User manual JUNKERS WRD 18-2 G31

[. . . ] Information to the client B Inform the client about how to operated and handle the heater. B Inform the client that no independent modifications are permitted. Explanation of symbology The safety instructions which appear in the text have a grey background and are identified in the margin by a triangle surrounding an exclamation mark. The warnings used indicate the degree of risk in case the precautionary measures are not complied with. · Caution is used to indicate the risk of minor material damage. [. . . ] · Must be mounted a protection wind/rain in the extremity of the evacuation pipe. Caution: Ensure that the extremity of the evacuation pipe is placed between the ledge and the ring of the flue. 3. 2 Selection of installation the place of Requirements regarding the place of installation · Do not install the heater in rooms with a volume of less than 8 m3 (not including the volume of the furniture providing this does not exceed 2 m3. · Assemble the gas heater in a well-ventilated location where it will not be exposed to temperatures below zero and in a place where there is an evacuation pipe for combustion gases. 5, item B), so as to avoid any possible mis-connection. 3. 6 Gas connection Any local by-laws and regulations pertaining to installation and use of gas-heated appliances must be observed. Please refer to the laws that should be attended in your country. 3. 7 Commissioning B Turn on the gas and water cocks and check all connections for leaks. B Check flue gas safety device good functioning, proceed as explained in section 6. 4. 10 6 720 607 WRDG Use 4 Use i Open all water and gas blocking devices. Purge the pipes. 4. 3 Turning the heater on and off , position . Turning on B Press the switch Caution: The front panel in the burner and pilot burner area may reach high temperatures, with risk of burning in case of contact. 4. 1 Digital display - description Fig. 6 1 2 3 4 Digital display Temperature/error code Malfunction indicator Temperature measurement units Heater in operation (burner turned on) 4. 2 Before starting up the heater Caution: B Initial startup must be performed by a qualified technician who will provide the client with all the necessary information for optimum operation of the gas heater. 8 Turning off B Press the switch , position . 4. 4 B Check if the gas indicated on the rating plate is the same as the one used at the location. B Open the water valve. Water flow If the red LED starts flashing, check the water pressure. Fig. 9 6 720 607 WRDG 11 Use 4. 5 Power adjustment Lower water temperature. 11 4. 6 Temperature/flow adjustment B Turn anti-clockwise Increases flow and decreases water temperature. Fig. Regulating the temperature to the minimum required value reduces energy consumption as well as the possibility of limescale deposits in the heat exchanger. Caution: The temperature on the display is not precise, always check before bathing children or elderly people. 12 6 720 607 WRDG Adjustments 5 5. 1 Adjustments Heater adjustment Sealed elements must not be opened. Maximum gas flow adjustment B Remove the seal from the adjusting screw (Fig. B Turn on the heater with the power selector set to the left (maximum position). i Natural gas Heaters for natural gas (G 20) are supplied sealed from the factory after being adjusted to the values indicated on the rating plate. i Heaters must not be turned on if the connection pressure is lower than 15 mbar or higher than 25 mbar. Liquefied gas Heaters for propane/butane (G31/G30) are supplied sealed from the factory after being adjusted to the values indicated on the rating plate. Danger: The following procedures must only be performed by a qualified technician. It is possible to adjust the power using the burner pressure process, although a manometer is necessary for this procedure. Fig. 14), regulate the pressure until achieving the values indicated in the table 6. B Seal the adjusting screw once again. 5. 2 Pressure adjustment Accessing the adjusting screw B Remove the front part of the heater (see 3. 3). B Connect the manometer to the burner pressure measuring point. Fig. 13 Pressure measurement point 6 720 607 WRDG 13 Adjustments Minimum gas flow adjustment i The minimum gas flow adjustment is performed automatically after the adjustment of the maximum gas flow. Natural gas H Butane 8708202113 (1, 10) WR11 8708202124 (1, 20) 8708202113 (1, 10) 8708202128 (0, 72) 8708202128 (0, 72) 8708202132 (0, 75) 8708202130 (0, 70) 8708202132 (0, 75) Propane 8708202130 (0, 70) Injector code WR14 8708202116 (1, 25) 8708202115 (1, 15) WR18 8708202116 (1, 25) Connection pressure (mbar) WR11 WR14 WR18 WR11 MAX (mbar) WR14 WR18 20 30 37 12, 7 12 10, 3 28 28 25, 5 35 35 32, 5 Tab. [. . . ] Reduce the water temperature using the power and/or temperature adjustment selector. Check and correct connection. Flue gas safety device has tripped (digital display shows "A4"). of the Water temperature sensor has tripped (outlet water temperature above 85 °C). sensor incorrectly Digital display shows "A7". Temperature sensor defective. [. . . ]