Page 4
Installing the feeding system and pressure equalisation hose....53 Installing the cladding HDG Compact 25/35 ......55 Installing the cladding HDG Compact 45/50/65/80 .
Page 5
Operation Manual HDG Compact 25 - 80 - Content Checking and emptying the ash container ....... . .84 Lubricating the feeding system.
This Operating manual must be read and applied by everyone who EADING THE PERATING operates or works on the heating system HDG Compact 25 - 80. MANUAL We continuously develop and improve our boilers. The information ECHNICAL CHANGES in this edition was correct at the time of going to press.
Page 9
1 Notes on this manual – Glossary Term Explanation Heating system Comprised of boiler and corresponding accessories. Main switch Switches off the mains supply to the entire heating system. Rotary feeder Part of the feeding system - separates the combustion chamber from the silo and transport unit and acts as back-burn protection.
ROPER AND IMPROPER MANNER OF OPERATION The HDG Compact 25 - 80 heating system is designed for the URPOSE OF THE HEATING standard use of burning wood fuel products made from untreated...
3 Mode of operation – Overview 3 Mode of operation 3.1 Overview The version of the HDG Compact 25 - 80 heating system installed de- pends on whether the feeding system is to be fitted • on the right-hand side or •...
3 Mode of operation – Overview HDG C 25/35 OMPACT FRONT SIDE Figure 3/1 - Front side of the HDG Compact 25/35 boiler 1 Combustion chamber temperature sensor Control unit for HDG Control Touch 3 Heat exchanger cleaner drive 4 Flue gas fan...
3 Mode of operation – Overview HDG C 45/50/65/80 OMPACT FRONT SIDE Figure 3/3 - Front side of the HDG Compact 45/50/65/80 boiler 1 Combustion chamber temperature sensor 2 Control unit for HDG Control Touch 3 Heat exchanger cleaner drive 4 Flue gas temperature sensor...
3 Mode of operation – Functional description 3.2 Functional description VERVIEW OF HEATING SYSTEM The HDG Compact 25 - 80 heating system may contain the following components: Figure 3/5 - Overview 1 Delivery system 2 Feeding system 3 HDG Compact 25 - 80 boiler with HDG Control...
OMBUSTION PROCESS Figure 3/6 - HDG Compact 45/50/65/80 heating system When there is a need for heat in the accumulator the HDG Compact 20 – 80 automatically starts the “first filling” by loading fuel from the fuel store into the combustion chamber (8) via the feeding system (1).
OILER AND WEATHER COMPENSATED HEATING CONTROL ONTROL The boiler control unit HDG Control is the electronic hub of the OILER CONTROL boiler. It consists of the ready-to-use central and drive module and control unit on the front of the boiler. Using the control unit, you can regulate the boiler and call up information on the current process.
3 Mode of operation – Technical data 3.3 Technical data HDG C 25/35 OMPACT Boiler type Compact 25 Compact 35 Wood chips / pellets Wood chips / pellets Performance data (measured according to DIN EN 303-5) Nominal thermal power 31.0/26.0 kW 31.0/35.0 kW...
3 Mode of operation – Technical data HDG C 45/50/65/80 OMPACT Compact 45 Compact 50 Compact 65 Compact 80 Boiler type Wood chips / Wood chips / Wood chips / Wood chips / pellets pellets pellets pellets Performance data (measured according to DIN EN 303-5) Nominal thermal power 45.0 kW...
* maximum operating temperatures of up to 110 °C can also briefly occur. 3.4 Fuel quality requirements The heating systemHDG Compact 25 - 80 is designed for the standard use of burning untreated wood in the form of wood chips, pellets or shavings/pressed wood briquettes.
Page 26
Wood chips from category P45S HDG Compact 25 - 80 - as described above - can be used as fuel in all HDG wood chip boilers. For the HDG Compact 25/35, the maximum length of oversized particles is limited to 85 mm and 120 mm for the HDG Compact 45/50/65/80.
The diameter of the pellets used must be in accordance with the op- ENGTH AND DIAMETER eration of the HDG Compact 25 - 80 connected TBZ 90 with pellet suction system D06. When connected to another delivery system (e.g. HDG flexi blade delivery system, HDG hinged arm delivery system or HDG pellet delivery system PSZ), the diameter can also comply with D08.
3 Mode of operation – Fuel quality requirements RESSED WOOD BRIQUETTES For the HDG Compact 45/50/65/80, pressed wood briquettes can also be used as fuel. Pressed wood briquettes are pressed shavings, with or without various forms of additives, with a diameter of more than 25 mm.
3 Mode of operation – Fuel quality requirements the fuel classes 4 (wood chips), 5 (shavings), 5a (pellet) may be used in the HDG Compact 25 - 80 heating system and also for fuel classes 6 and 7 for the HDG Compact 45/50/65/80.
340 (DN40IG) Depth of boiler without attachments and ash removal Depth of boiler with attachments and 1100 1300 1300 ash removal Diameter of flue pipe connection Table 4/1 - Dimensions of flue gas pipe side HDG Compact 25 - 80 (mm)
(DN15 AG) Width of boiler without attachments and flue 1150 1150 1450 gas pipe connection Width of boiler with attachments and flue gas 2200 2110 2420 pipe connection Table 4/2 - Dimensions on back side, HDG Compact 25 - 80 (mm)
The refilling intervals should be kept as long as possible. The HDG Compact 25 - 80 heating system should be located so that the noise generated does not exceed the permitted values of DIN 4109 “Soundproofing in building construction”.
The required flue gas values are listed in chapter “3 Mode of op- eration”, section “3.3 Technical data”. The benefits of the HDG Compact 25 - 80 can only be reaped if all of the factors necessary for good combustion are carefully adjusted.
Page 35
Figure 4/4 - Connection to the chimney To compensate for irregularities in the flue draught of the chimney, HDG Bavaria recommends installing an auxiliary air unit in the flue gas pipe, or even better, in the chimney itself as shown in Figure 4/4...
4 Planning and installation – Connections The following should also be considered: • The connecting piece may not protrude into the chimney. • If the system flue gas pipe has a larger diameter than the chimney, the connecting piece must reduce its diameter to that of the con- nection.
Page 37
For this reason, the HDG Compact 25 - 80 is fitted as standard with power control and au- tomatic ignition. It is, however, highly recommended to use an accumulator even with automatic boiler systems.
Feeding system side and flue gas pipe side Cladding for pellet vacuum container Front and top Table 4/4 - Dimensions on back side, HDG Compact 25 - 80 (mm) x = included, o = optional • Feeding system (customer-specific) •...
The following figures and diagrams show the version of the heating system HDG Compact 25 - 80 with feeding system TBZ 150 on the left side of the boiler. Please keep this in mind if your version has a feeding system on the...
4 Planning and installation – Installing the heating system NSTALLING THE BOILER Caution! Danger from suspended loads The boiler weighs over 600 kg. If the boiler is dropped during trans- port, persons can be seriously injured and the boiler can be dam- aged.
Page 41
4 Planning and installation – Installing the heating system Undo the M8 (size 13) (2) nuts in the four corners of the boiler and press the M8 screws downwards. Figure 4/6 - Installation aid Push each of the square shafts (3) into the guides intended for them.
The boiler is erected. NSTALLING THE COMBUSTION FAN The combustion air fan is only available with the HDG Compact 45/50/65/80 boiler. Figure 4/8 - Installing the combustion fan Release the four 5 mm M6 hexagon socket screws (3) of the intake for the combustion fan on the air control unit.
4 Planning and installation – Installing the heating system NSTALLING THE MANUAL ASH REMOVAL Figure 4/9 - Installing the sealing plates Guide the sealing plate with the welded screw (3) through the opening (2) for the ash removal auger. On the opposite side, install the sealing plate (1) with the M10 (size 17) nut and M10 spring ring to the welded screw.
4 Planning and installation – Installing the heating system NSTALLING THE AUTOMATIC ASH REMOVAL SYSTEM HDG C 25/35 OMPACT NSTALLING THE ASH PLATES Figure 4/11 - Installing the ash plates Slide the ash plate (3) from the front on the feed side into the ash compartment of the combustion chamber.
Page 45
4 Planning and installation – Installing the heating system 10.Insert the second ash removal auger with the short shaft end (4) from the front through the opening (3) provided for this. OUNTING THE ASH REMOVAL MOTOR Figure 4/13 - Mounting the ash removal motor 11.Place the two feather keys (2 + 4) in the recesses provided for them on the auger shafts.
Page 46
(2). MOTOR 20.Connect the plug of the ash removal motor to the drive module. ✎ See “Electrical plans for HDG Compact 25 - 80”. OUNTING THE ASH REMOVAL DOOR Figure 4/15 - Attaching the ash removal door 21.Slide the ash removal door (5) onto the two ash removal...
23.If necessary, align the ash removal augers (1) with the screws of the ash removal door (2 + 4). ✓ The automatic ash removal system is installed. NSTALLING THE AUTOMATIC ASH REMOVAL SYSTEM HDG C 45/50/65 OMPACT NSTALLING THE ASH REMOVAL AUGER AND ASH WALKING...
Page 48
4 Planning and installation – Installing the heating system Fit the left (1) and the right (3) tray on the centre tray (2). Figure 4/19 - Installing the ash walking floor delivery system Fit the two moving ash floors (1 + 5) on the trays. Connect the two moving ash floors (1 + 5) by means of the bracket (3) with the M10 screws (17 mm).
Page 49
22.Lay the ash removal motor cable in such a way that it cannot con- ONNECTING THE ASH REMOVAL tact the drive chain. MOTOR 23.Connect the plug of the ash removal motor to the drive module. ✎ See “Electrical plans HDG Compact 25 - 80”.
4 Planning and installation – Installing the heating system OUNTING THE ASH REMOVAL DOOR Figure 4/22 - Mounting the ash removal door 24.Slide the ash removal door (5) onto the two ash removal augers (1). Important! The two ash removal augers must not come into contact with the ash removal door when installed.
Page 51
4 Planning and installation – Installing the heating system Bolt the crossbeams (1) onto the turbulators with the M12 (19 mm) screws (3) and allow about 2mm clearance between nuts and turbulator/crossbeam retainer. Lock the M12 nuts with the 19 mm M12 lock nuts. OUNTING THE CLEANING SHAFT LID Unscrew the two 19 mm M12 nuts on the hinges (2) of the...
Page 52
4 Planning and installation – Installing the heating system 10.Open the cleaning shaft lid (1). Figure 4/25 - Aligning the crossbeams 11.Align the crossbeams (2) centred to the boiler inner walls. Warning! Danger of injury The cleaning shaft lid is very heavy and can fall shut. Hands and arms can thereby be crushed.
16.Connect the plug of the heat exchanger cleaner to the central module. ✎ See “Electrical plans HDG Compact 25 - 80”. ✓ The heat exchanger cleaner is now installed. NSTALLING THE FEEDING SYSTEM AND PRESSURE EQUALISATION HOSE...
Page 54
4 Planning and installation – Installing the heating system NSTALLING THE FEEDING SYSTEM Warning! Danger of injury The feeding system is very heavy. Hands and feet could be crushed when it is lifted. Only lift the feed system using suitable lifting equipment. Figure 4/28 - Attaching the feeding system Slide the second seal (5) onto the adapter pipe (4).
ONNECTING THE FEEDING it on the cladding. SYSTEM 21.Connect the plug of the feeding system to the drive module. ✎ See “Electrical plans HDG Compact 25 - 80”. ✓ The feeding system and the pressure equalisation hose are now installed. HDG C...
Page 56
Fasten the front cladding (3) on the boiler with the M10 (size 17) (2) nuts and M10 washers. Insert the cover plate (4) for the level indicator in the front clad- ding (3). Thread the connection cable for the control unit HDG Control Touch through the recess (1) in the front cladding.
Page 57
4 Planning and installation – Installing the heating system NSTALLING THE CORNER SUPPORTS Figure 4/34 - Installing the corner supports and connecting plates Install the connecting plate (2) on the flue pipe side between the front cladding (1) and the corner support (5) using the M6 hex- agon sockets screws (size 4).
Page 58
4 Planning and installation – Installing the heating system NSTALLING THE CONNECTING PLATE Figure 4/36 - Installing the middle connecting plate 11.Install the middle connecting plate (1) between the front cladding (1) and the upper rear cladding with the M6 hexagon sockets screws (size 4).
Page 59
4 Planning and installation – Installing the heating system Figure 4/38 - Installing the side cladding on the feed side at the top 15.Hang the upper side cladding (2) on the feed side with the pre-as- sembled M6 Hexagon socket screws (1) (size 4) to the connection plate.
Page 60
4 Planning and installation – Installing the heating system Figure 4/40 - Installing the side cladding on the flue gas pipe side at the top 20.Hang the upper side cladding (3) on the flue side with the pre-as- sembled M6 Hexagon socket screws (1) (size 4) onto the front and rear cladding.
Page 61
31.Connect the HDG Touch wiring according to the circuit diagram. ✎ See “Electrical plans HDG Compact 25 - 80”. 32.Hang the upper front panel (5), with the HDG Touch control at- tached, onto the front cladding using the pre-assembled M6 hex- agon socked screws.
35.35.Place the top panel on the feed side (1) on the connecting plates. ✓ The cladding is installed. HDG C 45/50/65/80 NSTALLING THE CLADDING OMPACT The cladding packets are numbered chronologically. The number also corresponds to the order in which the cladding part is needed.
Page 63
Fasten the front cladding (3) to the boiler with the M10 (size 17) (2) nuts and M10 washers. Insert the cover plate (4) for the level indicator in the front clad- ding (3). Thread the connection cable for the control unit HDG Control Touch through the recess (1) in the front cladding.
Page 64
4 Planning and installation – Installing the heating system NSTALLING THE CORNER SUPPORTS Figure 4/48 - Installing the corner supports Slide the two corner supports (1 + 2) behind the circuit board as- sembly plate (3). Figure 4/49 - Installing the outer connecting plate Install the connecting plate (1) on the flue pipe side between the front cladding and the corner support using the M6 hexagon sockets screws (size 4).
Page 65
4 Planning and installation – Installing the heating system NSTALLING THE UPPER REAR CLADDING Figure 4/50 - Installing the upper rear cladding Install the upper rear cladding (1) between the two corner sup- ports with the M6 hexagon socket screws (size 4). NSTALLING THE CONNECTING PLATE Figure 4/51 - Installing the middle connecting plate...
Page 66
4 Planning and installation – Installing the heating system 12.Attach the lower side cladding (2) on the feed side to the rear corner support with the M6 hexagon socket screws (5) (size 4). 13.Screw the M6 hexagon socket screw (4) (size 4) loosely into the side cladding so that the rear cladding can be attached later.
Page 67
4 Planning and installation – Installing the heating system 18.Fasten the lower side cladding (5) on the flue side to the front cladding using the M6 Hexagon socket screws (4+6) (size 4). 19.Secure the lower side cladding (5) to the rear corner support using the M6 Hexagon socket screws (1+3) (size 4).
Page 68
27.Hang the upper rear cladding (1) on to the preassembled M6 hex- agon socket screws. 28.Open cladding packet “4”. NSTALLING THE FRONT CLADDING 29.Install the control unit HDG Control Touch (1) with the spacers (2) in the cladding panel (3) with the washers and M4 screws (size 7).
Page 69
M6 hexagon socket screws. 34.Connect the HDG Touch control wiring in accordance with the wiring diagram. 35.Hang the cladding panel (5) with the HDG Touch attached onto the front cladding with the pre-assembled M6 hexagon socket screws.
4 Planning and installation – Installing the heating system 37.Screw the two side parts (2 + 3) to the middle part (1) using the M6 hexagon socket screws (size 4). Figure 4/60 - Installing the top covers 38.Place the assembled sides and top (3) over the cleaning mecha- nism onto the connecting plates.
4 Planning and installation – Installing the heating system Screw the DN40 nipple (5) into the flue gas pipe connection with a pipe wrench. Place the lambda sensor (4) in its ceramic disc onto the DN40 nipple (5). Fasten the lambda sensor (4) to the DN40 nipple by screwing the nut (3) down onto the ceramic disc.
Connect all plugs on the central unit (1) and drive module (3) and, if necessary, the expansion module(s) in accordance with the cir- cuit diagram. ✎ See “Electrical plans HDG Compact 25 - 80”. Connect all cable channels (2). ✓ The modules are wired up.
4 Planning and installation – Installing the heating system Push the ash container (2) on to the ash removal pipe. Press the clamp handle (1) downwards. ✓ Hold the clamp handle and press the ash container against the seal of the ash removal door. If the handles do not clamp, adjust them as follows.
“3.3 Technical data”. The modules must be connected in accordance with the circuit dia- gram. ✎ See “Electrical plans HDG Compact 25 - 80”. 4.8 Water Important! The heating system must be filled with water in accordance with VDI guideline 2035, “Avoiding damage in hot water heating sys-...
The thermal safety device is to be inspected annually by an author- ised, qualified technician to verify that it is functional. The thermal safety device must be installed according to guidelines from HDG Bavaria. Important! In order to prevent leaks, avoid turning the connections of the safety heat exchanger anticlockwise when installing the thermal safety device.
Page 76
4 Planning and installation – Thermal safety device HDG C 25/35 OMPACT Figure 4/67 - Installing the thermal safety device HDG Compact 25/35 1 Connection of immersion sensor for thermal safety device (DN 15, inside thread) 2 Thermal safety device (TAS)
5 Commissioning the system The heating system will initially be commissioned by specialists from HDG Bavaria GmbH or an authorised HDG partner. The commissioning includes an introduction to the operation and maintenance of the heating system as well as performing measure- ments on the system to determine exhaust emissions and firing per- formance.
• Any unused inputs are bypassed. 5.2 Procedure Important! Commission the HDG Compact 25 - 80 heating system in accord- ance with the specifications from the supplied commissioning pro- tocol. ✎ See also operating manual “HDG Control”, Chapter “4 Commis- sioning the system”.
6 Using the heating system – Control unit HDG Control 6 Using the heating system 6.1 Control unit HDG Control ✎ You can find all information and instructions for setting up and operating the boiler and weather-compensated heating control HDG Control in the operating manual “HDG Control”.
6 Using the heating system – Performing a chimney sweep measurement ROCEDURE FOR FILLING WITH PELLETS Switch the heating system off. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. ✓ The heating system is now switched off.
PARE PARTS Only use genuine HDG spare parts. You can obtain HDG spare parts from your specialist heating company. 7.1 Cleaning and servicing schedule The specified cleaning intervals are guidelines.
7 Cleaning and servicing the heating system – Requirements 7.2 Requirements ENERALLY APPLICABLE SAFETY INSTRUCTIONS Please be sure to observe the following generally applicable safety instructions when performing any cleaning or maintenance work: Warning! Danger of asphyxiation due to carbon monoxide If the boiler is in operation, carbon monoxide can be emitted through open doors, lids or other cleaning openings.
✎ See the “HDG Control” operating manual, chapter “6 Parameter HDG Compact 25 - 80” section “6.2 Boiler” paragraph “Test”. After cleaning, close the combustion chamber door (2) and the front door (1) of the boiler.
Page 85
HECKING AND EMPTYING THE ✎ ASH PAN MANUAL ASH See the “HDG Control” operating manual, chapter “5 Using the REMOVAL control unit”, section “5.3 Switching off the heating system”. Allow the fire in the heating system to burn out and cool down.
Page 86
(3) in the boiler in the reverse sequence. 14.Repeat the process for the second ash container. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.2 Switching on the heating system”. ✓ Inspection and emptying of the ash containers has been com-...
Switch the heating system off. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Allow the fire in the heating system to burn out and cool down. Turn the main switch off.
Install the covers (1 or 3 + 5) in the reverse sequence. Re-starting the heating system. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.2 Switching on the heating system”. ✓ The heat exchanger cleaner is now lubricated.
Page 89
Replace the lower cladding of the boiler. 10.Re-starting the heating system. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.2 Switching on the heating system”. ✓ The check of the drive chain of the ash removal system is com- pleted.
Page 90
Mount the chain guard (2) back on the feeding system. 10.Re-starting the heating system. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.2 Switching on the heating system”. ✓ Checking the feeding drive chain is completed.
Remove the cover (4) of the heat exchanger cleaner. In manual mode move the turbulators to the lowest position. ✎ See the “HDG Control” operating manual, chapter “6 Parameter HDG Compact 25 - 80” section “6.2 Boiler” paragraph “Test”. Turn the main switch off.
Page 92
7 Cleaning and servicing the heating system – Requirements Figure 7/12 - Folding out the cleaning shaft lid Release the star-grip screw (2). Release the two middle M12 hexagon socket screws (SW10) (1). 10.Open the cleaning shaft lid (3). Figure 7/13 - Pulling out the turbulators 11.Pull out the turbulators on the crossbar shafts (1) in an upward di- rection.
7 Cleaning and servicing the heating system – Requirements ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.2 Switching on the heating system”. ✓ The cleaning shaft and the turbulators have now been cleaned.
Switch the heating system off. ✓ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Allow the fire to burn out and cool down.
Switch the heating system off. ✓ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Allow the fire to burn out and cool down. Turn the main switch off.
Switch the heating system off. ✓ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Allow the fire to burn out and cool down. Turn the main switch off.
Page 97
7 Cleaning and servicing the heating system – Requirements Switch the heating system off. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Allow the fire to burn out and cool down.
“5.2 Switching on the heating system”. ✓ The cleaning of the ignition fan is completed. LEANING THE FLUE GAS FAN The flue gas fan is only available with the HDG Compact 25/35 boiler. Important! ✎ Observe the “Generally applicable safety instructions” in this sec- tion.
Switch the heating system off. ✓ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Allow the fire to burn out and cool down. Turn the main switch off.
Page 100
7 Cleaning and servicing the heating system – Requirements ✓ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Turn the main switch off. Figure 7/22 - Dismantling the level indicator Open the front door (1).
If no signage is visible contact the installation com- pany. Switch the heating system off. ✓ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Turn the main switch off. Open the access hatch.
The heating system can be dismantled as follows. Switch the heating system off. ✎ See the “HDG Control” operating manual, chapter “5 Using the control unit”, section “5.3 Switching off the heating system”. Allow the boiler to burn out and wait until the message Off ap- pears in the display.
8 Notes on dismantling and disposal – Disposal 8.2 Disposal The following components are made of steel and can be recycled via a local recycling centre. • Boiler without motors • Cladding • Feeding system without motor • Transfer station without motor •...
Need help?
Do you have a question about the Compact 25 and is the answer not in the manual?
Questions and answers