valutazioni - 3, GPA: 3.7
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• Never use Teflon tape on fuel oil fittings. • Tape fragments can lodge in fuel line components and fuel unit, damaging the equipment and preventing proper operation. • Use oil-resistant pipe sealant compounds. Fuel line valve and filter – • Install two high quality fusible-handle design shutoff valves in accessible locations on the oil supply line to comply with the NFPA 31 Standard. Locate one close to the tank and the other close to the burner, upstream of the filter. • Install a generous capacity filter inside the building between the fuel tank shutoff valve and the burner, locating both the filter and the valve close to the burner for ease of servicing. Filter should be rated for 50 microns or less. Wire burner Burner packaged with appliance WARNING! Electrical Shock Hazard Electrical shock can cause severe personal injury or death. • Disconnect electrical power before installing or servicing the burner. • Provide ground wiring to the burner, metal control enclosures and accessories. (This may also be required to aid proper control system operation.) • Perform all wiring in compliance with the National Electrical Code ANSI/NFPA 70 (Canada CSA C22.1) • Refer to appliance manufacturer’s wiring diagram for electrical connections. Burner installed at jobsite • Refer to Figure 7, for typical burner wiring, showing cad cell primary controls. Burner wiring may vary, depending on primary control actually used. The R7184 primary control with valve-on delay (prepurge) and burner motor-off delay (postpurge), requires a constant 120 volts AC power source supplied to the BLACK wire on the control. The RED wire goes to the appliance limit circuit. Please note that other control manufacturers may use different wire colors for power and limit connections. Special wiring required with covered burners The mounting plate is not a conduit connection point. Pass conduit and attached connector through the opening in the mounting plate and attach it directly to the burner-mounted 4x4 electrical box. If attaching a burner cover to a previously installed burner, attach the mounting plate and then slide the conduit into the “J” shaped conduit slot. RWB 6104 BAFG R02 Page 11 Typical Burner Wiring & Burner Sequence of Operation for R7184P Control. Refer to the appliance manufacturer’s wiring diagram for actual specifications. Figure 7. – Typical Burner Wiring 1. STANDBY. The burner is idle, waiting for a call for heat. When a call for heat is initiated, there is a 310 second delay while the control performs a safe start check. 2. VALVE-ON DELAY. The ignition and motor are turned on for a 15 second valve-on delay. 3. TRIAL FOR IGNITION (TFI). The fuel valve is opened. A flame should be established within the 15 second lockout time. 4. LOCKOUT. If flame is not sensed by the end of the TFI, the control shuts down on safety lockout and must be manually reset. If the control locks out three times in a row, the control enters restricted lockout. 5. IGNITION CARRYOVER. Once flame is established, the ignition remains on for 10 seconds to ensure flame stability before turning off. If the control is wired for intermittent duty ignition, the ignition unit stays on the entire time the motor is running. 6. RUN. The burner runs until the call for heat is satified. The burner is then sent to burner motor off delay, if applicable, or it is shut down and sent to standby. 7. RECYCLE. If the flame is lost while the burner is firing, the control shuts down the burner, enters a 60 second recycle delay, and then repeats the above ignition sequence. If flame is lost three times in a row, the control locks out to prevent cycling with repetitious flame loss due to poor combustion. 8. BURNER MOTOR-OFF DELAY. The fuel valve is closed and the burner motor is kept on for the selected motor-off delay time before the control returns the burner to standby. 61351 Control System Features Feature Interrupted Limited reset, Diagnostic LED, Valve-on Burner motor Alarm Con- ignition Limited recycle cad cell indicator delay off delay tacts R7184A YES YES YES — — — R7184B YES YES YES YES — — R7184P YES YES YES YES YES Optional Page 12 RWB 6104 BAFG R02 Start up burner/set combustion WARNING! Explosion and Fire Hazard Failure to follow these instructions could lead to equipment malfunc tion and result in heavy smoke emission, soot-up, hot gas puff- back, fire and asphyxiation hazards. • Do not attempt to start the burner when excess oil has accumulated in the appliance, the appliance is full of vapor, or when the combustion chamber is very hot. • Do not attempt to re-establish flame with the burner running if the flame becomes extinguished during start-up, venting, or adjustment. • Vapor-Filled Appliance: Allow the unit to cool off and all vapors to dissipate before attempting another start. • Oil-Flooded Appliance: Shut off the electrical power and the oil supply to the burner and then clear all accumulated oil before continuing. • If the condition still appears unsaf...
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