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Hersteller: GE Dateigröße: 315.7 kb Dateiname: 50294fb8-1acf-4a26-9b67-7a76f2f8542d.pdf Unterrichtssprache:

The flue gasses pass their heat on to the water by means of radiation and convection. The exhaust of the flue gasses is realized by natural thermal draught (see figur 1). Dead legs on a hot water installation are undesireable. Where possible they should be avoided. When the inclusion on the system of a dead leg is unavoidable the following restrictions should be applied: -for pipes not eceeding 19 mm. inside diameter; maximum length of dead leg permitted 12 metres; -for pipes exceeding19 mm. but not exceeding 25 mm. inside diameter; maximum lenght of dead leg 7,5 metres; -for pipes with an inside diameter exceeding 25 mm. maximum length of dead leg 3 metres. Figur 1 - Cross section of the heater 1) Draught diverter 2) Hot water outlet 3) Insulation 4) Flue tube 5) Glass lined tank 6) Gas valve and spark ignition 7) Control panel 8) Inspection cover plate 9) Intermittent pilot burner and flame probe 10) Cold water inlet 11) Combustion products discharge safety device 12) T&P valve connection 13) Outer casting 14) Flue baffle 15) Magnesium anode 16) Drain valve and secondary return connection 17) Main burner 1.2 Technical safety equipment 1.2.1 Gas control valve The water heater is equipped with a gas control wich regulates the flow of gas to the burner. The gas block is equipped with a safety valve, gas valve and burner control (on a standard natural gas setting). To ensure improved ignition the gas control valve opening mechanism is fitted with a delay (softlite). The gas control block is suitable for gasses from the first, second and third gas family. The maximum inlet pressure is 60 mbar. Figur 2 - Top view of the heater A) Hot water outlet B) Cold water inlet 1) Electrical connection 2) ON/OFF switch 3) Ignition controller reset button 4) Control thermostat knob 5) Safety thermostat reset button The automatic incandescent ignition (hot surface) ensures that the burner ignites as soon as there is a demand for heat. 1.2.2 Control panel Temperature control for the water heater is housed in the control panel (See figur 2). For safety purposes, heaters are always fitted with two thermostats: a control thermostat is adjustable between 40 °C and 80 °C and a safety thermostat 90 °C. The control panel is fitted with an ON/OFF switch (I/0). At setting ”I”, the gas control is activated on the basis of heat demand from the control thermostat. At setting ”0” the heater is switched off. 1.2.3 Operation of the storage water heater. Normal operation When there is a demand for heat a waiting period of about 1 second elapses before the built-in spark generator and pilot gas valve are switched on. The ignition sparks ignite the pilot burner and the resulting flame is detected by the ionisation electrode. Almost immediately after the pilot flame is detected, sparking stops and the main gas valve is openend. The main burner is lit by the pilot flame. The unit is now in operation. When the temperature of the water in the unit reaches the temperature that is set with the thermostat, the thermostat switches and disconnects the electrical heat demand signal to the burner controller. The gas valves are then closed. Ignition failure If the flame is not established within the safety period the automatic ignition controller locks out. The safety period is about 25 seconds. Lock-out is indicated by the lamp in the RESET- button on the control panel. The unit has to be manually reset by pushing the reset button. If the flame is lost during normal run, the automatic ignition controller repeats the start sequence. 1.2.4 Combustion products discharge safety device The heater has been fitted with a combustion products discharge safety device. It is the function of the safety device to prevent flue gases from the water heater entering the room where the water heater has been placed, instead of passing through the flue to outside atmosphere. The gas supply is disconnected as soon as the device is activated by hot gases flowing over the sensor. After the cause of the reentry of flue gases has been traced the device can be put back into operation by pressing its reset button. If this failure occurs frequently, this indicates that the flue suffers from down draught conditions. It is recommended that a competent person carry out the necessary remedial action. Important The combustion products discharge safety device should never be put out of operation. Reentry of flue gases to the building could be harmful and cause poisoning or death. 1.3 Technical information 1.3.1 Dimensions These water heaters are only suitable for a flue tube with minimal the announced diameter (dimension G). Dimensions BTI 85 BTI 100 A 1585 1780 B 1450 1640 D 645 675 F 770 775 G 130 130 K 340 340 L 355 370 M 1505 1685 N 1505 1685 P 210 210 R 285 285 S 1280 1460 V 410 410 1 Cold water inlet 2 Hot water outlet 3 Gas control 4 Drain valve 5 T&P relief valve tapping 6 Clean out All dimensions are given in mm. (rounded off on 5mm). See figur 3. AOS 1092 Figur 3 - Dimensions 1...

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