Carrier 19QA - Manual

19QA
Refrigerant Management System
50/60 Hz
Installation, Operating and Maintenance
Instructions
For Use With Low-Pressure Centrifugal Liquid Chillers
SAFETY CONSIDERATIONS
Refrigerant recovery devices are designed to provide safe
and reliable service when operated within design spec­
ifications. 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 this guide.
A DANGER
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 (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 ir­
regularities, unconsciousness, or death. Misuse can be fatal. Va­
por is heavier than air and reduces the amount of oxygen available
for breathing. Product causes eye and skin irritation. Decomposi­
tion products are hazardous.
DO NOT USE OXYGEN to purge lines or to pressurize a ma­
chine for any purpose. Oxygen gas reacts violently with oil, grease,
and other common substances.
NEVER EXCEED specified test pressures, VERIFY the allow­
able test pressure by checking the instruction literature and the de­
sign pressures on the equipment nameplate.
DO NOT USE air for leak testing. Use only tracer gases and 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.
A WARNING
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 qual­
ified 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 de­
energized before resuming work.
DO NOT siphon refrigerant by mouth.
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 cyl­
inder. 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 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
machine is under pressure 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 re­
lief 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.
A CAUTION
DO NOT STEP on refrigerant lines. Broken lines can whip about
and cause personal injury.
DO NOT climb over a machine. Use platform, catwalk, or stag­
ing. 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 such equipment when there is a risk of slip­
ping or losing your balance.
BE AWARE that certain automatic start arrangements CAN EN­
GAGE 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 require­
ments of the original equipment.
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
corrosion, rust, leaks, or damage.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book|2 |2 PC 221 Catalog No 531-963 Printed in U S A Form 19QA-2SI Pg 1 9-94 Replaces: 19QA-1 SI
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