User manual JUNKERS WRD 18-2 G31

[. . . ] Installation Manual and Operating Instructions Gas Heaters miniMAXX WRD 11 -2 . G. . WRD 18 -2 . G. . 6 720 607 WRDG PT (05. 10) JS Table of contents Table of contents Safety information Explanation of symbology 1 1. 1 1. 2 1. 3 1. 4 1. 5 1. 6 1. 7 1. 8 1. 9 1. 10 2 3 3. 1 3. 2 3. 3 3. 4 3. 5 3. 6 3. 7 Technical Characteristics and Dimens. General Description Explanation of Model Code Accessories (Included with Appliance) Description of the heater Special accessories Dimensions Functional diagram of the heater Electrical diagram Function Technical characteristics Regulations Installation Important information Selection of the place of installation Heater mounting Water connection Hydrogenerator operation Gas connection Commissioning 3 3 4 4 4 4 4 4 5 6 7 7 8 9 9 9 9 10 10 10 10 10 4 4. 1 4. 2 4. 3 4. 4 4. 5 4. 6 5 5. 1 5. 2 5. 3 6 6. 1 6. 2 6. 3 6. 4 7 7. 1 Use Digital display - description Before starting up the heater Turning the heater on and off Water flow Power adjustment Temperature/flow adjustment Adjustments Heater adjustment Pressure adjustment Conversion to a different type of gas Maintenance Periodic maintenance work Startup after maintenance work Purge the appliance Flue gas safety device Problems Problem/cause/solution 11 11 11 11 11 12 12 13 13 13 14 15 15 15 15 15 17 17 2 6 720 607 WRDG Safety information Safety information If you smell gas: B Close the gas valve. B Go to a different location and call the gas supplier or an authorised technician. [. . . ] 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. 7 Green light on = Main burner on 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. Decreases flow and increases water temperature. 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 Maximum gas flow adjusting screw B Open various hot water taps. 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). Connecting the manometer B Unscrew the shut-off screws (Fig. 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. 6 Burner pressure 5. 3 Conversion to a different type of gas Only use the original conversion kits. [. . . ] The following chart offers solutions to possible problems (solutions followed by an * must be undertaken by qualified technicians only). Problem The heater does not ignite and digital display is turned off. Slow and difficult ignition of the burner. Solution Check switch position. Reduced water flow. Check and correct. Reduced water flow. Check and correct. [. . . ]