Carrier 19EF Series Start Up & Operation Manual

Hermetic centrifugal liquid chillers 50/60 hz with hfc-134a

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Start-Up, Operation, and Maintenance Instructions

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 machine instruc-

tions 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 ASHRAE 15 (American Society

of Heating, Refrigeration and Air Conditioning Engineers). The ac-

cumulation of refrigerant in an enclosed space can displace oxygen

and cause asphyxiation.

PROVIDE adequate ventilation in accordance with ASHRAE 15,

latest edition, especially for enclosed and low overhead spaces. In-

halation 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 avail-

able for breathing. Product causes eye and skin irritation. Decom-

position products are hazardous.

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

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 machine.

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 machine 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 OPEN AND TAG electrical circuits during servicing. IF WORK

IS INTERRUPTED, conﬁrm that all circuits are deenergized be-

fore resuming work.

DO NOT siphon refrigerant.

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 cyl-

inder. Dangerous over pressure can result. When it is necessary to

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

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. 531-968

Tab

Hermetic Centrifugal Liquid Chillers

SAFETY CONSIDERATIONS

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 machine. The introduction of the wrong refrigerant can cause

damage or malfunction to this machine.

Operation of this equipment with refrigerants other than those

cited herein should comply with ASHRAE-15 (latest edition). Con-

tact Carrier for further information on use of this machine with other

refrigerants.

DO NOT ATTEMPT TO REMOVE ﬁttings, covers, etc., while ma-

chine is under pressure or while machine is running. Be sure pres-

sure 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 machine 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 machine. 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. Shut off the

machine or pump before servicing equipment.

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.

Printed in U.S.A.

Form 19EF-3SS

50/60 Hz

with HFC-134a

Pg 1

4-95

Replaces: 19EF-2SS

19EF

Table of Contents

Summary of Contents for Carrier 19EF Series

Page 1: Safety Considerations
Operation of this equipment with refrigerants other than those cited herein should comply with ASHRAE-15 (latest edition). Con- tact Carrier for further information on use of this machine with other refrigerants. DO NOT VENT refrigerant relief valves within a building. Outlet DO NOT ATTEMPT TO REMOVE ﬁttings, covers, etc., while ma-...
Page 2: Table Of Contents
Inspect Wiring ......40 • OVERRIDE OPERATIONS Carrier Comfort Network Interface ... 40 • TIME SCHEDULE OPERATION Check Starter .
Page 3 Refrigerant Leak Rate ..... . . 50 INITIAL START-UP CHECKLIST FOR Test After Service, Repair, or Major Leak ..50 19EF HERMETIC CENTRIFUGAL • REFRIGERANT TRACER • TO PRESSURIZE WITH DRY NITROGEN...
Page 4: Introduction
INTRODUCTION MACHINE FAMILIARIZATION (Fig. 1 and 2) Prior to initial start-up of the 19EF unit, those involved in the start-up, operation, and maintenance should be thor- Machine Information Plate — The information plate oughly familiar with these instructions and other necessary is located on the left side of the machine control center panel.
Page 5 19EF 56 26- 453 A DF Motor Size Model Description Hermetic Centrifugal Liquid Chiller Gear Size A, B, C, D Cooler Size 26, 56 Compressor Code Condenser Size 421 - 469 Fig. 1 — 19EF Identiﬁcation 1 — Condenser Waterbox Vent 15 —...
Page 6: Motor Cooling Cycle
FLOAT VALVE CHAMBER FLASH GAS COMPRESSOR MOTOR CHAMBER COOLING CIRCUIT COMPRESSOR FLASH ECONOMIZER HIGH SIDE LOW SIDE FLOAT FLOAT VALVE CHAMBER CHAMBER DRAIN FLOW EQUALIZER REFRIGERANT VAPOR PLATES COOLER REFRIGERANT LIQUID CHILLED CHILLED WATER WATER Fig. 3 — 19EF Refrigeration Cycle...
Page 7: Lubrication Cycle
VALVE 9 TRANSMISSION COOLER 7 SIGHT GLASSES 5 OIL HEATER OIL RESERVOIR LOW OIL PRESSURE SWITCH CONNECTIONS OIL FILTER 21 OIL PUMP/ PRESSURE TEMPERATURE 2 DRAIN AND REFRIGERANT RETURN REGULATOR SENSOR CHARGING VALVE TO COOLER Fig. 4 — 19EF Lubrication Cycle...
Page 8: Oil Reclaim System
PIC. This module contains all of the operating soft- whether a value is above or below a set point or boundary ware needed to control the machine. The 19EF uses 3 pres- by generating an on/off, high/low, or open/closed signal.) sure transducers and 8 thermistors to sense pressures and VOLATILE MEMORY —...
Page 9 20 mA signals are ﬁeld-installed. The spare temperature sensors must have the same temperature/resistance curve as the other temperature sen- sors on this unit. These sensors are 5,000 ohm at 75 F (25 C). Fig. 5 — 19EF Controls and Sensor Locations...
Page 10 Fig. 5 — 19EF Controls and Sensor Locations (cont)
Page 11: Oil Heater Contactor (1C)
Fig. 6 — Control Sensors (Temperature) Fig. 7 — Control Sensors (Pressure Transducer, Typical) LEGEND 1 — LID 2 — PSIO 3 — 8-Input Module (One of 2 Available) 4 — 5-Volt Transducer Power Supply 5 — 6-Pack Relay Board 6 —...
Page 12: Control Transformers (T1-T4)
CONTROL TRANSFORMERS (T1-T4) — These trans- formers convert incoming control voltage to 21 vac power for the PSIO module and options modules, or 24 vac power for 3 power panel contactor relays, and 3 control solenoid valves. They are located in the power panel. CONTROLAND OIL HEATER VOLTAGE SELECTOR (S1) —...
Page 15: Menu Structure
MENU STRUCTURE — To perform any of the operations 1. On the Menu screen, press STATUS to view the list of described below, the PIC must be powered up and have suc- Point Status tables. cessfully completed its self test. •...
Page 16: To View And Change Set Points
3. Press RELEASE to remove the override and return the point to the PIC’s automatic control. Override Indication — An override value is indicated by ‘‘SUPVSR,’’ ‘‘SERVC,’’ or ‘‘BEST’’ ﬂashing next to the point value on the Status table. TO VIEW OR CHANGE TIME SCHEDULE OPERATION (Fig.
Page 17: Service Operation
2. There are 4 set points on this screen: Base Demand Limit; 5. Press INCREASE or DECREASE to change the se- LCW Set Point (leaving chilled water set point); ECW lected set point value. Set Point (entering chilled water set point); and ICE BUILD set point.
Page 18 Table 2 — LID Screens (cont) EXAMPLE 2 — STATUS02 DISPLAY SCREEN To access this display from the LID default screen: 1. Press MENU 2. Press STATUS . 3. Scroll down to highlight STATUS02. 4. Press SELECT . POINT TYPE REFERENCE POINT NAME DESCRIPTION UNITS...
Page 19 Table 2 — LID Screens (cont) EXAMPLE 5 — CONFIGURATION (CONFIG) DISPLAY SCREEN To access this display from the LID default screen: 1. Press MENU 2. Press SERVICE . 3. Scroll down to highlight EQUIPMENT CONFIGURATION. 4. Press SELECT . 5.
Page 20 Table 2 — LID Screens (cont) EXAMPLE 7 — SERVICE1 DISPLAY SCREEN To access this display from the LID default screen: 1. Press MENU 2. Press SERVICE . 3. Scroll down to highlight EQUIPMENT SERVICE. 4. Press SELECT . 5. Scroll down to highlight SERVICE1. 6.
Page 21 Table 2 — LID Screens (cont) EXAMPLE 8 — SERVICE2 DISPLAY SCREEN To access this display from the LID default screen: 1. Press MENU 2. Press SERVICE . 3. Scroll down to highlight EQUIPMENT SERVICE. 4. Press SELECT . 5. Scroll down to highlight SERVICE2. 6.
Page 22 Table 2 — LID Screens (cont) EXAMPLE 10 — MAINTENANCE (MAINT01) DISPLAY SCREEN To access this display from the LID default screen: 1. Press MENU 2. Press SERVICE . 3. Scroll down to highlight ALGORITHM STATUS. 4. Press SELECT . 5.
Page 23 Table 2 — LID Screens (cont) EXAMPLE 12 — MAINTENANCE (MAINT03) DISPLAY SCREEN To access this display from the LID default screen: 1. Press MENU 2. Press SERVICE . 3. Scroll down to highlight CONTROL ALGORITHM STATUS. 4. Press SELECT . 5.
Page 24: Pic System Functions
the guide vanes. It will compare the set point to either COM- PIC System Functions PRESSOR MOTOR LOAD or COMPRESSOR MOTOR CUR- NOTE: Throughout this manual, words printed in capital let- RENT (percentage), depending on how the control is con- ters and italics are values that may be viewed on the LID.
Page 25: Shunt Trip
• low cooler refrigerant temperature/pressure If the controller initiates a safety shutdown, it displays the • condenser high pressure or low pressure fault on the LID with a primary and a secondary message, • inadequate water/brine cooler and condenser ﬂow and energizes an alarm relay in the starter and blinks the •...
Page 26: Flow Switch (Field Supplied)
DOWN, and SELECT RAMP TYPE may be viewed/modified the recycle mode. on the LID Equipment Conﬁguration table, Conﬁg table (see Table 2). Motor load is the default type. CUT-OUT SETTING ADJUSTMENT SCREW Fig. 17 — 19EF Flow Switch (Field Supplied)
Page 27: Oil Sump Temperature Control
Table 4 — Capacity Overrides SECOND STAGE OVERRIDE FIRST STAGE SET POINT OVERRIDE SET POINT TERMINATION CAPACITY View/Modify CONTROL Default Value Conﬁgurable Range Value Value on LID Screen Override HIGH CONDENSER Equipment 125 psi 90 to 200 psi Override Set Point PRESSURE Service1 (862 kPa)
Page 28: Condenser Freeze Protection
Condenser Freeze Prevention — Water/Brine Reset — This control al- Three types of chilled water or gorithm helps prevent condenser tube freeze-up by energiz- brine reset are available and can be viewed or modiﬁed on ing the condenser pump relay. If the pump is controlled by the Equipment Conﬁguration table Conﬁg selection.
Page 29: Demand Limit Control, Option (Requires Optional 8-Input Module)
Fig. 18 and 19. The two sets of load points on this Fig. 18 — 19EF Hot Gas Bypass/Surge Prevention graph (default settings are shown) describe a line which the algorithm uses to determine the maximum lift of the com- pressor.
Page 30: Lead/Lag Control
Lead/Lag, found in the Equipment MACHINE COMMUNICATION WIRING — Refer to the Conﬁguration table of the Service menu. machine’s Installation Instructions, Carrier Comfort Net- If the lag chiller does not achieve start-up before the work Interface section on page 40 for information on ma- PRESTART FAULT TIMER elapses, then the lag chiller shall chine communication wiring.
Page 31: Faulted Chiller Operation
If the lag chiller faults when the lead chiller is also faulted, Standby Chiller Conﬁguration and Operation — The con- the standby chiller reverts to a stand-alone CCN mode of ﬁgured standby chiller is identiﬁed as such by having the operation.
Page 32: Ice Build Initiation
ICE BUILD INITIATION — The Ice Build Time Schedule POINT. If the ICE BUILD RECYCLE OPTION is set to provides the means for activating ice build. The ice build ENABLE, a recycle shutdown occurs and recycle start- time table is named OCCPC02S. up shall be based on LEAVING CHILLED WATER tem- perature being greater than the WATER/BRINE CON- If the Ice Build Time Schedule is OCCUPIED and the ICE...
Page 33: Attaching To Other Ccn Modules
ATTACH softkey to upload the LOCAL device. The PSIO or CCN device can be conﬁgured to be the broadcast device. for the 19EF will now be uploaded. The controller that is conﬁgured to be the broadcaster is the NOTE: The LID will not automatically re-attach to the PSIO device responsible for transmitting holiday, time, and daylight- module on the machine.
Page 34: Start-Up/Shutdown/Recycle
6. Press NEXT to highlight the holiday table that you START-UP/SHUTDOWN/ wish to view or change. Each table is one holiday pe- RECYCLE SEQUENCE (Fig. 22) riod, starting on a speciﬁc date, and lasting up to 99 days. Local Start-Up — Local start-up (or a manual start-up) is initiated by pressing the LOCAL menu softkey which is on the default LID screen.
Page 35: Automatic Soft-Stop Amps Threshold
Automatic Soft Stop Amps Threshold — The SOFT STOP AMPS THRESHOLD closes the guide vanes of the compressor automatically when a non-recycle, non-alarm stop signal occurs before the compressor motor is deenergized. If the STOP button is pressed, the guide vanes close to a preset amperage percent or until the guide vane is less than 2% open.
Page 36: Safety Shutdown
LOCAL softkeys to restart the machine. Soft stop unload- ing does not occur during safety shutdowns. 19EF chillers are shipped with the refrigerant contained in the condenser shell and the oil charge shipped in the com- pressor. The cooler will have a 15 psig (103 kPa) refrigerant charge.
Page 37: Standing Vacuum Test
2. If the pressure readings are abnormal for machine 4. a. If the leakage rate is less than 0.05 in. Hg (.17 kPa) in condition: 24 hours, the machine is sufficiently tight. a. Prepare to leak test machines shipped with refrigerant b.
Page 39 Table 5A — HFC-134a Pressure — Temperature (F) Table 5B — HFC-134a Pressure — Temperature (C) TEMPERATURE (F) PRESSURE (psi) TEMPERATURE (C) PRESSURE (kPa) 6.50 -18.0 44.8 7.52 -16.7 51.9 8.60 -15.6 59.3 9.66 -14.4 66.6 10.79 -13.3 74.4 11.96 -12.2 82.5 13.17...
Page 40: Inspect Water Piping
Divide the 60-second resistance reading by the 19EF relief valves are set to relieve at the 18 psig 10-second reading. The ratio, or polarization index, (124 kPa) machine design pressure.
Page 41: Check Starter
To attach the CCN communication bus wiring, refer to MECHANICAL-TYPE STARTERS the certiﬁed drawings and wiring diagrams. The wire is in- 1. Check all ﬁeld wiring connections for tightness, clear- serted into the CCN communications plug (COMM1) on the ance from moving parts, and correct connection. PSIO module.
Page 42: Oil Charge
Chilled Medium Water or Brine? As conﬁguration of the 19EF unit is performed, write down Brine Refrigerant Trippoint Usually 3° F (1.7° C) below design refrigerant temperature all conﬁguration settings. A log, such as the one shown on...
Page 43 Refrigerant used: HFC-134a SARY — The Equipment Conﬁguration table has tables to Estimated Minimum Load Conditions: select and view or modify. Carrier’s certiﬁed drawings will 44 F (6.7 C) LCW have the conﬁguration values required for the jobsite. Modify 45.5 F (7.5 C) EWC these tables only if requested.
Page 44: High Altitude Locations
360/60 down directions. 380/60 400/60 The 19EF machine will have the refrigerant shipped sepa- 440/60 460/60 rately, and a nitrogen holding charge of 15 psig (103 kPa) in 480/60 the machine.
Page 45: Manual Operation Of The Guide Vanes
The full refrigerant charge on the 19EF will vary with ma- Manual Operation of the Guide Vanes — Manual chine components and design conditions, indicated on the operation of the guide vanes is helpful to establish a steady job data speciﬁcations. An approximate charge may be found motor current for calibration of the motor amps value.
Page 46: Calibrate Motor Current Demand Setting
IF THE MOTOR ROTATION IS NOT CLOCKWISE (as To Prevent Accidental Start-Up — The PIC can be viewed through the sight glass), reverse any 2 of the 3 in- set up so that start-up of the unit is more difficult than just coming power leads to the starter and recheck rotation.
Page 47: Operator Duties
7. Cooler pressure and temperature also will vary with the OPERATING INSTRUCTIONS design conditions. Typical pressure range will be be- Operator Duties tween 60 and 80 psig (410 and 550 kPa), with tempera- ture ranging between 34 and 45 F (1 and 8 C). 1.
Page 48: After Extended Shutdown
PIC data is possible through the use of CCN de- vices such as the Data Collection module and a Building Su- Recharge the machine by transferring refrigerant from the pervisor. Contact your Carrier representative for more storage vessel. Follow the Refrigerant Transfer Procedure sec- information.
Page 50: General Maintenance
The oil charge is approximately 15 gal- lons (57 L) for compressors. The added oil must meet Car- rier speciﬁcations for the 19EF. Refer to Change Oil and Oil Filter and Oil Changes sections. Any additional oil that is HFC-134a should not be mixed with air or oxygen and added should be logged by noting the amount and date.
Page 51: Scheduled Maintenance
The polyolester-based oil may be ordered from your local Carrier representative. Check Safety and Operating Controls Monthly Oil Changes — Carrier recommends changing the oil — To ensure machine protection, the Control Test Auto- and ﬁlter after the ﬁrst year of operation and every three years mated Test should be done at least once per month.
Page 52: Refrigerant Filter
The refrig- signed to avoid scraping and scratching the tube wall. Con- erant ﬂoat system must be inspected every 5 years or when tact your Carrier representative to obtain these brushes. Do machine is opened for service. not use wire brushes.
Page 53: Check Pressure Transducers
The ﬁrst area necessary to ensure the proper refrigerant temperature/ to check when troubleshooting the 19EF is the LID display. pressure relationship. Each transducer is supplied with If the alarm light is ﬂashing, check the primary and second- 5 vdc power from a power supply.
Page 54: Control Test
Calibration can be checked by comparing the pressure read- ings from the transducer against an accurate refrigeration gage. These readings are all viewed or calibrated from the Sta- Make sure to use a backup wrench on the Schrader ﬁt- tus01 table on the LID. The transducer can be checked and ting whenever removing any transducer.
Page 55 Table 9 — LID Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides A. SHUTDOWN WITH ON/OFF/RESET-OFF PRIMARY MESSAGE SECONDARY MESSAGE PROBABLE CAUSE/REMEDY PIC in OFF mode, press the CCN or local softkey to MANUALLY STOPPED — PRESS CCN OR LOCAL TO START start unit.
Page 56 Table 9 — LID Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) E. NORMAL OR AUTO.-RESTART PRIMARY MESSAGE SECONDARY MESSAGE PROBABLE CAUSE/REMEDY STARTUP IN PROGRESS OCCUPIED MODE Machine starting. Time schedule is occupied. STARTUP IN PROGRESS REMOTE CONTACT CLOSED Machine starting.
Page 57 Table 9 — LID Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) H. NORMAL RUN WITH RESET, TEMPERATURE, OR DEMAND PRIMARY MESSAGE SECONDARY MESSAGE PROBABLE CAUSE/REMEDY RUNNING — RESET ACTIVE 4-20MA SIGNAL RUNNING — RESET ACTIVE REMOTE SENSOR CONTROL Reset program active based upon Conﬁg table setup.
Page 58 Table 9 — LID Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) K. MACHINE PROTECT LIMIT FAULTS Excessive numbers of the same fault can lead to severe machine damage. Contact your service contractor. PRIMARY MESSAGE SECONDARY MESSAGE ALARM MESSAGE/PRIMARY CAUSE ADDITIONAL CAUSE/REMEDY PROTECTIVE LIMIT...
Page 59 Table 9 — LID Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) L. MACHINE ALERTS PRIMARY MESSAGE SECONDARY MESSAGE ALARM MESSAGE/PRIMARY CAUSE ADDITIONAL CAUSE/REMEDY RECYCLE ALERT HIGH AMPS AT SHUTDOWN High Amps at Recycle: Check guide vane Check that guide vanes are closing.
Page 60 Table 9 — LID Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont) N. OTHER PROBLEMS/MALFUNCTIONS DESCRIPTION/MALFUNCTION PROBABLE CAUSE/REMEDY Chilled Water/Brine Temperature Chilled water set point set too high. Access set point on LID and verify. Too High (Machine Running) Capacity override or excessive cooling load (machine at design capacity).
Page 61 Table 10A — Thermistor Temperature (F) vs Resistance/Voltage Drop TEMPERATURE VOLTAGE RESISTANCE TEMPERATURE VOLTAGE RESISTANCE TEMPERATURE VOLTAGE RESISTANCE DROP (V) (OHMS) DROP (V) (OHMS) DROP (V) (OHMS) −25.0 4.821 98,010 3.093 5,781 0.838 −24.0 4.818 94,707 3.064 5,637 0.824 −23.0 4.814 91,522 3.034...
Page 62 Table 10B — Thermistor Temperature (C) vs Resistance/Voltage Drop TEMPERATURE VOLTAGE RESISTANCE TEMPERATURE VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) −40 4.896 168 230 1.898 2 184 −39 4.889 157 440 1.852 2 101 −38 4.882 147 410 1.807 2 021 −37 4.874...
Page 63: Control Modules
If all modules indicate communications failure, check com- Control Modules munications plug on the PSIO module for proper seating. Also check the wiring terminations (Level II — 1:red, 2:wht, 3:blk; Sensor bus — 1:red, 2:blk, 3:clr/wht) and Turn controller power off before servicing controls. This the plug is connected to the proper socket.
Page 64 Processor Module (PSIO) (Fig. 32) Starter Management Module (SMM) (Fig. 33) INPUTS — Each input channel has 3 terminals; only 2 of INPUTS — Inputs on strips J2 and J3 are a mix of analog the terminals are used. Application of machine determines and discrete (on/off) inputs.
Page 65: Replacing Defective Processor Modules
The 11. Change the address of the PSIO in the Conﬁg table of proper software is factory-installed by Carrier in the replace- the Equipment Conﬁguration table back to the previous ment module.
Page 66: Physical Data
clearances, physical and electrical data and wiring schemat- Physical Data — Tables 11-15 and Fig. 35-37 pro- ics for operator convenience during troubleshooting. vide additional information regarding compressor ﬁts and Table 11 — Heat Exchanger Data* RIGGING WEIGHTS MACHINE CHARGE HEAT NUMBER VESSEL...
Page 67 VIEW B (Refer to Table 14 for dimensions) VIEW A DIM. SEE VIEW A SEE VIEW B 17, 18 Fig. 35 — Compressor Fits and Clearances...
Page 68 Table 14 — Compressor Fits and Clearances CLEARANCE† TYPE OF ITEM* DESCRIPTION MEASURE Minimum Maximum Minimum Maximum 1st Stage Impeller to Diaphagm Axial See Table 15 2nd Stage Impeller to Discharge Wall Axial 1st Stage Labyrinth .0160 .0200 .4060 .5080 Diametral Interstage Labyrinth .0120...
Page 69 Fig. 36 — Electronic PIC Controls Wiring Schematic...
Page 70 Fig. 36 — Electronic PIC Controls Wiring Schematic (cont)
Page 72 Options Module, 64 Calibrate Motor Current Demand Setting, 46 Overview (Troubleshooting Guide), 53 Capacity Override, 26 Physical Data, 66 Carrier Comfort Network Interface, 40 PIC System Components, 8 Charge Refrigerant into Machine, 44 PIC Systems Functions, 24 Check Starter, 41...

Carrier 19EF Series Start Up & Operation Manual

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SAFETY CONSIDERATIONS

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Summary of Contents for Carrier 19EF Series

Table of Contents