User manual FIELD CONTROLS 46311800

[. . . ] 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. After the heating requirement has been satisfied, the thermostat circuit will open and de-activate the burner and power venter circuit. [. . . ] Location of the termination of the venting system should be installed in accordance with the National Fuel Gas Code, A. N. S. I. Z233. 1, manufacturer's recommendations, and/or local codes which are applicable. See the following requirements or refer to Diagram A for typical locations. The exit termination of mechanical draft systems shall not be less than 7' above grade when located adjacent to public walkways. A venting system shall terminate at least 3' above any forced air inlet located within 10'. The venting system of other than a direct vent appliance shall terminate at least 4' below, 4' horizontally from, or 1' above any door, window, or gravity air inlet into the building. When venting oil fired equipment with a Field Control's CAS-2 series Airboot® kit, the intake air hood can be mounted within 12 inches of the power venter exhaust. The vent termination of a direct vent appliance with an input of 50, 000 BTU/Hr or less, shall be located at least 9" from any opening through which vented gases could enter the building. With an input over 50, 000 BTU/Hr, a 12" termination clearance shall be required. The vent termination point shall not be installed closer than 3' from an inside corner of an L-shaped structure. The vent termination should not be mounted directly above or within 3' horizontally from an oil tank vent or gas meter. The bottom of the vent terminal shall be located at least 12" above finished grade. CONNECTING VENTER TO APPLIANCE The venting system should be installed and supported in accordance with the National Fuel Gas Code ANSIZ223. 1, or in accordance with any local codes. A vent pipe connector shall be supported for the design and weight of the material employed, to maintain clearances, prevent physical damage and separation of joints. A vent pipe increaser or reducer may be required for connecting the venter to the vent system. Smaller vent pipe sizes than a chimney-vented system may be used for the vent system. Route the vent pipe from the appliance to the venter using a minimum number of elbows as possible. The horizontal section of the vent pipe should have a slight upward slope from the appliance to the venter. For clearances to combustible materials, multiple appliance venting and other installation requirements, refer to the National Fuel Gas Code ANSIZ223. 1, and/or any applicable local codes or appliance manufacturer's installation instructions. GENERAL WIRING INSTRUCTIONS CAUTION: Disconnect electrical power before wiring power venter!The PVO is designed to be used with appliances with 120VAC control systems. Wire the venter motor and controls in accordance with the National Electric Code, and/or applicable local codes. Check ground circuit to make certain that the unit has been properly grounded. [. . . ] Blower Wheel: Inspect the blower wheel annually to clear any soot, ash or coating which inhibits either rotation or air flow. Vent System: Inspect all vent connections annually for looseness, for evidence of corrosion and for flue gas leakage. Check the barometric draft control, if installed, to insure the gate swings freely. System Safety Devices: With the heating system operating disconnect the pressure sensing tube from the pressure switch on the venter. [. . . ]