DIVISION 1 - GENERAL REQUIREMENTS - IDEAS-EC

2. Two-Way and Three-Way Modulating Valves: Select valve using pressure drop at leastequal to the drop in the coil or other load being controlled but not less than 5 psi.2 .11 DRAFT GAUGEA. Magnehelic draft gauge, 4-inch dial, range 0 to 2 inches water, accuracy plus or minus 2 percentof full scale.2 .12 THERMOMETERSA. 3-1/2-inch dial or liquid type with nominal scale length of 7 inches. Scale range suitable for theintended service.PART 3 EXECUTION3 .1 INSTALLATIONA. Locate thermostats 54 inches above finished floor.3 .2 SENSORS/TRANSMITTERSA. Provide NEMA 4X enclosures for outdoor installations.B. Mount sensor/transmitter enclosures so the sensor can be removed and serviced withoutdisturbance or removal of insulation.C. Seal penetrations of insulation vapor barrier with vapor barrier coating compound.D. Duct Sensors: Securely seal ducts where elements or connections penetrate duct.E. Immersion Sensors: Install wells in pipe elbows where pipe diameters are smaller than the lengthof wells. Install lag extension type wells to extend at least 1/2 inch above insulation. Install wellswith sealing nuts and thermal transmission material.F. Install isolation valves between pressure sensors and pressure source.3 .3 CONTROL VALVES AND SEPARATE SOCKETSA. Install hydronic control valves, wells, sockets, and accessories as specified in Section 15500.3 .4 CONTROL DAMPERSA. Install control dampers as specified in Section 15810. Damper motors shall have metal stops tolimit actuator travel.B. Install parallel bladed damper for two-position control and opposed bladed dampers formodulating control.3 .5 DRAFT GAUGEA. Install draft gauge on each filter except for room fan coil units.3 .6 PRESSURE GAUGES15915-5ELECTRIC AND ELECTRONIC CONTROLS