Associated documentation

- High pressure plunger pump operating instructions - Stand-by pump operating and maintenance

instructions

- Data sheets for specific units as applicable

- Hydraulic diagrams and parts lists for specific unit - Electric diagrams and parts lists for specific unit - Dimensional drawing for specific unit

2 Document number P31000FM C - CAUTION

The HI-FOG^® SPU produces high-pressure water when operating. To avoid injury to personnel and/or damage to equipment always follow the safety proce-dures described in this manual and required by local and/or national authorities.

- Water used with the HI-FOG^® system must be the equivalent of a potable supply. In all cases the input water must be fed through a < 100 μm filter and the chloride concentration MUST not exceed 50 ppm (= 50 mg/l). Under no

circumstances add suppression additives to the stored water supply.

- Only personnel who are appropriately trained are permitted to work on, test and service the SPU, the sprinkler system and its associated equipment. In case of doubt, contact the nearest Marioff representative!

- Check, test and service the SPU in accordance with the testing and servicing instructions in this guide.

FAILURE TO CHECK, TEST AND SERVICE THE SPU IN ACCORDANCE WITH THE INSTRUCTIONS GIVEN IN THIS GUIDE CAN JEOPARDIZE THE RELIABLE OPERATION OF THE SYSTEM

- Only use spare parts that are manufactured, supplied, or recommended by MARIOFF.

- If the SPU is switched off for maintenance or some other reason, take adequate fire precautions, according to your safety procedures, to cover the period that the SPU is out of operation.

- NOTE! If the system includes an external alarm signalling system, it will be released if the SPU main switch is turned off, when the system is activated.

Before carrying out any service, testing, or maintenance work, make sure that the external system is deactivated to avoid unintentional alarm. Remember to activate the system after service, testing, or maintenance work.

Document number P31000FM C 3 3.1 Unit Description

The HI-FOG^® Sprinkler Pump Unit (SPU) is designed to supply high-pressure water to a HI-FOG^® water mist dis-tribution system used for fire protection. It is used with single-fluid, single-pipe type HI-FOG^® sprinkler systems that use water, in the form of a fine mist, as the fire sup-pressant.

The SPU consists of the following main parts:

- one or more pump modules (the number will depend on the SPU installed, refer to the system specifica-tions).

Each pump module consisting of one 3-phase electric motor, two plunger pumps, and two unloaders.

- an electric control and monitoring system - a break-water tank

NOTE: Units may also be supplied without a break-water tank

- a filter in the inlet from the water feeding system - a pneumatic stand-by pump

Power is supplied to the SPU either from the Main Switch Board (MSB) or the Emergency Switch Board (ESB). The switching between the MSB and the ESB is done auto-matically.

A feed pump or hydrophore supplies fresh water to the SPU. In addition to the fresh water inlet the SPU may be connected to a fire main or another water source for redundancy.

4 Document number P31000FM C air inlet

electric connectors through cabinet bottom

fresh water inlet

filter

high pressure outlet

overflow line outlet

Arrangements vary per model - refer to labels.

Document number P31000FM C 5 The illustration shows the SPU 3, configurations may vary by model.

Motor status display

Cabinet disconnect

Manual start Manual stop

Emergency override

MCC main disconnect MOTOR 1

MOTOR 2

MOTOR 3

300 A MAIN DISC.

SWITCH

6 Document number P31000FM C In normal use the system MUST always be in the standby mode

Operating mode = the system is activated Off = system shut down for maintenance/repair

A pressure of 25 bar (or other system specific set value) is maintained in the system when it is in the standby mode.

A fire will cause the heat-sensitive bulbs on one of more sprinklers to break.

Alternatively, section valves are opened and water will start to flow from the released spray heads.

The flow monitor will detect the flow and start the SPU. A pressure switch will start the SPU if the flow monitor mal-functions.

The SPU can also be started manually, either locally by pushing the start button(s) on the control cabinet, or remotely by sending a start signal to the control cabinet.

When the SPU is activated, the pump modules are auto-matically started in sequence, with a few seconds delay between each start, in order to reduce electric peak loads. If the flow of water required is less than the output of the unit, the unloader valves open and route extra water back to the break tank (if supplied).

High-pressure water will now be fed to the HI-FOG^® sys-tem forming the HI-FOG^® mist.

After the SPU has been stopped it must be reset. The stabilization phase takes a few minutes, during which the system pressure drops to the stand-by level and then the unit returns to the stand-by mode.

Document number P31000FM C 7 4.1 System in stand-by mode

In normal use the system MUST be in the stand-by mode. The system is in the stand-by mode when:

- the SPU is connected to the electric supply and the main power switch is on

- working air is supplied to the stand-by pump and the pump is operational

- the system pressure is within the set limits, typically 25 bar

- the control system is operational (no alarms)

- the piping is sound and tight (see Installation Manual) 4.2 Start

4.2.1 Automatic start

The SPU will automatically start to operate if it detects a water flow and/or if the water pressure drops below 17 bar for more than 10 - 20 seconds (depending on the system size).

The lead motor will automatically start followed by the other motors in sequence. Be certain there is no longer a fire condition before closing the valves.

4.2.2 Manual start – remote

Push the emergency start button on the remote control panel (if provided) to start the SPU. This type of activa-tion varies by system. Note that the pump can be stopped only in the main panel.

8 Document number P31000FM C start the corresponding pump motor. Emergency local start is done by pushing in and turning to lock the emer-gency override handle. To deactivate the local start, either push the corresponding stop button(s) or unlock the override handle. See section 3.1.2.

Starting the pump with these buttons will override all other protection. Before carrying out a local manual start, check that no fault alarms are on.