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4. Close the stop valve (11) in the hot water pipe. 5. Close the stop valve (4) between the cold water head tank and the cold water inlet. 6. Open the drain valve (9). 7. Bleed the appliance (or installation) so that it drains completely. Instruction manual BFM 6 Draining gis Instruction manual BFM gis 7 The control panel 7.1 Introduction Topics covered in this chapter: • Control panel; • Explanation of icons; • ON/OFF switch; • Control thermostat; • Burner control reset button. 7.2 Control panel The figure shows the control panel. The control panel IMD-0462 R0 The control panel comprises: • an ON/OFF switch with status lamp; • a reset button with status lamp; • a control thermostat with rotary knob; • two status lamps. 7.3 Explanation of icons The table explains the meanings of the icons. Icons and their meaning Name Explanation ON/OFF Switch ON mode / OFF mode Reset button with error status Resets burner control Temperature control For setting water temperature (Tset) 7.4 ON/OFF switch The ON/OFF switch sets the appliance in ON mode or OFF mode. In OFF mode the appliance is still electrically live. This ensures that the frost protection is active. Note To electrically isolate the appliance, you must use the isolator between the appliance and the mains power supply. 7.5 Control thermostat Use the rotary knob of the control thermostat to set the desired water temperature between ± 40°C and ± 70°C. The range is continuous and is labelled 1 through 4. The table shows the temperatures corresponding to the numbers on the knob. Temperature settings Position Temperature 1 ± 40°C 2 ± 50°C 3 ± 60°C 4 ± 70°C Instruction manual BFM 7 The control panel gis 7.6 Burner control reset button An error in the appliance can cause a lockout of the burner control. When this happens, the reset button lamp will be lit. Once the cause of the error has been rectified, you can reset the appliance using the reset button. Note Never use the reset button until you have rectified the error. Many errors (11 "Troubleshooting") can be identified according to the appliance status (8 "Status of the appliance"). Instruction manual BFM gis 8 Status of the appliance 8.1 Introduction Topics covered in this chapter: • Operating modes; • Error conditions; 8.2 Operating modes When running, the appliance has three basic operating modes, namely: • ELECTRICALLY ISOLATED In this mode, the appliance is off and no components are live. The isolator (switch between the appliance and the mains power supply) is off. On the control panel: -the ON/OFF switch is at position 0; -the green light is dimmed. • OFF In this mode, the frost protection is activated. The isolator is at position I. On the control panel: -the ON/OFF switch is at position 0; -the green light is lit. • ON In this mode, the appliance continuously responds to the heat demand. On the control panel: -the ON/OFF switch is at position I; -the water temperature can be set using the rotary knob of the control thermostat (7.5 "Control thermostat"); -the green light is lit. 8.3 Error conditions When the appliance is in an error condition, the heat demand is (temporarily) ignored, and you cannot draw hot water. The frost protection is also out of action. The error conditions are divided into three groups: • Lock out errors of the burner control In this event, the red error light will be lit in the reset button on the control panel. The burner control is in lockout. Once the cause has been rectified, the reset button must be pressed to restart the appliance. • Cycling of appliance In this case, the appliance continuously attempts to start, but there is an error that prevents the heating cycle from completing successfully. Once the cause has been rectified, the appliance will restart automatically. • Blocking errors You can recognize this condition when the appliance makes no attempt to start the heating cycle, despite the fact that the water is colder than the temperature set with the control thermostat (7.5 "Control thermostat"). These errors disappear automatically once the cause of the error has been removed, after which the appliance resumes operation by itself. The cause of the error is not shown on the control panel. For a comprehensive overview of errors, refer to troubleshooting. (11 "Troubleshooting") As an end user, if you find the appliance in an error condition, you can attempt to start the appliance running by pressing the rest button once. However, if the error returns or occurs several times in a short time, you must contact your service and maintenance engineer. Instruction manual BFM 8 Status of the appliance gis Instruction manual BFM gis 9 Starting and running 9.1 Introduction Topics covered in this chapter: • Starting the appliance; • The appliance's heating cycle. 9.2 Starting the appliance Start the appliance as follows: 1. Fill the appliance (5 "Filling"). 2. Open (3.5 "Installation diagram") the manual gas valve. 3. Switch on the power to the appliance using the isolator betwee...

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