Exhaust Alert Operating & Fitting Instructions
2
HMI 201/01
Section 1
Introduction
1.1
About these instructions
Information boxes alongside sections will draw attention to SAFETY
CONSIDERATIONS of the text in accordance with the conventions of the
Recreational Craft Directive.
•
DANGER:
Indicates a hazard that could EASILY result in death or serious
injury if proper precautions are not taken. If you have any doubts about what
precautions to take, you should seek expert advice.
•
WARNING:
Indicates a hazard that could result in serious injury or damage to
your boat or its equipment if proper precautions are not taken. If you have
any doubts about what precautions to take, you should seek expert advice.
•
CAUTION:
Indicates a hazard that could result in personal injury or damage
to your boat or its equipment if suitable care is not taken.
•
NOTE:
Contains additional information that may be of help.
1.2
System Description
The Halyard Exhaust Alert system provides a class leading exhaust overheat
alert system housed in a 52mm diameter, waterproof (IP67 rated) gauge.
The system incorporates self-test functionality and is supplied as a dual
voltage (12V or 24V) unit.
•
The Exhaust Alert monitors the exhaust temperature of inboard marine
engines with a ‘wet’
exhaust, i.e. those engines in which cooling water from
outside (also referred to as raw water) is injected into the exhaust system
immediately after the engine exhaust outlet. The cooling water reduces the
temperature of the exhaust system and reduces exhaust noise.
•
Should the cooling water flow
be blocked or substantially reduced, the boat’s
exhaust system can overheat and suffer significant thermal damage.
•
Raw water is also used to cool the engine. A rapid rise in exhaust
temperature often signals a problem in the raw water cooling system.
Common causes are a blocked skin fitting, blocked inlet strainer, or failed
raw water pump.
•
By monitoring the exhaust temperature directly, Exhaust Alert gives early
audible and visual indication of potential raw water cooling problems and
offers protection against exhaust system overheat and possible thermal
damage.
1.3
Exhaust Alert Operation
On power-up the Exhaust Alert unit will cycle through a self-test, lighting
each warning light in turn and sounding the buzzer and siren if fitted.
On detecting a fault on an active engine, the system will display a visual
flashing warning LED and sound an alert with the internal buzzer and the
optional siren if fitted. If the fault is rectified within 15 seconds the system
will automatically reset. After this time the system will latch on and needs
to be acknowledged before it is reset. Touching the units face will
acknowledge an alert and silences the buzzer and siren. When an alert is
acknowledged, the warning LED changes to be constantly lit, and will remain
lit until the fault is rectified.
WARNING:
The Exhaust Alert
should only be fitted to
water cooled exhausts.
WARNING:
DANGER:
CAUTION:
NOTE:
