Overview of Primary Product

ManualsBrandsField Controls ManualsBoiler VentingBlower Wheel (CAS-7)

COMBUSTION AIR SYSTEM

Model: CAS-6, CAS-6SK, CAS-7, and CAS-7SK

This product is designed for use with any oil or gas fired furnace, water heater, or

boiler with 24 VAC or 120 VAC control systems. It may also be used with millivolt

water heaters and more than one appliance. The CAS unit mechanically draws air

into a structure and disperses it near the combustion air intake of an appliance.

Refer to Diagrams A & B for guidance in setting up the CAS system based on the

size and length of the connecting duct-work and the input rating of the appliance.

This device MUST be installed by a qualified agency in accordance with the manufacturers 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 gas appliances, who is experienced

in such work, familiar with all the precautions required, and has complied with the requirements of the authority having

jurisdiction.

DO NOT DESTROY

THESE INSTRUCTIONS MUST REMAIN WITH EQUIPMENT

TEMS INCLUDED

1) CAS unit (ETL Listed)

“Fan-in-a-Drum”

1) Star Kap (only on SK

Models)

2) Mounting brackets for

CAS unit

2) Wire/conduit connector(s)

1) 24VAC Control Relay

(SPDT)

1) 120VAC Control Relay

(SPDT)

2630 Airport Road Kinston, NC 28504

Phone: 252-522-3031 FAX: 252-522-0214

ww.fieldcontrols.com

Summary of content (12 pages)

PAGE 1
COMBUSTION AIR SYSTEM Model: CAS-6, CAS-6SK, CAS-7, and CAS-7SK ITEMS INCLUDED 1) CAS unit (ETL Listed) “Fan-in-a-Drum” 1) Star Kap (only on SK Models) 2) Mounting brackets for CAS unit 2) Wire/conduit connector(s) 1) 24VAC Control Relay (SPDT) 1) 120VAC Control Relay (SPDT) This product is designed for use with any oil or gas fired furnace, water heater, or boiler with 24 VAC or 120 VAC control systems. It may also be used with millivolt water heaters and more than one appliance.
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GENERAL SYSTEM OPERATION 1. The thermostat (wall thermostat, or aquastat) calls for heat and energizes a relay which activates the CAS unit. After the CAS fan has come up to speed, an internal air pressure switch closes and completes the circuit to allow the burner to fire. If the appliance is power vented, the venter and will typically activate before the CAS unit.. 2. After the heating requirement has been satisfied, the thermostat circuit will open and deactivate the burner and CAS unit. 3.
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DIAGRAM A CAS-6 (FAN + STARKAP SK-10) SIZING CHART MAX. EQUIVALENT FEET OF PIPE OIL INPUT FIRING RATE, GPH EQUIVALENT LENGTH OF PIPE (ft.) 2.90 200.0 3.90 4.90 5.90 6.90 175.0 7.90 12" PIPE 150.0 12" DUCT REGION 10" PIPE 125.0 8" PIPE 100.0 75.0 10" DUCT REGION 8" DUCT REGION 50.0 6" DUCT REGION 25.0 6" PIPE 0.0 400 600 800 INPUT FIRING RATE (BTU/H x 1000) #2 OIL = 140,000 BTU/GALLON 1000 1200 Diagram A DIAGRAM B CAS-7 (FAN + STARKAP SK-12) SIZING CHART MAX.
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Max. Equivalent Length of Pipe, Including StarKap© CAS-6 OIL (gph) CAS-6 GAS (BTU/hr) 8” duct 10” duct 12” duct 3 420,000 410 1253 3119 3.25 455,000 344 1051 2616 3.5 490,000 291 890 2217 3.75 525,000 249 760 1893 4 560,000 214 653 1627 4.25 595,000 185 584 1405 4.5 630,000 160 489 1217 4.75 665,000 139 424 1057 5 700,000 121 369 919 5.25 735,000 105 321 800 5.75 805,000 79 241 601 6 840,000 58 176 519 6.
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INSTALLATION PLACEMENT OF THE CAS UNIT The motorized CAS unit should be located on a flat horizontal surface near the combustion air intake of the appliance. Two mounting brackets are provided for securing the unit against a solid structure, such as a wall, column, or the side of the appliance itself. Use the included screws to attach the brackets to the CAS housing as shown in Figure 1. Secure the brackets to a solid structure with appropriate fasteners.
PAGE 6
sections describe the most common applications. The references to various series of control kits implies that any kit in that series may be used. Such as when a figure refers to a CK-60 series kit, a CK-60, 61, 62, etc. may be used. If further information or additional wiring diagrams are needed please consult Field Controls' technical support. INTERNAL WIRING CONNECTIONS FOR THE CAS UNIT Refer to Figure 3 for the internal wiring of the CAS-6/7 unit.
PAGE 7
Figure 7 Figure 8 Page 7
PAGE 8
Figure 9 Figure 10 Page 8
PAGE 9
Figure 11 – Chimney Vent 24V Boiler or Water Heater with Automatic Damper using DA-1 Adapter Harness Figure 12 – Water Heater or Boiler with 24V Automatic Damper and CAS-4 with Power Venter , using two ADA-1 Adapters Page 9
PAGE 10
Figure 13 MAINTENANCE 1. Inspect the system annually to ensure proper operation by observing that the fan activates when a call for heat occurs and deactivates when the call for heat is satisfied. 2. Disconnect power to the CAS unit and repeat Step 1. NOTE: The unit should not run and the appliance should not fire in this condition. 3. Inspect the duct pipe for loose joints, damage, and security to the CAS unit and StarKap. 4.
PAGE 11
REPLACEMENT PARTS The following items are available for replacement, if needed. In order to replace these parts, power must be disconnected and the unit must be disassembled. If this is necessary, take note of the positions and locations of whatever items that may need to be removed to replace other items. If in doubt, please consult the Field Controls Technical Support at 1-800742-8368.
PAGE 12
Limited Warranty Field Controls, L.L.C. warrants that the following Field Controls, L.L.C. products sold hereunder, shall be free from defects in material and workmanship under normal use for eighteen (18) months from date of manufacturing by the consumer excepting the provisions numbered below. Provisions: 1. 2. 3. 4. 5. Field Controls shall have no obligation in the event the customer is unable to provide receipt showing the date the customer purchased the product(s) or accurate date code information.