Trane UCM-CLD Manuale utente

UCM-CLD

Chiller Control System

Owner

Manual

RLC-SVU02F-E4

General information

RLC-SVU02F-E4

Foreword

These instructions are given as a

guide to the operation of the

controller(s) mounted onTrane

RTAD/RTWB/RTRA chillers.They do

not contain full service procedures

necessary for the continued

successful operation of this

equipment.The services of a qualified

technician should be employed

through the medium of a

maintenance contract with a

reputable service company. Read

this manual thoroughly before unit

start-up.

Warnings and cautions

Warnings and Cautions appear at

appropriate sections throughout this

manual.Your personal safety and the

proper operation of this machine

require that you follow them

carefully.The constructor assumes no

liability for installations or servicing

performed by unqualified personnel.

WARNING! : Indicates a potentially

hazardous situation which, if not

avoided, could result in death or

serious injury.

CAUTION! : Indicates a potentially

hazardous situation which, if not

avoided, may result in minor or

moderate injury. It may also be

used to alert against unsafe

practices or for equipment or

property-damage-only accidents.

Safety recommendations

To avoid death, injury, equipment or

property damage, the following

recommendations should be

observed during maintenance and

service visits:

1.The maximum allowable pressures

for system leak testing on low and

high pressure side are given in the

chapter "Installation". Always provide

a pressure regulator.

2. Disconnect the main power supply

before any servicing on the unit.

3. Service work on the refrigeration

system and the electrical system

should be carried out only by

qualified and experienced personnel.

Reception

On arrival, inspect the unit before

signing the delivery note.

Reception in France only:

In case of visible damage:The

consignee (or the site representative)

must specify any damage on the

delivery note, legibly sign and date

the delivery note, and the truck driver

must countersign it. The consignee

(or the site representative) must

notifyTrane Epinal Operations -

Claims team and send a copy of the

delivery note. The customer (or the

site representative) should send a

registered letter to the last carrier

within 3 days of delivery.

Note: for deliveries in France, even

concealed damage must be looked

for at delivery and immediately

treated as visible damage.

Reception in all countries except

France:

In case of concealed damage:The

consignee (or the site representative)

must send a registered letter to the

last carrier within 7 days of delivery,

claiming for the described damage.

A copy of this letter must be sent to

Trane Epinal Operations - Claims

team.

Warranty

Warranty is based on the general

terms and conditions of the

manufacturer.The warranty is void if

the equipment is repaired or

modified without the written

approval of the manufacturer, if the

operating limits are exceeded or if

the control system or the electrical

wiring is modified. Damage due to

misuse, lack of maintenance or

failure to comply with the

manufacturer's instructions or

recommendations is not covered by

the warranty obligation. If the user

does not conform to the rules of this

manual, it may entail cancellation of

warranty and liabilities by the

manufacturer.

Maintenance contract

It is strongly recommended that you

sign a maintenance contract with

your local Service Agency.This

contract provides regular

maintenance of your installation by a

specialist in our equipment. Regular

maintenance ensures that any

malfunction is detected and corrected

in good time and minimizes the

possibility that serious damage will

occur. Finally, regular maintenance

ensures the maximum operating life

of your equipment. We would remind

you that failure to respect these

installation and maintenance

instructions may result in immediate

cancellation of the warranty.

Training

To assist you in obtaining the best

use of it and maintaining it in perfect

operating condition over a long

period of time, the manufacturer has

at your disposal a refrigeration and

air conditioning service school.The

principal aim of this is to give

operators and technicians a better

knowledge of the equipment they are

using, or that is under their charge.

Emphasis is particularly given to the

importance of periodic checks on the

unit operating parameters as well as

on preventive maintenance, which

reduces the cost of owning the unit

by avoiding serious and costly

breakdown.

Contents

3RLC-SVU02F-E4

General Information 2

Principles of operation

of the UCM-CLD module 4

General Information 4

Operator’s Interface 5

Operational Features 9

Diagnostics 16

Default Description 17

Controller for hydraulic module/

free cooling / heat recovery / RTWB

heat pump applications 22

Hydraulic module control 23

Control logic 23

Module and outputs/inputs 24

Hydraulic module option 25

Data display menu 26

Configuration menu 27

Alarms messages - hydraulic module application 30

Mask and menu chart 31

Free cooling application 32

Heat recovery application 38

RTWB heat pump application 40

Principles of Operation of the

Module UCM-CLD

RLC-SVU02F-E44

General Information

This UCM-CLD chiller control is

composed of eight electronic

modules, which each have their

own 115V or 24V power supply and

communicate with each other via a

serial link.The names of the

modules are linked to their

functions.

Figure 1 : Operator’s interface

Compressor

Report

Refrigerant

Report

Chiller

Report

Custom

Report

Select Report Group

Diagnostics

Service

Tests

Service

Settings

Operator

Settings

Alarm

AutoEnterPrevious

StopCancelNext

Select Setting Group

ADAPTIVE CONTROL™

Module Functions

MCSP (Motor Compressor Start and Protection)

CPM (Chiller Protection and Management) Safety, protection, and control of the chiller

EXV (Electronic Expansion Valves) Control of both electronic expansion valves

CSR (Communication and Setpoint Reset) ,

Local CLD (Local Clear Language Display) Operator interface located in the front panel of the unit

Remote CLD (Remote Clear Language Display)

TCI IV, COM 3 (Tracer Communication Interface 4, COM 3)

Safety, protection, and control of the helical-rotary compressor and

its components

Control of the serial communication, unit external setpoints and

ice-making mode (optional module)

Operator interface located up to 1500m from the unit, able to

communicate with up to four units of the same type (optional module)

TCI IV, IPCB (Tracer Communication Interface 4, Inter Processor

Communication Buffer) Protection of the internal communication bus in the unit from external

interferences (optional factory-mounted module, compulsory when

using a Remote CLD)

Interface between the control of the unit and a Building Management

System usingTrane COMM 3 serial link

Principles of Operation of the

Module UCM-CLD

5RLC-SVU02F-E4

Operator's Interface

Digital Display

The display of control regulation and

operating parameters, diagnostics,

and error messages is a 2-line, 40-

character, liquid-crystal display.The

display has a LED backlight to read

in low-light conditions and to warm

up the display under low ambient

temperatures. When powering up

the system, the display is not lit and

the message [SELF-TEST IN

PROGRESS] is displayed.The screen

can display error codes, settings of

various setpoints, specified

temperature and pressure values,

and the status of operating

parameters and options.

Keyboard

A 16-key touchpad allows both

navigation between menus and the

modification of parameters and

setpoints. The keys are divided into

two groups:

Individual Menu Keys Control Keys

Chiller Report Menu + key

Custom Report Menu -key

Refrigerant Menu Previous key

Compressor Menu Next key

Operator Settings Menu Enter key

Service Settings Menu* Cancel key

ServiceTest Menu* Auto key

Diagnostics Menu Stop key

* Levels 2 and 3 of the Service Settings Menu and the ServiceTest Menu are protected by a

password and are reserved forTrane Service Engineers.

Figure 2 : Control panel mounted on a model RTWA unit

Principles of Operation of the

Module UCM-CLD

RLC-SVU02F-E46

Control Key Functions

[+] key If the information displayed

is read-only, pressing this key will

add it to the operator's menu. If the

information can be modified,

pressing this key will increase the

value without exceeding the

maximum possible value.

[-] key If the information displayed

is read-only, pressing this key will

remove it from the operator's menu.

If the information can be modified,

pressing this key will decrease the

value without exceeding the

minimum possible value.

[Previous] key Pressing this key

allows the operator to scroll up to

the previous information in the

current menu. Each menu is

looped, making it possible to scroll

from the first item in the menu to

the last item.

[Next] key Pressing this key allows

the operator to scroll down to the

next information in the current

menu. Each menu is looped, making

it possible to scroll from the last item

in the menu to the first item.

[Enter] key Pressing this key allows

the operator to validate a value after

modification.

[Cancel] keyThis key should be

pressed if a modified setting should

not be saved.

[Auto key] Pressing this key allows

the unit to be in Auto mode if it was

previously placed in Stop mode

with the [Stop] key. The unit cannot

be forced into Auto mode if an

external contact or the serial link

has stopped it. When the unit is

stopped by the remote interface

(Remote CLD), the local mode order

has priority.

[Stop] key Pressing this key allows

the unit to be in Stop mode. In

every case, and whatever the origin

(except a local stop), the stop order

and stop status have priority over a

run order. The stop generated is a

soft stop - the unit unloads before

stopping.

Whether a [Stop] or [Auto]

command will be accepted and

stored is based on the following

hierarchy:

1. Local Stop will always replace

Local Auto, Remote Auto, and

Remote Stop.

2. Local Auto will always replace

Local Stop, Remote Auto, and

Remote Stop.

3. Remote Stop will always replace

Local Auto and Remote Auto. It

will not replace Local Stop.

4. Remote Auto will always replace

Local Auto and Remote Stop. It

will not replace Local Stop.

Pressing the [Stop] key twice within

five seconds will result in an

Emergency Stop.The chiller will not

unload.

Principles of Operation of

the Module UCM-CLD

7RLC-SVU02F-E4

Parameters and setpoints within each menu

Menu Parameters/setpoints Range

Minimum/Maximum

Chiller Report Menu Active Chilled Water Setpoint

Evaporator Entering/ Leaving Chilled WaterTemperature

Condenser Entering / Leaving Chilled WaterTemperature

Active Ice-Storing Setpoint

Active Hot Water Setpoint

Entering/Leaving Hot WaterTemperature

Current Active Setpoint limits -17.8°/18.3°C

Evaporator/Condenser Waterflow

Ambient AirTemperature

Sources of setpoints (Tracer, local CLD, external)

Custom Report Menu Custom-built by the operator (Can contain up to 20 settings)

Refrigerant Report Menu Condenser/Evaporator Refrigerant Pressures

RefrigerantTemperature in Condenser

RefrigerantTemperature in Evaporator

Compressor Report Menu Compressor Status

Time and Start Counters

Amps (% RLA)

OilTemperature (GP compressor only)

Operator Settings Menu Setpoint Source

External Chilled Water Setpoint

External Hot Water Setpoint

Chilled Water Pump Operation

Chilled Water Pump Off Delay 1 min/30 min

Ice Machine Control*

Panel IceTermination Setpoint -6.6°/-0.5°C

Low Ambient Lockout

Low Ambient Lockout Setpoint -28.8°/15.5°C

Front Panel Current Limit Setpoint 40%/120%

Front Panel Hot Water Setpoint 25°/60°C

Front Panel Chilled Water Setpoint -17.8°/18.3°C

Design DeltaTemperature Setpoint 2.2°/16.6°C

External Current Limit Setpoint

Differential to Start Setpoint 1.1°/16.6°C

Chilled Water ResetType

Type Reset Ratio

Type Start Reset Setpoint

Type Max Reset Setpoint 0.0°/11.1°C

Principles of Operation of

the Module UCM-CLD

RLC-SVU02F-E48

Service Settings Menu** LEVEL ONE-Information adjusted by customer

Unit Line Voltage

Over/Undervoltage Protection

Restart InhibitTime 30/120 sec

Balanced Compressor Starts and Hours

Display Language and Units

Programmable Relay Set-up 1/12

External Circuit Lockout

LEVEL TWO- Information adjusted by Service Engineer

Address of Serial Link 0/64

Display Lock Feature

Leaving WaterTemperature Setpoint

Low RefrigerantTemperature Cutout Setpoint

Low WaterTemperature EXV Air Compressor

Condenser Limit Setpoint 60/120%

Phase Unbalance Protection

Phase Reversal Protection

Superheat Setpoint 2.2°/11.1°C

EXV Control Response Circuit 1 2/200

EXV Control Response Circuit 2 2/200

Leaving WaterTemperature Control Response Setpoint

Fan Control Deadband bias Circuit 1 -50/50

Fan Control Deadband bias Circuit 2 -50/50

LEVEL THREE-Configuration/Protection Information

Compressor Model Number Prefix

Number of Compressors

Oil Loss Differential Setpoint

Compressor ATon

Compressor BTon

Compressor CTon

Compressor DTon

Fan Control

Variable Speed Fan Circuit 1

Variable Speed Fan Circuit 2

Number of Fans Circuit 1

Number of Fans Circuit 2

Reduced Inrush Starting

Current Overload Compressor A

Current Overload Compressor B

Current Overload Compressor C

Current Overload Compressor D

Low Ambient Unit Half Air Flow Fan

Low Ambient UnitTwo-Speed Motor

Night Noise Setback

Number of EXV Circuit 1

Number of EXV Circuit 2

RefrigerantType

ServiceTests Menu Perform Expansion Valve Test

Perform Circuit locking or Pump-outTest

Perform CompressorTest

Diagnostics Menu Current Diagnostics

History of Diagnostics

Manual Reset of Diagnostics

Erase History of Diagnostics

* Option

**This menu has three access levels.The control has a display lock feature that can be locked at request after level one.

Principles of Operation of

the Module UCM-CLD

9RLC-SVU02F-E4

Operational features

Entering evaporator water

temperature

When one or both compressors are

running, the UCM continually

monitors and compares the

entering and leaving evaporator-

water temperatures. If the

temperature of the entering water

drops more than 1°C below the

leaving water temperature for more

than

55°C- seconds, the UCM uses this to

indicate a loss of water flow

through the evaporator. This will

shut down that circuit's compressor

and will display MMR diagnostic.

Current Limit Setpoint (CLS)

The current limit setpoints for the

system are entered through the

Clear Language Display menus.The

current limit Setpoint for each

compressor is shown inTable 1.

Table 1 – Compressor current limit

Setpoint versus Chiller current

limit Setpoint

System

CLS One Two

120% 120 120

100% 120 100

80% 120 80

60% 120 60

40% 80 40

Based upon current levels received

at the UCM, the compressor slide

valve is modulated to prevent the

actual chiller current from

exceeding the CLS.

When a compressor is turned off,

the CLS for the remaining running

compressor shall be reset upward

immediately. When a compressor is

added, the CLS for the running

compressor shall be ramped

downward at a rate not less than

10% RLA per minute to the new

Setpoint.

Numbers of compressor in

operation

Electronic expansion valve

(EXV) test

This test can be performed only when

the “Stop“ key has been pressed. It

will confirm proper operation of the

electronic expansion valve and the

EXV module.

After the test has been initiated at

the Clear Language Display, the

UCM will:

1. Overdrive the EXV closed

(25 seconds)

2. Overdrive the EXV open

(25 seconds)

3. Overdrive the EXV closed

(25 seconds)

4. Reset the display to disable and

end the test

The EXV produces an audible

clicking sound when it is driven

against its end stops. Step 1 drives

the EXV to its closed position,

during which time service personnel

can move from the CLD to the EXV.

Note: A tool may be needed to aid

in hearing the clicking of the EXV,

such as a screwdriver held between

the EXV and the ear.

Current overload protection

The UCM continually monitors

compressor current to provide unit

protection in the event of an

overcurrent or locked-rotor

condition. Protection is based on

the phase with the highest current

and, if limits are exceeded, the UCM

will shut down the compressor and

will display an MMR diagnostic.

Leaving chilled-water temperature

control

If the Auto key is pressed and a

remote chilled-water Setpoint has

been communicated, the UCM will

control to that Setpoint. Otherwise,

it will control to the front-panel

Setpoint. Control is accomplished

both by staging compressors and

by modulating the slide valves on

each compressor.

Upon start-up, if the leaving chilled-

water temperature is dropping 0.8°C

per minute or faster, the chiller will

not load further.

Principles of Operation of

the Module UCM-CLD

RLC-SVU02F-E410

Chilled-Water Reset (CWR)

As an option, the UCM will reset the

chilled-water temperature setpoint,

based on either the return water

temperature or the outdoor air

temperature.The CSR module is

necessary to perform CWR.

The following are selectable:

One of four reset types, from top to

bottom in order of reset:

no CWR

RETURN WATERTEMPERATURE

RESET

ZONETEMPERATURE RESET

OUTDOOR AIRTEMPERATURE

RESET

Leaving-water temperature cutout

This temperature cutout provides

protection against freezing caused

by low leaving-water temperature.

The setpoint is both factory-set and

adjustable from the Service Setting

Menu.Temperatures below the

setpoint will cause the UCM to

accelerate reduction of chiller

capacity, even to the point of

compressor shutdown. A non-

latching diagnostic will be

generated if the LWT is below the

cutout for more than 16°C-seconds.

There must be a minimum of 2.7°C

between the cutout temperature

and both the front-panel and active-

chilled-water setpoints.The Clear

Language Display will not permit

setting of either the front-panel or

active-chilled-water temperatures

less than 2.7°C above the cutout

temperature.The second line will

state:

Limited by Cutout Setpoint (+)

to change

If the leaving-water temperature

cutout is set upward, the Clear

Language Display will maintain the

2.7°C minimum and will

automatically raise the settings on

the front-panel and active-chilled-

water setpoints, if necessary.

If the front-panel or active-chilled-

water setpoints were adjusted, the

display will show the following

when the “enter“ key is pressed:

FRONT PANEL CHILLED WATER

SETPOINT HAS BEEN

INCREMENTED DUETO CUTOUT

SETPOINT CHANGE

If the leaving-water temperature

drops below the cutout setpoint

while the compressors are de-

energized, it will produce an IFW

diagnostic. If the leaving-water

temperature drops below the cutout

setpoint while the compressors are

energized for 16°C-seconds, the unit

will shut down on an MAR

diagnostic.

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