Buderus boiler service manual

Buderus is a brand present in 50 countries and 3 continents with main manufacturing sites in Germany and US.

Buderus boilers by way of Bosch Commercial and Industrial Heating Group provides gas and oil condense boilers, wall hung boilers , floor standing boilers, h eat distribution unit reliable in commercial and industrial functionality and low in cost.

Uniquely for commercial and industrial solutions all traditional heating solutions can be combined with the solar thermal technology. The output rage starts at 78 kW and goes up to kW for commercial and kW for industrial solutions models which are provided with a standard 2 year warranty. Buderus boilers company has a reputation of reliable commercial and industrial boilers manufacturer.

When speaking to sales representative you will need to provide information about size and purpose of your real estate, number of floors, insulation grading, type of isolation if any, desired functionality- hot water and heating or just one solution. Operate the boiler only as intended and when it is in perfect condition 2. Read the users manual carefully Buderus system boilers operation Proper water need to be filled into the Buderus boiler system. Buderus boiler maintenance and annual service In order to assure proper economical functionality low fuel consumption and high level operational reliability your boiler should be serviced annually.

You will also maintain the highest level of environmentally responsible combustion Fault finding Heating system and hot water faults are indicated in the control unit display. Table 1.

Fill and bleed the heating system. Open a thermostatic valve. Replace the primary circulation pump. Open the servicing cocks. Replace the supply and return sensor.

Replace the cable loom or the affected part thereof. Restore the plug-and-socket connection. Replace the gas valve. Replace the UBA 3. Display code. The UBA 3 does not register any connections to the unused contacts 78 and The system pressure is too low. The primary circulation pump does not generate a pressure difference. Try to undo the jam or replace the primary circulation pump.

Replace the supply cord. Clean the circulation pump inside. Connect the expansion tank to the return conduit. Clean the pressure sensor. Temperature increase of supply sensor or safety sensor is more than 7. The air fan has failed during the operating phase. Reconnect the plug-and-socket connection of the blower.

Replace the tacho wire. Have the electrical system tested. The blower is switched off during the safety test. Fully switch off the heat request and check that the blower is still operational after 1 minute.

Replace if necessary. The blower is running too slowly. Clean or replace the blower. The blower is running too fast. Deal with blockage. Take the second blower out of service.

Replace the blower. C A The UBA 3 does not register the short cut between the unused contacts 22 and The sensor test has failed. Replace the safety sensor. The safety sensor contact is interrupted. The supply sensor contact is shorted.

C U The return sensor contact is shorted. The supply sensor contact is interrupted. C Y The return sensor contact is interrupted. No ionization after four startup attempts. Contact the gas utility company to ensure that no nitrogen remains in the gas tank or gas supply pipes.

Bleed the gas supply pipe. Replace the hot surface ignitor. Fit the correct gas orifice. An ionization current was measured before the burner start. For example, this includes our heat pumps and hybrid systems, which use renewable energies and reduce CO2 emissions.

Do you have any questions? You can call our free advice hotline between 7 a. Do you want to write to ask questions about our products or to give positive feedback or suggestions for improvement? Welcome to Buderus. A brand with history and an innovative future.

The safety instructions always precede the individual tasks. Read the safety instructions carefully before carrying out the tasks described below. The result of ignoring safety instructions can be severe injury or even death, as well as damage to property and the environment.

Logamatic controls are used to control and monitor heating systems in detached and terraced houses. The Logamatic controls can be used to check and set the room and DHW temperatures and to select and set heating programs. All safety instructions in these service instructions are identified by the danger sign. A signal word is positioned below this sign, which indicates the level of danger. Always observe the measures prescribed to reduce the risk of danger.

User notes help you use and handle this technology in the optimum, most economical, safe and environmentallyfriendly manner. Press the "Display" key and "Install" key at the same time to call up the service level see Chapter "Keys for extended functions", page Heating circuit 2 installation parameters mixed heating circuit 4. Burner relay 1 stage 2, modulation output 2. Remove rear top panel of the boiler by first unscrewing 2 screws at the rear edge, then sliding rear panel backward to disengage the hooks.

Insert the two front feet of the control into the holes provided on the top of the boiler. Then, firmly push down on the rear of the control until it snaps into place. The sensor bundle consists of one thermistor FK , two capillaries and a spacer. Mount the sensors per the following boiler specific instructions. Use the chrome well supplied with the Logamatic. The sensor bundle must be fully inserted into the Logamatic well. Remove spacers from the chrome well on the boiler. Remove outer sleeve from one capillary.

Insert both capillaries and thermistor into the chrome well together with Honeywell capillary. G : The tridicator assembly should be moved to the supply piping and replaced with the chrome plated Logamatic well.

The sensor bundle must be inserted into this well. All the wires should be routed through the cable raceway at the rear of the boiler. If using conduit install a Logabracket page The rear panel jacket may be modified per local code. Route the wires on top of the insulation from the back of the boiler to the back of the controls. Use the white strain relief brackets provided to lock all cables into place on the back of the control.

Replace the top housing of the controls and fasten the two screws. The control is ready to be placed into operation. The Logabracket is designed to create strain relief for your line voltage and low voltage wiring for the Logamatic controls.

The bracket is mainly designed for use with the G, G, GB and GX boilers, but with minor modifications can be used on other boiler models as well. Line the bracket up with holes, place the Logamatic in place over the holes and secure with screws provided. Four conduit connections are provided for line voltage wiring; a slotted opening is used to run low voltage sensor wiring.

It is necessary to bend down the tabs on the rear jacket panel to prevent interference between bracket and jacket panel.