DIESEL ENGINE FIRE PUMP CONTROLLER. WISDOM : WD‐9000

DIESEL ENGINE FIRE PUMP CONTROLLER
WISDOM : WD‐9000
Description
Custom combined automatic and manual relay logic diesel engine fire pump controllers
are intended for starting and monitoring fire pump diesel engines. They are available for
use with 12 Volt systems using lead acid or Nickel‐Cadmium batteries.
ENCLOSURE – The enclosures are NEMA Type2, drip‐proof, for installation in areas protected
from direct sunlight with an ambient temperature range of 41°F (5°C) to 104°F (40°C)
External mounting ears are provided for easy installation on any vertical surface. A drip
shield protects the interior of the enclosure from water accumulation. All metal parts are
plated, or primed and painted, to give maximum corrosion protection. The standard enclosure color is red.
Floor and base mounting legs are available for those applications where floor or base mounting of the controller is preferred. Refer to Options for ordering information.
In addition to the standard enclosure, the following special purpose enclosures are available.
NEMA Type 3R ‐‐ Raintight, weatherproof
NEMA Type 4 ‐‐ Waterproof (painted steel)
NEMA Type 4X ‐‐ Waterproof, corrosion resistant (304 stainless steel)
NEMA Type 12 – Industrial use, dustproof, Oilproof
Refer to Modifications or ordering information
CONSTRUCTION – WD 9000 controllers are supplied as standard with dual 10 amp, current limiting battery chargers, The controllers include a minimum running period timer set for 30 minutes. The controller may be easily field converted for either automatic or manual shutdown. As standard, a 0‐300 psi (0‐21 kg/cm2) pressure switch is provided. Pressure switches for other ranges and for foam/sea water applications are available. Refer to Modifications for ordering information.
A voltage surge arrester is included as standard to provide secondary surge protection for the incoming AC line.
All components are front m ounted and wired for ease in connecting and checking. Conveniently located terminal blocks allow quick field connections for a REMOTE START pushbutton, deluge system starting, ENGINE RUNNING signal, ENGINE TROUBLE signal, SWITCH MIS‐SET signal, remote interlock as well as terminal connections to the engine. All circuits within the controller which might carry charging currents from the engine alternator are sized for 55 amperes.
CONTROLS – Two ammeters, two voltmeters, weekly test timer, audible alarm, pushbuttons and pilot lights are located on the enclosure flange or behind the break‐away window for easy viewing and operation. Two BATTERY CRANK pushbuttons allow manual cranking from each battery, or both batteries, at times when the engine has become too cold to start with one battery.
Inside the controller, a simple three position switch allows selection of MANUAL mode, controller OFF or AUTOMATIC mode.
WD 9000 controllers feature a digital, panel mounted weekly test timer. The timer is visible through the break‐away window and can display either current time or weekly test time. The weekly test timer is arranged with a
manual bypass switch to simulate a weekly test start. Three push‐pull type circuit weekly test start. Three pus h‐pull ty pe circuit break ers give ready indication of the AC power condition and the two battery circuits and can easily be operated to simulate AC power failure or battery failure.
SAFETY SHUTDOWN – Firetron’s exclusive
Safety Shutdown feature causes the engine to shut down if low oil pressure of high engine water temperature conditions occur during weekly test, manual test, or power failure start. However, should the system pressure
drop, deluge valve trip, or a remote START signal be received by the controller indicating a fire condition, the shutdown signal will cancel and the engine will start and run. This safety feature prevents destruction of the engine due to nonessential test operation.
OPERATION – The battery cranking circuit alternates the two separate storage batteries with timed crank and rest periods when called upon to automatically start the engine. Battery condition monitoring circuits will detect low battery voltage and cause the controller to alarm the condition and lock itself on the other battery. An optional AC Power Failure relay will cause automatic starting of the engine on power failure and return the controller to standby when power is restored (if the controller is configured for automatic shutdown).
The power failure relay time delay before start is adjustable up to three minutes.
ALARMS – The standard controller has built‐in audible and visible alarms for battery failure, engine overspeed, low oil pressure, high water temperatur e, engi ne failed to start an d battery charger of AC power failure. A POWER ON pilot light indicates the controller is in the standby start mode.