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Installation, Operating, and Maintenance
Instructions
For Use With Positive Pressure Chillers
SAFETY CONSIDERATIONS
Positive pressure storage systems are designed to pro-
vide safe and reliable service when operated within de-
sign 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 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
accumulation of refrigerant in an enclosed space can displace oxy-
gen 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 irregulari-
ties, 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 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 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.
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 OPENANDTAG electrical circuits during servicing. IF WORK
IS INTERRUPTED, confirm that all circuits are deenergized be-
fore resuming work.
DO NOT syphon 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 transferring refrig-
erant 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 NOTATTEMPT 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 cause personal injury and damage to the machine.
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 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 cor-
rosion, rust, leaks, or damage.
DO NOT MIX REFRIGERANTfrom chillers that use different com-
pressor oils. Compressor damage can result.
19XB
Positive Pressure Storage System
50/60 Hz
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. 531-927 Printed in U.S.A. Form 19XB-1SI Pg 1 6-96 Replaces: New