Smith GVX-Series Manuals

S-GVXUM-4 00-GVXUM TO THE INSTALLER: THIS MANUAL IS THE PROPERTY OF THE OWNER AND MUST BE AFFIXED NEAR THE BOILER FOR FUTURE REFERENCE. TO THE OWNER: THIS BOILER SHOULD BE INSPECTED ANNUALLY BY A QUALIFIED SERVICE AGENCY. GVX GAS BOILERS USER’S INFORMATION MANUAL WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS: • Do not try to light any appliance. • Do not touch any electrical switch. Do not use any phone in your building. • Immediately call your gas supplier from a phone outside of the building. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. Installation and service must be performed by a qualified installer, service agency or the gas supplier. BASIC OPERATION A. General. This water boiler is an induced draft appliance and is equipped with controls for proper operation. All controls must be in proper working order. Contact a qualified service agency to provide annual maintenance as specified in Installation, Operation and Maintenance Manual. 1. Limit. See Figure 1. A device which auto- matically interrupts boiler operation when the water temperature exceeds the set point. Maximum allowable temperature is 220°F (104°C). 2. Flame Rollout Switch. See Figure 1. A device which automatically interrupts boiler operation when flames or excessive heat are present in the combustion area. The control is a single use device. If the control is activated to interrupt boiler operation, do not attempt to place boiler in operation. Contact a qualified service agency. 3. Pressure Switch. See Figure 1. A device which automatically interrupts boiler operation when there is excessive blockage in the vent system or fan motor does not operate. This control is an automatic reset device. If control is activated to interrupt boiler operation, do not attempt to place boiler in operation. Contact a qualified service agency. 4. Pilot. The pilot provides the ignition source for the main burners. Your boiler has an intermittent pilot. The intermittent pilot ignites only when there is a call for heat and extinguishes when the call for heat ends. See Figure 5. 5. Gas Valve. The gas valve monitors pilot flame and regulates gas flow to the burners and pilot. See Figure 1. 6. Safety Relief Valve. A device which protects the boiler against excessive pressure. The safety relief valve can discharge a large amount of hot water - the installer should provide piping to discharge water near floor at a floor drain. See Figures 2 and 3. If the safety relief valve discharges water, follow instructions TO TURN OFF GAS TO APPLIANCE (see Figure 4), and contact a qualified service agency. B. Instructions to place boiler in operation and to turn off the boiler are shown on the Operating Instruction Label posted on the inner jacket panel of the boiler. The instructions are also shown in Figure 4. WARNING Service on this boiler should be undertaken only by trained and skilled personnel from a qualified service agency. USER’S INFORMATION MANUAL PAGE 2 CAUTION Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the electrical supply to the pump. Instead, shut off the gas supply at a location external to the appliance. En cas de surchauffe ou si l’alimentation ne se coupe pas, ne pas éteindre manuellement ni couper l’alimentation électrique de la pompe. Couper plutôt l’alimentation en combustible à l’extérieur de l’appareil Do not use this boiler if any part has been under water. Immediately call a qualified service agency to inspect the boiler and to replace any part of the control system and any gas control which has been under water. USER’S INFORMATION MANUAL PAGE 3 C. Sequence of Operation. 1. Thermostat calls for heat. 2. Limit control energizes circulator. 3. Limit control energizes B1 circuit if boiler water temperature is below setpoint minus differential. Setpoint is calculated according to thermostat cycle and economy/efficiency setting. See limit control literature for further information. 4. BR relay energizes blower. 5. Negative pressure induced by blower switches Pressure Switch, continuing power through closed contacts (BR-2) and flame roll-out switch. 6. Gas valve energizes. a. Ignitor on. b. Pilot gas on, igniting pilot. 7. Pilot flame detected. a. Ignitor off. b. Main gas on, igniting main burners. Note: If pilot flame is not detected within 90 seconds, the igniter and pilot are turned off for 5 minutes. The sequence then resumes at Step 6a. 8. Call for heat ends. a. Pilot and main gas off, extinguishing pilot and main burners. b. Blower and circulator off. If this sequence is not followed exactly, follow instructions TO TURN OFF GAS TO APPLIANCE (see Figure 2), and contact a qualified service agency. USER’S INFORMATION MANUAL PAGE 4 Figure 1: Control Locations Figure 2: Safety Relief Valve Hook-Up Installation with Air Elimination in System Piping Figure 3: Safety Relief Valve Hook-Up with Air Elimination