Assessments - 4, GPA: 4.3
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If the high limit setting is exceeded, relay coil 2K will be de-energized, turning off the burners and combustion fan. The circulator will continue to run until the call for heat is satisfied, regardless of the water temperature. 9) At the end of a burner cycle, the normally closed contacts on the vacuum switch should make after the fan is de- energized. If this does not happen, there will be no current path to relay coil 2K upon the next call for heat and the boiler will not fire. 10) The flame rollout switch is a normally closed thermal switch that is positioned at the burner compartment opening. In the event that flames exit this opening, the flame rollout switch will open, de-energizing the ignition module and closing the gas valve. Once opened, this switch must be replaced. 34 35 IX Start-up and Checkout NOTE SAFE LIGHTING AND OTHER PERFORMANCE CRITERIA WERE MET WITH THE GAS MANIFOLD AND CONTROL ASSEMBLY PROVIDED ON THE BOILER WHEN THE BOILER UNDERWENT THE TESTS SPECIFIED IN Z21.13 Use the following procedure for initial start-up of the boiler: 1) Make sure that the boiler and system are filled with water. WARNING • IF ANTIFREEZE IS USED IN THE SYSTEM, IT MUST BE A NONTOXIC TYPE SUCH AS PROPYLENE GLYCOL. • NEVER ATTEMPT TO FILL A HOT EMPTY BOILER. 2) Check all new piping for leaks and purge piping sections that are filled with air. See Part 4 of the National Fuel Gas Code for additional information on testing and purging gas lines. WARNING • NEVER USE A FLAME TO CHECK FOR GAS LEAKS. • MAKE SURE THAT THE AREA AROUND THE BOILER IS CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE, AND OTHER FLAMMABLE VAPORS AND LIQUIDS. 3) Vent system must be complete and free of obstructions before attempting to fire boiler. Make sure that the silicone cure time called for in the vent assembly instructions has passed before firing boiler. 4) Inspect all line voltage wiring for loose or uninsulated connections. 5) Start the boiler using the lighting instructions on page 36. NOTE The combustion chamber insulation panels in this boiler contain a cornstarch based binder which may emit a strong odor as it is burned out of the insulation when the boiler is fired for the first time. An hour or more of continuous firing may be required to burn off all of this binder. Open any windows and outside doors in the boiler room to maximize ventilation while this binder is burned out. 6) Inspect the pilot and main flames. These flames should be stable and mostly blue (Fig. 37, 38). No yellow tipping should be present; however, intermittent flecks of yellow and orange in the flames are normal. 7) Check the manifold pressure and adjust if necessary. To do this, use the following procedure. WARNING FAILURE TO FOLLOW THE FOLLOWING PROCEDURE EXACTLY COULD RESULT IN OVERFIRING OF THE BOILER AND A CARBON MONOXIDE HAZARD. a) Connect a manometer to the line pressure tap on the gas valve b) Check the line pressure with all gas appliances on and off. The line pressure at the boiler must be within the following limits regardless of what combination of appliances is firing: Line Press (inches w.c.) Natural Gas LP Gas Min. 5.0 11.0 Max. 14.0 13.0 36 FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosionmay result causing property damage, personal injury or loss of life. A. This appliance is equipped with an ignitiondevice which automatically lights the pilot. Do not try to light the pilot by hand. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier thanair and will settle on the floor. WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance. Do not touch any electric switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. 1. STOP! Read the safety information above on this label. 2. Set the thermostat to lowest setting. 3. Turn off all electric power to the appliance. 4. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand. GAS OUTLET GAS CONTROL KNOB (SHOWN IN “ON” POSITION) GAS INLET GAS VALVE -TOP VIEW If you cannot reach your gas supplier, callthe fire department. C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion. D. Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water. OPERATING INSTRUCTIONS 5. Remove front access panel. 6. Rotate the gas control knob clockwise to OFF. 7. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you then smell gas...
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