F324 Air Maintenance Device described in TDl 11.

A maximum 3000 psi (206,9 bar) nitrogen cylinder in combination with

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IQ” NPT AIR SUPPLY CONNECTION

DIAPHRAGM CHAMBER SUPPLY CONNECTION

Nominal Dimensions in Inches and (mm)

NOTES: (a.)Minimum clearance, additional 2’ (50 mm) is recommended. (b.)Refer to Technical Data Sheet TD116 for additional installation dimensions.

FIGURE B INSTALLATION CONFIGURATION AND CLEARANCE DIMENSIONS

the Model F328 Nitrogen Mainte- sure, i.e., a pressure maintenance de- nance Device described in TD113. vice that utilizes a pressure regulator

versus a pressure switch (e.g., the NOTES F324 OF F328). Use of a pressure

It is recommended that the pressure switch operated pressure mainte- maintenance device he of a type that nance device with a cut-in/cut-out maintains a constant system pr-es- differential may result in a delay in

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the operation of the system due to a fire, because of the cut-out pressure being higher than the recommended nominal system air pressure.

The dew point of the air OF nitrogen must be maintained below the lowest ambient temperature to which the Double Znterlock Pt-eaction System piping will be exposed, OF as required by the Authority Having Jurisdiction. Zntroduction of moisture into the system piping that is exposed to freezing temperatures can create ice build up which could prevent proper operation of the system.

Friction Loss The nominal pressure losses versus flow rate for the 4 and 6 inch (100 and 150 mm) combinations of the Model F470 Multimatic Valve with either the Model F520 or F5201 Swing Check Valve are shown in Graphs A-l and A-2.

The approximate friction losses, based on the Hazen and Williams for- mula and expressed in equivalent length of Schedule 40 pipe, are given below for each size deluge and swing check valve combination. The equivalent length of pipe has been calculated on the basis of the flow rates typically used with each size system.

SIZE OF c = 100 c=120 VALVES FT. OF PIPE FT. OF PIPE

4” 18.2 25.5

6” 26.4 36.9

Electric/Electric Double Interlock PreactionTrim (Ref. Figure C) The nipples utilized in the trim arrangement are Schedule 40 steel per ASTM A53 or Al 35 and they are threaded per ANSI Standard 81.20.1. Fittings are either malleable iron per ANSI 816.3 or cast iron per ANSI 816.4. “Standard order” trim is provided with black nipples and fittings; however, galvanized nipples and fittings are available on “special order”.

The Low Air Pressure Alarm Switch (Item 16) is field set at nominally 12 psi (0,8 bar) on decreasing pressure. A complete description of the switch is provided in Technical Data Sheet TD213. The Pressure Relief Valve (Item 3) is typically field set to crack open at a pressure of about 20 psi (1,4 bar).

Fire Department Connection When installing a fire department connection per NFPA 13 for preaction systems, a tee fitting (to accommodate the supply from the fire department connection) will be required between the F470 Deluge Valve and the F52O/F5201 Swing Check Valve.

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. . .

300 400 500 700 low 2cm 3om 1OGG zoo0 3ooa so00 7wo loo00

FLOW RATE IN U.S. GALLONS PER MINUTE (GPM) FLOW RATE IN LITRES PER MINUTE (LPM)

GRAPH A-l GRAPH A-2

GRAPHS A-l and A-2 NOMINAL PRESSURE LOSS VERSUS FLOW

FOR THE MODEL F470 DOUBLE INTERLOCK PREACTION SYSTEM (DELUGE VALVE AND CHECK VALVE COMBINATION)

As indicated in the General Descrip- tion section, two independent events resulting in operation of both Zone 1 and Zone 2 of the Cross-Zone Releas- ing Panel must occur to actuate the Model F470 Electric/Electric Double Interlock Preaction System.

diaphragm chamber and the differential between the diaphragm chamber and waterway is eliminated. The water supply pressure then forces the waterway clapper open, permitting a flow of water to the Double Interlock Preac- tion System piping. Water flowing into the system also flows through a normally open Alarm Control Valve to the Waterflow Pressure Alarm Switch (8- Fig. A), which actuates the system alarm signal.

NOTES

When the Double Interlock Preaction System is set for service, the diaphragm chamber of the Model F470 Deluge Valve is pressurized through the diaphragm chamber supply connection (Fig. 6). The Model F470 Del- uge Valve is a differential type valve which depends upon the water pressure in the diaphragm chamber to hold the clapper closed against the water supply pressure. The Model F470 Del- uge Valve has a nominal trip ratio of 2.5 to 1, i.e., the valve operates when pressure in the diaphragm chamber is reduced to approximately two-fifths of the water supply pressure.

Field adjustments of the Air Mainte- nance Device, Low Pressure Alarm Switch, and Pressure Relief Valve are required. The Air Maintenance Device and the Low Pressure Alarm Switch should be set as close as possible to the specified settings in order to minimize water delivery time.

The Double Interlock Preaction Sys- tem will automatically actuate only when both Zone 1 and Zone 2 of the Cross-Zone Releasing Panel have operated, which in turn will energize the Solenoid Valve. Accidental loss of system air pressure (for example: a lift truck accidentally dislodges a sprinkler), or operation of just the fire detection circuit (for example: an accidental operation of an electric pull station), will only cause an alarm, and will not actuate the system or flood the sprinkler system piping.

The Model F470 External Resetting Deluge Valve is described in TD116.

When using compressed air as op- posed to compressed nitrogen for refrigerated area service, alternate air supply connections with an air dryer may be required by the Authority Having Jurisdiction. The “1 I2 Inch NPT Connection For Automatic Air Supply” shown in Figure C is to be plugged when using an alternate air supply connection; the location of the Air Pressure Maintenance is to be as specified by the Authority Having Ju- risdiction; and, Step 8 regarding the adjustment of the Pressure Relief Valve can be omitted, since the Pres- sure Relief Valve in this case will be ineffective.

Operation of the Solenoid Valve (5 - Heat tracing is not permitted for the Fig. A) or operating the Manual Control deluge valve, swing check valve, or Station (9 - Fig. A) will release water any of the interconnecting piping. from the Multimatic Valve diaphragm Heat tracing will promote the forma- chamber faster than it can be replen- tion of hardened mineral deposits ished through an l/8 inch (3,2 mm) which can prevent valve operation. diameter orifice located in the dia- Heat tracing can also result in dam- phragm chamber supply connection. A age to the F470 Deluge Valve Dia- rapid pressure drop then results in the phragm Assembly.

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1. 250 lb. Air Pressure Gauge

2- 114” Gauge Test Valve

3. l/4” Relief Valve

4. l/Z” Globe Valve

5. 112” Swing Check Valve

6- 2” Angle Valve 7. 114” Plug 8- l/Z” Union 9- 112” 45” Elbow

lo- 112” 90” Elbow ll- l/2”” Tee 12- 112” x l/2” x l/4”

Tee 13. l/4” x 4”Nipple 14- 112” x l-1/2” Nipple

(7 req’d) 15- 2” x 2-112” Nipple 16- Pressure Alarm

Switch (2 req’d’) 17- Label

, RFL IEF V4LVE

’ 112 NPT CONNECTION FOR AUTOMATK AIR SUPPLY

/ - SYSTEM

AIR PRESSUR GAUGE

AIR SUPPLY CONTROL VALVE (NORMALLY OPEN)

LOW AIR PRESSURE ALARM SWITCH (TO BE CONNECTED TO THE ZONE 2 INITIATING CIRCUIT OF THE CROSS-ZONE RELEASING PANEL)

l One of the two switches is being provided to be utilized as a waterflow pressure alarm switch for the

FROM MODEL F470 DELUGE VALVE WITH ELECTRIC ACTUATION TRIM

E

F470‘ Electric Actuation Trim (Ref. 8 - Fig. A)

FIGURE C 4 and 6 INCH (100 and 150 mm) ELECTRIC/ELECTRIC DOUBLE INTERLOCK PREACTION TRIM

The deluge valve, swing check valve, and all interconnecting piping must be installed in a readily visible and acces- sible location and in an area which can be maintained at a minimum temperature of 4O”F/4”C.

The 4 and 6 inch (100 and 150 mm) Electric/Electric Double Interlock Pre- action Systems must be installed in accordance with the following instructions. Proper operation of the Double Interlock Preaction System depends upon it being installed in accordance with the instructions given below. Fail- ure to follow these instructions may prevent the devices from functioning properly as well as void listings, ap- provals, and the manufacturer’s war- ranties.

1. All pipe thread connections must be free of scale and burrs before installation. Use pipe thread sealant sparingly on male pipe threads only.

2. The F470 Deluge Valve must be installed vertically as shown in Fig- ures A and B.

3. To attach the lower flange of the F520 or F5201 Check Valve to the upper flange of the F470 Deluge Valve, as shown in Figure B, at least four out of the eight required flange fasteners must be stud bolts and nuts. The stud bolts must be 5/8”-11 UNC x3-1/4” long for 4 inch (100 mm) valves and 3/4”-10UNC

x 3-3/4” long for 6 inch (150 mm) valves.

4. Install the Electric Actuation Trim as specified byTD116 and then the Preaction Trim as shown in Figure C.

Care must be taken to make sure that check valves, globe valves, etc. are installed with the flow ar- rows in the proper direction.

Drain tubing to the Drip Funnel must be installed with smooth bends that will not restrict flow.

5. Attach the Model F470 Elec- tric/Electric Double Interlock Label (17-Fig. C) to the 2 inch high x 4 inch (50 x 200 mm) wide nameplate mounting pad on the Hand- hole Cover of the F52O/F5201 Swing Check Valve. Place the La- bel over the manufacturer’s logo nameplate, if one is located on the pad.

6. The Diaphragm Chamber Supply Connection (Fig. B) must be connected to the water supply side of the System Main Control Valve to facilitate setting of the F470 Del- uge Valve.

7. Install a compressed air or nitrogen supply via an automatic air or nitrogen maintenance device to the Air Supply Connection (Fig. B) or as specified by the Authority

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Having Jurisdiction for refrigerated area service. Adjust the pressure maintenance device to maintain nominally 15 psi (1 ,O bar).

8. Adjust the Pressure Relief Valve (3-Fig. C), as applicable, to crack open at approximately 20 psi (1,4 bar). As shipped, it is set to open at approximately 45 psi (3,1 bar).

To reset the Pressure Relief Valve, first loosen the jam nut and then adjust the cap accordingly - clockwise for a higher pressure setting or counterclockwise for a lower pressure setting. After verify- ing the desired pressure setting, tighten the jam nut.

9. Adjust the Low Pressure Alarm Switch (16-Fig. C) to transfer the electrical contacts at nominally 12 psi (0,8 bar) on decreasing pressure. As shipped, the switch is set to transfer the electrical contacts at approximately 5 psi (0,3 bar) on decreasing pressure.

Use the instructions provided with the switch to adjust the pressure setting.

10. Suitable provision must be made for disposal of drain water. Drain- age water must be directed such that it will not cause damage or result in dangerous conditions.

11. All conduit and electrical connec-

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tions are to be made in accordance with the requirements of the Authority Having Jurisdiction and/or the National Electrical Code.

NOTES The heat detection devices are to be connected to the Zone 1 initiating circuit contacts of the Cross- Zone Deluge Value Releasing Panel.

The Low Air Pressure Alarm Switch contacts are to be connected to the Zone 2 initiating circuit contacts of the Cross-Zone Deluge Valve Releasing Panel.

A. Immediately verify whether or not a fire situation is present. If a fire condition does exist, notify the lo- cal fire service and follow the plan prescribed by the Authority Having Jurisdiction.

B. If a fire condition does not exist:

1. Close the Diaphragm Chamber Supply Control Valve (21 - Fig. A).

2. Close the system’s Main Control Valve (3 - Fig. A).

3. Open the F470 Main Drain Valve (19 - Fig. A).

4. If the system has been flooded, open the F52O/F5201 Main Drain Valve (20 - Fig. A), Inspector’s Test Connection, and all auxiliary drains in the system piping. Check to see that the drainage water will not cause damage or result in dangerous conditions.

5. Notify the alarm monitoring stations (if applicable) as well as the Authority Having Jurisdiction that there is an impairment to the fire protection system.

6. Determine if the false alarm was caused by the electric fire detection system or a low air pressure condition and then promptly cor- rect the impairment and return the fire protection system to service, as soon as possible.

The Double Interlock Preaction Sys- tem will not automatically reset after an operation. It must be manually reset and it should be restored to service as soon as possible.

NOTES It is recommended that the individual responsible for placing the Double Zn- terlock Preaction System in service develop a working understanding of the system in general, prior to placing it in operation. These instructions, as well as individual instructions for the deluge valve, swing check valve, solenoid valve, manual control station, switches, and pressure maintenance device should be reviewed.

After placing a fire protection system in service, notify the proper authorities and advise those responsible for monitoring proprietary andlor central station alarms.

The procedure is as follows:

1. Close the Diaphragm Chamber Supply Control Valve (21 - Fig. A).

2. Close the Main Control Valve (3 - Fig. A), and close the Air Supply Control Valve.

3. Open the F470 Main Drain Valve (19 - Fig. A), the F52O/F5201 Main Drain Valve (20 - Fig. A), and all auxiliary drains. Close the auxiliary drain valves and the F52O/F5201 Main Drain Valve after water ceases to discharge.

4. Replace all damaged or operated sprinklers. Replacement sprinklers must be of the same type and temperature rating as those which operated.

NOTE In order to prevent the possibility of a subsequent operation of an overheated solder type sprinkler, any solder type sprinklers which were possibly exposed to a temperature greater than their maximum rated ambient must also be replaced.

5. Service the air dryer, if applicable, in accordance with the manufacturer’s instructions.

6. If resetting after a test, fully open the System Shut-Off Valve (4 - Fig. A), if applicable.

7. Open the Air Supply Control Valve and the quick fill by-pass valve in the air maintenance device, where applicable, and allow the system air pressure of nominally 15 psi (1 ,O bar) to be established at which

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8.

9.

10.

point the quick fill by-pass valve in the air maintenance device where applicable, is to be closed. The Low Pressure Alarm Switch should return to its “normal” condition.

Reset the Releasing Panel (12 - Fig. A)

Reset the F470 Valve and open the Main Control Valve in accordance with Technical Data Sheet TDl16.

It is recommended that the Main Control Valve and the System Shut-Off Valve (if applicable) be locked in the full open position if they are not monitored by supervisory switches.

NOTE After placing a fire protection system in service, notify the proper authorities and advise those responsible for monitoring proprietary and/or central station alarms.

The Double Interlock Preaction Sys- tem is now set for service.

The Double Interlock Preaction Sys- tem requires regularly scheduled care and maintenance of its principle com- ponents, as described in their individual technical data sheets. In addition, it is recommended that the proper operation and condition of the system be periodically verified in accordance with the following described inspection procedure.

Any impairment to the system must be promptly corrected in order to maintain the integrity of the system.

It is recommended that the System Inspection Procedure be performed at least semi-annually by a qualified In- spection Service. The Double Inter- lock Preaction System Inspection Pro- cedure may be followed in lieu of performing any of the operational tests recommended in the Technical Data Sheets for the Model F470 Deluge Valve, Model F52O/F5201 Swing Check Valve, 24 VDC Solenoid Valve, Models PSIO-2A Pressure Switch, and Model F180 Manual Control Sta- tion.

NOTES 1. It is recommended that the indi-

viduals responsible for the care and maintenance of the Double Interlock Preaction System develop a working understanding of

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the system, in general, prior to performing inspection and /or maintenance procedures. These instructions, as well as individual instructions for the deluge valve, swing check ualve, solenoid valve, manual control station, switches, and pressure maintenance device should be reviewed.

2. The following procedures pertain to the automatic control valve portion of the Double Interlock Preaction System. Refer to the manufacturer’s instructions and NFPA 25 for care and maintenance procedures for all other devices (e.g., electric detection, main control and system shut-off valves, supervisory devices, sprinklers, etc.).

3. Before performing the System Zn- spection Procedure, which will result in operation of alarms, notify the proper authorities and all personnel who may be affected.

4. Before closing a fire protection system main control valve for maintenance work on the firepro- tection system which it controls, permission to shut down the affected fire protection system must be obtained from the proper authorities and all personnel who may be affected by this action must be notified.

System Inspection Procedure 1. Close the Main Control Valve (3 -

Fig. A) and then open the F470 Main Drain Valve (19 - Fig. A).

2. Manually operate Zone 1 of the Releasing Panel, and verify the following:

a. Verify the operation of the Releas- ing Panel and its associated alarms.

b. Verify that there is no leakage out the Solenoid Valve (5 - Fig. A).

NOTES During this procedure, the Sole- noid Valve should remain closed and the F470 Deluge Valve Dia- phragm Chamber should remain pressurized.

This procedure is used to verify that the F470 Deluge Valve will remain set if the electric detection system (Zone 1) operates but the sprinkler system (Zone 2) remains in its normally pressurized condition.

4. Restore the electric fire detection system to a normal condition in

accordance with the manufacturer’s instructions.

5. Open the Inspector’s Test Connec- tion to relieve system air pressure, and verify the following:

a. Verify that the Low Air Pressure Alarm Switch (16 - Fig. C) and Zone 2 of the Releasing Panel, as well as its associated alarms, operate properly. The Low Pressure Alarm Switch should operate at approximately 12 psi (0,8 bar).

b. Verify that there is no leakage out the Solenoid Valve (5 - Fig. A).

Close the Inspector’s Test Con- nection.

NOTES During this procedure, the Sole- noid Valve should remain closed and the F470 Deluge Valve Dia- phragm Chamber should remain pressurized.

This procedure is used to verify that the F470 Deluge Valve will remain set if the Low Pressure Alarm Switch (Zone 2) operates due to loss of system air pressure and the electric detection system (Zone I) remains in a normal condition.

6. Restore the electric fire detection system to a normal condition in accordance with the manufacturer’s instructions after the system air pressure has automatically been restored to normal.

7. Close the System Shut-off Valve (4 - Fig. A).

8. Open the Main Control Valve (3 - Fig. A) one turn beyond the position at which water just begins to flow from the F470 Main Drain Valve.

9. Close the F470 Main Drain Valve.

10. Close the Air Supply Control Valve.

11. Manually operate Zone 1 of the Releasing Panel, and then operate Zone 2 of the Releasing Panel by partially opening the F52O/F5201 Main Drain Valve (20 - Fig. C) to relieve air pressure at the Low Pressure Alarm Switch, and verify the following:

a. Verify that the F470 Deluge Valve operates, as is indicated by a discharge of water from the F52O/F5201 Main Drain Valve.

b. Verify that the Waterflow Pres- sure Alarm Switch (8-Fig. A) and

its associated alarms properly operate.

c. Verify that the Water Motor Alarm, if applicable, properly operates.

NOTE This procedure simulates automatic system operation upon both electric detection and loss of system air pressure.

12. Reset the Double Interlock Dry System in accordance with the System Setting Procedure section.

Seller warrants for a period of one year from the date of shipment (warranty period) that the products furnished hereunder will be free from defects in material and workmanship.

For further details on Warranty, see Price List.

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DELUGE VALVE

Specify: (specify size), Model F470 External Resetting Deluge Valve , PSN (specify).

4 Inch (100 mm) PSN 52-470-I-013 77 Ibs. (34.9 kg)

6 Inch (150 mm) PSN 52-470-l-015 111 Ibs. (50.3 kg)

Specify: (specify size), (specify model) Check Valve, PSN (specify).

SWING CHECK VALVE

4 Inch (100 mm), Model F520 Flange x Flange PSN 52-520-l-013 62 Ibs. (28,l kg)

6 Inch (150 mm), Model F520 Flange x Flange PSN 52-520-l-015 93 Ibs. (42.2 kg)

4 Inch (100 mm), Model F5201 Flange x Groove PSN 52-520-l-413 51 Ibs. (23.1 kg)

6 Inch (150 mm), Model F5201 Flange x Groove PSN 52-520-t-615 78 Ibs. (35,4 kg)

ELECTRIC\ELECTRIC Specify: (specify Black or Galvanized) 4 and 6 inch (100 and 150 mm) Electric\Electric Double

DOUBLE INTERLOCK Interlock Preaction Trim,

PREACTION PSN (specify).

TRIM “Standard Order” Black PSN 52-470-I -120 13 Ibs. (5,9 kg)

“Special Order” Galvanized . , . . PSN 52-470-2-120 13 Ibs. (5,9 kg)

Specify: Factory assembled’ (specify black or galvanized), Electric Actuation Trim for use with the Model F470 External Resetting Deluge Valve, PSN (specify)

ELECTRIC ACTUATION “Standard Order” Black . . . . . . PSN 52-470-l-103 33 Ibs. (15,O kg)

TRIM “Special Ordef Galvanized . PSN 52-470-2-103 33 Ibs. (15,O kg)

l The actuation trim is factory assembled as shown in TDI 16. Unassembled trim can be provided on “special order”.

AUTOMATIC PRESSURE 5

MAINTENANCE DEVICE

Select one of the following options and specify: (product name), PSN (specify).

Model F324 Air Maintenance Device (Pressure Reducing Type) PSN 52-324-i-002 6.5 Ibs. (2,9 kg)

Model F328 Nitrogen Maintenance Device , . . . . . . , . , _ , . PSN 52-328-I-001 3.7 Ibs. (I,5 kg)

TABLE A INDIVIDUAL COMPONENT ORDERING LIST

FOR 4 and 6 INCH (100 and 150 mm) ELECTRIC /ELECTRIC DOUBLE INTERLOCK PREACTION SYSTEMS

All orders must include the description and Product Symbol Number (PSN).

NOTES Heat detection equipment, including the Cross-Zone Deluge Valve Releas- ing Panel, and signaling devices must be separately ordered.

To attach the lowerflange of the F.520 or F5201 Check Valve to the upper flange of the F470 Deluge Valve, as shown in Figure B, at least four out of the eight required flange fasteners must be stud bolts and nuts. The stud bolts, which are to be separately ordered, must be 5/g”-1IUNCx 3-114” long for 4 inch (100 mm) valves and 3I4”-lOUZ?Cx 3-314” long for 6 inch (150 mm) valves.

When ordering the 4 or 6 inch (100 or 150 mm) Double Interlock Preaction System, the following items selected from Table A should be ordered:

9 Deluge Valve

l Swing Check Valve

l Electric/Electric Double Interlock Preaction Trim

l Electric Actuation Trim

l Automatic Pressure Maintenance Device

Replacement Preaction Trim Parts (Fig. C): Specify: (description) for use with Electric/Electric Double Interlock Pre- action System, PSN (specify).

1 - 250 lb. Air Pressure Gauge

2 - l/4’ Gauge Test Valve .

3 - i/4” Relief Valve 4 - l/2’ Globe Valve 5 - l/2” Swing

Check Valve 6-Z”AngleValve..... 16 - Pressure Alarm

Switch .

PSN 92-343-l-012

PSN 46-005-i-002 : PSN 92-343-l -020

PSN 46-047-l-004

PSN 46-049-I -004 : PSN 46-048-l-009

PSN 54-281-I-002

@Reg. trademark of GRINNELL CORPORATION, 3 TYCO PARK, EXETER, NH 03833 A tqC0 INTERNATIONAL LTD. COMPANY

OBSOLETE

preaction system, double interlock

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