Melink Intelli-Hood Controls Reference Manual page 10

Operation/Service Specifications for Melink Intelli-Hood Operator
System Settings
Auxiliary VFD Output - This sets up how the signal is determined for the auxiliary VFD output.
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No - No auxiliary output
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Average - send the average of the used VFDs on board.
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Highest - send the highest of the used VFDs on board
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Lowest - send the lowest of the used VFDs on board
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VFD1 - send the same signal that is going to VFD 1
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VFD2 - send the same signal that is going to VFD 2
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VFD3 - send the same signal that is going to VFD 3
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VFD4 - send the same signal that is going to VFD 4
Auxiliary VFD Input - This sets up how the VFDs will respond to the auxiliary 4-20 mA VFD input.
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No - No auxiliary input
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Add - Add aux input to each VFD output
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Sub - Subtract aux input from each VFD output
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Average - Average aux input with each VFD output
Hang Time - Amount of time fans will be left at max speed and smoke alarm will be activated after
detection of smoke.
Relay Input - If #1 (No), then the remote input terminals are used for nothing. If #2 (Remote On/Off),
then the remote input terminals are used for remotely turning the fans on and off. If settings 3 through 5
(3 through 9 on V4.5 chips) are used, then the remote input terminals are used as inputs for a relay.
When this relay is closed then the minimum speed of 50%, 75%, 90%, etc. is used instead of the
minimum speed called out in hood menu #2. The external heat circuit is activated when the relay is
closed. When the relay is open then the minimum speed in hood menu #2 is used and the external heat
circuit is turned off.
Bypass Timer - If item 2 - 10 are selected this sets the bypass timeout. This sets the amount of time to
leave the system in bypass mode after the bypass switch on the front panel is pressed. The dipswitch on
the Autocal II board must be in the bypass timer position. Bypass mode can be turned off by pressing the
bypass switch again. If item 1 is selected then bypass mode can only be turned off by pressing the
bypass switch again.
Comfort Mode - When the comfort mode is enabled: if kitchen temperature is > 75 and outside
temperature < 75, then the VFD speed is increased up to max speed with a ramp of 1 minute. If the
kitchen temperature cools to < 70 or the outside temperature increases to >75, then reduce the VFD
speed back to automatic control. The kitchen and outside temperature sensors can be wired to the I/O
board terminal block (item #3) or to Temp #3 (kitchen) and Temp #4 (outside) (selection #4). Selection #1
and #2 will disable the comfort mode. Selection #2 will allow the MUA temperature sensor to be wired to
Temp #4 for short cycle hoods.
Miscellaneous - If item #1 is selected then there are no miscellaneous functions enabled.
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Win SB (item #2) - If kitchen temperature is less than or equal to 70, then the temperature
span automatically increases to the next higher range. If the kitchen temperature is greater
than 75, then the temperature span automatically revert back to original set point.
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Int Bar (item #3) - The bargraph displays the speed that the system is sending to the drive
instead of reading the speed from the drive. This will disable the VFD fault capability.
Alarm #2 Output - This sets up the function of the auxiliary 24 VDC output.
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Temp - Output is used as temperature set point #2 alarm.
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Smoke - Output is used as a smoke alarm.
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Starter - Output is used as control for a magnetic motor starter. The motor starter is turned
on if any of the exhaust temperatures exceed 90
o
F or smoke is detected or BYPASS mode is
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