WattMaster VAVBOX Controller Tech Guide

www wattmaster com Controller Guide Of Contents Overview 3 3 Inputs and Outputs 5 5 Controller Analog Inputs 5 Controller Connections 5 Expansion Board Outputs 5 Installation Wiring 6 Wiring Considerations 6 7 Mounting 7 Sizing Wiring 7 Board Installation Wiring 8 Considerations 8 Commissioning 10 10 Addressing 10 Wiring 11 11 The Controller 12 Of Operations 13 13 Configuration Setup 13 14 Of Operation 14 Positions 15 Mode Sequences 15 Mode Sequences 16 Control 18 Override Logs 19 Detection And Reporting 19 Trend Logging 19 Modes or Overrides 20 21 LED To Verify Operation 21 Checks 22 Controls Inc NW River Park Drive Parkville MO 64152 Free Phone 866 918 1100 816 505 1100 FAX 816 505 1101 E mail mail wattmaster com our web site at www wattmaster com WM VAVBOX TGD 01B Copyright 2003 WattMaster Controls Inc Controls Inc assumes no responsibility for errors or omissions document is subject to change without notice Overview Controller manual applies to the VAVBOX controller that is included in the WattMaster products Dependent VAVBOX Kit For Units w o Fan Electric or Hot Heat Independent VAVBOX Kit For Units w o Fan Electric or Hot Heat Dependent VAVBOX Kit For Units or Fan Terminal Units Electric or Hot Water Heat Independent VAVBOX Kit For Units or Fan Terminal Units Electric or Hot Water Heat Technical Guide VAVBOX controller is provided with two relays for tri state con of the damper actuator All outputs and the relay common are elec isolated from all other circuitry on the board All relay outputs supplied with transient suppression devices across each set of con to reduce EMI and arcing The relay output contacts are rated for duty control of a maximum of 2 Amps 24 VAC or 24 VDC actuator connects via a modular cable to the board and provides the controller with feedback monitoring for precise positioning the actuator Output Expansion Board OE322 3 Relay with Analog Output Expansion board is used in with the VAVBOX Controller board to allow for control VAV terminal units including series and parallel fan terminal units up to 2 stages of electric heat or modulating hot water heat The 3 Relay with Analog Output Expansion board provides 3 outputs for pilot duty switching control and 1 Analog output for of a 0 10 V modulating hot water valve OE322 Output Expansion board connects to the VAVBOX board by means of a modular cable provided with the board Power is supplied to the board by means of this cable Screw terminals are provided for connection of field to the relay and analog outputs VAVBOX Controller is used for controlling airflow and operation VAV terminal units It is a programmable digital controller which for program setpoints to be stored in non volatile memory The is connected to a room sensor which monitors space tem allowing the VAVBOX controller to modulate a damper in re to space temperature duct temperature and airflow requirements the controlled space relay outputs are N O contacts with one common terminal All and the relay common are electrically isolated from all other on the board All relay outputs are supplied with transient devices across each set of contacts to reduce EMI and The relay output contacts are rated for pilot duty control of a of 2 Amps 24 VAC or 24 VDC The analog output provides 0