MELINK INTELLI-HOOD 2 NEW CONSTRUCTION SPECIFICATION
GENERAL
The Melink Intelli-Hood® Operator shall automatically control the speed of the exhaust (and make-up if applicable) fan to
ensure optimal hood performance. The system includes the following components: I/O Processor, Keypad, Temperature
Sensors, Optic Sensors, Variable Frequency Drives (VFDs which replace magnetic starters for 3-phase motors), and Cables.
This pre-engineered system shall be integrated by the hood manufacturer for new construction. The I/O Processor, Keypad,
and Electronic Motor Starters shall be mounted in the utility cabinet, the Temperature Sensors shall be mounted in the
exhaust collar, and the Optic Sensors shall be mounted inside the ends of the hood with air purge units (APU) mounted on
top.
This pre-engineered system shall be installed by a qualified/certified contractor. The I/O Processor shall be mounted above
the hood closest to the Keypad, the Keypad shall be mounted next to the existing hood switch, the Temperature Sensors shall
be mounted in each exhaust collar, the Optic Sensors shall be mounted inside the ends of each Type 1 hood with air purge
units (APU) mounted on top, and the VFDs shall replace the existing magnetic starters for each fan.
The following specified system shall be provided by Melink Corporation based in Cincinnati, OH. No substitutions allowed.
SYSTEM
A. I/O Processor (120/1, 20A) - Sends RS-485 signals to the VFDs for up to four independent exhaust fans and one SF/MUA
(multiple VFDs can be controlled with each signal).
B. Keypad - Controls lights and fans for up to 4 hoods (one keypad per I/O Processor).
C. Temperature Sensor - Monitors exhaust air temperature at duct (one sensor per exhaust duct).
D. Optic Sensor with APU - Monitors smoke load inside hood (one sensor set per Type 1 hood).
E. Variable Frequency Drive(s) (1/2-30 HP, 208-230/3, 460/3, or 575/3) - Varies fan speed (one VFD per fan).
F. Cables - Links I/O Processor to keypad, sensors, and VFDs. Must specify required lengths.
Temperature Sensor
Optic Sensor w/ APU
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Utility Cabinet with:
- I/O Processor
- Keypad
- VFDs
5508 Fair Lane, Cincinnati, OH 45227 USA
(513) 527-7020
Fax: (513) 527-7023
intellihood@melinkcorp.com www.melinkcorp.com
RESPONSIBILITIES
1. Hood manufacturer to pre-mount Melink Intelli-Hood system at factory.
2. Hood manufacturer to pre-wire system components with plug-n-play cables provided by Melink.
3. Melink to pre-program the system based on the application, using the Melink Simplissimo menu (i.e. Temperature span,
minimum speed, number of sensors).
4. Electrical contractor to field-wire the I/O Processor inside the utility cabinet with an input of 115/1 or 230/1 VAC from a
dedicated circuit. The output wiring shall be connected to the hood lights.
5. Electrical contractor to field-wire the electronic motor starters inside the utility cabinet by connecting 3-phase input
power from the circuit breakers. The output wiring shall be connected to the respective fan motor. The input and output
wiring shall be run in separate conduit for each starter. (Note: if there is a heated MUA unit, a separate circuit must feed the
controls. Do not use the motor circuit. Also, a control cable with at least 6 conductors shall be run from the MUA unit to the
I/O Processor).
6. Electrical contractor to connect plug-n-play cables from I/O Processor to each hood.
7. Electrical contractor to start-up the system by pressing the light and fan switch on keypad to verify the hood lights turn on
and the fans go to minimum speed. Correct fan rotation if necessary.
8. T&B contractor to air balance the system by pressing the 100% switch on keypad. Speed adjustments on belt-drive fans to
be made at the fan, and speed adjustments on direct-drive fans to be made at the electronic motor starters (VFDs)
***
Note: Output reactors must be installed if the distance between VFDs and motors exceeds 50 feet on 460 or 575 volt
applications.
SEQUENCE OF OPERATIONS
The operator presses the light and fan switch on the Keypad in the morning, and the fans operate at a preset minimum speed
during idle periods. Then the operator turns on the cooking appliances and the resulting heat load causes the fan speeds to
increase proportionately with the exhaust air temperature. Upon the detection of smoke/vapors inside the hood, the fans ramp
up to 100% speed to ensure proper capture performance (and compliance with national and local codes).
In the event the operator forgets to turn the fan switch on in the morning, the system will automatically turn on as the duct
temperature rises above 90F degrees. Similarly, the system will automatically turn off as the temperature drops below 75F.
In the event of any problem, the operator can press the bypass switch and operate the fans at 100% speed. This bypass feature
has a programmable timer to ensure the energy-saving mode is resumed after a period of time.
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5508 Fair Lane, Cincinnati, OH 45227 USA
(513) 527-7020
Fax: (513) 527-7023
intellihood@melinkcorp.com www.melinkcorp.com
FEATURES AND CAPABILITIES
* Improves energy-efficiency of hood system by reducing fan speeds during idle periods.
* Improves reliability of hood system by soft-starting the fans (less stress on belts & bearings).
* Improves comfort by reducing sensible and latent load during idle periods.
* Improves comfort by reducing hood noise in kitchen during idle periods.
* Improves fire-safety of hood system with automatic on/off feature based on heat.
* Improves fire-safety of hood system with early warning alarm in event exhaust temperature approached activation point of
fire suppression system.
* Reduces field labor with pre-engineered system installed at factory
* Eliminates need for conventional on/off magnetic motor starters.
* Provides upgrade ability to direct drive fans (lower cost, more efficient, less maintenance).
* Provides shutdown capability of make-up air unit with fire suppression system.
* Provides plug-n-play cabling for easy installation and start-up.
* Provides display of fan speed and fault diagnostics at Keypad.
* Provides programming capability at Keypad for application-specific parameters.
* Provides control of up to 4 hoods with (1) I/O Processor and (1) Keypad
* Provides five programmable 24VAC outputs for control of external devices
* Provides real-time clock for scheduling capability
* Provides six dry inputs for communication to processor for external commands, notifications, etc. via relay closures
* Provides one programmable form-C relay for control of external devices
* Optional features:
1) Comfort Mode: Adds economizer capability to the kitchen ventilation system by comparing kitchen and make-up air
temperature.
2) IAQ Control: Extends demand-based ventilation capability to include indoor air quality.
APPROVALS
The Melink Intelli-Hood Operator is UL and CSA Listed, and conforms with all applicable codes and standards including
NFPA 96, BOCA, SBCCI, ICBO, NSF, and CE.
WARRANTY
Melink Corporation warrants this equipment to be free of defects in material and workmanship
for a period of three years from the purchase date.
CONTACT
Melink Corporation, 5508 Fair Lane, Cincinnati, OH 45227 U.S.A.; Web www. melinkcorp.com
Ph 513-527-7020; Fax 513-527-7023; Email intellihood@melinkcorp.com
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5508 Fair Lane, Cincinnati, OH 45227 USA
(513) 527-7020
Fax: (513) 527-7023
intellihood@melinkcorp.com www.melinkcorp.com