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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.
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
accordance with the latest edition of ANSI/ASHRAE 15
(American National Standards Institute/American Society of Heat-
ing, Refrigeration, and Air Conditioning Engineers). The accumu-
lation of refrigerant 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
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 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. Refrigerantin contactwith
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 NOTWORK ON electrical components, including control pan-
els, switches, starters, or oil heater until you are sureALL POWER
IS OFF and no residual voltage can leak from capacitors or solid-
state components.
LOCK OPENANDTAGelectrical circuitsduring 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 NOTATTEMPTTO REMOVEfittings, covers, etc., whilechiller
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 compressedspring.
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
disconnect 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 NOTVENTOR DRAIN waterboxes containingindustrial 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.
19XL
Hermetic Centrifugal Liquid Chillers
50/60 Hz
With HCFC-22 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. 531-971 Printed in U.S.A. Form 19XL-4SS Pg 1 7-96 Replaces: 19XL-3SS