Sequence Of Operations; Overview - Halton M.A.R.V.E.L. Operator's Manual

M.A.R.V.E.L. Sequence of Operations

Overview

A sequence of operations is a series of steps required to perform a given task. The DCV system uses
the following sequence of operations to control the exhaust hood operation.

Sequence of Operations

Startup & Shutdown
Operation Step
•
Startup
•
•
Shutdown •
•
Idle Mode •
•
•
•
Active Mode •
•
•
NOTE: If during this time more cooking activities are detected, the cooking
timer will be restarted.
Override Mode •
•
M.A.R.V.E.L. Installation Operation & Maintenance Manual
Turns exhaust system on.
Can be started by:
• 24/7 pre-programmed schedule.
• The building management system or via an internet connection remotely.
• Using a locally mounted on/off switch.
• Reaching a pre-determined IR Index or duct temperature level.
• Pressing the override button.
After startup, enters Idle mode.
Turns system off.
Can be shutdown by any of the parameters listed in the Startup step (above)
except the override button.
System starts up in Idle mode (after startup).
Pending until signs of cooking activity sensed from IRIS™ sensor(s).
Minimal exhaust fl ow captures any appliance-generated heat. Default is 60%
of design air fl ow or as adjusted to meet requirements.
After idle mode, enters Active mode.
System moves into Active mode when an IRIS™ sensor detects cooking
activities under the hood.
Exhaust fan speed increased to design air fl ow and balancing dampers (if
present) adjusts the airfl ow in the hood to design level to assure suffi cient
capture and containment.
Air fl ow in the hood is maintained for a predetermined cooking time before
returning to the Idle mode.
Used to override pre programmed operation.
Two modes:
1. Press and hold for 1 second to accelerate the exhaust rate to 100% of the
design air fl ow for a pre programmed period of time (default 5 minutes).
2. Press and hold for 3 seconds to accelerate the exhaust rate to 100% of
the design air fl ow for a pre programmed period of time (default 1 hour.)
Starts the hood if it has been overridden by a schedule or an 'off' state.
Details
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