Carrier 17/19EX Benutzerhandbuch

17/19EX

50/60 Hz

Centrifugal Liquid Chillers

with HFC-134a

Start-Up, Operation, and Maintenance Instructions

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

without incurring obligations.

PC 211 Catalog No. 531-715 9-95 Form 17/19EX-1SS Replaces: 19EX-1SS

Safety Considerations

Centrifugal liquid chillers are designed to provide safe and reliable service when

operated within design specifications. When operating this equipment, use good

judgement 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 machine 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 accordance with the latest edition of

ASHRAE 15 (Safety Code for Mechanical Refrigeration). The accumulation of

refrigerant in an enclosed space can displace oxygen and cause asphyxiation.

PROVIDE adequate ventilation in accordance with ASHRAE 15, especially for

enclosed and low overhead spaces. Inhalation of high concentrations of vapor is

harmful and may cause heart irregularities, unconsciousness, or death. Misuse

can be fatal. Vapor is heavier than air and reduces the amount of oxygen avail-

able for breathing. Product causes eye and skin irritation. Decomposition prod-

ucts 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.

DANGER !DANGER

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 dis-

placed withdry air or nitrogen and the work area should be well ventilated.

Refrig-

erant 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 qualified electrician.

DO NOT WORK ON electrical components, including control panels, switches,

starters, or oil heater until you are sure ALL POWER IS OFF and no residual volt-

age can leak from capacitors or solid-state components.

LOCK OPEN AND TAG electrical circuits during servicing. IF WORK IS INTER-

RUPTED, 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 soap and water. If any 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

overpressure can result. When 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

WARNING !WARNING

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 equipmentwith refrigerantsother than those cited herein should

comply with ASHRAE-15 (latest edition). Contact Carrier for further information

on use of this machine with other refrigerants.

DO NOTATTEMPT TO REMOVE fittings, covers, etc., while machine is under pres-

sure or while machine 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 machine operates in a corrosive atmosphere, inspect the

devices at more frequent intervals.

DO NOT ATTEMPT TO REPAIR OR RECONDITION any relief device when corro-

sion 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.

WARNING !WARNING

CAUTION CAUTION

DO NOT STEP on refrigerant lines. Broken lines can whip about and cause per-

sonal 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 cov-

ers or other heavy components. Even if components are light, use such equip-

ment when there is a risk of slipping or losing your balance.

BE AWARE that certain automatic start arrangements CAN ENGAGE THE

STARTER. Open the disconnect

ahead of

the starter in addition to shutting off

the machine or pump.

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 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 nuthas a positive

thread engagement.

CAUTION CAUTION

PERIODICALLY INSPECT all valves, fittings, and piping for corrosion, 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 rain water.

Contents

List of Tables

List of Figures

Safety Considerations

Introduction

Abbreviations

17/19EX Machine Familiarization

Machine Identification Label

System Components

Cooler

Condenser

Motor-Compressor

Control Center

Motor Starter

Utility Vessel

Contents

Refrigeration Cycle

Motor/Oil Refrigeration Cooling Cycle

Hermetic Machines (19 Series) Lubrication Cycle

Summary

Details

Open-Drive Machines (17 Series) Lubrication Cycle

Summary

Details

Starters

Controls

Definitions

Analog Signal

Digital Signal

Volatile Memory

Contents

General

PIC System Components

Processor Module (PSIO)

Starter Management Module (SMM)

Local Interface Device (LID)

6-Pack Relay Board

8-Input Modules

Oil Heater Contactor (1C)

Oil Pump Contactor (2C)

Hot Gas Bypass Contactor Relay (3C) (Optional)

Control Transformers (T1-T4)

Control and Oil Heater Voltage Selector (S1)

Oil Differential Pressure/Power Supply Module

Contents

LID Operation and Menus

General

Alarms and Alerts

LID Default Screen Menu Items

Menu Structure

To View or Change Point Status

Override Operations

To View or Change Time Schedule Operation

To View and Change Set Points

Service Operation

PIC System Functions

Capacity Control

Entering Chilled Water Control

Deadband

Proportional Bands and Gain

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