volume and the exhaust stack inlet shall allow adjustment of negative furnace pressure. The induced draft fan shall be belt driven to permit field adjustment of the air capacity. The drive belts and shall be enclosed in a removable housing. An exhaust gas temperature shall be provided on the exhaust stack.. CONTROL PANEL The electrical control panel shall contain a burner controller, circuit breaker and magnetic starter for the induced draft fan motor, controls for hot water bath recirculation pumps, and digester temperature controls. Controls shall be mounted and wired with rigid conduit and flexible watertight connectors in accordance with NEC. The electrical control panel shall be mounted on the side of the unit so as not to interfere with access to the burner, return breech, sludge tubes, or gas piping. The control panel shall have a enclosure with dual swing-out doors. The doors shall be lockable with disconnect switch and handle to ensure the doors are closed during operation. Starters and circuit breakers for digester recirculation pumps shall be provided in the heater and heat exchanger control panel. The following labeled switches and indicating lamps shall be provided on control panel doors: Sludge heater hand/off/auto switch. Constant water bath on/off switch. Exhaust fan continuous/intermittent switch. Sludge recirculation pump continuous/intermittent switch. Low boiler water indicator lamp. failure alarm horn, alarm horn silencer, and flame failure indicator lamp. Building heat recirculation pump auto/off switch. Tagged outlets shall be provided for: The main supply: volt, 3-phase, 60 hertz. The normally open contact to the magnetic starter for the raw sludge pump to ensure operation of a selected digester recirculation pump when the raw sludge pump is operating. The HP motors of the sludge recirculation pumps. The control circuit supply, single-phase, 60 hertz, 115 volt AC. The hot water circulating pump for building heat (pump provided by heating contractor). The building heat thermostat (thermostat provided by heating contractor). An isolated common circuit shall be provided for remote annunciation of the following:
volume and the exhaust stack inlet shall allow adjustment of negative furnace pressure. The induced draft fan shall be belt driven to permit field adjustment of the air capacity. The drive belts and shall be enclosed in a removable housing. An exhaust gas temperature shall be provided on the exhaust stack.. CONTROL PANEL The electrical control panel shall contain a burner controller, circuit breaker and magnetic starter for the induced draft fan motor, controls for hot water bath recirculation pumps, and digester temperature controls. Controls shall be mounted and wired with rigid conduit and flexible watertight connectors in accordance with NEC. The electrical control panel shall be mounted on the side of the unit so as not to interfere with access to the burner, return breech, sludge tubes, or gas piping. The control panel shall have a enclosure with dual swing-out doors. The doors shall be lockable with disconnect switch and handle to ensure the doors are closed during operation. Starters and circuit breakers for digester recirculation pumps shall be provided in the heater and heat exchanger control panel. The following labeled switches and indicating lamps shall be provided on control panel doors: Sludge heater hand/off/auto switch. Constant water bath on/off switch. Exhaust fan continuous/intermittent switch. Sludge recirculation pump continuous/intermittent switch. Low boiler water indicator lamp. failure alarm horn, alarm horn silencer, and flame failure indicator lamp. Building heat recirculation pump auto/off switch. Tagged outlets shall be provided for: The main supply: volt, 3-phase, 60 hertz. The normally open contact to the magnetic starter for the raw sludge pump to ensure operation of a selected digester recirculation pump when the raw sludge pump is operating. The HP motors of the sludge recirculation pumps. The control circuit supply, single-phase, 60 hertz, 115 volt AC. The hot water circulating pump for building heat (pump provided by heating contractor). The building heat thermostat (thermostat provided by heating contractor). An isolated common circuit shall be provided for remote annunciation of the following:
Combination%20Heater%20and%20Heat%20Exchanger%20Specification%20Template%20-%20NaturalGas-RModel.docx