Hubbell Fire Pump Controller LX-1500 Manuel utilisateur

April, 2000

Hubbell Industrial Controls, Inc.

A subsidiary of Hubbell Incorporated

50 Edwards St.

Madison, OH 44057

Telephone (440) 428-1161

FAX (440) 428-7635

Instruction Manual

Fire Pump Controller

Model LX-1500

Limited Service

Electric

Publication No. 197

HUBBELL

Limited Service Fire Pump Controller

Page 2of 12

Table of Contents

I Introduction..................................................................................................................................3

II Specifications and Certifications................................................................................................3

Specifications ................................................................................................................................3

Certifications.................................................................................................................................4

III Receiving, Handling, and Storage.............................................................................................4

IV Installation.................................................................................................................................4

V Sequence of Operation................................................................................................................5

VI Start Up Procedure....................................................................................................................7

VII Maintenance.............................................................................................................................9

Preventive Maintenance.................................................................................................................9

Troubleshooting.............................................................................................................................9

Coil and Contact Replacement.....................................................................................................10

VIII Limited Service Fire Pump Controller Parts.......................................................................11

Attachments

Typical Controller Schematic

Typical Field Connection Diagram

Notes

Refer to job drawings for options.

For combination Automatic Transfer Switch/Fire Pump Controller applications, refer to

Publication No. 186 for the LX-250 Transfer Switch or Publication No. 195 for the LX-350

Transfer Switch, for details.

Limited Service Fire Pump Controller

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IIntroduction

The Hubbell Limited Service Fire Pump Controller provides automatic and manual control of

small electric motor driven fire pumps and booster pumps of 30 horsepower or less.

All Controller components are inside the cabinet with indicating lights and switch handles

located next to the door. A pressure switch initiates automatic starting of the pump motor. The

Controller monitors the power phases and voltage. The CIRCUIT BREAKER

DISCONNECTING MEANS handle has a door interlock feature to prevent opening the door

when the switch is closed. The Controller also has an EMERGENCY MANUAL CONTROL

handle to start the fire pump manually.

Control

Panel

Incoming

Phase

Line

Surge

Suppressor

Fire Pump Motor

L1 M1 T1

PLM

Pressure

Switch

EMERGENCY

MANUAL

CONTROL

Control

Transformer

CIRCUIT

BREAKER

DISCONNECTING

MEANS

Figure I-1Block diagram of LX-1500 showing one phase

II Specifications and Certifications

Specifications

Voltage 208, 240, 380, 480C

Phase Loss/Reversal Module A-B-C phase rotation

200 Series

300 Series

400 Series

208–240 VAC, 60 Hz, 3 phase

380–415 VAC, 50 Hz, 3 phase

440–480 VAC, 60 Hz, 3 phase

Maximum Voltage 10% of highest nominal voltage

Maximum Frequency Shift 0.1 Hz

Phase Loss 18% of low voltage in one phase

Limited Service Fire Pump Controller

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Undervoltage Trip 15% below set point

Time Delays Pick-up, 1.5 s, fixed

Drop-out, 1.5 s, fixed

Output Relays 10 A, 120 VAC

5 A, 240 VAC

Indication green LED, on for A-B-C phase rotation

Surge Suppressor 650 V rating

Temperature Operating: −4°F to 104°F (−20°C to 40°C)

Storage: −4°F to 182°F (−20°C to 85°C)

Certifications

The Hubbell Limited Service Electric Fire Pump Controller is built to NFPA 20 requirements.

The Controller is listed by:

Underwriters Laboratory Factory Mutual

Underwriters Laboratory Canada New York City

Canadian Standards Association

III Receiving, Handling, and Storage

1. Immediately upon receipt, carefully unpack and inspect the Controller for damage that may

have occurred in shipment. If damage or rough handling is evident, file a damage claim with

the transportation carrier.

2. If the Controller must be stored, cover it and place in a clean, dry location. Avoid unheated

locations where condensation can result in damage to the insulation or corrosion of metal

parts.

IV Installation

1. Consult the motor nameplate to determine voltage, current, and horsepower rating and

compare with the Controller nameplate for matching data.

2. Release the door interlock by moving the CIRCUIT BREAKER DISCONNECTING

MEANS to the OFF position.

3. Inspect the control transformer’s primary connections for agreement with the line voltage of

the incoming power.

4. Exercise all switches and contactors, without power, to see that they operate freely.

5. Choose a location or base for the Controller that is non-combustible and within site of the

motor. The base should not be subject to excessive vibration that may cause erratic operation

of the PS (pressure switch). The Controller should be leveled so that the PS is level. Sight

across the PS cover screws.

Limited Service Fire Pump Controller

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Caution: Before drilling and punching holes in the cabinet for wiring

connections, cover the components inside the cabinet with a

protective covering. Debris may cause shorts or prevent operation

of components.

6. Punch holes in the top or the bottom of the cabinet for conduit.

7. Connect the water pressure sensing line to the PS (1/4 NPT internal, 3/4-16 external, brass)

fitting on the bottom of the cabinet. For further details, consult the latest edition of NFPA

20.

8. Connect the power supply conductors to the line side of the CIRCUIT BREAKER in the

correct A-B-C phase sequence.

9. Connect the motor conductors to the load side of the motor contactor.

Note

Refer to the Controller field connection diagrams. Per the requirements of NFPA 20, conductors

are sized for no less than 125% of the motor FLC (full load current) and not more than the lug

sizes provided, as shown on the Controller field connection diagrams. Refer to the NFPA 70

(NEC) for cable ratings. Secure conductors inside the cabinet so they do not interfere with or

come in contact with the components.

10. Connect the remote alarm contacts. Refer to the supplied Controller field connection

diagram for terminal points.

VSequence of Operation

The PLM (phase loss/reversal monitor) provides contact output for phase loss and undervoltage

(PLM-2) in addition to a separate contact output for phase rotation (PLM-1). Both output relays

energize if all three phases are present and the phases are in the proper rotation. If a phase loss

or undervoltage condition occurs, only the phase loss relay de-energizes. If the phases are

reversed relative to the sequence on the PLM, only the phase reversal relay de-energizes. If there

is a total loss of the three-phase voltage, both output relays de-energize.

Closing the CIRCUIT BREAKER DISCONNECTING MEANS energizes the PLM and the

control transformer. After a 3–5 second delay, contacts PLM-1 open and the PHASE

REVERSAL light should go off. If there is a phase reversal, PLM-1 remains closed to turn on

the PHASE REVERSAL light and energize the PRR (phase reversal relay) to provide remote

indication of phase reversal. The PLM-2 contacts also close, after the 3–5 second delay, to turn

on the POWER AVAILABLE light and energize the PFR (phase failure relay) to provide remote

indication that power is available.

Automatic Start - When the PS (pressure switch) contacts close due to a decrease in pressure,

the CR relay coil energizes. The CR contacts close to energize the TR1 timing relay, factory set

at 10 minutes, to begin timing. The TR1 contacts close to latch the CR relay and bypass the PS.

The CR contacts also energize contactor coil M1 to start the motor. If the pressure increases, the

PS contacts open to de-energize the CR relay and stop the motor, if TR1 has timed out. If TR1 is

Limited Service Fire Pump Controller

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still timing, the CR relay remains energized and the motor continues to run for the duration of the

timer setting.

Pressing the STOP push button stops the motor even if TR1 is timing. If the Controller does not

have a TR1 timing relay, the pump motor runs until the STOP push button is pressed.

Manual Local Start - Pressing the START push button energizes relay LRSR. The LRSR

contacts close to latch the LRSR relay and energize the M1 contactor coil to start the motor. The

motor runs until the STOP button is pressed to de-energize the LRSR coil.

Manual Stop – Connecting the jumper wire between TB2-4 and TB2-5 bypasses the TR1

timing relay contacts. When this jumper is installed, the motor runs until the STOP button is

pressed.

Remote Start - The remote start circuit requires the closure of remote contacts to start the

motor. Closing the remote contacts energizes the LRSR relay. The LRSR contacts close and

latch the LRSR relay until the STOP button is pressed.

Deluge Valve Start – A normally closed remote switch energizes the optional deluge valve

relay (DVR). Opening the remote switch de-energizes the DVR, closing the DVR contacts in

parallel with the PS contacts, to energize the CR relay and the TR1 timing relay. When the

remote switch closes, the DVR contacts open to de-energize the CR relay and stop the motor, if

TR1 has timed out.

Lockout – (This feature is not allowed per NFPA 20 and is permitted only when acceptable to

the authority having jurisdiction.) The lockout circuit requires the closure of remote contacts to

stop the motor. Closure of the contacts energizes the LK relay. Contacts LK open to de-

energize the CR relay and stop the motor. If the remote contacts open while the pressure is low,

the motor restarts.

EMERGENCY MANUAL CONTROL - The emergency start handle should only be used if the

Controller fails to start automatically or with the START push button. The motor runs until the

handle is returned to the OFF position or the CIRCUIT BREAKER is opened. To start the

motor when control power is not available, push the T-handle in and rotate counterclockwise

(45°°) to lock in the full ON position in a fast and continuous motion.

Caution: Failure to engage the handle in a fast and continuous motion can

result in damage to the contactor and failure to start the motor.

Pump Run Contacts - The pump run contacts transfer any time the M1 contactor is closed by

either electrical or mechanical means.

Phase Loss Contacts - The phase loss contacts transfer when line or control power is lost or

the line voltage drops more than 15 percent.

Phase Reversal Contacts - The phase reversal contacts transfer when there is a phase

reversal, rotation other than A-B-C.

Limited Service Fire Pump Controller

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VI Start Up Procedure

Danger: Shocks, burns, or death may result from high voltage.

Caution: Only personnel who are familiar with the power distribution system

and this manual should be allowed to perform this procedure.

1. Verify that the motor nameplate horsepower and voltage match the Controller nameplate.

2. Verify that the CIRCUIT BREAKER DISCONNECTING MEANS is open. Check with

the electrician to see if the Controller is connected directly to the main transformer. If so,

apply the Service Disconnect label above the CIRCUIT BREAKER handle operator.

3. Verify that the PLM is set to the line voltage.

4. Verify that the customer connections to the CIRCUIT BREAKER and contactor are properly

tightened.

5. Carefully remove the foam packing from the PS (pressure switch) between the mercury

switch and the bourdon tube. Remove the installation instructions above the tube. Replace

plastic cover.

6. Adjust the PS set points on the right side of the switch to meet water system requirements.

Set the upper pointer to the required STOP (HIGH) pressure setting. Set the lower pointer to

the required START (LOW) pressure setting.

The scale on the PS is only for initial positioning of the pointers. During testing of the

Controller, verify the PS settings by referring to the system pressure gage. Readjust settings

as necessary to obtain desired STOP and START settings. Refer to the instructions packed in

the PS and NFPA 20 for more information on adjusting the settings.

7. Verify that the minimum run timer TR1 is set for 10 minutes, per NFPA 20. The timer can

be field set as required by local jurisdiction.

8. Close the cabinet door and close the CIRCUIT BREAKER DISCONNECTING MEANS.

After a five second delay, verify that the POWER AVAILABLE light is on. If equipped with

a Transfer Switch, verify that the green LED on the PRM (phase reversal monitor) is on after

a five-second delay. If the LED’s are not on, open the CIRCUIT BREAKER and change

any two leads (L1, L2, and L3) on the PLM. If equipped with a Transfer Switch, change the

same two leads on the PRM.

Caution: Note that the pump should be primed and the water source available

before running to avoid damage to the pump. To avoid flooding,

ensure the sprinkler system is completely installed and ready to be

pressurized.

9. Bump the motor by pressing the START button and then press the STOP button, to check

for proper rotation. If not correct, open the CIRCUIT BREAKER and change any two leads

on the load side of the M1 contactor.

10. Press the START push button. Verify that the motor starts properly and runs at full speed.

Limited Service Fire Pump Controller

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11. Press the STOP push button to stop the motor.

12. Start and stop the motor with the EMERGENCY MANUAL CONTROL handle. Push and

rotate the T-handle in a quick motion to lock the contactor in the ON position to start.

Rotate the T-handle clockwise and release to stop the motor.

Caution: Failure to engage the handle in a fast and continuous motion can

result in damage to the contactor and failure to start the motor.

If equipped with an LX-250 or LX-350 Automatic Transfer Switch, complete the following

additional tests:

1. Verify connection of the engine generator set start wires to TB-1 and TB-2 at the top of the

LX-250 Transfer Switch power panel or to TB8-1 and TB8–2 on the left side of the LX-350

Transfer Switch power panel.

2. Close the FIRE PUMP (emergency) ISOLATING SWITCH and open the CIRCUIT

BREAKER. The Automatic Transfer Switch should transfer to the alternate source per

system requirements. Bump the motor to check for proper rotation. If incorrect, move the

FIRE PUMP ISOLATING SWITCH to the OFF position and switch the generator set off using

the switch located on the generator. Switch any two leads on the line side of the FIRE PUMP

ISOLATING SWITCH. Return the generator set control switch to the Auto position and close

the FIRE PUMP ISOLATING SWITCH. The generator set may start.

3. Operate the pump on the alternate (emergency) source using the START and STOP push

buttons.

4. Close the CIRCUIT BREAKER. The Control Module should now be sensing normal power

and timing for retransfer. Press the BYPASS RETRANSFER TO NORMAL push button to

return the Transfer Switch to the normal position.

Limited Service Fire Pump Controller

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VII Maintenance

Danger: Do not open the Controller cabinet until ALL power is disconnected.

Shocks, burns, or death may result from high voltage.

Caution: Only personnel who are familiar with the power distribution system

and this manual should be allowed to inspect or perform maintenance

on the Controller.

Preventive Maintenance

A. Protect the equipment against accumulation of dust and metal chips.

B. Protect the equipment against conditions that result in excessive moisture.

C. Exercise the equipment every week as part of routine maintenance to verify the integrity of

the Controller, Transfer Switch, generator set, power conductors, pump, and motor.

D. Field lubrication is not necessary or required for the Controller.

Troubleshooting

Hazardous voltage

will shock, burn,

or cause death.

Do not touch

until ALL power

is disconnected.

DANGER

Warning: Disconnect ALL power supply sources to the Controller before

servicing to prevent shock or accident hazard.

Before attempting any troubleshooting on the Controller, verify that the cause of a problem is not

due to the motor, pump, or power source. Then visually inspect the Controller for component

damage and lose wiring. If the problem cannot readily be resolved, review the Sequence of

Operation section for proper operation. Then refer to the supplied wiring diagram and schematic

and use a volt/ohm meter to check the wiring to determine which component is faulty.

Limited Service Fire Pump Controller

Page 10 of 12

Coil and Contact Replacement

Coil

Retainers

Coil

Spring

Clip

Magnet

Assembly

Figure VI-1 Magnet Assembly and Retainers

Coil Replacement* Contact Replacement*

1. Isolate all power sources. Complete steps 1 through 5 in left column.

2. While pressing against the coil, pull up slightly

on the coil retainers and swing away from coils. Remove the magnet assembly from the molded

cover and movable arm.

3. Pull the magnet assembly, coil, molded cover,

and movable arm from the contactor. Remove the return spring from the center of

movable arm.

4. Remove the spring clip and remove the

armature from movable arm. Remove the molded cover from movable arm.

5. Remove the coil from the magnet. Press and slide the movable contact and spring

from movable arm.

6. Replace the coil and reassemble. Remove the screws holding stationary contacts

in place and remove stationary contacts.

7. Replace contacts and reassemble.

Notes for re-assembly*:

a. The molded cover only fits one way.

b. The magnet and movable arm fit either way but operates more quietly if reassembled the

same way before removal.

c. Do not attempt to remove or replace arc traps in cover.

*Source: General Electric, GEH-5168

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