Abstract:
A method of controlling a gas furnace system includes controlling a motor of a draft inducer coupled to a conduit to increase a speed of the motor from a stopped condition in response to a call for heat, and receiving pressure signals output by a pressure transducer responsive to pressure in the conduit. Signals indicating whether a pressure switch responsive to pressure in the conduit is in a first state or a second state are received. A first status of the pressure transducer is determined based on the received pressure signals from the pressure transducer and the signals indicating whether the pressure switch is in the first state or the second state. The method includes continuing to operate the motor when the first status does not indicate that the pressure transducer is unreliable, and stopping the motor when the first status indicates that the pressure transducer is unreliable.
Abstract:
A method of controlling a gas furnace system includes controlling a motor of a draft inducer coupled to a conduit to increase a speed of the motor from a stopped condition in response to a call for heat, and receiving pressure signals output by a pressure transducer responsive to pressure in the conduit. Signals indicating whether a pressure switch responsive to pressure in the conduit is in a first state or a second state are received. A first status of the pressure transducer is determined based on the received pressure signals from the pressure transducer and the signals indicating whether the pressure switch is in the first state or the second state. The method includes continuing to operate the motor when the first status does not indicate that the pressure transducer is unreliable, and stopping the motor when the first status indicates that the pressure transducer is unreliable.
Abstract:
A method of controlling a gas furnace system includes determining a first pressure in a conduit coupled to a draft inducer from signals output by a pressure transducer positioned to sense a pressure within the conduit with a motor of the draft inducer in a stopped condition. A first status of the pressure transducer is determined based at least in part on the first pressure. The motor of the draft inducer is controlled to increase a speed of the motor from the stopped condition in response to a call for heat when the first status does not indicate that the pressure transducer is unreliable, and the motor is maintained in a stopped condition when the first status indicates that the pressure transducer is unreliable.
Abstract:
An example HVAC system includes a furnace including a gas valve, a circulator motor to circulate air through the HVAC system, and a current sensor configured to detect a current supplied to the circulator motor. The system also includes a controller configured to disable the gas valve when a detected current supplied to the circulator motor is outside of a specified operating current range. A detected current to the circulator motor outside of the specified operating current range is indicative of a malfunction of the circulator motor. Example methods of operating a gas valve in an HVAC system are also disclosed.
Abstract:
Exemplary embodiments are disclosed of a climate control system that includes an igniter and a controller having an igniter relay. The controller senses a current level through the igniter and senses voltage between terminals of a second relay of the controller. In a given one of a plurality of operational phases of the system, the controller is configured to compare the sensed current level and sensed voltage to a current level and voltage associated with a specific condition of the igniter, igniter relay, or second relay in the given phase. Based on a result of the comparing, the controller is configured to distinguish between a failure of one of the relays and a failure of the igniter.
Abstract:
An integrated furnace controller (IFC) for communicative coupling to a modulating gas valve assembly includes a processor and a memory. The memory stores instructions that program the processor to receive a call for heat and output a command to the modulating gas valve assembly in response to the call for heat. The command instructs the modulating gas valve assembly to control the modulating gas valve based on a desired gas flow rate and an orientation of the modulating gas valve.
Abstract:
A modulating gas valve assembly includes a modulating gas valve to variably control a flow of gas through the gas valve assembly and a control circuit. The control circuit includes a valve memory storing a calibration table for the modulating gas valve, and a controller communicatively coupled to the peripheral component. The calibration table includes a plurality of control settings for the modulating gas valve, each control setting being associated with a different gas flow rate. The controller is programmed to receive a command to open the gas valve, and to control the gas valve to a target control setting in the calibration table adjusted in accordance with a valve offset.
Abstract:
An example HVAC system includes an HVAC component, and an HVAC control configured to control the HVAC component according to an HVAC system configuration parameter. The HVAC control includes a controller wireless interface and a memory. The system also includes a mobile device having a user interface and a mobile wireless interface in wireless communication with the controller wireless interface of the HVAC control. The mobile device is configured to display the HVAC system configuration parameter on the user interface, receive user input settings for the HVAC system configuration parameter, and wirelessly transmit the received user input settings to the controller wireless interface of the HVAC control. The HVAC control is configured to store the received user input settings in the memory of the HVAC control to control the HVAC component. Example methods of controlling an HVAC system are also disclosed.
Abstract:
Exemplary embodiments are disclosed of a heating, ventilation and air conditioning (HVAC) system that includes a switched mode power supply. The switched mode power supply is configured to provide standby power to the HVAC system. The standby power may be limited substantially in accordance with power demand by one or more components of the HVAC system.
Abstract:
A valve apparatus includes substantially co-aligned first and second valve seats and substantially co-aligned first and second valve members. The first valve member is moveable relative to the first valve seat between at least an open position in which the first valve member is spaced from the first valve seat and a closed position in which the first valve member is seated against the first valve seat. The second valve member is moveable relative to the second valve seat between at least an open position in which the second valve member is spaced from the second valve seat and a closed position in which the second valve member is seated against the second valve seat. An armature is operable for moving the first and second valve members, in response to a magnetic field generated by a coil.