Carrier 40UV Installation, Start-up And Service Instructions Manual

Also see for 40UV: Installation and service instructions Installation, Start-Up and Service Instructions

44The valve type is identified by the first digit of the two-digitcontrol code number. In Table 18, the water valve type isshown for each unit depending on coil capacity.For pressure drops other than those tested, see Table 19. SeeTables 20 and 21 for close-off pressure.Table 18 — Factory-Supplied Water ValvesLEGENDDX — Direct ExpansionCONTROL SEQUENCE APPLICATION VALVE APPLICATION NORMAL POSITION2A/3A Chilled/Hot Water (Modulating Valve) Control Chilled Water/Hot Water Open2B/3B Chilled Water Cooling, Hot Wateror Steam HeatingChilled WaterHot Water/SteamClosedOpen2D/3D Chilled Water Cooling, Electric Heat Chilled Water Open2F/3F Hot Water or Steam Heating Only Hot Water/Steam Open2G/3G Hot Water or Steam Heating, DX Cooling Hot Water/Steam Open2J/3J Chilled Water Cooling Only Chilled Water Open2K/3K Face and Bypass Chilled Water Coolingwith Valve Control HeatingChilled WaterReheatClosedOpen2M/3M Face and Bypass Chilled Water Coolingwith Valve Control ReheatChilled WaterReheatPreheatClosedClosedOpen20/30 Chilled Water/Hot Water Using Faceand Bypass Damper ControlChilled Water/Hot Water Open21/31 Chilled Water Cooling, Hot Water orSteam HeatingChilled WaterHot Water/SteamClosedOpen22/32 Chilled Water Cooling, Electric Heat Chilled Water Open23/33 Hot Water or Steam Heating, DX Cooling Hot Water/Steam Open24/34 Hot Water or Steam Heating Only Hot Water/Steam Open25/35 Chilled Water Cooling Only Chilled Water OpenNOTE: Dimensions are in inches (mm).Fig. 34 — Water Valve Dimensions(Modulating Type)ABRETURNSUPPLYABRETURNSUPPLYWATERCOILWATERCOIL3-WAY VALVE2-WAY VALVECOMFig. 33 — Typical Piping for Spring Return2-Way and 3-Way Mixing Valves