Variable volume multizone system
AssigneeCarrier Corporation
InventorsDonald C. Wellman, William E. Clark
Life of this patent
Estimating the term…
Abstract
A zoned variable volume system is provided with a pair of non-connected dampers in each zone. The first damper controls flow through a cooling coil. The second damper controls flow through a heating coil and provides heated or neutral air depending upon whether or not the heating coil is actuated. The fan speed is adjusted to cause at least one damper to be fully open so that the system operates at a minimum static pressure.
Claims7
A method for operating a variable volume multizone system having a variable volume air supply and a plurality of zones with each of said plurality of zones having a first damper for controlling the flow of air into the zone from the variable volume air supply through a cooling coil, a second damper for controlling the flow of air into the zone from the variable volume air supply through a heating coil and means for heating the heating coil including the steps of:
- sensing the temperature in each zone;
- if the temperature in any zone is above a first adjustable set point for the zone, supplying air to the zone through the cooling coil only and adjusting the position of the first damper to regulate the flow to the zone;
- if the temperature in any zone is below a second adjustable set point for the zone, supplying air to the zone through the heating coil only, heating the heating coil and adjusting the position of the second damper to regulate the flow to the zone;
- and
- if the temperature in any zone is below said first adjustable set point and above said second adjustable set point supplying air to the zone through the unheated heating coil and adjusting the position of said second damper so as to maintain an adjustable minimum flow into the zone.
Dependencies are inferred from the claim text.