Halton M.A.R.V.E.L. Operator's Manual page 10

Operation Step
Fire Mode •
•
Off Mode •
Airfl ow Reporting •
and Replacement
Air Control
Alarm and Fault •
Conditions
•
M.A.R.V.E.L. Installation Operation & Maintenance Manual
If a fi re signal is detected in the kitchen, the system triggers a fi re alarm and
stops the make-up air fan.
The exhaust fan will either stop or continue running depending on the local
fi re code requirements.
Exhaust and make-up air fans stop when no appliances are operating (e.g.,
turned off and cooled down).
System continuously monitors exhaust airfl ow at each hood and generates
a signal 0 to 10 V proportional to total exhaust airfl ow as fraction of total
design. 0 V - system is off; 7 V - system operates at 70% of design airfl ow,
etc. This signal is used to control Replacement air to maintain building
pressurization.
System constantly monitors various parameters.
If any unusual or abnormal condition is detected, an alarm is activated.
An alarm indicator can include:
• A local alarm light and buzzer on a control panel.
• Email or text message sent to a computer or a mobile device, pager,
visual display on a computer screen or through a SCADA interface.
Details
10