10
Installation Check List
Is Control Box mounted next to the exhaust hood(s) it controls (See Pg. 2)?
Are two separate circuits (120VAC 15AMP control and 120VAC 15AMP hood lights) connected from breaker panel
to control box per NEC (See Pg. 5)?
Are hood lights connected from the Control Box to the hood light junction box per NEC (See Pg. 5)?
Are hood sensor(s) connected from hood(s) to Control Box (One sensor per hood or hood section)? Check dip
switch position (See page 6).
Is there a Micro-Switch wired to the control box from the fire system (See Pg. 6)?
Warning: Do not apply voltage
through Micro-Switch. This WILL cause damage to the control board.
Is input power of proper Phase and Voltage from the breaker panel connected to each VFD terminals L1, L2, and
L3 per NEC in the Control Box (See Pg. 7)?
Is the ¼” tubing (provided) connected to the Outdoor Pick-Up, routed through conduit (as identified on Pg. 7) to the
Control Box and connected to the “Outdoor” connection (the open port) on the pressure sensor in the Control Box
(See Pg. 7)? Is Outdoor Pick-Up installed upright (removable cover facing up)?
Note: This is required for
differential building pressure control. If unable to install tubing from the Outdoor Pick-Up to the Pressure
Sensor in the Control Box, contact technical support at 800-322-4036.
Is output power from VFD(s) terminals U, V, and W in the Control Box connected to the proper fan(s) on the roof
(Exhaust to Exhaust, Supply to Supply) per NEC (See Pg. 8)?
Notice:
Regardless of input power VFD(s) will
only output 3 PH power.
Optional Equipment:
If a shunt trip breaker is required, connect the shunt trip control voltage from the Control Box terminal Shunt Trip
Hot (STH) to the trip terminals on the shunt trip breaker (a neutral may be supplied from breaker panel). This will
provide 120V 1 PH power to trip the breaker in Fire Mode (See Pg. 9).
If a Tempered MUA unit is used, connections from the control box to the Tempered MUA unit must be made to
terminals R and W1 for control of tempering lock-out. Jumper from terminal R and W1 must be removed when
making this connection (See Pg. 8).
If Wiring for building fire alarm, strobe horn, etc. is required field wire to the proper Common, Normally Closed or
Normally Open terminals in the control box. Up to 120V 15A power may be connected to C2 and/or C3 for
activation or de-activation of auxiliary controls in Fire Mode. The NC2 and NO2 terminals will have whatever
voltage has been connected to C2. The NC3 and NO3 terminals will have whatever voltage has been connected
C3. In Fire Mode, NC2 and NC3 contacts will open and no longer have the connected power through these
terminals for “Off in Fire”. At the same time, NO2 and NO3 will close in Fire Mode supplying the connected voltage
to those terminals for “On in Fire” (See Pg. 9).
For technical support contact Larkin Industries, Inc. 1-800-322-4036
System Startup
Turn on all breakers that power the fan VFD(s), Control Box power, hood lights. The color touch screen display
should power on. If display needs calibration, simply touch the dots on the screen. Check for proper voltage at all
terminals with fan control off. Each VFD should have a blue blinking “Ready” light with “STOP” displayed on the
keypad. Keypad should be moved from one VFD to another to ensure all VFDs are in “Stop” mode. Cooking
equipment should be off, fan(s) should not be operating and “System Off” should be on the display.
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