2
M
INI
-S
PACE
EC I
NSTALLATION
, O
PERATION
AND
M
AINTENANCE
M
ANUAL
•
When working on electrical equipment, remove
all jewelry, watches, rings, etc.
•
Always disconnect the main power supply to
the equipment at the main power disconnect
switch before beginning work on the equipment.
A lock-out/tag-out procedure should be fol-
lowed to ensure that power is not inadvertently
reconnected.
• Never
work on electrical equipment unless an-
other person who is familiar with the operation
and hazards of the equipment and competent
to administer fi rst aid is nearby.
•
All personnel working on or near equipment
should be familiar with the hazards associated
with electrical maintenance. Safety placards/
stickers have been placed on the unit to call
attention to personal and equipment damage
hazards.
•
Certain maintenance or cleaning procedures
may call for the use and handling of chemicals,
solvents, or cleansers. Always refer to the manu-
facturer’s Safety Data Sheet (SDS) prior to using
these materials. Clean parts in a well-ventilated
area. Avoid inhalation of solvent fumes and
prolonged exposure of skin to cleaning solvents.
Wash exposed skin thoroughly after contact
with solvents.
WARNING
This equipment should be serviced and repaired
only by a journeyman refrigeration mechanic or air
conditioning technician.
WARNING
This unit employs high voltage equipment with
rotating components. Exercise extreme care to
avoid accidents.
WARNING
Hazardous voltage will still be present inside the
electric box at the motor start protectors and
circuit breakers when the unit is turned off at the
microprocessor controller. To isolate the unit for
maintenance, turn off power at the main power
disconnect switch. Always disconnect main power
prior to performing any service or repairs.
WARNING
Refrigerant (R410A) is used with this equipment.
Death or serious injury may result if personnel fail
to observe proper safety precautions. Great care
must be exercised to prevent contact of liquid
refrigerant or refrigerant gas, discharged under
pressure, with any part of the body. The extremely
low temperature resulting from the rapid expansion
of liquid refrigerant or pressurized gas can cause
sudden and irreversible tissue damage.
As a minimum, all personnel should wear thermal
protective gloves and face-shield/goggles when
working with refrigerant. Application of excessive
heat to any component will cause extreme pressure
and may result in a rupture.
Exposure of R410A refrigerant to an open fl ame or a
very hot surface can cause a chemical reaction that
forms fl uorophosgene (carbonyl fl uoride), a highly
poisonous and corrosive gas.
In its natural state, refrigerant is a colorless, odorless
vapor with no toxic characteristics. It is heavier than
air and will disperse rapidly in a well-ventilated area.
In an unventilated area, it presents a danger as a
suffocant.
WARNING
When performing soldering or de-soldering
operations, make certain the refrigeration system is
fully recovered and purged and dry nitrogen is fl owing
through the system at the rate of not less than 1
–
2
CFM (0.03-0.06M³/minute).
CAUTION
When the air conditioner is in the cooling mode, the
return air-intake and discharge (supply) openings
must be free of obstructions. Ensure access panels/
doors are secure and latched into position.
CAUTION
Do not use cleaning solvents near open fl ame or
excessive heat. Wear eye protection when blowing
solvent from parts. The pressure-wash should
not exceed 30 psig. Solvent solutions should be
disposed of in accordance with local and state
regulatory statutes.
CAUTION
The unit must be kept in its normal installed
position when moving. If the unit is not kept level
and vertical, damage to the compressor will result.
