Carrier 17DA Start-Up, Operation And Maintenance Instructions Manual

Carrier 17DA Start-Up, Operation And Maintenance Instructions Manual

Open-drive centrifugal liquid chillers 50/60 hz
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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 specifica-
tions. When operating this equipment, use good judgment
and safety precautions to avoid damage to equipment 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.
DANGER
DO NOT VENT refrigerant relief valves within a building. Outlet
from rupture disc or relief valve must be vented outdoors in accor-
dance with the latest edition of ANSI/ASHRAE 15 (American
National Standards Institute/American Society of Heating, Refrigera-
tion, and Air Conditioning Engineers). The accumulation of refriger-
ant 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 irregular-
ities, 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 pres-
sures 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.
RISK OF INJURY OR DEATH by electrocution. High voltage is
present on motor leads even though the motor is not running when a
solid-state or inside-delta mechanical starter is used. Open the power
supply disconnect before touching motor leads or terminal
WARNING
D
O 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 qualified
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
before resuming work.
AVOID SPILLING liquid refrigerant on skin or getting it into the
eyes. USE SAFETY GOGGLES. Wash any spills from the skin with
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53170002-01
Open-Drive Centrifugal Liquid Chillers

SAFETY CONSIDERATIONS

s.
Printed in U.S.A.
Form 17DA-3SS
soap and water. If liquid refrigerant enters the eyes, IMMEDIATELY
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 edition).
Contact Carrier for further information on use of this chiller with other
refrigerants.
DO NOT ATTEMPT 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.
CAUTION
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. Fol-
low safe practices when using ladders.
USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to lift or
move inspection covers or other heavy components. Even if compo-
nents are light, use mechanical equipment when there is a risk of slip-
ping or losing your balance.
BE AWARE that certain automatic start arrangements CAN
ENGAGE THE STARTER, TOWER FAN, OR PUMPS. Open the
disconnect ahead of the starter, tower fans, or pumps.
USE only repair or replacement parts that meet the code requirements
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 corro-
sion, rust, leaks, or damage.
PROVIDE A DRAIN connection in the vent line near each pressure
relief device to prevent a build-up of condensate or
Pg 1
17DA
50/60 Hz
HFC-134a
rain water.
3-09
Replaces: 17DA-2SS,
17DA-3SO

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Summary of Contents for Carrier 17DA

  • Page 1: Safety Considerations

    ANSI/ASHRAE 15 (latest edition). tion, and Air Conditioning Engineers). The accumulation of refriger- Contact Carrier for further information on use of this chiller with other ant in an enclosed space can displace oxygen and cause asphyxiation.
  • Page 2: Table Of Contents

    Page CONTENTS • CHECK PURGE FREQUENCY Page • WATER IN PURGE WATER CHAMBER SAFETY CONSIDERATIONS ..... . 1 Yearly Maintenance......13 INTRODUCTION .
  • Page 3: Introduction

    Refer to job wiring diagrams. All wiring must The following field-supplied Wiring — Field-Supplied Tools — agree with these drawings. tools are need for installation and start up of the 17DA chiller: AUXILIARY EQUIPMENT WIRING — Check • General mechanics tools following: •...
  • Page 4: Motor Drive

    The final opera- chiller safeties nor energize any chiller component directly. The tion of the 17DA installation is to leak test the machine and de- starter or VFD, in particular, must be protected from being ener- hydrate it to the point where it maintains a pressure of 0.21 psia...
  • Page 5: Charge Machine With Water

    SATURATED CONDITIONS each manufacturer and have property differences that may or (R-134a) PUMPOUT may not make them suitable for operation in the 17DA chiller. SYSTEM Maximum Pressure Carrier supplied oil has been laboratory tested by Carrier and...
  • Page 6: Operate Drive

    For general instructions on how to handle refrigerant 12. Stop the compressor. During coast down again verify that refer to Carrier Standard Service Techniques, Form SM-1. Use the compressor is rotating in the correct direction which is the Charging by Weight method, cross checking with the ma- counterclockwise if it is seen from the drive.
  • Page 7: Hot Alignment Check And Doweling

    3. Procedures to switch from bypass to VFD operation (if made. bypass equipped) Table 3A — Typical 17DA Cooler and Condenser Charges (R-134a) (lb) COOLER CONDENSER 15-FT TUBES 18-FT TUBES...
  • Page 8: Steam Turbine

    Table 3B — Typical 17DA Cooler and Condenser Charges (R-134a) (Kg) COOLER CONDENSER 4.6 M TUBES 5.5 M TUBES 6.7 M TUBES 4.6 M TUBES 5.5 M TUBES 6.7 M TUBES SIZE SIZE 1362.0 1634.4 1997.6 908.0 1089.6 1316.6 1634.4 1952.2...
  • Page 10: Operation

    65 F (18 C) minimum. Throttle con- This important data helps service engineers determine denser water flow or cycle cooling tower fans to suit. kind and frequency of service required. See your Carrier Service Representative for refrigeration log forms (see Stop Machine Fig.
  • Page 11: Pumpout System Operation

    The 5F20 open-drive is charged with 5 pints cooler lines to remove all traces of water. Leave water plus 1 pint for the oil separator. Use Carrier oil part no. box drains open until time to refill.
  • Page 12: Remove Air After Opening Chiller To

    4. Start the pumpout compressor (control switch at ON 3. Operate the cooler water pump. position). 4. Open valves 3, 6, 7, and 9. 5. Operate pumpout compressor until suction gage reads 5. Close valves 2, 4, 5, 10 ,11, and 13. highest sustained vacuum (about 28 in.
  • Page 13: Charge Refrigerant

    2. Open valves 1, 2, 5, 6, 7, and 12. chiller main control panel. Customer specifications may require some or all of the sensors and safeties to be duplicated 3. Close valves 3, 4, 8, 9, 10 ,11, and 13. by mechanical switches.
  • Page 14: Check Seal Oil Differential Pressure

    Contact a Carrier service representative immediately. ed. Increasing cushion air pressure slows the vane opening CHECK COOLER AND CONDENSER MINIMUM speed and increases the vane closing speed.
  • Page 15: Check Starters And Vfds

    The oil filters should be changed at a minimum of one year Refrigerant loss is always due to leaks, since the 17DA ma- intervals. The oil charge is 35 gallons. Carrier supplies suitable chine operates at pressures above atmospheric. Check over the oil under part number PP23BZ106.
  • Page 16: Breaking Vacuum

    3/4-IN. INSULATION PURGE SYSTEM VALVE ASSEMBLY LEGEND 1 — Purge Connection 2 — Shutoff Valves 3 — Strainer 4 — Orifice EVACUATOR ASSEMBLY 5 — Condensing Chamber 6 — Condensing Chamber Pressure Gage 7 — Non-Condensable Vent Valve a17-577 8 — Cooling Coil 9 —...
  • Page 17: Removing Refrigerant

    DA - Single-stage 81 - Compressor size The overall assembly as well as each major component has a serial number. When corresponding with your Carrier repre- sentative, always give machine designation, machine serial number, and component serial numbers. Refrigerant is relatively Refrigerant Properties —...
  • Page 18: Refrigeration Cycle

    • Controls - Instruments which control the brine temperature, Since the coldest condenser water flows through the sub- protect the various elements of the machine, and automati- cooler tubes, the temperature of the refrigerant is reduced as cally start and stop the compressor. When specified, addi- much as possible before it enters the cooler.
  • Page 19: Purge Cycle

    LEGEND 1 — Seal Oil Supply Pressure Transmitter 10 — Auxiliary Oil Pump a17-576 2 — Back-of-Seal Oil Pressure Transmitter 11 — Oil Resevoir 3 — Bearing Oil Supply Pressure Transmitter 12 — Seal Oil Return Float Valve 4 — Low Pressure Regulator 13 —...
  • Page 20: Troubleshooting

    OF PLACE — Fix gasket. compressors based on design and duty. The 17DA chiller is able to handle deep load reductions without a major drop in LEAVING CHILLED WATER SENSOR DEFECTIVE —...
  • Page 21 Table 6A — HFC-134a Pressure — Table 6B — HFC-134a Pressure — Temperature (F) Temperature (C) TEMPERATURE, PRESSURE TEMPERATURE, PRESSURE (psig) (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 –11.1 90.8...
  • Page 22: Chilled Water Temperature Too Low With Compressor Running

    temperature at the subcooler inlet thermowell. This is located Chilled Water Temperature Too Low with adjacent to the level control/transmitter. Compressor Running If air is suspected, then check the purge. See the Purge Cy- CHILLED WATER SET POINT IN THE PLC SET TOO cle section on page 19.
  • Page 23: Operating Controls

    use the same sensors as the operating functions. Per customer positioner. A solenoid valve in the instrument line prevents the specifications, these may be supplemented by mechanical actuator from opening the guide vanes until the start-up se- switches which directly measure pressures or temperatures. quence is complete.
  • Page 24 a17-579...
  • Page 26 FRONT VIEW REAR VIEW Fig. 12 — Machine Configuration...
  • Page 27: Controls

    COMPRESSOR REAR VIEW COMPRESSOR FRONT VIEW LEGEND 1 — Free Cooling Vapor Valve (optional) 25 — Thrust Bearing Temperature Instrument 2 — Sub-Cooler Refrigerant Level Controller 26 — Oil Filter 3 — Cooler Sight Glass 27 — Oil Cooler 4 — Hot Gas Bypass Valve (optional) 28 —...
  • Page 28 Copyright 2009 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53170002-01 Printed in U.S.A. Form 17DA-3SS Pg 28 3-09 Replaces: 17DA-2SS, 17DA-3SO...
  • Page 32: Pre-Start Up Check List

    Has the condenser hot well level control been checked for correct operation? ______ Signed By: ____________________________________ Date: ____________ Firm Name: ______________________________________________________ Copyright 2009 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53170002-01 Printed in U.S.A.

This manual is also suitable for:

Hfc-134a

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