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Please retain these instructions after installation.
This device MUST be installed by a qualified agency in accordance with the manufacturer's installation instructions. The definition of
a qualified agency is: any individual, firm, corporation or company which either in person or through a representative is engaged
in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the
precautions required, and has complied with all the requirements of the authority having jurisdiction.
READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY BEFORE PROCEEDING WITH THE INSTALLATION.
Installation Date:
Installed By: Phone:
COMBUSTION AIR SYSTEM
MODEL: CAS-4
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.
ITEMS INCLUDED IN KIT:
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
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