valutazioni - 2, GPA: 4.5
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Relief valve dripping 3. City pressure too high 3. Install a Pressure Reducing Valve (PRV) if city pressure is over 80psi. or opening 4. System over temperature 4. Determine cause of over temperature condition and correct problem. 5. Faulty relief valve 5. Replace relief valve. Discolored water at faucet 1. Poor water quality 2. Sediment or suspended particles 1. Have water tested for contaminants. 2. Install sediment filter, purge unit more often to avoid future problems. Boiler will not operate when calling for hot water 1. Improper or loose wiring 2. Boiler high limit has been reached 3. Post Purge (POS) set too high 4. Problem with boiler system 1. Check connections against wiring diagrams in this manual. 2. Boiler will periodically cycle on and off during operation. 3. Post Purge shuts the boiler off prior to reaching domestic setpoint. If set too high, the boiler may not have enough energy to raise the water temperature to setpoint. Reduce POS or set to 0 if the problem persists. 5. Have boiler diagnosed for proper operation. 1. PURGE HEAT EXCHANGER: The heat exchanger should be free of large air pockets to allow the circulator to operate properly. Using the diagram below as a guide, isolate the boiler return line and flush the loop until large air pockets are purged. After this, the air elimination equipment will collect smaller air bubbles. 2. FILL TANK: Open the hot water fixture furthest from the heater. Open the cold water supply and allow the water to run until air stops emerging. Air pockets may appear at any hot water fixture. This is considered normal and will clear as hot water is used. 3. START HEATER: Turn power on to the unit. Digital Control models come pre-set to 120°F for safety. Mechanical controls should have the knob rotated to the 120°F mark. The circulator or zone valve should operate and the boiler should start. 4. CHECK OPERATION: The water heater will begin to heat. Depending upon the size of the water heater, output of the boiler and the space heating load, the unit should typically reach set temperature within 15 to 60 minutes. If heating does not occur, consult the troubleshooting section in this manual. Note: Large heaters coupled with small boilers may exceed this time period upon initial startup. 5. SET TEMPERATURE: The control should be set to the minimum temperature consistent with the user’s needs. This maximizes efficiency and reduces scald potential. 6. The water heater and system should be periodically checked by a licensed professional at least annually and more often as system ages. 1. Close Return 3. Purge 2. Fill Air Boiler -9 10. General Safety Information SCALDING HAZARD. If the water temperature is over 120°F, household members can suffer serious or fatal scalding and painful and permanent injury. • The Consumer Products Safety Commission recommends an initial setting of 120°F, but advised that a slower response time of infants, aged, disabled and other persons increases the scalding hazard and may require lower settings. • Always check the water temperature before use, including washing, bathing or showering. • Temperature limiting valves are available from your plumbing supplier. A check valve must be installed in the boiler return line to prevent gravity flow through the heat exchanger. This can cause overheating and result in serious or fatal scalding. SCALDING HAZARD. If the thermostat is not working properly or if this product is not installed in accordance with the manual, water temperature can reach excessive levels that may cause serious or fatal scalding. After installation and any servicing of the unit, verify that the thermostat is working and firmly inserted in the thermostat well by following the thermostat testing instructions in the manual. Failure to use the correct replacement parts may make your product unsafe. In limited circumstances, space heating can be lost in the home with unit utilizing priority mode. Any demand for space heating is postponed until the water heater has reached its set temperature. This delay in supplying the space heating zones is usually not noticed by the inhabitants of the living spaces. However, in the event of certain malfunctions such as circulator or thermostat failure, space heating could be delayed indefinitely. If undetected and uncorrected, freezing damage to piping could result. If a steel hydropneumatic tank is in place, replace it with a properly sized diaphragm expansion tank. Otherwise, significant heat transfer problems can occur by causing air to be trapped in the heat exchanger. If the boiler system has a diaphragm expansion tank and the boiler temperatures are being changed, resize the expansion tank. If installing on city water supply, a properly sized thermal expansion tank is required with the water heater and should be installed as set forth in the product installation manual. Contact your water supplier or local plumbing inspector for additional information. Prevent pressure build-up in any e...
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