Carrier Aquasnap 30rap011-060 User guide

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53300221-01 Printed in U.S.A. Form 30RAP-7T Rev. A Pg 1 5-21 Replaces: 30RAP-6T

Controls, Start-Up, Operation,

Service, and Troubleshooting

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Conventions Used in This Manual . . . . . . . . . . . . . . . 3

Basic Controls Usage . . . . . . . . . . . . . . . . . . . . . . . . . 4

• SCROLLING MARQUEE DISPLAY

• ACCESSORY NAVIGATOR™ DISPLAY MODULE

CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . 26

Energy Management Module (EMM) . . . . . . . . . . . . 27

Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . 27

Auxiliary (AUX) Board . . . . . . . . . . . . . . . . . . . . . . . . 27

Electronic Expansion Valve (EXV) Board . . . . . . . . 27

Compressor Expansion Board (CXB) . . . . . . . . . . . 27

Enable/Off/Remote Control Switch . . . . . . . . . . . . . 27

Emergency On/Off Switch . . . . . . . . . . . . . . . . . . . . 27

Board Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Control Module Communication . . . . . . . . . . . . . . . 27

• RED LED

• GREEN LED

• YELLOW LED

Carrier Comfort Network®(CCN) Interface . . . . . . . 28

Alarm Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

• ALARM ROUTING CONTROL

• ALARM EQUIPMENT PRIORITY

• COMMUNICATION FAILURE RETRY TIME

• RE-ALARM TIME

• ALARM SYSTEM NAME

Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

• COOLER LEAVING FLUID SENSOR

• COOLER ENTERING FLUID SENSOR

• COMPRESSOR RETURN GAS TEMPERATURE

SENSOR

• OUTDOOR-AIR TEMPERATURE SENSOR (OAT)

• DISCHARGE TEMPERATURE THERMISTOR (DTT)

• REMOTE SPACE TEMPERATURE SENSOR OR DUAL

LEAVING WATER TEMPERATURE SENSOR

Energy Management Module . . . . . . . . . . . . . . . . . . 30

Loss-of-Cooler Flow Protection . . . . . . . . . . . . . . . . 31

Electronic Expansion Valves (EXVs) . . . . . . . . . . . . 31

Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

• MINUTES LEFT FOR START

• MINUTES OFF TIME

• LEAD/LAG DETERMINATION

• LOADING SEQUENCE SELECT

• LOW AMBIENT LOCKOUT

• CAPACITY CONTROL OVERRIDES

• SLOW CHANGE OVERRIDE

Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . .34

• MOTORMASTER® V OPTION

High-Efficiency Variable Condenser Fans . . . . . . . .37

• 30RAP011-060 WITH GREENSPEED® INTELLIGENCE

• FAN DRIVE OPERATION

Operation of Machine Based on Control Method and

Cooling Set Point Selection Settings . . . . . . . . .38

• OCCUPANCY SCHEDULE

• CCN CONTROL

Cooling Set Point Select . . . . . . . . . . . . . . . . . . . . . .39

• SINGLE

• DUAL SWITCH

• DUAL CCN OCCUPIED

• 4 TO 20 MA INPUT

• CONFIGURATION SET POINT LIMITS

Ice Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . .39

Low Sound Mode Operation . . . . . . . . . . . . . . . . . . .40

Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Optional Factory-Installed Hydronic Package . . . .41

Cooler Pump Control . . . . . . . . . . . . . . . . . . . . . . . . .41

Cooler Pump Operation . . . . . . . . . . . . . . . . . . . . . . .41

Cooler Pump Sequence of Operation . . . . . . . . . . .41

• NO INTEGRAL PUMP — SINGLE EXTERNAL PUMP

CONTROL

• NO INTEGRAL PUMP — DUAL EXTERNAL PUMP

CONTROL

• SINGLE INTEGRAL PUMP CONTROL

• DUAL INTEGRAL PUMP CONTROL

Configuring and Operating Dual Chiller Control . .43

Temperature Reset . . . . . . . . . . . . . . . . . . . . . . . . . .43

Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

• DEMAND LIMIT (2-STAGE SWITCH CONTROLLED)

• EXTERNALLY POWERED DEMAND LIMIT (4 TO 20

MA CONTROLLED)

• DEMAND LIMIT (CCN LOADSHED CONTROLLED)

Digital Scroll Option . . . . . . . . . . . . . . . . . . . . . . . . .49

• DIGITAL SCROLL OPERATION

• DIGITAL COMPRESSOR CONFIGURATION

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

START-UP AND OPERATION . . . . . . . . . . . . . . . . . .51

Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Actual Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Check Refrigerant Charge . . . . . . . . . . . . . . . . . . . . .52

Charge Adjustment for Brine Operation . . . . . . . . .52

Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . .52

AquaSnap® 30RAP010-150 Air-Cooled Chillers and

30RAP011-060 Air-Cooled Chillers with

Greenspeed®Intelligence

with Puron®Refrigerant (R-410A)

50/60 Hz

• COOLER FLOW RATES AND LOOP VOLUMES

• LOW-AMBIENT OPERATION

• VOLTAGE — ALL UNITS

OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . 54

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Electronic Components . . . . . . . . . . . . . . . . . . . . . . 54

• CONTROL COMPONENTS

Electronic Expansion Valve (EXV) . . . . . . . . . . . . . . 54

EXV Troubleshooting Procedure . . . . . . . . . . . . . . . 55

• FIELD SERVICING INSTRUCTIONS

• EXV REPLACEMENT (ALL SIZES)

• VALVE MOTOR REPLACEMENT

Compressor Replacement (Fig. 45-47) . . . . . . . . . . 57

Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

• BRAZED-PLATE COOLER HEAT EXCHANGER RE-

PLACEMENT

• BRAZED-PLATE COOLER HEAT EXCHANGER

CLEANING

Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

• ADD OIL

MICROCHANNEL Heat EXCHANGER CONDENSER

COIL MAINTENANCE AND CLEANING

Recommendations . . . . . . . . . . . . . . . . . . . . . . . . 61

Round Tube Plate Fin (RTPF) Condenser Coil

Maintenance and Cleaning Recommendations . 61

• REMOVE SURFACE LOADED FIBERS

• PERIODIC CLEAN WATER RINSE

• ROUTINE CLEANING OF COIL SURFACES

Check Refrigerant Feed Components . . . . . . . . . . . 61

• FILTER DRIER

• MOISTURE-LIQUID INDICATOR

• MINIMUM LOAD VALVE

• PRESSURE RELIEF DEVICES

Check Unit Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . 62

• HIGH-PRESSURE SWITCH

• PRESSURE TRANSDUCERS

• COOLER FREEZE-UP PROTECTION

• HEATER CABLE

• WINTER SHUTDOWN

Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

• REPLACING THERMISTORS (EWT, LWT, RGT)

• THERMISTOR/TEMPERATURE SENSOR CHECK

Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . 67

• TROUBLESHOOTING

Chilled Water Flow Switch . . . . . . . . . . . . . . . . . . . . 67

Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Condenser Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

• METAL (VALUE SOUND) FANS

• AEROACOUSTIC™ (LOW SOUND) FANS

Motormaster® V Controller . . . . . . . . . . . . . . . . . . . . 69

• GENERAL OPERATION

• CONFIGURATION

• DRIVE PROGRAMMING

• EPM CHIP

• LOSS OF CCN COMMUNICATIONS

• REPLACING DEFECTIVE MODULES

Hydronic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

• PUMP PERFORMANCE CHECK

• PUMP MODIFICATIONS AND IMPELLER TRIMMING

• RESET OF CHILLER WATER FLOW

• CHANGING OF PUMP SEALS

• VFD OPERATION

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Recommended Maintenance Schedule . . . . . . . . . . 75

• ROUTINE:

• EVERY MONTH:

• EVERY 3 MONTHS (FOR ALL MACHINES):

• EVERY 6 MONTHS:

• EVERY 12 MONTHS (FOR ALL MACHINES):

CONDENSER COIL MAINTENANCE AND CLEANING

RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . 75

Control Box Maintenance . . . . . . . . . . . . . . . . . . . . 75

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 75

Complete Unit Stoppage and Restart . . . . . . . . . . . 75

• GENERAL POWER FAILURE

• UNIT ENABLE-OFF-REMOTE CONTROL SWITCH IS

OFF

• CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN

• OPEN 24-V CONTROL CIRCUIT BREAKER(S)

• COOLING LOAD SATISFIED

• THERMISTOR FAILURE

• LOW SATURATED SUCTION

• COMPRESSOR SAFETIES

Motor Overload Protection . . . . . . . . . . . . . . . . . . . 86

• COPELAND COMPRESSORS MODELS WITH

ELECTRICAL CODE TF (010-090)

• COPELAND COMPRESSORS MODELS WITH

ELECTRICAL CODE “TW” OR “TE” (010-090) OR

DANFOSS COMPRESSOR (100-150)

Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . 92

• COMPRESSOR FAILURE ALERTS

• POSSIBLE CAUSES

APPENDIX A —DISPLAY TABLES . . . . . . . . . . . . . 97

APPENDIX B —CCN TABLES . . . . . . . . . . . . . . . 114

APPENDIX C —FACTORY SETTINGS FOR PUMP

AND MANUAL STARTERS . . . . . . . . . . . . . . . . 126

APPENDIX D —BACNET COMMUNICATION . . . 127

• TO ADDRESS THE UPC OPEN CONTROLLER

•BACNET DEVICE INSTANCE ADDRESS

APPENDIX E —MAINTENANCE SUMMARY AND LOG

SHEETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

30RAP WEEKLY MAINTENANCE LOG . . . . . . . . . 136

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

START-UP CHECKLIST FOR 30RAP LIQUID

CHILLER. . . . . . . . . . . . . . . . . . . . . CL-1 TO CL-12

SAFETY CONSIDERATIONS

Installing, starting up, and servicing this equipment can be hazard-

ous due to system pressures, electrical components, and equip-

ment location (roof, elevated structures, mechanical rooms, etc.).

Only trained, qualified installers and service mechanics should in-

stall, start up, and service this equipment.

When working on this equipment, observe precautions in the liter-

ature, and on tags, stickers, and labels attached to the equipment,

and any other safety precautions that apply. Follow all safety

codes. Wear safety glasses and work gloves. Use care in handling,

rigging, and setting this equipment, and in handling all electrical

components.

WARNING

Electrical shock can cause personal injury and death. Shut off

all power to this equipment during installation. There may be

more than one disconnect switch. Tag all disconnect locations

to alert others not to restore power until work is completed.

GENERAL

This publication contains Controls, Start-Up, Operation, Service,

and Troubleshooting information for the AquaSnap® 30RAP air-

cooled chillers. See Table 1. These chillers are equipped with

ComfortLink controls and electronic expansion valves (EXVs).

Conventions Used in This Manual

The following conventions for discussing configuration points for

the local display (scrolling marquee or Navigator™ accessory)

will be used in this manual.

Point names will be written with the mode name first, then any

sub-modes, then the point name, each separated by an arrow sym-

bol (. Names will also be shown in bold and italics. As an ex-

ample, the Lead/Lag Circuit Select Point, which is located in the

WARNING

DO NOT VENT refrigerant relief valves within a building.

Outlet from relief valves must be vented outdoors in accor-

dance with the latest edition of ANSI/ASHRAE (American

National Standards Institute/American Society of Heating,

Refrigeration and Air-Conditioning Engineers) 15 (Safety

Code for Mechanical Refrigeration). The accumulation of

refrigerant in an enclosed space can displace oxygen and cause

asphyxiation. Provide adequate ventilation in enclosed or low

overhead areas. Inhalation of high concentrations of vapor is

harmful and may cause heart irregularities, unconsciousness,

or death. Misuse can be fatal. Vapor is heavier than air and

reduces the amount of oxygen available for breathing. Product

causes eye and skin irritation. Decomposition products are

hazardous.

WARNING

DO NOT USE TORCH to remove any component. System

contains oil and refrigerant under pressure.

To remove a component, wear protective gloves and goggles

and proceed as follows:

a. Shut off electrical power to unit.

b. Recover refrigerant to relieve all pressure from system

using both high-pressure and low pressure ports.

c. Traces of vapor should be displaced with nitrogen and

the work area should be well ventilated. Refrigerant in

contact with an open flame produces toxic gases.

d. Cut component connection tubing with tubing cutter and

remove component from unit. Use a pan to catch any oil

that may come out of the lines and as a gage for how

much oil to add to the system.

e. Carefully unsweat remaining tubing stubs when neces-

sary. Oil can ignite when exposed to torch flame.

Failure to follow these procedures may result in personal

injury or death.

CAUTION

DO NOT re-use compressor oil or any oil that has been

exposed to the atmosphere. Dispose of oil per local codes and

regulations. DO NOT leave refrigerant system open to air any

longer than the actual time required to service the equipment.

Seal circuits being serviced and charge with dry nitrogen to

prevent oil contamination when timely repairs cannot be com-

pleted. Failure to follow these procedures may result in dam-

age to equipment.

CAUTION

Compressors and optional hydronic system pumps require

specific rotation. For non-HEVCF (high-efficiency variable

condenser fan) units, test condenser fan(s) first to ensure

proper phasing. Swap any two incoming power leads to cor-

rect condenser fan rotation before starting any other motors.

For HEVCF units, check to ensure the supply power phase

rotation is clockwise A-B-C (L1-L2-L3).

CAUTION

Refrigerant charge must be removed slowly to prevent loss of

compressor oil that could result in compressor failure.

CAUTION

This unit uses a microprocessor control system. Do not short

or jumper between terminations on circuit boards or modules;

control or board failure may result.

Be aware of electrostatic discharge (static electricity) when

handling or making contact with circuit boards or module con-

nections. Always touch a chassis (grounded) part to dissipate

body electrostatic charge before working inside control center.

Use extreme care when handling tools near boards and when

connecting or disconnecting terminal plugs. Circuit boards can

easily be damaged. Always hold boards by the edges and

avoid touching components and connections.

This equipment uses, and can radiate, radio frequency energy.

If not installed and used in accordance with the instruction

manual, it may cause interference to radio communications. It

has been tested and found to comply with the limits for a Class

A computing device pursuant to International Standard in

North America EN61000-2/3 which are designed to provide

reasonable protection against such interference when operated

in a commercial environment. Operation of this equipment in a

residential area is likely to cause interference, in which case

the user, at his own expense, will be required to take whatever

measures may be required to correct the interference.

Always store and transport replacement or defective boards in

anti-static shipping bag.

CAUTION

To prevent potential damage to heat exchanger, always run

fluid through heat exchanger when adding or removing refrig-

erant charge. Use appropriate brine solutions in cooler fluid

loop to prevent the freezing of brazed plate heat exchanger,

optional hydronic section, and/or interconnecting piping when

the equipment is exposed to temperatures below 32°F (0°C).

Proof of flow switch and strainer are factory installed on all

models. Do NOT remove power from this chiller during winter

shutdown periods without taking precaution to remove all

water from heat exchanger and optional hydronic system. Fail-

ure to properly protect the system from freezing may constitute

abuse and may void warranty.

CAUTION

Puron® refrigerant (R-410A) systems operate at higher pres-

sures than standard R-22 systems. Do not use R-22 service

equipment or components on Puron refrigerant equipment. If

service equipment is not rated for Puron refrigerant, equipment

damage or personal injury may result.

Configuration mode, Option sub-mode, would be written as Con-

figuration OPT2LLCS.

This path name will show the user how to navigate through the lo-

cal display to reach the desired configuration. The user would

scroll through the modes and sub-modes using the and

keys. The arrow symbol in the path name represents pressing

to move into the next level of the menu structure.

When a value is included as part of the path name, it will be shown

at the end of the path name after an equals sign. If the value rep-

resents a configuration setting, an explanation will be shown in pa-

rentheses after the value. As an example, Configura-

tionOPT2LLCS = 1 (Automatic).

Pressing the and keys simultaneously will

scroll an expanded text description of the point name or value

across the display. The expanded description is shown in the local

display tables but will not be shown with the path names in text.

The CCN (Carrier Comfort Network®) point names are also refer-

enced in the local display tables for users configuring the unit with

CCN software instead of the local display. The CCN tables are lo-

cated in Appendix B of the manual.

Table 1 — Unit Sizes

Basic Controls Usage

SCROLLING MARQUEE DISPLAY

The scrolling marquee display is the standard interface display to

the ComfortLink Control System for 30RAP units. The display

has up and down arrow keys, an key, and an

key. These keys are used to navigate through the different levels of

the display structure. Press the key until the highest op-

erating level is displayed to move through the top 11 mode levels

indicated by LEDs (light-emitting diodes) on the left side of the

display. See Fig. 1 and Table 2.

Fig. 1 — Scrolling Marquee Display

Once within a mode or sub-mode, pressing the and

keys simultaneously will put the scrolling marquee

display into expanded text mode where the full meaning of all

sub-modes and items and their values can be displayed for the cur-

rent selection. Press the and keys to return

the scrolling marquee display to its default menu of rotating dis-

play items (those items in Run Status



VIEW). In addition, the

password will be disabled, requiring that it be entered again before

changes can be made to password protected items. Press the

key to exit out of the expanded text mode.

NOTE: When the Language Selection (Configuration



DISP



LANG), variable is changed, all appropriate display ex-

pansions will immediately change to the new language. No pow-

er-off or control reset is required when reconfiguring languages.

When a specific item is located, the item name alternates with the

value. Press the key at a changeable item and the value

will be displayed. Press again and the value will begin

to flash indicating that the value can be changed. Use the up and

down arrow keys to change the value, and confirm the value by

pressing the key.

Changing item values or testing outputs is accomplished in the

same manner. Locate and display the desired item. Press

so that the item value flashes. Use the arrow keys to

change the value or state and press the key to accept it.

Press the key to return to the next higher level of struc-

ture. Repeat the process as required for other items.

Items in the Configuration and Service Test modes are password

protected. The words “PASS” and “WORD” will alternate on the

display when required. The default password is 1111. Press

and the 1111 password will be displayed. Press

again and the first digit will begin to flash. Use the ar-

row keys to change the number and press to accept the

digit. Continue with the remaining digits of the password. The

password can only be changed through CCN operator interface

software such as ComfortWORKS™, ComfortVIEW™, and Ser-

vice Tool.

Configuration value cannot be changed while the unit is enabled.

Remote Control-Off-Enable must be in the Off position in order to

change any configuration mode.

See Table 2 and Appendix A for further details. See Table 3 for a

description of operating modes.

UNIT NOMINAL CAPACITY (TONS)

30RAP010 10

30RAP011 10

30RAP015 14

30RAP016 14

30RAP018 16

30RAP020 19

30RAP025 24

30RAP030 28

30RAP035 34

30RAP040 39

30RAP045 43

30RAP050 48

30RAP055 52

30RAP060 56

30RAP070 69

30RAP080 77

30RAP090 85

30RAP100 99

30RAP115 112

30RAP130 126

30RAP150 140

ENTER

ESCAPE ENTER

ENTER ESCAPE

ESCAPE

Run Status

Service Test

Temperature

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

Alarm Status

ENTER

MODE

ESCAPE

ENTER

ESCAPE

ENTER ESCAPE

ESCAPE

ENTER

ESCAPE

ENTER

Table 2 — Scrolling Marquee Display Menu Structure*

LEGEND

Ckt — Circuit

*Throughout this text, the location of items in the menu structure will be described

in the following format:

Item Expansion (Mode Name



Sub-mode Name



ITEM)

For example, using the language selection item:

Language Selection (Configuration



DISP



LANG)

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the dis-

play, except the ability to configure circuit B will be displayed.

MODE RUN

STATUS

SERVICE

TEST TEMPERATURES PRESSURES SET

POINTS INPUTS OUTPUTS CONFIGURATION TIME

CLOCK

OPERATING

MODES ALARMS

SUB-MODE

Auto

View of

Run Status

(VIEW)

Service

Test Mode

(TEST)

Ent and Leave Unit

Temps

(UNIT)

Pressures

Ckt A

(PRC.A)

Cooling

Setpoints

(COOL)

General

Inputs

(GEN.I)

General

Outputs

(GEN.O)

Display

Configuration

(DISP)

Time of Day

(TIME)

Modes

(MODE)

Current

(CRNT)

Unit Run

Hour and Start

(RUN)

Outputs

and Pumps

(OUTS)

Temperatures

Ckt A

(CIR.A)

Pressures

Ckt B

(PRC.B)

Head

Pressure

Setpoint

(HEAD)

Circuit

Inputs

(CRCT)

Outputs

Circuit A

EXV

(A.EXV)

Unit

Configuration

(UNIT)

Month,

Date, Day,

and Year

(DATE)

Reset

Alarms

(RCRN)

Compressor

Run Hours

(HOUR)

Circuit A Comp

Test

(CMPA)

Temperatures

Ckt B

(CIR.B)

Brine

Freeze

Setpoint

(FRZ)

4-20mA

Inputs

(4-20)

Outputs

Circuit B

EXV

(B.EXV)

Unit Options 1

Hardware

(OPT1)

Daylight

Savings

Time

(DST)

Alarm

History

(HIST)

Local

Holiday

Schedules

(HOL.L)

Compressor

Starts

(STRT)

Circuit B Comp

Test

(CMPB)

Outputs

Circuit A

(CIR.A)

Unit Options 2

Controls

(OPT2)

Preventive

Maintenance

(PM)

Outputs

Circuit B

(CIR.B)

CCN Network

Configuration

(CCN)

Schedule

Number

(SCH.N)

Software

Version

(VERS)

Cir. A EXV

Configuration

(EXV.A)

Local

Occupancy

Schedule

(SCH.L)

Cir. B EXV

Configuration

(EXV.B)

Schedule

Override

(OVR)

Motormaster

Configuration

(MM)

Reset Cool Temp

(RSET)

Set Point and

Ramp Load

(SLCT)

Service

Configuration

(SERV)

Broadcast

Configuration

(BCST)

Table 3 — Operating Modes

MODE

NO. ITEM EXPANSION DESCRIPTION

01 CSM CONTROLLING CHILLER Chillervisor System Manager (CSM) is controlling the chiller.

02 WSM CONTROLLING CHILLER Water System Manager (WSM) is controlling the chiller.

03 MASTER/SLAVE CONTROL Dual Chiller control is enabled.

RAMP LOAD LIMITED Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature

is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling

Ramp Loading (Configuration



SLCT



CRMP). The pull-down limit can be modified, if

desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.

TIMED OVERRIDE IN EFFECT Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed sched-

ule, forcing unit to Occupied mode. Override can be implemented with unit under Local

(Enable) or CCN (Carrier Comfort Network®) control. Override expires after each use.

LOW COOLER SUCTION TEMPA Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Satu-

rated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If the

saturated suction temperature is less than the Brine Freeze Point (Set Points



FRZ



BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F (7.8° C)

for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the saturated suction

temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for 90 seconds, a stage

of capacity will be removed from the circuit. The control will continue to decrease capacity as

long as either condition exists.

LOW COOLER SUCTION TEMPB Circuit B cooler Freeze Protection mode. At least one compressor must be on, and the Satu-

rated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If the

saturated suction temperature is less than the Brine Freeze Point (Set Points



FRZ



BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F (7.8° C)

for 2 minutes, a stage of capacity will be removed from the circuit. If the saturated suction tem-

perature is less than the Brine Freeze Point minus 14° F (7.8° C) for 90 seconds, a stage of

capacity will be removed from the circuit. The control will continue to decrease capacity as

long as either condition exists.

09 SLOW CHANGE OVERRIDE Slow change override is in effect. The leaving fluid temperature is close to and moving

towards the control point.

10 MINIMUM OFF TIME ACTIVE Chiller is being held off by Minutes Off Time (Configuration



OPT2



DELY).

DUAL SETPOINT Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set Points



COOL



CSP.1) during occupied periods and Cooling Set Point 2 (Set Points



COOL



CSP.2)

during unoccupied periods.

TEMPERATURE RESET Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leaving

fluid set point upward and is currently controlling to the modified set point. The set point can

be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to 20 mA

signal.

DEMAND/SOUND LIMITED Demand limit is in effect. This indicates that the capacity of the chiller is being limited by

demand limit control option. Because of this limitation, the chiller may not be able to produce

the desired leaving fluid temperature. Demand limit can be controlled by switch inputs or a 4 to

20 mA signal.

COOLER FREEZE PROTECTION Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section for

definition). The chiller will be shut down when either fluid temperature falls below the Freeze

point.

LOW TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and decreas-

ing faster than -0.5° F per minute. Error between leaving fluid and control point exceeds fixed

amount. Control will automatically unload the chiller if necessary.

HIGH TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing.

Error between leaving fluid and control point exceeds fixed amount. Control will automatically

load the chiller if necessary to better match the increasing load.

19 MAKING ICE Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set Points



COOL



CSP.3)

to make ice. The ice done input to the Energy Management Module (EMM) is open.

20 STORING ICE Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set Points



COOL



CSP.2). The ice done input to the Energy Management Module (EMM) is closed.

HIGH SCT CIRCUIT A Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than

the calculated maximum

limit. No additional stages of capacity will be added. Chiller capacity may

be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing

temperature.

HIGH SCT CIRCUIT B Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than

the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity may

be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing

temperature.

23 MINIMUM COMP ON TIME Cooling load may be satisfied, however control continues to operate compressor to ensure proper

oil return. May be an indication of oversized application, low fluid flow rate or low loop volume.

24 PUMP OFF DELAY TIME Cooling load is satisfied, however cooler pump continues to run for the number of minutes set

by the configuration variable Cooler Pump Shutdown Delay (Configuration



OPT1



PM.DY).

25 LOW SOUND MODE Chiller operates at higher condensing temperature and/or reduced capacity to minimize overall

unit noise during evening/night hours (Configuration



OPT2



LS.MD).

AO CIRCUIT A TRIO OIL MGMT Additional stage of capacity is added if circuit operates with only one compressor for an accu-

mulated time of 60 minutes.

BO CIRCUIT B TRIO OIL MGMT

OL OAT LOCKOUT IN EFFECT Chiller will not start due to OAT less than OAT lockout temperature set point (Set

Points



COOL



OAT.L).

ACCESSORY NAVIGATOR™ DISPLAY MODULE

The Navigator module provides a mobile user interface to the

ComfortLink control system, which is only available as a field-in-

stalled accessory. The display has up and down arrow keys, an

key, and an key. These keys are used to nav-

igate through the different levels of the display structure. Press the

key until “Select a Menu Item” is displayed to move

through the top 11 mode levels indicated by LEDs on the left side

of the display. See Fig. 2.

Once within a Mode or sub-mode, a “>” indicates the currently se-

lected item on the display screen. Pressing the and

keys simultaneously will put the Navigator module

into expanded text mode where the full meaning of all sub-modes

and items and their values can be displayed. Pressing the

and keys when the display says “Select

Menu Item” (Mode LED level) will return the Navigator module

to its default menu of rotating display items (those items in Run

Status



VIEW). In addition, the password will be disabled, re-

quiring that it be entered again before changes can be made to

password protected items. Press the key to exit out of

the expanded text mode.

NOTE: When the Language Selection (Configuration



DISP



LANG) variable is changed, all appropriate display ex-

pansions will immediately change to the new language. No pow-

er-off or control reset is required when reconfiguring languages.

When a specific item is located, the item name appears on the left

of the display, the value will appear near the middle of the display,

and the units (if any) will appear on the far right of the display.

Press the key at a changeable item and the value will be-

gin to flash. Use the up and down arrow keys to change the value,

and confirm the value by pressing the key.

Changing item values or testing outputs is accomplished in the

same manner. Locate and display the desired item. Press

so that the item value flashes. Use the arrow keys to change the

value or state and press the key to accept it. Press the

key to return to the next higher level of structure. Re-

peat the process as required for other items.

Items in the Configuration and Service Test modes are password

protected. The words Enter Password will be displayed when re-

quired, with 1111 also being displayed. The default password is

1111. Use the arrow keys to change the number and press

to enter the digit. Continue with the remaining digits of

the password. The password can only be changed through CCN

operator interface software such as ComfortWORKS, Comfort-

VIEW, and Service Tool.

Adjusting the Contrast

The contrast of the display can be adjusted to suit ambient condi-

tions. To adjust the contrast of the Navigator module, press the

key until the display reads, “Select a menu item.” Us-

ing the arrow keys move to the Configuration mode. Press

to obtain access to this mode. The display will read:

> TEST OFF

METR OFF

LANG ENGLISH

Pressing will cause the “OFF” to flash. Use the up or

down arrow to change “OFF” to “ON”. Pressing will il-

luminate all LEDs and display all pixels in the view screen. Press-

ing and simultaneously allows the user to

adjust the display contrast. Use the up or down arrows to adjust

the contrast. The screen’s contrast will change with the adjust-

ment. Press to accept the change. The Navigator module

will keep this setting as long as it is plugged in to the LEN (local

equipment network) bus.

Adjusting the Backlight Brightness

The backlight of the display can be adjusted to suit ambient condi-

tions. The factory default is set to the highest level. To adjust the

backlight of the Navigator module, press the key until

the display reads, “Select a menu item”. Using the arrow keys

move to the Configuration mode. Press to obtain access

to this mode. The display will read:

> TEST OFF

METR OFF

LANG ENGLISH

Pressing will cause the “OFF” to flash. Use the up or

down arrow keys to change “OFF” to “ON”. Pressing

will illuminate all LEDs and display all pixels in the view screen.

Pressing the up and down arrow keys simultaneously allows the

user to adjust the display brightness. Use the up or down arrow

keys to adjust screen brightness. Press to accept the

change. The Navigator module will keep this setting as long as it

is plugged in to the LEN bus.

Fig. 2 — Accessory Navigator™ Display Module

CONTROLS

General

The 30RAP air-cooled scroll chillers contain the ComfortLink

electronic control system that controls and monitors all operations

of the chiller.

The control system is composed of several components as listed in

sections starting on page 26. See Fig. 3-5 for typical control box

drawings. See Fig. 6-19 for wiring. Table 4 lists the drawings by

unit size.

ENTER ESCAPE

ESCAPE

ENTER

ESCAPE

ENTER ESCAPE

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ENTER ESCAPE

ENTER

ESCAPE

ENTER

Run Status

Service Test

Temperatures

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

ENTER

ESC

MODE

Alarm Status

ComfortLink