Évaluations - 6, GPA: 4.2
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Facilité d'utilisation
#2223.2e 21 WIRING DIAGRAM: Standing Pilot With Low Water Cut-off Device Note: Low water cut-off (LWCO) and system switch supplied by others. Fig. # 2223.1e WIRING DIAGRAM: IID Units With Low Water Cut-off Device Note: Low water cut-off (LWCO) and system switch supplied by others. Fig. # 2357E 22 4. SERVICING PROCEDURES CIRCULATOR GENERAL LOCATION OF CONTROLS CONTROL BOX COMPONENT LOCATIONS MODELS 135 & 180 2-Stage Controller Temperature (Auto Ignition Only) Sensor Fast- Response Relay Ignition Module Fig.# 8195.1 VENT SENSOR BYPASS VALVE (MODELS 135 & 180 ONLY) BYPASS LINE TEMPERATURE AND PRESSURE GAUGE 2-STAGED CONTROLLER (MODEL 90 ONLY) PRESSURE RELIEF VALVE RELAY ADJUSTABLE HIGH LIMIT FIELD WIRING COMPARTMENT FAST RESPONSE TEMPERATURE SENSOR IGNITION MODULE (AUTO IGNITION ONLY) TRANSFORMER ROLL-OUT SENSOR GAS VALVE Fig.# 8195.4 SEQUENCE OF OPERATION INTERMITTENT IGNITION DEVICE (IID) Boilers equipped with the IID system will automatically light the pilot burner first and then the main burner, each time there is a call for heat from the room thermostat. Whenever the room thermostat is calling for heat, the circulator supplied with the boiler, will be energized and should be running. The ignition control module will also be energized to initiate the pilot ignition by opening the first main valve (pilot). At the same time, the electronic spark generator in the module produces a high-voltage spark pulse output that lights the pilot burner. If the pilot burner does not light, the module will not energize the second main valve and the burners will not light. Ignition spark continues only until the timed trial for ignition period ends. Then, the module goes into safety shutdown or lockout. Lockout de-energizes the first main valve operator and closes the first main (pilot) valve in the gas control, stopping pilot gas flow. The ignition control system must be reset by setting the thermostat below room temperature for one minute or by turning off power to the module for one minute. When the pilot flame is established, flame rectification circuit is completed between the sensor and burner ground. The flame sensing circuit in the module detects the flame current, shuts off the spark generator and energizes the second main valve operator which opens the second main valve. This allows gas to flow to the burners where it is ignited by the pilot burner flame. When the thermostat is satisfied, the valve operators are de-energized shutting off the pilot and main burners, and also the circulator. 23 START-UP PROCEDURES Lighting the Boiler Safe-lighting and other performance criteria were met with the gas manifold and control assembly provided on the boiler when the boiler underwent tests specified in ANSI-Z21.13a 1983 Standard. CAUTION: Propane gas is heavier than air and sinks to the ground. Exercise extreme care in lighting boiler in confined areas. For Standing Pilot Models WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This boiler has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING Smell all around the boiler area for gas. Be sure to smell next to the floor because some gas is heavier than air 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. • If you cannot reach your gas supplier, call the fire department. C. Use only your hand to push in, move or turn the gas control knob or lever. Never use tools. If the knob or lever will not push in, move 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 boiler if any part has been under water. Immediately call a qualified service technician to inspect the boiler and to replace any part of the control system and any gas control which has been under water. Filling the System Fill system with water. Purge all air from the system using purge valve sequence. After system is purged of air, lower system pressure. Open valves for normal system operation, fill system through feed pressure regulator to minimum 12 PSI. Manually open air vent on the compression tank until water appears, then close vent. On multiple-zone systems, purge each zone separately. Isolate the other zones while one zone is being purged of air. Flush system before putting into operation to ensure that foreign material does not damage pump seals. Checking the Circulator Before lighting the boiler and after system is filled, make sure that circulator is operating properly. Manual gas valve should be off. By adjusting the wall thermostat to the maximum setting, circulator should run immediately and allow water to flow thro...
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