Specifications

ManualsBrandsCarrier ManualsHousehold Appliances19XRT

Start-Up, Operation, and Maintenance Instructions

SAFETY CONSIDERATIONS

Centrifugal liquid chillers are designed to provide safe

and reliable service when operated within design speci-

ﬁcations. When operating this equipment, use good judg-

ment and safety precautions to avoid damage to equip-

ment and property or injury to personnel.

Be sure you understand and follow the procedures and

safety precautions contained in the chiller instructions

as well as those listed in this guide.

DO NOT VENT refrigerant relief valves within a building. Outlet

from rupture disc or relief valve must be vented outdoors in ac-

cordance with the latest edition of ANSI/ASHRAE 15 (American

National Standards Institute/American Society of Heating, Refrig-

eration, and Air Conditioning Engineers). The accumulation of re-

frigerant in an enclosed space can displace oxygen and cause

asphyxiation.

PROVIDE adequate ventilation in accordance with ANSI/ASHRAE

15, especially for enclosed and low overhead spaces. Inhalation of

high concentrations of vapor is harmful and may cause heart ir-

regularities, 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.

DO NOT USE OXYGEN to purge lines or to pressurize a chiller

for any purpose. Oxygen gas reacts violently with oil, grease, and

other common substances.

NEVER EXCEED speciﬁed test pressures, VERIFY the allowable

test pressure by checking the instruction literature and the design

pressures on the equipment nameplate.

DO NOT USE air for leak testing. Use only refrigerant or dry

nitrogen.

DO NOT VALVE OFF any safety device.

BE SURE that all pressure relief devices are properly installed and

functioning before operating any chiller.

DO NOT WELD OR FLAMECUT any refrigerant line or vessel

until all refrigerant (liquid and vapor) has been removed from chiller.

Traces of vapor should be displaced with dry air or nitrogen and

the work area should be well ventilated. Refrigerant in contact with

an open ﬂame produces toxic gases.

DO NOT USE eyebolts or eyebolt holes to rig chiller sections or

the entire assembly.

DO NOT work on high-voltage equipment unless you are a quali-

ﬁed electrician.

DO NOT WORK ON electrical components, including control pan-

els, switches, starters, or oil heater until you are sure ALL POWER

IS OFF and no residual voltage can leak from capacitors or solid-

state components.

LOCK OPENAND TAG electrical circuits during servicing. IF WORK

IS INTERRUPTED, conﬁrm that all circuits are deenergized be-

fore resuming work.

AVOID SPILLING liquid refrigerant on skin or getting it into the

eyes. USE SAFETY GOGGLES. Wash any spills from the skin

with soap and water. If liquid refrigerant enters the eyes, IMME-

DIATELY FLUSH EYES with water and consult a physician.

NEVER APPLY an open ﬂame or live steam to a refrigerant

cylinder. Dangerous over pressure can result. When it is necessary

to heat refrigerant, use only warm (110 F [43 C]) water.

DO NOT REUSE disposable (nonreturnable) cylinders or

attempt to reﬁll them. It is DANGEROUS AND ILLEGAL. When

cylinder is emptied, evacuate remaining gas pressure, loosen

the collar and unscrew and discard the valve stem. DO NOT

INCINERATE.

CHECK THE REFRIGERANT TYPE before adding refrigerant to

the chiller. The introduction of the wrong refrigerant can cause dam-

age or malfunction to this chiller.

Operation of this equipment with refrigerants other than those

cited herein should comply with ANSI/ASHRAE 15 (latest edi-

tion). Contact Carrier for further information on use of this chiller

with other refrigerants.

DO NOTATTEMPT TO REMOVE ﬁttings, covers, etc., while chiller

is under pressure or while chiller is running. Be sure pressure is at

0 psig (0 kPa) before breaking any refrigerant connection.

CAREFULLY INSPECT all relief devices, rupture discs, and other

relief devices AT LEAST ONCE A YEAR. If chiller operates in a

corrosive atmosphere, inspect the devices at more frequent

intervals.

DO NOT ATTEMPT TO REPAIR OR RECONDITION any relief

device when corrosion or build-up of foreign material (rust, dirt,

scale, etc.) is found within the valve body or mechanism. Replace

the device.

DO NOT install relief devices in series or backwards.

USE CARE when working near or in line with a compressed spring.

Sudden release of the spring can cause it and objects in its path to

act as projectiles.

DO NOT STEP on refrigerant lines. Broken lines can whip about

and release refrigerant, causing personal injury.

DO NOT climb over a chiller. Use platform, catwalk, or staging.

Follow safe practices when using ladders.

USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to lift or

move inspection covers or other heavy components. Even if com-

ponents are light, use mechanical equipment when there is a risk of

slipping or losing your balance.

BE AWARE that certain automatic start arrangements CAN EN-

GAGE THE STARTER, TOWER FAN, OR PUMPS. Open the dis-

connect ahead of the starter, tower fans, or pumps.

USE only repair or replacement parts that meet the code require-

ments of the original equipment.

DO NOT VENT OR DRAIN waterboxes containing industrial brines,

liquid, gases, or semisolids without the permission of your process

control group.

DO NOT LOOSEN waterbox cover bolts until the waterbox has

been completely drained.

DOUBLE-CHECK that coupling nut wrenches, dial indicators, or

other items have been removed before rotating any shafts.

DO NOT LOOSEN a packing gland nut before checking that the

nut has a positive thread engagement.

PERIODICALLY INSPECT all valves, ﬁttings, and piping for cor-

rosion, rust, leaks, or damage.

PROVIDE A DRAIN connection in the vent line near each pres-

sure relief device to prevent a build-up of condensate or rain

water.

19XRT

Hermetic Centrifugal Liquid Chillers

50/60 Hz

with PIC II Controls and HFC-134a

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

Book 2

Tab 5a

PC 211 Catalog No. 531-977 Printed in U.S.A. Form 19XRT-2SS Pg 1 11-98 Replaces: New

Summary of content (112 pages)

PAGE 1
9XRT Hermetic Centrifugal Liquid Chillers 50/60 Hz with PIC II Controls and HFC-134a Start-Up, Operation, and Maintenance Instructions SAFETY CONSIDERATIONS Centrifugal liquid chillers are designed to provide safe and reliable service when operated within design specifications. When operating this equipment, use good judgment and safety precautions to avoid damage to equipment and property or injury to personnel.
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CONTENTS Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 ABBREVIATIONS AND EXPLANATIONS . . . . . . . 4 CHILLER FAMILIARIZATION . . . . . . . . . . . . . . . . . 5-7 Chiller Information Plate . . . . . . . . . . . . . . . . . . . . . . 5 System Components . . . . . . . . . . . . . . . . . . . . . . . . . 5 Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Condenser . . . . . . .
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CONTENTS (cont) Page Carrier Comfort Network Interface . . . . . . . . . . . 53 Check Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 • MECHANICAL STARTER • BENSHAW, INC. REDISTART MICRO SOLID-STATE STARTER Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Power Up the Controls and Check the Oil Heater . . . . . . . . . . . . . . . . . . . . . . 54 • SOFTWARE VERSION Software Configuration . . . . . . . . . . . . . . . . . . . . . .
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CONTENTS (cont) Page Ordering Replacement Chiller Parts . . . . . . . . . . 71 TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . 71-97 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Checking the Display Messages . . . . . . . . . . . . . 71 Checking Temperature Sensors . . . . . . . . . . . . . . 71 • RESISTANCE CHECK • VOLTAGE DROP • CHECK SENSOR ACCURACY • DUAL TEMPERATURE SENSORS Checking Pressure Transducers . . . . . . . . . . . . .
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CHILLER FAMILIARIZATION (Fig. 1 and 2) Turbine — The turbine serves 2 purposes. First, it acts as the expansion device to separate condenser pressure from cooler pressure. Second, using the pressure differential between the cooler and condenser, the turbine converts the pressure drop to energy and uses this energy to supplement the compressor motor, thereby reducing the required horsepower. Chiller Information Plate — The information plate is located on the right side of the chiller control panel.
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1 2 3 7 8 9 10 11 12 13 14 15 5 6 4 16 17 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 — — — — — — — — — — — — — — — — 17 — 18 — 19 — 22 21 20 19 18 17 20 — 21 — 22 — LEGEND Turbine Housing Power Panel Motor Housing Oil Level Sight Glasses Guide Vane Actuator Demistor Vent Line Suction Elbow Chiller Visual Control (CVC) Condenser Pumpout Connection (Hidden) Condenser Relief Valves Relief Transfer Valve Condenser Pressure Transducer (Hidden) Cooler Relief Valve Cooler Pressure Transducer (Hidden
PAGE 7
differential that exists due to compressor operation. After the refrigerant flows past an isolation valve, an in-line filter, and a sight glass/moisture indicator, the flow is split between the motor cooling and oil cooling systems. Flow to the motor cooling system passes through an orifice and into the motor. Once past the orifice, the refrigerant is directed over the motor by a spray nozzle.
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— — — — — — — — — — — — — — — — — 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 — — — — 35 — 31 32 33 34 29 — 30 — 28 — — — — — — — — — — — 1 2 3 4 5 6 7 8 9 10 LEGEND Condenser Tubes Filter/Drier Moisture Indicator Refrigerant Cooling Isolation Valves Main Condenser Liquid Drain Line Float Chamber Vent Subcooler Discharge Isolation Valve (Optional) High Condenser Level Drain Condenser Side Refrigerant Charging Valve Stator Transmission Diffuser Impeller Inlet Guide Vanes Cooler Distribut
PAGE 9
JOURNAL BEARINGS REAR PINION BEARING THRUST THRUST FILTER ISOLATION VALVE OIL SUPPLY LINE SIGHT GLASSES STRAINER FILTER OIL DRAIN CHECK VALVE ISOLATION VALVE THERMAL EXPANSION VALVE BULB OIL SUPPLY PRESSURE TRANSDUCER OIL CHARGE VALVE ISOLATION VALVE OIL COOLER SIGHT GLASS FILTER EDUCTOR STRAINER OIL PUMP AND MOTOR OIL PRESSURE RELIEF VALVE ISOLATION VALVE COOLER OIL RECLAIM LINE Fig.
PAGE 10
STARTING EQUIPMENT The 19XRT requires a motor starter to operate the centrifugal hermetic compressor motor, the oil pump, and various auxiliary equipment. The starter is the main field wiring interface for the contractor. See Carrier Specification Z-415 for specific starter requirements. All starters must meet these specifications in order to properly start and satisfy mechanical safety requirements.
PAGE 11
PIC II System Components — The chiller control system is called PIC II (Product Integrated Control II). See Table 1. The PIC II controls the operation of the chiller by monitoring all operating conditions. The PIC II can diagnose a problem and let the operator know what the problem is and what to check. It promptly positions the guide vanes to maintain leaving chilled water temperature. It can interface with auxiliary equipment such as pumps and cooling tower fans to turn them on when required.
PAGE 12
LEGEND 1 — Condenser Temperature Sensor Connection 2 — Condenser Pressure Transducer Connection TOP VIEW COMPRESSOR AREA Fig.
PAGE 13
INTEGRATED STARTER MODULE (ISM) — This module is located in the starter cabinet. This module initiates commands from the CVC for starter functions such as starting and stopping the compressor, condenser, chilled water pumps, tower fan, spare alarm contacts, and the shunt trip. The ISM monitors starter inputs such as line voltage, motor current, ground fault, remote start contact, spare safety, condenser high pressure, oil pump interlock, starter 1M, and run contacts.
PAGE 14
Fig. 10 — Control Panel Fig.
PAGE 15
CVC Operation and Menus (Fig. 12-18) PRIMARY STATUS MESSAGE COMPRESSOR ONTIME SECONDARY STATUS MESSAGE GENERAL • The CVC display automatically reverts to the default screen after 15 minutes if no softkey activity takes place and if the chiller is not in the pumpdown mode (Fig. 12). • If a screen other than the default screen is displayed on the CVC, the name of that screen is in the upper right corner (Fig. 13). • The CVC may be set to display either English or SI units.
PAGE 16
2. Press NEXT or PREVIOUS to highlight the desired status table.
PAGE 17
DEFAULT SCREEN LOCAL CCN RESET MENU (SOFTKEYS) Start Chiller In CCN Control Start Chiller in Local Control Clear Alarms Access Main Menu STATUS SCHEDULE SETPOINT 1 1 1 1 (ENTER A 4-DIGIT PASSWORD) List the Status Tables List the Service Tables Display The Setpoint Table • MAINSTAT • STARTUP • COMPRESS • HEAT_EX • POWER • ISM_STAT • CVC_PSWD Select a Status Table PREVIOUS NEXT Select a Modification Point PREVIOUS NEXT Modify a Discrete Point START STOP ON OFF Modify an Analog Point INCREASE DECR
PAGE 18
SERVICE TABLE NEXT PREVIOUS SELECT EXIT ALARM HISTORY Display Alarm History (The table holds up to 25 alarms and alerts with the most recent alarm at the top of the screen.
PAGE 19
SERVICE MENU CONTINUED FROM PREVIOUS PAGE ISM (STARTER CONFIG DATA) EQUIPMENT SERVICE 4 4 4 4 (ENTER A 4-DIGIT PASSWORD) Service Tables: • OPTIONS • SETUP1 • SETUP2 • LEADLAG • RAMP_DEM • TEMP_CTL Select a Service Table PREVIOUS NEXT Service Tables: • ISM (STARTER) CONFIG PASSWORD • ISM_CONF SELECT EXIT Select a Service Table Parameter SELECT PREVIOUS NEXT EXIT Modify a Service Table Parameter INCREASE DECREASE QUIT ENABLE DISABLE QUIT ENTER (ANALOG VALUES) ENTER (DISCRETE VALUES) TIME AND
PAGE 20
3. Press SELECT to select the highlighted value. Then: 2. Press NEXT or PREVIOUS to highlight the desired schedule. OCCPC01S — LOCAL Time Schedule OCCPC02S — ICE BUILD Time Schedule OCCPC03S — CCN Time Schedule For Discrete Points — Press lect the desired state. YES NO YES ENTER or NO to se- EXIT 3. Press SELECT to view the desired time schedule. For Analog Points — Press INCREASE or DECREASE to select the desired value. 4.
PAGE 21
2. There are 5 set points on this screen: BASE DEMAND LIMIT, LCW SETPOINT (leaving chilled water set point), ECW SETPOINT (entering chilled water set point), ICE BUILD SETPOINT, and TOWER FAN HIGH SETPOINT. Only one of the chilled water set points can be active at one time. The set point that is active is determined from the SERVICE menu. See the Service Operation section, page 44. The ice build (ICE BUILD) function is also activated and configured from the SERVICE menu. b.
PAGE 22
Table 2 — CVC Display Data 6. Reference Point Names shown in these tables in all capital letters can be read by CCN and BS software. Of these capitalized names, those preceded by a dagger can also be changed (that is, written to) by the CCN, BS, and the CVC. Capitalized Reference Point Names preceded by two asterisks can be changed only from the CVC. Reference Point Names in lower case type can be viewed by CCN or BS only by viewing the whole table. 7.
PAGE 23
Table 2 — CVC Display Data (cont) EXAMPLE 2 — MAINTSTAT DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press STATUS ( MAINSTAT will be highlighted). 3. Press SELECT .
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Table 2 — CVC Display Data (cont) EXAMPLE 4 — COMPRESS DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press STATUS . 3. Scroll down to highlight COMPRESS . 4. Press SELECT .
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Table 2 — CVC Display Data (cont) EXAMPLE 6 — POWER DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press STATUS . 3. Scroll down to highlight POWER . 4. Press SELECT .
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Table 2 — CVC Display Data (cont) EXAMPLE 8 — SETPOINT DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SETPOINT (Base Demand Limit will be highlighted). 3. Press SELECT . DESCRIPTION Base Demand Limit Control Point LCW Set Point ECW Set Point Ice Build Set Point Tower Fan High Set Point STATUS UNITS 40-100 10-120 15-120 15-60 55-105 % DEG DEG DEG DEG F F F F POINT DEFAULT DLM lcw sp ecw sp ice sp TFH SP 100 50.0 60.0 40.
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Table 2 — CVC Display Data (cont) EXAMPLE 10 — OVERRIDE DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight CONTROL ALGORITHM STATUS . 4. Press SELECT . 5. Scroll down to highlight OVERRIDE .
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Table 2 — CVC Display Data (cont) EXAMPLE 12 — ISM HIST DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight CONTROL ALGORITHM STATUS . 4. Press SELECT . 5. Scroll down to highlight ISM HIST .
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Table 2 — CVC Display Data (cont) EXAMPLE 14 — NET OPT DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight EQUIPMENT CONFIGURATION . 4. Press SELECT . 5. Scroll down to highlight NET OPT .
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Table 2 — CVC Display Data (cont) EXAMPLE 16 — OPTIONS DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight EQUIPMENT SERVICE . 4. Press SELECT . 5. Scroll down to highlight OPTIONS . DESCRIPTION Auto Restart Option Remote Contacts Option Soft Stop Amps Threshold Surge/Hot Gas Bypass Surge Limit/HGBP Option Select: Surge = 0, HGBP = 1 Min.
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Table 2 — CVC Display Data (cont) EXAMPLE 18 — SETUP2 DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight EQUIPMENT SERVICE . 4. Press SELECT . 5. Scroll down to highlight SETUP2 .
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Table 2 — CVC Display Data (cont) EXAMPLE 20 — RAMP_DEM DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight EQUIPMENT SERVICE . 4. Press SELECT . 5. Scroll down to highlight RAMP_DEM .
PAGE 33
the DEADBAND. The PROPORTIONAL INC BAND can be adjusted from a setting of 2 to 10; the default setting is 6.5. The response below the control point is called the PROPORTIONAL DEC BAND, and it can slow or quicken the guide vane response to chilled water temperature below the deadband plus the control point. The PROPORTIONAL DEC BAND can be adjusted on the CVC from a setting of 2 to 10. The default setting is 6.0.
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Figure 17 shows a schedule for a typical office building with a 3-hour, off-peak, cool-down period from midnight to 3 a.m., following a weekend shutdown. Holiday periods are in an unoccupied state 24 hours per day. The building operates Monday through Friday, 7:00 a.m. to 6:00 p.m., and Saturdays from 6:00 a.m. to 1:00 p.m. This schedule also includes the Monday midnight to 3:00 a.m. weekend cooldown schedule.
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Table 3 — Protective Safety Limits and Control Settings MONITORED PARAMETER TEMPERATURE SENSOR OUT OF RANGE PRESSURE TRANSDUCERS OUT OF RANGE COMPRESSOR DISCHARGE TEMPERATURE MOTOR WINDING TEMPERATURE BEARING TEMPERATURE EVAPORATOR REFRIGERANT TEMPERATURE TRANSDUCER VOLTAGE CONDENSER PRESSURE — SWITCH — CONTROL OIL PRESSURE LINE VOLTAGE — HIGH — LOW — SINGLE-CYCLE COMPRESSOR MOTOR LOAD STARTER ACCELERATION TIME (Determined by inrush current going below 100% compressor motor load) STARTER TRANSITION CONDEN
PAGE 36
If kilowatts is selected for the DEMAND LIMIT SOURCE, the MOTOR RATED KILOWATTS must be entered (information found on the chiller Requisition form). The TEMP PULLDOWN DEG/MIN may be viewed or modified on the TEMP_CTL screen which is accessed from the EQUIPMENT SERVICE screen. PULLDOWN RAMP TYPE, DEMAND LIMIT SOURCE, and MOTOR LOAD RAMP %/MIN may be viewed or modified on the RAMP_DEM screen. Shunt Trip (Option) — The function of the shunt trip option on the PIC II is to act as a safety trip.
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Table 4 — Capacity Overrides OVERRIDE CAPACITY CONTROL FIRST STAGE SET POINT View/Modify on CVC Screen Default Value Configurable Range SECOND STAGE SET POINT OVERRIDE TERMINATION Value Value .Override Set Point + 2.4 psid (16.5 kPad) .Override Set Point +10° F (6° C) ,Override Set Point HIGH CONDENSER PRESSURE SETUP1 125 psig (862 kPa) 90 to 165 psig (620 to 1138 kPa) HIGH MOTOR TEMPERATURE SETUP1 .200 F (93.
PAGE 38
energize to try to decrease the pressure. The pump will turn off when the condenser pressure is 3.5 psi (24.1 kPa) less than the pressure override or when the condenser refrigerant temperature (CONDENSER REFRIG TEMP) is within 3° F (1.7° C) of the entering condenser water temperature (ENTERING CONDENSER WATER). The tower fan relay control is not a substitute for a condenser water temperature control.
PAGE 39
PREVENTION is on, the point must pass through the deadband region before the HOT GAS BYPASS/SURGE PREVENTION is turned off. Information on modifying the default set points of the minimum and full load points may be found in the Input Service Configurations section, page 54. Corrective action can be taken by making one of 2 choices. If a hot gas bypass line is present and the hot gas option is selected on the OPTIONS table (SURGE LIMIT/HGBP OPTION is set to 1), the hot gas bypass valve can be energized.
PAGE 40
If the entering chilled water control option (ECW CONTROL OPTION) is enabled (configured in TEMP_CTL screen) and a common point sensor is desired (COMMON SENSOR OPTION in LEADLAG screen selected as 1) then the sensor is wired in Spare Temp #2 position on the CCM. When installing chillers in series, a common point sensor should be used. If a common point sensor is not used, the leaving chilled water sensor of the upstream chiller must be moved into the leaving chilled water pipe of the downstream chiller.
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start. If the lag chiller fails to start, the standby chiller, if configured is started. Lag Chiller Shutdown Requirements — The following conditions must be met in order for the lag chiller to be stopped. 1. Lead chiller compressor motor average line current or load value (MOTOR PERCENT KILOWATTS on the MAINSTAT screen) is less than the lead chiller percent capacity. NOTE: Lead chiller percent capacity = 115 – LAG PERCENT CAPACITY.
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BUILD TERMINATION parameter to 2 on the OPTIONS screen. • the end of the ice build time schedule has been reached. LOAD BALANCING — When the LOAD BALANCE OPTION (see LEADLAG screen) is enabled, the lead chiller sets the ACTIVE DEMAND LIMIT in the lag chiller to the lead chiller’s compressor motor load value MOTOR PERCENT KILOWATTS or AVERAGE LINE CURRENT on the MAINSTAT screen). This value has limits of 40% to 100%.
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address of the chiller on which it is mounted. Whenever the controller identification of the CVC changes, the change is reflected automatically in the BUS and ADDRESS columns for the local device. See Fig. 16. Default address for local device is BUS 0 ADDRESS 1. temperature reset option shall be ignored, if enabled, during ice build. The AUTO DEMAND LIMIT INPUT shall also be ignored if enabled during ice build. • ECW CONTROL OPTION and any temperature reset options (configured on TEMP_CTL screen).
PAGE 44
HOLIDAY SCHEDULING (Fig. 22) — The time schedules may be configured for special operation during a holiday period. When modifying a time period, the ‘‘H’’ at the end of the days of the week field signifies that the period is applicable to a holiday. (See Fig. 17.) The broadcast function must be activated for the holidays configured on the HOLIDEF screen to work properly. Access the BRODEF screen from the EQUIPMENT CONFIGURATION table and select ENABLE to activate function.
PAGE 45
WATER FLOW VERIFY TIME (operator-configured, default 5 minutes) expires to confirm flow. After flow is verified, the chilled water temperature is compared to CONTROL POINT plus 1/2 CHILLED WATER DEADBAND. If the temperature is less than or equal to this value, the PIC II turns off the condenser pump relay and goes into a RECYCLE mode. If the water/brine temperature is high enough, the start-up sequence continues and checks the guide vane position.
PAGE 46
Shutdown Sequence — Chiller shutdown begins if any of the following occurs: • the STOP button is pressed for at least one second (the alarm light blinks once to confirm the stop command) • a recycle condition is present (see Chilled Water Recycle Mode section) • the time schedule has gone into unoccupied mode • the chiller protective limit has been reached and chiller is in alarm • the start/stop status is overridden to stop from the CCN network or the CVC When a stop signal occurs, the shutdown sequence fi
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• list of applicable design temperatures and pressures (product data submittal) • chiller certified prints • starting equipment details and wiring diagrams • diagrams and instructions for special controls or options • 19XRT Installation Instructions • pumpout unit instructions To determine if there are any leaks, the chiller should be charged with refrigerant. Use an electronic leak detector to check all flanges and solder joints after the chiller is pressurized.
PAGE 48
Fig.
PAGE 49
5. If no leak is found during the initial start-up procedures, complete the transfer of refrigerant gas from the pumpout storage tank to the chiller (see Transfer Refrigerant from Pumpout Storage Tank to Chiller section, page 64). Retest for leaks. 6. If no leak is found after a retest: a. Transfer the refrigerant to the pumpout storage tank and perform a standing vacuum test as outlined in the Standing Vacuum Test section, below. b.
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Fig. 26 — Optional Pumpout Unit Piping Schematic with Storage Tank Fig.
PAGE 51
Table 5A — HFC-134a Pressure — Temperature (F) TEMPERATURE, F 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 Table 5B — HFC-134a Pressure — Temperature (C) PRESSURE (psig) 6.50 7.52 8.60 9.66 10.79 11.96 13.17 14.42 15.72 17.06 18.45 19.88 21.37 22.90 24.48 26.11 27.80 29.53 31.32 33.17 35.08 37.04 39.06 41.14 43.28 45.48 47.
PAGE 52
Chiller Dehydration — Dehydration is recommended if the chiller has been open for a considerable period of time, if the chiller is known to contain moisture, or if there has been a complete loss of chiller holding charge or refrigerant pressure. Do not start or megohm-test the compressor motor or oil pump motor, even for a rotation check, if the chiller is under dehydration vacuum. Insulation breakdown and severe damage may result. Fig.
PAGE 53
10. Tighten all wiring connections to the plugs on the ISM and CCM modules. 11. On chillers with free-standing starters, inspect the power panel to ensure that the contractor has fed the wires into the bottom of the panel. Wiring into the top of the panel can cause debris to fall into the contactors. Clean and inspect the contactors if this has occurred. 2. On low-voltage compressors (600 v or less) connect a voltmeter across the power wires to the compressor starter and measure the voltage.
PAGE 54
The oil heater is energized by powering the control circuit. This should be done several hours before start-up to minimize oil-refrigerant migration. The oil heater is controlled by the PIC II and is powered through a contactor in the power panel. Starters contain a separate circuit breaker to power the heater and the control circuit. This arrangement allows the heater to energize when the main motor circuit breaker is off for service work or extended shutdowns.
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INPUT EQUIPMENT SERVICE PARAMETERS IF NECESSARY — The EQUIPMENT SERVICE table has six service tables. Configure SERVICE Tables — Access the SERVICE tables, depicted on the next page, to modify or view the following to job site parameters: INPUT TIME AND DATE — Access the TIME AND DATE table on the SERVICE menu. Input the present time of day, date, and day of the week. The HOLIDAY TODAY parameter should only be configured to YES if the present day is a holiday.
PAGE 56
Modify Minimum and Maximum Load Points (DT1/P1; D T2/P2) If Necessary — These pairs of chiller load points, located on the OPTIONS screen, determine when to limit guide vane travel or open the hot gas bypass valve when surge prevention is needed. These points should be set based on individual chiller operating conditions. If after configuring a value for these points, surge prevention is operating too soon or too late for conditions, these parameters should be changed by the operator.
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3. Access the HEAT_EX screen and view the particular transducer reading (the EVAPORATOR PRESSURE or CONDENSER PRESSURE parameter on the HEAT_EX screen). To calibrate oil pressure or waterside flow device, view the particular reading (CHILLED WATER DELTA P and CONDENSER WATER DELTA P on the HEAT_EX screen, and OIL PUMP DELTA P on the COMPRESS screen). It should read 0 psi (0 kPa).
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Table 6 — Control Test Menu Functions TESTS TO BE PERFORMED 1. CCM Thermistors 2. 3. 4. 5. 6. 7. 8. The standard 19XRT chiller is shipped with the refrigerant already charged in the vessels. However, the 19XRT may be ordered with a nitrogen holding charge of 15 psig (103 kPa). Evacuate the nitrogen from the entire chiller, and charge the chiller from refrigerant cylinders.
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NOTE: If the pumps are not automatic, ensure water is circulating properly. Whenever turning the discharge isolation valve, be sure to reattach the valve locking device. This prevents the valve from opening or closing during service work or during chiller operation. Do not permit water or brine that is warmer than 110 F (43 C) to flow through the cooler or condenser. Refrigerant overpressure may discharge through the relief valves and result in the loss of refrigerant charge.
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integral oil pump, isolatable oil filter, extra oil and motor temperature sensors, synthetic oil, and compressor serviceability. MOTOR COMPRESSOR LUBRICATION SYSTEM — Oil pump, cooler filter, oil heater, oil charge and specification, operating and shutdown oil level, temperature and pressure, and oil charging connections. CONTROL SYSTEM — CCN and LOCAL start, reset, menu, softkey functions, CVC operation, occupancy schedule, set points, safety controls, and auxiliary and optional controls.
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Leave the oil charge in the chiller with the oil heater and controls energized to maintain the minimum oil reservoir temperature. 3. The oil level should be visible anywhere in one of the two sight glasses. Foaming oil is acceptable as long as the oil pressure and temperature are within limits. 4. The oil pressure should be between 18 and 30 psid (124 to 207 kPad) differential, as seen on the CVC default screen. Typically the reading will be 18 to 25 psid (124 to 172 kPad) at initial start-up. 5.
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TIME Press. Temp Refrigerant In Water Out GPM Pressure COOLER MACHINE MODEL NO. In Out Temp Press. Temp Refrigerant In Out GPM Pressure Water CONDENSER In Out Temp MACHINE SERIAL NO. BEARING TEMP Fig. 30 — Refrigeration Log REMARKS: Indicate shutdowns on safety controls, repairs made, oil or refrigerant added or removed, air exhausted and water drained from dehydrator. Include amounts. DATE Plant Press. Diff.
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3. Refer to Fig. 26, 27, and 32 for valve locations and numbers. PUMPOUT AND REFRIGERANT TRANSFER PROCEDURES Preparation — The 19XRT may come equipped with an optional pumpout storage tank, pumpout system, or pumpout compressor. The refrigerant can be pumped for service work to either the chiller compressor vessel or chiller condenser vessel by using the optional pumpout system. If a pumpout storage tank is supplied, the refrigerant can be isolated in the storage tank.
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l. Turn off pumpout condenser water. TRANSFER REFRIGERANT FROM CHILLER TO PUMPOUT STORAGE TANK Chillers with Storage Tanks — If the chiller has isolation valves, leave them open for the following procedures. The letter ‘‘C’’ describes a closed valve. See Fig. 15, 16, 26, and 27. TRANSFER REFRIGERANT FROM PUMPOUT STORAGE TANK TO CHILLER 1. Equalize refrigerant pressure. a.
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2. Evacuate the refrigerant gas from the chiller condenser vessel. a. Access the PUMPDOWN LOCKOUT function accessed from the CVC CONTROL TEST table to turn on the chiller water pumps. Turn the chiller water pumps on manually if they are not controlled by the PIC II. b. Close pumpout unit valves 3 and 4; open valves 2 and 5.
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GENERAL MAINTENANCE Refrigerant Properties — The standard refrigerant for the 19XRT chiller is HFC-134a. At normal atmospheric pressure, HFC-134a will boil at –14 F (–25 C) and must, therefore, be kept in pressurized containers or storage tanks. The refrigerant is practically odorless when mixed with air and is noncombustible at atmospheric pressure. Read the Material Safety Data Sheet and the latest ASHRAE Safety Guide for Mechanical Refrigeration to learn more about safe handling of this refrigerant.
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Service Ontime — The CVC will display a SERVICE ONTIME value on the MAINSTAT screen. This value should be reset to zero by the service person or the operator each time major service work is completed so that the time between service can be viewed and tracked. Inspect the Control Panel — Maintenance consists of general cleaning and tightening of connections. Vacuum the cabinet to eliminate dust build-up.
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Oil Specification — If oil is added, it must meet the following Carrier specifications: Oil Type for units using R-134a . . . . . . . . . . . . . . Inhibited polyolester-based synthetic compressor oil formatted for use with HFC, gear-driven, hermetic compressors. ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Inspect Refrigerant Float System — Perform this inspection every 5 years or when the condenser is opened for service. 1.
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INTERNAL SIDE VIEW (FLOAT VALVES REMOVED) Fig. 34 — 19XRT Float Chamger *Nozzle locations are consecutively numbered and the number is located next to the appropriate hole. The flow dividers can be physically different and must not be interchanged when inspecting or cleaning the nozzle assembly. Fig.
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Inspect the Heat Exchanger Tubes and Flow Devices Inspect the Starting Equipment — Before working on any starter, shut off the chiller and open all disconnects supplying power to the starter. COOLER AND FLOW DEVICES — Inspect and clean the cooler tubes at the end of the first operating season. Because these tubes have internal ridges, a rotary-type tube cleaning system is needed to fully clean the tubes.
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• The CONTROL ALGORITHM STATUS screens (which include the CAPACITY, OVERRIDE, LL_MAINT, ISM_HIST, LOADSHED, WSMDEFME, and OCCDEFCM screens) display information that helps to diagnose problems with chilled water temperature control, chilled water temperature control overrides, hot gas bypass, surge algorithm status, and time schedule operation.
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CHECK SENSOR ACCURACY — Place the sensor in a medium of known temperature and compare that temperature to the measured reading. The thermometer used to determine the temperature of the medium should be of laboratory quality with 0.5° F (.25° C) graduations. The sensor in question should be accurate to within 2° F (1.2° C). See Fig. 7 for sensor locations. The sensors are immersed directly in the refrigerant or water circuits. The wiring at each sensor is easily disconnected by unlatching the connector.
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Table 8 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides A. MANUAL STOP PRIMARY MESSAGE SECONDARY MESSAGE MANUALLY STOPPED — PRESS CCN OR LOCAL TO START TERMINATE PUMPDOWN MODE TO SELECT CCN OR LOCAL SHUTDOWN IN PROGRESS SHUTDOWN IN PROGRESS ICE BUILD PROBABLE CAUSE/REMEDY PIC II in OFF mode, press CCN or LOCAL softkey to start unit. Enter the CONTROL TEST table and select TERMINATE LOCKOUT to unlock compressor.
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Table 8 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) D. PRE-START ALERTS: These alerts only delay start-up. When alert is corrected, the start-up will continue. No reset is necessary. PRIMARY MESSAGE PRESTART ALERT PRESTART ALERT SECONDARY MESSAGE STARTS LIMIT EXCEEDED HIGH BEARING TEMPERATURE ALARM MESSAGE PRIMARY CAUSE 100->Excessive compressor starts (8 in 12 hours) 101->Comp Thrust Bearing Temp [VALUE] exceeded limit of [LIMIT]*.
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Table 8 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) F.
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Table 8 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) I.
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Table 8 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) I. CHILLER PROTECT LIMIT FAULTS (cont) PRIMARY MESSAGE PROTECTIVE LIMIT SECONDARY MESSAGE OIL PRESS SENSOR FAULT ALARM MESSAGE PRIMARY CAUSE 227->Oil Pump Delta P [VALUE] exceeded limit of [LIMIT]*. 228 PROTECTIVE LIMIT LOW OIL PRESSURE 228->Oil Pump Delta P [VALUE] exceeded limit of [LIMIT].
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Table 8 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) I. CHILLER PROTECT LIMIT FAULTS (cont) PRIMARY MESSAGE PROTECTIVE LIMIT SECONDARY MESSAGE INVALID DIFFUSER CONFIG 247 PROTECTIVE LIMIT DIFFUSER POSITION FAULT 248 PROTECTIVE LIMIT SPARE TEMPERATURE #1 249 PROTECTIVE LIMIT SPARE TEMPERATURE #2 STATE 246 ALARM MESSAGE PRIMARY CAUSE 246->Diffuser Control Invalid Configuration: Check SETUP2 Entries.
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Table 8 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) J.
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Table 9A — Thermistor Temperature (F) vs Resistance/Voltage Drop TEMPERATURE VOLTAGE RESISTANCE (F) DROP (V) (Ohms) −25 4.821 98,010 −24 4.818 94,707 −23 4.814 91,522 −22 4.806 88,449 −21 4.800 85,486 −20 4.793 82,627 −19 4.786 79,871 −18 4.779 77,212 −17 4.772 74,648 −16 4.764 72,175 −15 4.757 69,790 −14 4.749 67,490 −13 4.740 65,272 −12 4.734 63,133 −11 4.724 61,070 −10 4.715 59,081 −9 4.705 57,162 −8 4.696 55,311 −7 4.688 53,526 −6 4.676 51,804 −5 4.666 50,143 −4 4.657 48,541 −3 4.648 46,996 −2 4.
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Table 9B — Thermistor Temperature (C) vs Resistance/Voltage Drop TEMPERATURE (C) −40 −39 −38 −37 −36 −35 −34 −33 −32 −31 −30 −29 −28 −27 −26 −25 −24 −23 −22 −21 −20 −19 −18 −17 −16 −15 −14 −13 −12 −11 −10 −9 −8 −7 −6 −5 −4 −3 −2 −1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 VOLTAGE DROP (V) 4.896 4.889 4.882 4.874 4.866 4.857 4.848 4.838 4.828 4.817 4.806 4.794 4.782 4.769 4.755 4.740 4.725 4.710 4.693 4.676 4.657 4.639 4.
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Control Modules Notes on Module Operation 1. The chiller operator monitors and modifies configurations in the microprocessor by using the 4 softkeys and the CVC. Communications between the CVC and the CCM is accomplished through the SIO (Sensor Input/Output) bus, which is a phone cable. The communication between the CCM and ISM is accomplished through the sensor bus, which is a 3-wire cable. 2. If a green LED is on continuously, check the communication wiring.
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8. Access the MAINSTAT table and highlight the TOTAL COMPRESSOR STARTS parameter. Press the SELECT softkey. Increase or decrease the value to match the starts value recorded in Step 3. Press the ENTER softkey when you reach the correct value. Now, move the highlight bar to the COMPRESSOR ONTIME parameter. Press the SELECT softkey. Increase or decrease the run hours value to match the value recorded in Step 2. Press the ENTER softkey when the correct value is reached. Chiller Control Module (CCM) (Fig.
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J11 DISCRETE OUTPUTS J12 DISCRETE OUTPUTS J1 24 VAC ANALOG OUT J8 SIO J7 SIO J6 SW2 V/I INPUTS J5 STAT COMM THERMISTORS J4 PRESSURE J2 DIFF PRESSURE J3 Fig. 38 — Chiller Control Module (CCM) J9 J8 J7 COM STAT INTEGRATED STARTER MODULE J1 FUSE J2 J3-1 J3-2 J3-3 Fig.
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5. Using an ohmmeter, perform the following resistance measurements and record the results: MEASURE BETWEEN T1 and T6 T2 and T4 T3 and T5 6. 7. 8. 9. 10. SCR PAIRS BEING CHECKED 3 and 6 2 and 5 1 and 4 Care must be taken to prevent nut rotation while tightening the bolts. If the nut rotates while tighting the bolt, SCR replacement must be started over. RECORDED VALUE 6. Reconnect the red (cathode) wire from the SCR and the white (anode-gate) wire to the appropriate location on the firing card (i.e.
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Table 10 — Heat Exchanger Data ENGLISH SI Dry (Rigging) Weight Refrigerant Water Dry (Rigging) Weight Refrigerant Water CODE (lb)* (lb) (lb) (kg)* (kg) (kg) Cooler Condenser Cooler Condenser Cooler Condenser Cooler Condenser Cooler Condenser Cooler Condenser 60 8,997 10,050 1230 1580 800 1023 4080 4558 558 717 363 464 61 9,462 10,610 1480 1580 933 1183 4291 4812 671 717 423 537 62 9,926 11,156 1720 1580 1065 1339 4502 5059 780 717 483 607 63 10,391 11,703 1970 1580 1198 1495 4712 5307 893 717 543 678 *Riggi
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Table 14 — Optional Pumpout System Electrical Data MOTOR CODE 1 4 5 6 CONDENSER UNIT 19EA47-748 19EA42-748 19EA44-748 19EA46-748 VOLTS-PH-Hz 575-3-60 200/208-3-60 230-3-60 400/460-3-50/60 MAX RLA 3.8 10.9 9.5 4.7 Table 16 — Motor Voltage Code Code 60 61 62 63 64 65 66 67 68 69 50 51 52 53 54 55 LRA 23.0 63.5 57.5 28.
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COMPRESSOR, TRANSMISSION, MOTOR AREA COMPRESSOR ASSEMBLY TORQUES ITEM DESCRIPTION 1* 2 3 4 5† 6* 7* Oil Heater Grommet Nut Bull Gear Retaining Bolt Demister Bolts Impeller Retaining Bolt Motor Terminals (Low Voltage) Guide Vane Shaft Seal Nut Motor Terminals (High Voltage) — Insulator — Packing Nut — Brass Jam Nut Turbine Retaining Bolt 8† TORQUE ft-lb N•m 10 14 80-85 108-115 15-19 20-26 44-46 60-62 50 68 25 34 2-4 5 10 50-60 2.7-5.4 6.8 13.6 75-81 LEGEND N•m _ Newton Meters *Not shown.
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VIEW B HIGH SPEED SHAFT VIEW C TURBINE AREA Fig.
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Fig.
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Fig. 42 — Electronic PIC II Control Panel Wiring Schematic (Frame 2, 3, 4 Compressor) (cont) LEGEND AUX BRG C CB CCM CCN COMP’R COND CVC DISCH ENT EVAP — — — — — — — — — — — — Auxiliary Bearing Contactor Circuit Breaker Chiller Control Module Carrier Comfort Network Compressor Condenser Chiller Visual Controller Discharge Entering Evaporator EXT FR GV HGBP HT EXCHD ISM L LVG N.O.
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AUX C CB CCM COMM COMPR DISCH FR G GRD GVA HGBP — — — — — — — — — — — — Auxiliary Contactor Circuit Breaker Chiller Control Module Communication Compressor Discharge Frame Ground Ground Guide Vane Actuator Hot Gas Bypass — — — — — — — — Heat Exchanger Integrated Starter Module Main Power Supply Normally Open Pressure Requirement Transformer Terminal Board Fig. 43 — Power Panel Wiring Schematic HT EXCH ISM L N.O.
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NOTE: Power factor correction capacitors (when required) are connected ahead of all current transformers for proper calibration and sensing by the ISM and IQDP4130.
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Fig. 45 — Benshaw, Inc.
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LEGEND G — AUX — Auxiliary L — BR — Bridge Rectifier LL — CB — Circuit Breaker M — COMM — Communication O/L — COND — Condenser — CPU — Central Processing Unit S SCR — CVC — Chiler Visual Controller ST — CT — Current Transformer TB — EVAP — Evaporator FU — Fuse NOTES: LED status with power applied and prior to 1 2 3 4 Ground Main Supply Power Control Power Supply Contactor Overload Reset Contactor Silicone Controller Rectifier Shunt Trip Terminal Block run command.
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Fig.
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Fig.
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INDEX Abbreviations and Explanations, 4 After Limited Shutdown, 61 Attach to Network Device Control, 43 Automatic Soft Stop Amps Threshold, 46 Auto.
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Copyright 1998 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 2 PC 211 Catalog No. 531-977 Printed in U.S.A.
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - INITIAL START-UP CHECKLIST FOR 19XRT HERMETIC CENTRIFUGAL LIQUID CHILLER (Remove and use for job file.) MACHINE INFORMATION: NAME JOB NO.
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INSPECT WIRING AND RECORD ELECTRICAL DATA: RATINGS: Motor(s) Amps Motor Voltage Line Voltages: Motor Oil Pump Voltage Oil Pump Starter LRA Rating Controls/Oil Heater FIELD-INSTALLED STARTERS ONLY: Check continuity T1 to T1, etc. (Motor to starter, disconnect motor leads T4, T5, T6.) Do not megger solid-state starters; disconnect leads to motor and megger the leads.
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19XRT PIC II SETPOINT TABLE CONFIGURATION SHEET DESCRIPTION Base Demand Limit LCW Setpoint ECW Setpoint Ice Build Setpoint Tower Fan High Setpoint RANGE 40 to 100 10 to 120 15 to 120 15 to 60 55 to 105 UNITS % DEG F DEG F DEG F DEG F DEFAULT 100 50.0 60.0 40.
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19XRT PIC II TIME SCHEDULE CONFIGURATION SHEET Day Flag M T W T F S S H OCCPC01S Occupied Time Unoccupied Time Period 1: Period 2: Period 3: Period 4: Period 5: Period 6: Period 7: Period 8: NOTE: Default setting is OCCUPIED 24 hours/day. ICE BUILD 19XRT PIC II TIME SCHEDULE CONFIGURATION SHEET Day Flag M T W T F S S H OCCPC02S Occupied Time Unoccupied Time Period 1: Period 2: Period 3: Period 4: Period 5: Period 6: Period 7: Period 8: NOTE: Default setting is UNOCCUPIED 24 hours/day.
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19XRT PIC II ISM_CONF TABLE CONFIGURATION SHEET DESCRIPTION Starter Type (0=Full, 1=Red, 2=SS/VFD) Motor Rated Line Voltage Volt Transformer Ratio: 1 Overvoltage Threshold Undervoltage Threshold Over/Under Volt Time Voltage % Imbalance Voltage Imbalance Time Motor Rated Load Amps Motor Lo
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19XRT PIC II OPTIONS TABLE CONFIGURATION SHEET DESCRIPTION Auto Restart Option Remote Contacts Option Soft Stop Amps Threshold Surge/Hot Gas Bypass Surge Limit/HGBP Option Select: Surge=0, HGBP=1 Min. Load Point (T1/P1) Surge/HGBP Delta T1 Surge/HGBP Delta P1 Full Load Point (T2/P2) Surge/HGBP Delta T2 Surge/HGBP Delta P2 Surge/HGBP Deadband RANGE 0/1 0/1 40 to 100 UNITS DSABLE/ENABLE DSABLE/ENABLE % 0/1 DEFAULT DSABLE DSABLE 100 0 0.5 to 20 30 to 170 ^F PSI 1.5 50 0.5 to 20 50 to 170 0.
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19XRT PIC II SETUP1 TABLE CONFIGURATION SHEET DESCRIPTION Comp Motor Temp Override Cond Press Override Comp Discharge Alert Comp Thrust Brg Alert RANGE 150 to 200 90 to 165 125 to 200 165 to 185 UNITS DEG F PSI DEG F DEG F DEFAULT 200 125 200 175 Chilled Medium Chilled Water Deadband
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19XRT PIC II SETUP2 TABLE CONFIGURATION SHEET DESCRIPTION Capacity Control Proportional Inc Band Proportional Dec Band Proportional ECW Gain STATUS UNITS DEFAULT 2 to 10 2 to 10 1 to 3 Guide Vane Travel Limit 30 to 100 % 80 VFD Speed Control VFD Option VFD Gain VFD Increase Step VFD Minimum Speed VFD Maximum Speed 0/1 0.1 to 1.5 1 to 5 65 to 100 90 to 100 DSABLE/ENABLE DSABLE 0.75 2 70 100 6.5 6.0 2.
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19XRT PIC II LEADLAG TABLE CONFIGURATION SHEET DESDRIPTION Lead Lag Control LEAD/LAG Configuration DSABLE=0, LEAD=1, LAG=2, STANDBY=3 Load Balance Option Common Sensor Option LAG Percent Capacity LAG Address LAG START Timer LAG STOP Timer PRESTART FAULT Timer STANDBY Chiller Option STANDB
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19XRT PIC II RAMP_DEM TABLE CONFIGURATION SHEET DESCRIPTION Pulldown Ramp Type: Select: Temp=0, Load=1 Demand Limit + kW Ramp Demand Limit Source Select: Amps=0, kW=1 Motor Load Ramp % Min Demand Limit Prop Band Demand Limit At 20 mA 20 mA Demand Limit Opt Motor Rated Kilowatts Demand Watts Interval RANGE 0/1 UNITS DEFAULT 1 0/1 0 5 to 20 3 to 15 40 to 100 0/1 50 to 9999 5 to 60 10 10 40 DSABLE 145 15 % % DSABLE/ENABLE kW MIN VALUE 19XRT PIC II TEMP_CTL TABLE CONFIGURAITON SHEET DESCRIPTION Cont
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - BROADCAST (BRODEF) CONFIGURATION SHEET DESCRIPTION Time Broadcast Enable Daylight Savings Start Month Start Day of Week Start Week Start Time Start Advance Stop Month Stop Day of Week Stop Week Stop Time Stop Back RANGE 0/1 1 to 12 1 to 7 1 to 5 00:00 to 24:00 0 to 360 1 to 12 1 to 7 1 t
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Copyright 1998 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 2 PC 211 Catalog No. 531-977 Printed in U.S.A.