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Orange County West Campus Office Building -HVAC <br />PDC Project 23020 BAS DIRECT DIGITAL CONTROL <br />SYSTEM 23 09 02 - 5 <br />2.06 CONTROL INSTRUMENTATION <br />A.Electric Damper Actuators <br />1.General <br />a.The actuator shall have mechanical or electronic stall protection to prevent damage to <br />the actuator throughout the rotation of the actuator. <br />b.Where shown,for power-failure/safety applications,an internal mechanical,spring-return <br />mechanism shall be built into the actuator housing.Alternatively,an uninterruptible <br />power supply (UPS)may be provided. <br />c.Proportional actuators shall accept a 0 to 10 VDC or 0 to 20 mA control signal and <br />provide a 2 to 10 VDC or 4 to 20 mA operating range. <br />d.All 24 VAC/VDC actuators shall operate on Class 2 wiring. <br />e.All actuators shall have an external manual gear release to allow manual positioning of <br />the damper when the actuator is not powered.Spring-return actuators with more than 7 <br />Nm (60 in.-lb)torque capacity shall have a manual crank for this purpose. <br />f.Electric actuators for emergency generator damper control shall be rated for 350 degree <br />F.maximum operating temperature and capable to drive fully open and close within 15 <br />seconds. <br />B.Temperature sensors: <br />1.Provide the following instrumentation as required by the monitoring,control and optimization <br />functions. All temperature sensors shall use platinum RTD elements only,nickel or silicon <br />are not acceptable. <br />2.Room Temperature:Thermistor <br />a.Temperature monitoring range +40/+90 F (+40/120 F for high temp alarms) <br />b.Installation adjustments none required <br />c.Calibration adjustments zero &span <br />d.Factory calibration point 70 deg F <br />e.Accuracy at calibration point +/-0.5 F <br />f.Integral LCD Display required <br />g.Override required <br />h.Local setpoint adjustment required <br />3.Liquid Immersion Temperature:RTD <br />a.Temperature monitoring range +20/+120 F or +70/+220 F <br />b.Installation adjustment none required <br />c.Calibration adjustments zero &span <br />d.Factory calibration point 70 deg F <br />e.Accuracy at calibration point +/-1.0 F <br />4.Duct Single Point Temperature:RTD <br />a.Temperature monitoring range +20/+120 <br />b.Installation adjustments none required <br />c.Calibration adjustments zero &span <br />d.Factory calibration point 70 deg F <br />e.Accuracy at calibration point +/-1.0 F <br />5.Duct Averaging Temperature:RTD <br />a.Temperature monitoring range +20/+120 <br />b.Installation adjustments none required <br />c.Calibration adjustments zero &span <br />d.Factory calibration point 70 deg F <br />e.Accuracy at calibration point +/-1.0 F <br />6.Outside Air Temperature:RTD <br />a.Temperature monitoring range -50/+122 <br />b.Installation adjustments none required <br />c.Calibration adjustments zero &span <br />d.Factory calibration point 70 deg F <br />Docusign Envelope ID: 8DED1454-68D2-4E36-9FC6-E56FF2124E5D