Larkin AFC-DCV Installation, Operation And Maintenance Instructions Download Page 2

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Mounting

•

The AFC-DCV Control Box will be housed in an 18” x 26” x 8” stainless steel enclosure and should be
secured to a fixed wall near the exhaust hood(s) it controls (Fig. 1).

NOTICE: The VFD’s produce heat

and must have proper ventilation. THE AFC-DCV ENCLOSURE CAN NOT BE RECESS MOUNTED.

Fig. 1

Summary of Contents for AFC-DCV

Page 1: ...all mount control box includes the following Wall mounted 18 x 26 x 8 stainless steel enclosure with hinged door and tamper resistant latch Color touch screen display mounted on enclosure door for system operation Exhaust and Make Up Air MUA fan s are interlocked If hood fire suppression system is activated the lights and MUA fan s shut down The Exhaust fan s will continue to operate at 100 Temper...

Page 2: ...oused in an 18 x 26 x 8 stainless steel enclosure and should be secured to a fixed wall near the exhaust hood s it controls Fig 1 NOTICE The VFD s produce heat and must have proper ventilation THE AFC DCV ENCLOSURE CAN NOT BE RECESS MOUNTED Fig 1 ...

Page 3: ...l to Control Box for fan s See wiring diagram F 3 Phase wired from Control Box to fan s See wiring diagram G tubing from pressure sensor in control box to outdoor pick up Note If unable to install tubing to pressure sensor pick up contact technical support at 800 322 4036 Note If Tempered MUA is provided the tempering lock out connection must be made from the Control Box to the tempered unit on te...

Page 4: ...nting sensor between a light and the end of the hood may be required on shorter hoods CAUTION If sensor is located too close to a light fixture the heat generated could activate the system The sensor s should be centered between lights Wiring Instructions The Larkin AFC DCV components are all prewired The field wiring required to connect the Control Box to the hood s and breaker panel should be ma...

Page 5: ...pered MUA unit a tempering lock out connection must be connected to the Tempered MUA unit from the control box or the unit may not operate properly see Tempered MUA Unit wiring diagram connections from R and W1 Pg 8 Field Wiring Requirements for Control Panel Control Circuit Field wire 120 VAC 1 Phase 15 AMP circuit to the Control Panel terminals Control Hot CH Control Neutral CN and Ground GND fr...

Page 6: ...nnected to the terminal strip and the dip switch for that sensor is in the off position the auto activation and DCV functions of the system will not be active for that sensor Micro Switch The Larkin AFC DCV requires a Fire Suppression System Micro Switch connection The Micro Switch should be field wired from the Fire Suppression System to the Control Box connecting the Common C lead from the Micro...

Page 7: ...Connect tubing to the Outdoor connection the open port on the pressure sensor The Indoor connection should already have tubing connected to the Indoor Pick Up in the top of the Control Box 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 Fan Input...

Page 8: ...he Control Box to the Tempered MUA unit If this connection is not made the unit may not operate properly Tempered MUA units may not operate properly below a 50 volume This connection allows the Control Box to lock out the heat cool function of the unit when the turn down is below 50 When a Larkin Industries Tempered MUA unit is provided use low voltage wiring from terminal R and W1 in the Control ...

Page 9: ...closed connections C2 NC2 NO2 and C3 NC3 NO3 Contacts are provided for activation of building alarm horn strobe etc 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 to C3 In Fire...

Page 10: ...hunt 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 ou...

Page 11: ...ssure Hood sensor temperature on the display should be approximately the same as the room temperature Check the rotation of the fan s Note The exhaust fan s will exhaust some air while rotating in reverse Checking rotation may be accomplished in two different ways 1 you may check the direction arrow on the fan s or 2 depress the 100 Override button on the display and monitor the motor amperage dis...

Page 12: ...eturn to return to the previous menu Adjusting Max Speed The max Exhaust speed will need to be adjusted if the MUA cannot maintain correct pressure Connect the keypad to the VFD controlling the fan to be adjusted Using the above instructions navigate to parameter P430 03 This will display 60HZ If the fan speed needs to be adjusted depress the Scroll Down button to lower the max HTZ of the fan Depr...

Page 13: ...or multiple hood systems when any hood sensor s detects a temperature rise the fan s and light s will automatically energize for all hoods connected to that Control Box Note Allow the system to continue operating after the automatic activation to perform fire system test described below 3 For this portion of the test the system should still be operating in automatic mode described above The system...

Page 14: ...st this system except in extreme cases Please consult factory before attempting any adjustments The microprocessor based controller contains 4 basic adjustments Note Advanced settings are password protected in the menu of the touch screen display If your system is not operating properly do not attempt adjusting controller before contacting customer support at 800 322 4036 The AFC DCV system is des...

Page 15: ...15 See Pg 6 ...

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