User manual FIELD CONTROLS 46401800

[. . . ] For power vented systems with a post purge device, the power venter and CAS operate for a period of time after the burner has shut off to purge remaining flue gases from the vent system. INSTALLATION SAFETY INSTRUCTIONS CAUTION: This device must be installed by a qualified installer in accordance with the manufacturer's installation instructions. This combustion air system must be installed by a qualified installer. "Qualified Installer" shall mean an individual who has been properly trained or a licensed installer. [. . . ] The point is approximately 2/3 of the horizontal distance between the left and right boundary of the region. The left boundary is the edge of the graph, the right boundary is the diagonal line that says "4 inch Duct, Hood & Orifice Ring. " Therefore, place the Orifice Ring into the inlet of the CAS so that it sits on the ledge above the fan. It does not matter which way the Orifice Ring is turned as long as it is pushed down against the ledge completely. Use 4" diameter pipe to connect the vent hood and the CAS unit. Install a VRV-6 and the included 4x6 inch Increaser on top of the CAS unit and adjust the balance weight to 2/3 of the distance of it's full adjustment range from it's minimum setting. The minimum setting is with the balance weight turned all of the way counterclockwise. Table 1 Total Input of Appliance CAS-4, 4mV Gas (BTU/hr) 50, 000 75, 000 100, 000 125, 000 150, 000 175, 000 200, 000 225, 000 250, 000 300, 000 350, 000 400, 000 450, 000 Maximum Equivalent Feet of Installation 4" Duct And Hood W/Restrictor HI 300 300 300 300 174 99 52 20 NA NA NA NA NA LOW 300 300 300 220 108 48 14 NA NA NA NA NA NA 4" Duct And 4" Intake Air Hood HI 300 300 300 300 232 152 102 68 45 16 NA NA NA LOW 300 300 300 220 118 63 32 13 NA NA NA NA NA 6" Duct And 6" Intake Air Hood HI 300 300 300 300 300 300 300 300 300 300 193 109 56 LOW 300 300 300 300 300 300 300 239 150 53 8 NA NA Page 3 HIGH SPEED SIZING CHART OIL INPUT FIRING RATE (gallons per hour) (1 gallon oil/hr = 140, 000 BTU/hr) 0. 00 300 0. 50 1. 00 1. 50 2. 00 2. 50 3. 00 3. 50 250 MAX. EQUIVALENT DUCT LENGTH (ft. ) 6" Duct & Hood 4" Duct & Hood 4" Duct, Hood, & Orifice 200 150 100 50 0 0 50 100 150 200 250 300 350 400 450 500 550 GAS INPUT FIRING RATE (1000 BTU/hr. ) Diagram A LOW SPEED SIZING CHART OIL INPUT FIRING RATE (gallons per hour) (1 gallon oil/hr = 140, 000 BTU/hr. ) 0. 00 300 0. 50 1. 00 1. 50 2. 00 2. 50 250 MAX. EQUIVALENT DUCT LENGTH (ft. ) 6" Duct & Hood 4" Duct & Hood 4" Duct & Hood w/ Orifice 200 150 100 50 0 0 50 100 150 200 250 GAS INPUT FIRING RATE (1000 BTU/hr. ) 300 350 400 Diagram B Page 4 INSTALLATION PLACEMENT OF THE CAS UNIT The motorized CAS unit should be located on a flat horizontal surface within the same space as that3 feet of the appliance and within 3 feet of the combustion air intake as possible. 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 3. Secure the brackets to a solid structure with appropriate fasteners. It is not required to use the brackets as long as the unit is located so that it may not be bumped, moved, or tipped over. The optional Vacuum Relief Valve (VRV) should be placed directly on the air inlet of the CAS unit if using 6". (See Figure 1) Refer to Diagram A to determine if the VRV is needed. The VRV should be oriented so that the axis of the swinging gate is horizontal. ASSEMBLING THE WEIGHTS ON THE VRV Refer to Figure 2 to assemble the weight assembly, hex nut, and knurled nut to the VRV gate. After the weight is correctly positioned, tighten the hex nut against the gate to prevent the weight assembly from moving during operation. INTAKE AIR HOOD LOCATION The 4" galvanized vent hood should be located on an outside wall maintaining minimum clearances to other intake and exhaust vents in accordance with the National Fuel Gas Code, ANSI Z223. 1, manufacturer's recommendations and/or local codes which are applicable. The hood should be located at least 10 feet from a power vented exhaust outlet and should be on the same wall. The intake air hood should be a minimum of 1 foot above grade or snowlines where applicable. INSTALLATION OF INTAKE AIR HOOD After determining the location of the vent hood, cut a 4-1/2 inch round or square hole in the wall. Insert the vent hood and secure with appropriate fasteners. [. . . ] Inspect the duct pipe for cracks and security to the CAS unit, VRV (if installed), and vent hood. Clear any obstructions, if present, from the inlet of the vent hood and the outlet of the CAS unit. Periodically, the fan blade chamber may need cleaning. First, disconnect the power supply to the CAS. [. . . ]