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Manafacture: Field Controls File size: 546.6 kb File name: 47557620-885f-4f63-bfae-4d346f9b02d7.pdf Language of manual:

The PVO may be used to common vent multiple appliances with the addition of a Control Kit. Please consult Field Control’s Technical Support for other options. TYPICAL VENTING SYSTEM COMPONENTS One PVO Series Power Venter with pre-wired controls; adjustable post purge relay timer, adjustable draft proving switch, direct access terminal blocks, and piping tee for multiple appliance systems. • Side Wall Vent Hood (Not included) • Spill Switches (Not included) • CK-Series Control Kit for multiple appliance venting (Not Included) CONTENTS PAGE Unit Specifications 2 System Operation 2 Power Venter Sizing 3 Installation Safety Instructions 4 Installation of Power Venter 5 General Wiring Instructions 5-6 Airflow Adjustments 7 Pressure Switch Adjustments 7 Post Purge Timer Adjustments 7 Multiple Appliance Systems 7 General Installation Inspection 8 Maintenance 8 Replacement Parts List 9 Venting System Operational Information 10 Installation Information 10 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 Page 2 UNIT SPECIFICATIONS (See Table 1 and Figure 1) Table 1 UNIT DIMENSIONS (INCHES) MODEL “H” “W” “D” I/O* PVO-300 7.50 9.25 7.00 4/4 PVO-600 8.75 9.75 8.50 4/4 *Inlet and outlet diameter. ELECTRICAL RATINGS MODEL VAC Hz RPM WATT AMP TP** PVO-300 120 60 3000 145 2.1 YES PVO-600 120 60 3000 167 1.5 YES **Thermally protected motor. SIDEWALL VENT HOODS (Model SWH-1) Sidewall vent hoods are available in the following sizes. The vent hood should be chosen that matches the outlet size of the Power Venter. (See Figure 2) NOTE: When using different sizes consider reducers and specific size pipe when determining equivalent length of vent pipe. SWH-1-3 - 3 inch SWH-1-4 - 4 inch SWH-1-5 - 5 inch SWH-1-6 - 6 inch SWH-1-8 - 8 inch CONTROL KITS The following Control Kits can be used to common vent multiple appliances with on PVO unit: CK-61: For operation with all 120VAC oil-fired systems. Includes draft proving switch, adjustable electronic post purge timer, RJR isolation relay, and WMO-1 secondary safety switch. CK-62: Same as CK-61, except has thermally activated post purge. CK-63: For operation with all 120VAC oil-fired systems. Includes draft proving switch, adjustable electronic post purge timer, and WMO-1 secondary safety switch. SYSTEM OPERATION 1. The thermostat (wall thermostat, or aquastat) calls for heat and energizes a relay which activates the power venter. After the venter motor has come up to speed, the pressure switch closes. This completes the circuit to the burner and allows the burner to fire. 2. After the heating requirement has been satisfied, the thermostat circuit will open and de-activate the burner and power venter circuit. 3. The power venter continues to operate for a period of time after the burner has shut off to purge remaining flue gases. Figure 2 Figure 1 POWER VENTER SIZING In order to choose the correct size power venter for a particular installation, the total input firing rate and total equivalent length of vent pipe to be used must be known. Refer to Table 2 to determine the maximum allowable equivalent feet of pipe for each model used with the pipe diameters shown. When venting multiple appliances, add the input of each appliance to determine the total input. Always choose a power venter that is capable of handling more than the system requires. The choke plate can be adjusted to compensate for the difference. Table 2 MAXIMUM EQUIVALENT HORIZONTAL PIPE LENGTH (FEET) BTU/HR INPUT VENTER MODEL NO. AND VENT PIPE DIAMETER PVO-600 8” 0.75 287 --------- ------ 1.00 150 257 346 428 ------ 1.50 75 120 172 212 ------ 2.25 ---51 70 86 143 211 3.00 ---------46 74 116 3.75 --- --- --- --- 51 84 4.00 --- --- --- --- --- 77 PROCEDURE FOR CALCULATING TOTAL EQUIVALENT PIPE LENGTH IN FEET 1. Calculate the total equivalent feet for each type of fitting used in the venting system from the following chart. 2. Calculate the total amount of feet for the straight lengths of vent pipe. 3. Add the equivalent feet for the fittings with the total amount of feet of straight lengths. Table 3 VENT PIPE FITTINGS VENT PIPE DIAMETER 10” TEE 19 25 31 38 44 50 56 63 90° ELBOW 5 7 9 11 12 14 16 18 45° ELBOW 3 4 4 5 6 7 8 9 REDUCER (d/D)* 1/4 8 11 14 17 19 22 25 28 1/2 5 7 8 10 12 13 15 17 3/4 2 3 3 4 4 5 6 6 *Reducer or increaser ratio (d/D) small diameter divided by the larger diameter. (See Figure 3) Example: 4" to 8" reducer, the reducer ratio is d/D = 4/8 = 1/2. To estimate the equivalent foot length for the fitting, use t...

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