Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual page 3

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 gog-
gles and proceed as follows:
1. Shut off electrical power to unit.
2. Recover refrigerant to relieve all pressure from system
using both high-pressure and low pressure ports.
3. 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.
4. 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.
5. Carefully unsweat remaining tubing stubs when neces-
sary. Oil can ignite when exposed to torch flame.
DO NOT USE eyebolts or eyebolt holes to rig chiller sec-
tions 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 servic-
ing. IF WORK IS INTERRUPTED, confirm that all cir-
cuits 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 en-
ters the eyes, IMMEDIATELY FLUSH EYES with water
and consult a physician.
NEVER APPLY an open flame or live steam to a refriger-
ant 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 ILLE-
GAL. 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 re-
frigerant to the chiller. The introduction of the wrong re-
frigerant 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 re-
frigerant 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 de-
vices at more frequent intervals.
DO NOT ATTEMPT TO REPAIR OR RECONDITION
any relief device when corrosion or build-up of foreign ma-
terial (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 com-
pressed 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
injury 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
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 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 indus-
trial brines, liquid, gases, or semisolids without the permis-
sion of your process control group.
DO NOT LOOSEN waterbox cover bolts until the water-
box 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 pre-
vent oil contamination when timely repairs cannot be
completed.
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WARNING
CAUTION
CAUTION