Fire alarm and extinguishing controller

Refer to Instruction Manual for fire alarm and extinguishing controller

Solenoid overflow valve

Overview

Because the water flow is different among protected zones (quantity of nozzles is different), and the flow of pump is chose according to the maximum zone, a solenoid overflow valve will be needed to ensure that the pump can be start without shake.

Its structure and outline dimensions are the same as that of selector valve.

Key technical parameters

Model	Nominal working pressure MPa	Inside nominal diameter mm	H	L	Connection thread G	Solenoid valve
Working voltage	Operation factor	Power W
A5023/1001/012	4.0	F12			1/2	DC24V (-10%~+5%)	100% ED	18.5

Instruction

The solenoid overflow valve is fixed on side of safety valve with a joint on its outlet. The joint should be designed according to project, do not alter it at will.

It is normal close, should open and close in step with the selector valve in the same zone.

 

By pass valve

Overview

By pass valve is an important part in water mist fire extinguishing system, it insure the pump runs noload when start and stop.

Its structure and outline dimensions are the same as that of selector valve.

Key technical parameters

Model	Nominal working pressure MPa	Inside nominal diameter mm	H	L	Connection thread G	Solenoid valve
Working voltage	Operation factor	Power W
A5025/1001/012	4.0	F25				DC24V (-10%~+5%)	100% ED	18.5

Instruction

The solenoid overflow valve is fixed on one side of safety valve, and controlled by water pump control cabinet. When the water pump starts or stops, the by pass valve opens for 4~6s, then closes.

 

System operation flow

6.1 Operator should read this Instruction Manual as well as Instruction Manuals of plunger pump, water pump control cabinet and fire alarm and extinguishing controller. And be familiar with relative drawing or documents.

6.2 The integrative fire alarm system consists of this system and the fire alarm and extinguishing system. It has three control modes: automatic control, electric-manual control and manual emergency control.

6.3 Set the fire alarm and extinguishing controller in Ў°automaticЎ± control mode usually, and switch the Ў°manual/automaticЎ± selector switch on water pump cabinet to Ў°automatic Ў±position. Then the system is in auto state. Usually the system is in this state.

When there is a fire, fire detector will send fire signal to fire alarm and extinguishing controller, the later will give off audible and visible alarm signal as well as send extinguishing command to start corresponding selector and pump set to spray water mist. After extinguishing, press the reset button on fire alarm and extinguishing controller to stop spraying.

6.4 If the fire is observed, do as follows:

Press the manual alarm button or the corresponding start button on fire alarm and extinguishing controller to start system.

6.5 If the electric control cannot start system, operation procedure of emergency start is:

Open the corresponding selector valve manually, and switch the selector switch (on water pump control cabinet)Ў±manual/automaticЎ± to Ў°manualЎ± position, then press the start button on water pump control cabinet, the pump will be started and then start the system.

6.6 After extinguishing, reset the system in time. The operation flow is as follows:

a) If the system is started automatically or electric-manually, press the reset button on fire alarm and extinguishing controller to shutdown water pump and close selector valve, then press reset button of pressure switch.

b) For emergency start, press the stop button on water pump control cabinet, reset the selector valve and pressure switch manually.

INSTALLATIONS and debugging

Installation

7.1.1 General rules

7.1.1.1 The installation of the water mist fire extinguishing system should be comply with the design drawings and relative technical documents. It can be not altered without agrees of design company.

7.1.1.2 Make construction notes during the installation.

7.1.1.3 Installation place temperature: ЎЭ4ЎжЈЎЬ50Ўж.

7.1.1.4 The place should have special power supply (three phase three wire system): AC380V/50Hz or AC440V/60Hz.

7.1.1.5 The place should be easy for in and out, and not easy for fire occurring.

7.1.1.6 No explosive or electric dust, and corrosive substance in the air, or else it should have prevention measure.

7.1.2 Pump installation

7.1.2.1 Model and size should be comply with design requirements. And it should has CCS certificate, quality certificate and installation instruction.

7.1.2.2 Water tank and pump set inlet should be connected with flexible connecting pipe, make sure that the water inlet pressure is net positive.

7.1.2.3 No air cell and air leak on suction pipe of water pump.

7.1.2.4 Others refer to Instruction Manual for pump.

7.1.3 Fix the distributing pipe on the frame firmly.

7.1.4 Selector valve installation

7.1.4.1 Install the selector valve on side of operation surface with height no more than 1.7m and no less than 1.4m.

7.1.4.2 Stamp protected area name or serial number on selector valve.

7.1.5 Pipe installation

7.1.5.1 The material of pipes and the pipefitting are stainless steel.

7.1.5.2 Connecting type is threaded connection. Wind male screw with sealing tape.

7.1.5.3 Pipe cradle installation:

a) Fix the pipeline firmly. The maximum space between cradles is as table 7.1.5.3

b) Fix the end of the pipeline with cradle. The length of the pipeline between the cradle and nozzle should be no more than 250mm.

The maximum space between Table 7.1.5.3

Tube outside diameterЈЁmmЈ©	¦µ22	¦µ27	¦µ34	¦µ42	¦µ48	¦µ60
The maximum space betweenЈЁmЈ©	2.2	2.4	2.8	2.8	2.8	3.0

7.1.6 Tube tests

7.1.6.1 The pipe should undergo hydraulic test after installation.

7.1.6.2 Hydraulic test pressure is 5.25MPa, dwell time is 5min, the connection should have no leakage, and pipe should be no distortion.

7.1.6.3 Blow and sweep the pipe with compressed air or N₂ after finishing these tests. The velocity no less than 20m/s. Use calico to check if there are any rust, dust, stain and other dunghill.

7.1.7 Nozzle installation

7.1.7.1 Nozzle should be installed after test and air lancing.

7.1.7.2 Check the nozzleЎЇs model and size one by one.

7.1.7.3 Do not demount and alter nozzles when installation. Any ornamental coat is forbidden.

7.1.8 As to fire alarm and extinguish controller, refer to its installation instructions.

System debugging

7.2.1 General rules

7.2.1.1 Debug the system after installation.

7.2.1.2 The system should be debugged by professional with specific functions.

7.2.2Debugging

7.2.2.1 Debugging of fire alarm and extinguishing device refer to its Debugging Instruction.

7.2.2.2 Test the system at least in two protected areas.

7.2.2.2.1 The test control mode should be automatic control or electric-manual control.

7.2.2.2.2 Cover the nozzles or protected objects with transparent plastic material as well as collect sprayed water.

7.2.2.2.3 Spray test should be last for 0.5min.Test results should meet following requirements:

a) All the components of the system should work normally, every nozzle can spray water mist, and the press gauge shows right.

b) Audible and visible alarm signal is right.

c) The devices and the tubes should have no shake and mechanical damage.

7.2.2.2.4 After the tests, reset the system to normal state.

Maintenance

8.1 Set a control, check and maintenance system for the system, special person is needed to take charge the system and keep it in a good condition.

8.2 The maintenance personnel must acquaint with its construction principle, performance and maintenance instruction.

8.3 Regular inspection and test for fire alarm and extinguishing control device.

8.3.1 Check its functions every day.

8.3.2 Check and test the following functions quarterly:

1. Audible and visible alarm;

2. Play charge and discharge test 1~2 times. Automatic switch test between main power supply and emergency power supply 1~3 times;

3. Test the alarm and signal display function of pressure switch;

4. Check the controlled display functions of pump and selector valve.

8.3.3 More information refers to its Maintenance Manual.

8.4 Regular inspection and test for pump

8.4.1 To start it manually per month.

8.4.2 To start it electrically quarterly. The operation time be more than 1min. Open the water test valve when running and close it after stop running.

8.4.3 Pump maintenance refers to its Maintenance Manual.

8.5 Check the water level in water tank per month.

8.6 Check the nozzle per month, clear away foreign matter in time.

8.7 Do operating test each year.

8.7.1 The test control mode should be automatic control or electric-manual control.

8.7.2 Cover the nozzles or protected objects with transparent plastic material as well as collect sprayed water.

8.7.3 Spray test should be last for 0.5min.Test results should meet following requirements:

a) All the components of the system should work normally, every nozzle can spray water mist, and the press gauge shows right.

b) Audible and visible alarm signal is right.

c) The devices and the tubes should have no shake and mechanical damage.

8.8 Debug trouble in time to make sure that the whole system can operate normally.

8.9 After every operation (including extinguishing and test), reset the system according to item 6.6.

8.10 After every operation (include extinguishing and test), clean or change filter gauze.

8.11 Make detail record after every test and maintenance.

8.12 Do not touch any component at will to avoid accident.