Steam Coils: Select steam coils with integral face and bypass dampers and two position on/off control valves.
Steam Coils: Select steam coils with integral face and bypass dampers and two position on/off control valves. As an option, for non-100% outdoor air units, consider the use of a distributing type steam coil with a modulating control valve. Ensure that
steam condensate is removed from the coil as soon as it is formed by selecting the correct steam trap size and type, adequate static leg for the gravity drain, and the recommended slope for the gravity return.
Hot Water Coils – Without Glycol: Provide a dedicated circulating pump in the coil circuit with hydronic separation between the coil circuit and the incoming hot water piping to maintain a constant water velocity of 3.0 fps [0.9 m/s] through the coil tubes. Select coils with wider fin spacing at the rate of 6 fins/in or 8 fins/in [0.24 fins/mm or 0.31 fins/mm]. Provide coil connections to ensure that the coldest air faces the hottest fluid.