Abstract: The present invention provides for a controller for an HVAC system comprising a controller assembly including a main housing having a mounting plate for mounting the controller assembly to a building wall, the mounting plate having at least one side and a back surface for facing the building wall when mounted thereto, a sheet receiving slot disposed in the back surface and the slot having a side opening in the side of the mounting plate, the slot configured for receiving an instruction sheet through the side opening in order to allow insertion and removal of the instruction from the slot.

Abstract: The invention provides for a controller such as a thermostat for an HVAC system comprising a housing having a circuit board and a display screen, the display screen having at least one alpha-numeric icon and a group of input control areas. A microprocessor is provided for controlling the display screen. Buttons are pressed in order to program set-points of the thermostat so that seven days may be programmed simultaneously. The display includes a seven day icon so that the user can program the thermostat set-points rapidly (e.g. setting time and temperature settings with minimal steps).

Abstract: An optical transceiver apparatus is provided having a housing including a diode package aligned with a lens and having an optical filler composition injected therebetween. The optical filler composition comprises a silicone elastomer which may be used as an index matching element, as a positioning and locking means, or an optical attenuator.