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Pressure Systems
The unit contains refrigerant vapor and liquid under
pressure, release of which can be a danger and cause
injury. The user should ensure that care is taken during
installation, operation and maintenance to avoid dam-
age to the pressure system. No attempt should be made
to gain access to the component parts of the pressure
system other than by suitably trained and qualified
personnel.
Electrical
The unit must be grounded. No installation or mainte-
nance work must be attempted on the electrical equip-
ment without first switching power OFF, isolating and
locking-off the power supply. Servicing and mainte-
nance on live equipment must not be attempted. No
attempt should be made to gain access to the control
panel or electrical enclosures during normal operation
of the unit.
Rotating Parts
Fan guards must be fitted at all times and not removed
unless the power supply has been isolated. If ductwork is
to be fitted, requiring the wire fan guards to be removed,
alternative safety measures must be taken to protect
against the risk of injury from rotating fans.
Sharp Edges
The fins on the air-cooled condenser coils have sharp
metal edges. Reasonable care should be taken when
working in contact with the coils to avoid the risk of
minor abrasions and lacerations. The use of gloves is
recommended.
Frame rails, brakes, and other components may also
have sharp edges. Reasonable care should be taken when
working in contact with any components to avoid risk
of minor abrasions and lacerations.
JOHNSON CONTROLS
Refrigerants and Oils
Refrigerants and oils used in the unit are generally non-
toxic, non-flammable and non-corrosive, and pose no
special safety hazards. Use of gloves and safety glasses
is, however, recommended when working on the unit.
The build up of refrigerant vapor, from a leak for ex-
ample, does pose a risk of asphyxiation in confined or
enclosed spaces and attention should be given to good
ventilation.
Use only the refrigerant specifically designated for the
unit. Any other type of refrigerant may cause damage
to the equipment and will void the warranty.
High Temperature and Pressure Cleaning
High temperature and pressure cleaning methods (e.g.
steam cleaning) should not be used on any part of the
pressure system as this may cause operation of the pres-
sure relief device(s). Detergents and solvents, which may
cause corrosion, should also be avoided.
Emergency Shutdown
In case of emergency, the control panel is fitted with
a Unit Switch to stop the unit in an emergency. When
operated, it removes the low voltage 120 VAC electri-
cal supply from the inverter system, thus shutting down
the unit.
Generator Operation
The variable speed drive can operate on a generator,
provided that the generator's output voltage can be main-
tained within the voltage specifications for the drive.
When switching from utility power to generator power,
a minimum of a 10 second delay must be provided. This
same delay is required when switching power back from
generator power to utility power, unless a synchronized
transfer system is used.
FORM 201.21-NM1 (1223)
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