SPX MARLEY LLC+ui Bedienungsanleitung

LLC+ui integrated ultrasonic water level control

INSTALLATION - OPERATION - MAINTENANCE

Z1080552 ISSUED 11/2018 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT.

user manual

contents

System Diagram..........................................................................................................4

Description ...................................................................................................................4

Programming................................................................................................................5

Operation......................................................................................................................8

Water Makeup Function ............................................................................................8

HAND-OFF-AUTO Switch........................................................................................8

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

Field Wiring - Parts List ..........................................................................................10

This manual contains vital information for the proper installation

and operation of the LLC+ui controls. Carefully read the manual

before installation or operation and follow all instructions. Save

this manual for future reference.

Note

Indicates presence of a hazard which can cause severe personal

injury, death or substantial property damage if ignored.

Indicates special instructions on installation, operation or mainte-

nance which are important but not related to personal injury hazards.

Warning

Note

The following defined terms are used throughout this manual to

bring attention to the presence of hazards of various risk levels, or

to important information concerning the life of the product.

introduction

These instructions are intended to assure that field connections are completed

properly and the control system operates for the maximum time possible. Since

product warranty may depend on your actions, please read these instructions

thoroughly prior to operation.

If you have questions about the operation and/or maintenance of this control

system and you do not find the answers in this manual, please contact your

Marley sales representative.

Hazard of electrical shock or burn. Be sure to turn off power to the

panel before servicing. If working on equipment out of site of panel

disconnect, lockout using standard lockout procedure.

Safety First

The Marley control system uses UL listed components installed in accordance

with the National Electric Code. The location of the cooling tower and field

installation of the control system can affect the safety of those responsible

for installing, operating or maintaining the tower and controls. However,

since SPX Cooling Technologies does not control the tower location, or field

installation, we cannot be responsible for addressing safety issues that are

affected by these items.

The following safety issues should be addressed by those responsible

for installation, maintenance or repair of the tower and controls:

• Access to and from the control panel (including the customer supplied

main disconnect/branch circuit protection.)

• Proper grounding of electrical control circuits.

• Sizing and protection of branch circuits feeding the control panel.

• Qualification of persons who will install, maintain and service the electri-

cal equipment.

These are only some of the safety issues that may arise in the design and

installation process. Marley strongly recommends that you consult a safety

engineer to be sure that all safety considerations have been addressed.

Other safety issues are addressed in literature supplied with your tower. You

should closely review the literature prior to installing, maintaining or repairing

your tower.

Warning

description

The Liquid Level Control systems are used to accomplish

five different functions:

• Water Makeup • High Water Alarm

• Low Water Alarm • High Water Cutoff

• Low Water Cutoff

The most common application of a water level control

system is water makeup. The system regulates the amount

of water in the tower basin and keeps it within normal

operating levels. This makeup system is used to control

a remotely installed water solenoid valve. When the water

level drops below a prescribed, preset level, the solenoid

valve is energized by the control system to fill the basin

to its proper level.

LLC+ui

Controller

with Display

Sensor

30'-0 Lead 4-20mA level signal

High and low cut-off dry contacts

High and low alarm dry contacts

MU powered with 120V

Ethernet

Solenoid

Pump

BMS

Stilling

Chamber

Basin Floor

6amp 120/1/60

Utility Supply

Junction

Box

Extension

if required

Marley Control Panel

(e.g. AIO, SPPC)

Display

SYSTEM DIAGRAM

LLC+ui Components Optional Field Components—by others

High and low water alarms can be utilized to give warn-

ings associated with abnormal operating water levels. To

provide indication of these types of alerts, the control sys-

tem provides dry contacts to interface with various digital

control systems or can be connected to user supplied alarm

indicators to signal when corrective action is required.

Low-water cutoffs are commonly used to protect pumps

from operating without sufficient water. When used in

unattended operating environments, the low-water cutoff

is configured to shut the pump off, thus preventing costly

repairs. Dry contacts can be wired directly in series with

pilot duty controls or to digital control systems to initiate

the shutdown of protected equipment during low-water

situations.

programming

SCREEN LAYOUT

Red indicates the relay inside the control panel has been energized.

LEVEL IN INCHES–actual water level in the cold water basin

GOTO SETUP–use to program sensor heights and setpoint levels.

Default password is 1492

INFO–use to see programmed levels

Requires field programming

1. Measure and program the distance between sensor and water basin floor

2 Program the water level setpoints

3. Operate WATER MAKE UP selector switch to operate

solenoid valve circuit

The WATER MAKE UP selector switch controls the makeup

solenoid circuit

HAND position–manually energizes remote makeup solenoid

OFF position–no power to remote makeup solenoid

AUTO position–ultrasonic makeup water level sensor activated

Note

➠

programming

PROGRAMMING STEPS

Power ON the control panel circuits by

moving the switches on the two circuit

breakers to the up position.

Measure the distance from the bottom of

the ultrasonic sensor to the basin floor.

Access the program by pressing

GOTO SETUP

Press the light blue screen cell under

ENTER PASSWORD bringing up a

yellow keypad then enter password 1492

(factory default password) and press ENT

to access the setup screens.

BOTTOM OF SENSOR

TO BASIN FLOOR

programming

Press the light blue screen cell to right of

SENSOR HEIGHT to bring up a yellow

keypad then enter the sensor height in

inches. Sensor height is from bottom of

the sensor to basin floor (or bottom of

PVC tubing in case of an external stilling

chamber.

Press the NEXT button to enter additional

programming screens.

On each screen, enter the water level

setpoint values by pressing the light blue

cell and entering a value on the yellow

keypad then press ENT to save.

Recommended levels are unique for every

cooling tower and are available from your

Marley sales representative.

When finished press GO TO MAIN to

return to main screen.

On the main screen are view actual water level and relay actions. The reac-

tion time is purposely slow to allow time for the system to react and refresh

the screens.

operation

Operation

The LLC+ui water level control system consists of an ultrasonic sensor placed

to measure the water level in the cold water basin. The senor is typically located

inside the cooling tower or on some cooling towers in an external chamber. A

PLC with HMI touch screen is used to program water level heights and offers

a visual indication of the water level. Internal relays with form "C" contacts are

used as switches, one for each water setpoint.

Programming is accomplished in the field based on recommended cooling

tower water level heights. Contact your Marley sales representative for recom-

mended setpoint levels. The sensor is programmed with a height from sensor

to bottom of the basin floor. Individual setpoint levels are programmed for high

cutoff, high alarm, makeup, low alarm and low cut off.

Alarm set point may be used to complete a remote BMS alarm circuit. Cut off

set point may be used to shut of a circulating pump.

A 4-20mA output is provided for BMS remote monitoring of water level

Water Makeup Function

The circuitry for water makeup in the LLC+ui control panel provides an inde-

pendent circuit breaker for direct connection to a 110-120VAC water solenoid

valve. This added feature allows customer installation without having to provide

an additional power circuit to energize the solenoid. The solenoid is connected

to terminals 2A and 4A as represented on the control’s specific wiring diagram.

Purpose and Function of the HAND-OFF-AUTO Switch

Located on the right side of the control’s enclosure is a HAND-

OFF-AUTO switch. This switch is used primarily at cooling

tower startup and in maintenance procedures where the tower

basin is empty or has been drained. When the tower’s basin

needs to be manually filled, the switch is placed in the HAND

position. This selection bypasses the probe assembly’s feed-

back and directly energizes the solenoid valve connected to

the water supply. Once the cooling tower basin is filled, the switch is placed

in the AUTO position to allow the ultrasonic sensor to monitor and sustain

the proper operating level. Placing the switch in the OFF position completely

interrupts any monitoring or fill action normally provided by the LLC+ui control

panel. Normal tower operation depends upon the HAND-OFF-AUTO switch

being positioned in the AUTO mode at all times.

troubleshooting

The control panel has been factory tested before shipment and most issues

lie outside of the control panel e.g. proper field wiring connections to the

control panel.

In an effort to troubleshoot the system, please check the following:

• The unit requires programming in the field. See programming instruc-

tions in this manual. The ultrasonic sensor head does not require any

field programming.

• Check water make up selector switch position.

• Confirm the two sensor wires are oriented and correctly connected at

terminal points in the control panel assuring the terminal connection

does not land on the insulation of the sensor wire. Strip back just enough

wire insulation so you can see some copper wire exposed assuring a

metal-to-metal connection.

• The sensor wire is a four wire plus shielded cord. The red and black wires

connect to terminal points 24 and 13. The shield connects to ground.

Always refer to the as-built wiring diagram on the inside door panel for

current connection points. Tape back the white and green wires that are

not used.

• If sensor wires were extended in the field, check to make sure the exten-

sion wires were numbered correctly and connections secure.

• Assure no external power wiring from other devices run in parallel with

the sensor wiring. Follow best practice wiring for power and instrumen-

tation wiring placements.

Checking the power circuit for the makeup solenoid

• Rotate the water make up selector switch to the HAND position. The

solenoid should energize allowing makeup water to flow into the cool-

ing loop. Inside the control panel is a single-pole circuit breaker, which

must be in the ON position to power the circuit.

field wiring - parts list

Part Number Description

2588880 DL10 Ultrasonic sensor only with 30 ft cable (no junction box or fittings)

2586100 DL10 Ultrasonic sensor with 30 ft cable, junction box and 3" union slip fitting for round PVC stilling

chamber located external to the cooling tower

2599330 DL10 Ultrasonic sensor with 30 ft cable, junction box and 3" threaded fitting for square metal stilling

chamber located internal to the cooling tower

2586086 100 ft 4-18 AWG PVC cable

2586087 150 ft 4-18 AWG PVC cable

2586088 200 ft 4-18 AWG PVC cable

BASIN WATER MAKEUP SOLENOID HOT WIRE

BASIN WATER MAKEUP ON DRY CONTACT

BASIN WATER HIGH LEVEL ALARM DY CONTACT

BASIN WATER HIGH LEVEL CUTOFF DRY CONTACT

BASIN WATER LOW LEVEL ALARM DRY CONTACT

BASIN WATER LOW LEVEL CUTOFF DRY CONTACT

4-20 mA LEVEL SIGNAL FROM CONTROLLER

SHIELD

Wiring diagram is typical. Refer to wiring diagram on inside of the enclosure door for actual as-built wiring

diagram, which may include project specific options.

Wire Makeup Solenoid Here

All connection points located

on vertical user terminal strip

Wire Ultrasonic Sensor Here

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