Field Controls CAC-120 Installation

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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:
CAC-120 COMBUSTION
AIR CONTROL
This kit is designed to control more than one appliance on a system using the Field Controls CAS-3
Combustion Air System with a chimney vented oil fired system. The controls in the CAS-3 will operate only
one appliance, therefore a CAC-120 is required for each additional appliance to be added to the same
CAS-3 unit. One CAS-3 unit can handle at max, a total combined firing rate input of up to 500,000 BTU/
Hr. Refer to the instructions included with the CAS-3 for more details and other restrictions.
Mounting Junction Box:
Items Included In Kit:
1) Junction box with mounted fan proving switch and relay base
1) 120 VAC relay
1) Conduit connector
1) 10 Ft. length of
1
4" plastic tubing
1) Plastic Tee
The junction box may be mounted anywhere that is convenient for routing the wiring and tubing. Mount the
CAC-120 to a wall or floor joist using the four dimpled locations on the base of the box (See Figure 1.)
Note: The unit must be mounted so the draft proving switch is vertical as shown in Figure 1. The CAC-120
should be placed close enough to the CAS unit to route the provided 10 foot long plastic tubing from the
draft proving switch to the exposed tubing on the CAS. If mounting further away, the installer must provide
any necessary fittings and extra tubing.