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WARNING
Failure to follow these procedures may result in personal
injury or death.
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles
and proceed as follows:
Shut off electrical power to unit.
Recover refrigerant to relieve all pressure from system using
both high-pressure and low pressure ports.
Traces of vapor should be displaced with nitrogen and the
work area should be well ventilated. Refrigerant in contact
with an open flame produces toxic gases.
Cut component connection tubing with tubing cutter and
remove component from unit. Use a pan to catch any oil that
may come out of the lines and as a gage for how much oil to
add to the system.
Carefully unsweat remaining tubing stubs when necessary. Oil
can ignite when exposed to torch flame.
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 panels, 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.
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,
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 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 damage 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 valves, 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.
Failure to follow these procedures may result in personal inju-
ry or damage to equipment.
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 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
components are light, use mechanical equipment when there is
a risk of slipping 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 re-
quirements 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.
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.
PROVIDE A DRAIN connection in the vent line near each
pressure relief device to prevent a build-up of condensate or
rain water.
DO NOT re-use compressor oil or any oil that has been ex-
posed to the atmosphere. Dispose of oil per local codes and
regulations.
DO NOT leave refrigerant system open to air any longer than
the actual time required to service the equipment. Seal circuits
being serviced and charge with dry nitrogen to prevent oil con-
tamination when timely repairs cannot be completed.
3
WARNING
CAUTION
CAUTION
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