Field Controls CAC-120 User manual

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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.

page 2
Wire the controls in accordance with the National Electrical Code, manufacturer’s recommendations and/
or applicable local codes. UNIT MUST BE GROUNDED. Check ground circuit to make certain that the unit
has been properly grounded. The wiring should be protected by an overcurrent circuit device rated at 15
amperes. CAUTION must be taken to insure that the wiring does not come into contact with any heat source.
All line voltage circuits MUST be wired in accordance with the National Electrical Code for class one wiring
or equivalent methods.
Remove one knockout from the junction box on the fan proving switch side. Install line voltage power1.
supply wires to the CAS unit as shown in Figure 1.
Remove one knockout from the side of the junction box opposite the fan proving switch. Run line voltage2.
wiring to the appliance controls as shown in Figure 1.
Insert the 120 VAC relay into the base on the CAC-120 and secure with the retaining clip.3.
Install the junction cover and secure with the 4 provided sheet metal screws.4.
Wiring:
Figure 1

page 3
Fan Proving Switch Air Sensing Tube Installation:
Attach the provided plastic tubing to the fan proving switch on the CAC-120 using the plastic1.
compression fitting on the switch.
Cut the exposed tubing on the CAS-3 as shown in Figure 2. Install the provided plastic Tee and connect2.
the tubing from the CAC-120 to the Tee.
Figure 2

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© Field Controls, LLC P/N 46188900 Rev B 08/09
LIMITED WARRANTY
Field Controls, LLC (“Company”) warrants that its products shall be free from defects in material and workmanship
under normal use for the limited period indicated, from the date of manufacture, subject to the provisions 1-8 below.
Eighteen (18) months
All Field Controls Products (except for those listed below as 5 years or 90 days).
Five (5) years
Field Controls Direct Vent Systems (FDVS), Field Oil Vent Kits (FOVP), and ComboVents (CV).
Field Controls warrants that the products listed below shall be free from defects in material and workmanship under
normal use for the limited period indicated, from the date of purchase by the consumer, subject to the provisions
1-8 below.
Ninety (90) days
UV lamps/bulbs
Provisions:
1. During the limited warranty period, Company, or its authorized service representative, will repair or replace, at Company’s
option, without charge, a defective Product. Product that is repaired may be repaired with new or refurbished replacement
parts. Product that is replaced may be replaced with a new or refurbished product of the same or similar design. Company
will return repaired or replacement Product to customer in working condition. Labor charges are not covered as part of the
limited warranty.
2. With regard to UV lamps/bulbs, customer shall be required to include a "valid proof of purchase" (sales receipt) identifying
the Product purchased (Product model or accurate date code information) and the date the Product(s) was purchased.
3. Product whose warranty/quality stickers, Product serial number plates or electronic serial numbers have been removed,
altered or rendered illegible shall not be covered under the limited warranty.
4. Defective Product must be returned to Company, postage prepaid.
5. IN NO EVENT SHALL COMPANY BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR SIMILAR
DAMAGES (INCLUDING, BUT NOT LIMITED TO, LOST PROFITS OR REVENUE, INABILITY TO USE PRODUCT, OR OTHER
ASSOCIATED EQUIPMENT, THE COST OF SUBSTITUTE EQUIPMENT, AND CLAIMS BY THIRD PARTIES) RESULTING FROM
THE USE OF PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation or exclusion may not apply to you.
6. THIS WARRANTY AND REMEDIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, REMEDIES AND
CONDITIONS, WHETHER ORAL, WRITTEN, EXPRESS, STATUTORY OR IMPLIED. TO THE EXTENT PERMITTED BY LAW,
COMPANY DISCLAIMS ALL IMPLIED AND STATUTORY WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE.
7. Company makes no warranty of any kind in regard to other manufacturer’s products distributed by Company. Company will
pass on all warranties made by the manufacturer and where possible, will expedite the claim on behalf of the customer, but
ultimately, responsibility for disposition of the warranty claim lies with the manufacturer.
8. Product that has been subjected to misuse, accident, shipping or other physical damage, improper installation or application,
abnormal operation or handling, neglect, fire, water or other liquid intrusion are not covered by the warranty.