Field Controls 46266302 CAS-4 Fan In A Can Combustion Air System For 24V Gas Systems Only
What's Included 1- Motorized Blower 1- 4" galvanized intake air Vent Hood 2- Mounting brackets to secure the CAS to a wall 2- Wire/conduit connectors 1- 4" x 6" Pipe Increaser Fitting 1- 6" Orifice Ring 1- Instruction Sheet 1- High/Low Motor Speed Switch
How the CAS-3 and CAS-4 work When the thermostat calls for heat, the Fan-in-a-Can engages and begins drawing air into the structure. When air flow is established, the pressure switch closes. The CAS sends a signal to the appliance, allowing the burner to fire. The Fan-in-a-Can diffuses the outside air into the room near the burner to ensure adequate air for efficient combustion.
Can be used t replace Tjernlund PAI-1G, PAI-2G, PAI-3, PAI-4
CAS-4 (Gas) This product is designed for use with any natural gas or LP burning furnace, water heater, or boiler with a 24 VAC control system. It may be used with a millivolt powered system with additional hardware. It may also be used with more than one appliance. The CAS unit mechanically draws air into a structure and disperses it near the combustion air intake of an appliance. If an optional Vacuum Relief Valve (VRV) is used, the incoming air is tempered before entering the structure's airspace. Refer to Diagrams A and B for guidance in setting up the CAS system based on the size and length of the connecting ductwork and the input rating of the appliance.