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Summary of Contents for Giersch GNTS 21
- Page 1 Technical information - Installation instructions GNTS 21/ 31 Issue February 2023 Low-temperature boiler Subject to technical changes in the interest of product improvement!
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Page 2: Table Of Contents
Table of contents Safety instructions Work on the heating system General information Product features Installation room / boiler room Check water level Corrosion protection Maintenance Technical information Guidelines and standards Warranty Intended use Technical specifications Important components Technical data Dimensions Space requirement Hydraulic integration Installation... -
Page 3: Safety Instructions
Safety instructions General Notes 2.1 Product features • Please read these installation instructions carefully before starting the installation. • Compact design in the power range of 21 and 31 kW • All liability and warranty claims are void for damage caused by non-observance of these •... -
Page 4: Check Water Level
Guidelines and standards 2.3 Check water level Please observe the following guidelines and • Please check the water level of your heating standards for the installation and operation of the system regularly on the manometer (on heating system: site). If necessary, fill up with water slowly - do not fill cold water into the heated system. -
Page 5: Warranty
The firing system must be configured in recommended for roof heating centres. such a way that a control shutdown It must be installed in accordance with the Giersch occurs at least every 24 hours. hydraulic circuit diagrams (see chapter 5). When... -
Page 6: Technical Details
Technical Details 4.1 Important components Air vent connection G 3/4 Heating flow G1 Flue gas connection NW 130 Heating return G1 Drain Mains switch Fuse Weather-regulated control... -
Page 7: Technical Data
4.2 Technical Data GNTS Product ID no. CE 2456 Cl 101 Nominal heat load 32,7 Nominal heat output Standard utilisation factor (DIN 4702-8) Flue gas loss Standby loss 0,45 =Water-side resistance ΔT 20 k mbar Boiler water content Combustion chamber volume Combustion chamber diameter Combustion chamber length Flue gas resistance... -
Page 8: Dimensions
4.3 Dimensions The dimensioning does not take into account the height of the levelling legs of min. 25 mm! Dimension GNTS 21 Dimension with door insulation panel 4x M8 Dimensions with burner cover Connections 1 Air vent connection G 3/4... - Page 9 Dimension GNTS 31 Dimensions with door insulation panel Dimensions with burner hood 1077 Connections 1 Vent connection G 3/4 2 Heating flow G 1 3 Flue gas connection NW 130 4 Heating return G 1 5 Drain G 1 6 Accessories...
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Page 10: Space Requirement
4.4 Space requirement Please observe the installation instructions and planning information. Place the boiler on a boiler pedestal (accessory) or on a plinth (possibly on a low storage tank). The ground clearance achieved in this way ensures optimum operation and adequate protection of the system. -
Page 11: Hydraulic Integration
Hydraulic integration (design examples) When installing the boiler GNTS, please also refer to the instructions in the Hydraulics chapter (page 5) System NT No. 1: 1 direct heating circuit Heating circuit controller Giematic 2M Optionally with or without domestic hot water preparation Boiler safety block Sensor, remote control and room unit Heating circuit group HG-E... - Page 12 System NT No. 2: 1 mixed heating circuit Heating circuit controller Giematic 2M Optionally with or without domestic hot water preparation Sensor, remote control and room unit Boiler safety block AF Outdoor sensor AF 200 Heating circuit group HG-ME KF Boiler sensor KVT 20/2/6 Overflow insert (to be ordered FB Room unit RS separately)
- Page 13 System NT No. 3: 2 heating circuits 1 direct heating circuit and 1 mixed heating circuit Heating circuit controller Giematic 2M Optionally with or without domestic hot water preparation Sensor, remote control and room unit Boiler safety block AF Outdoor sensor AF 200 Heating circuit group HG-ME and HG-E KF Boiler sensor KVT 20/2/6 Overflow insert (to be ordered...
- Page 14 System NT No. 4: 2 mixed heating circuits Heating circuit controller Giematic 2M plus Optionally with or without domestic hot water preparation Boiler safety block Sensor, remote control and room unit 2 heating circuit groups HG-ME or HG- AF Outdoor sensor AF 200 KF Boiler sensor KVT 20/2/6 Overflow insert (to be ordered FB Room unit RS...
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Page 15: Installation
Installation 6.2 Flue gas connection The flue gases must be routed outside and 6.1 Burner mounting protected against cooling in such a way that flue gas condensation in the flue gas system cannot Only burners that are certified by the lead to damage. -
Page 16: Boiler Control Panel Controls
6.3 Operating elements Boiler control panel Mains switch Fuse 6.3 A For protecting all control and switching elements. To replace the fuse, turn the screw cap anti- clockwise while applying slight pressure. (clarify cause) Before replacing the fuse, the system must be disconnected from the power supply! Safety temperature limiter STB... -
Page 17: Installation Of Rezi Tube
6.4 Reciprocating tube installation (only for • Slide the rezi tube (1) with the bayonet GNTS 21) catch (2) over the fastening rivets (3), turn anti-clockwise and lock. Attention: • Check for tight fit. The rezi tube is optional and not included in the... -
Page 18: Start-Up
Start-up Start-up may only be carried out by a licenced specialist company. • Check the pre-pressure of the membrane pressure expansion vessel - see the manufacturer's instructions. • Make a hose connection between the filling line and the boiler filling and draining tap (on site). -
Page 19: Boiler Control Panel Connection
7.2 Connection Boiler control panel • Disconnect counter plugs for sensors, mains, pumps and any mixers etc. and connect the corresponding connection cable. For plug assignment, see the back of the control panel or point 7.3 page 19 "Electrical connection on the boiler control panel". •... -
Page 20: Electrical Connection Boiler Control Panel20
7.3 Electrical connection boiler control panel The system must be cut off from the power supply before starting work. The pipes must not touch any hot boiler parts or parts of the flue gas system. 14 15 16 17 19 25 18 22 23 24 Mains connection Sensor/data bus connection... -
Page 21: Adjusting The Flue Gas Temperature
7.4 Requirements for the exhaust system 7.5 Adjustment of the flue gas temperature • The GNTS21/31 is operated with low If the flue gas temperature after commissioning is exhaust gas losses, i.e. with a low flue gas not sufficient for an existing, unrenovated temperature and low excess air chimney, the flue gas temperature can be (= high CO... -
Page 22: Design Of The Inspection Opening
7.6 Design of the measuring opening Before measuring emissions, the flue gas pipe must be checked for leaks! If there is a leaky flue gas duct, secondary air is drawn in. This leads to an incorrect measurement (recognisable by the too low measured value of the CO emission and soot formation) and thus to an... -
Page 23: Maintenance And Decommissioning
Maintenance and shutdown 8.2 Checking the system Regular maintenance of the heating unit must be • Put the boiler into operation. carried out (once a year). • Check the function of all control and safety This may only be carried out by a specialist. We devices. -
Page 24: Commissioning Protocol
Commissioning protocol Please tick the work carried out or enter the measured values Attachment Installation company Check fuel supply/feed lines, check for leaks Check exhaust gas routing Tighten burner fastening screws Check electrical connection Carry out flue gas measurement Control Customisation Boiler temperature Exhaust gas temperature... -
Page 25: Exploded View
Exhaust gas regulator for GNTS 21 03-90-34543 Exhaust gas regulator for GNTS 31 03-90-25312 Door insulation, bottom for GNTS 21 03-90-34540 Door insulation, bottom for GNTS 31 03-90-55252 Recirculation insert for boiler door for GNTS 21 47-90-12655 Rezi attachment R1-LN-K65 for GNTS 21... -
Page 26: Boiler-Specific Components
10.2 Boiler-specific components Position Art. No. Designation 03-90-25318 Exhaust gas box for GNTS 21 03-90-34545 Exhaust gas box for GNTS 31 03-90-25319 Gasket, exhaust box for GNTS 21 03-90-34546 Gasket, exhaust box for GNTS 31... -
Page 27: Switch Panel Components
DIN ISO Position Art. No. Designation 07-90-52456 Sensor and burner cable accessory set 03-90-36425 Switch panel panelling for GNTS 21 03-90-36426 Switch panel panelling for GNTS 31 07-10-53779 Giematic 2M 07-10-53375 Giematic 2M Plus Accessories Controls and sensor installation kits Position Art. -
Page 28: Panelling Components
10.4 Cladding components Position Art. No. Designation 03-90-32654 Front panelling, insulated for GNTS 21 03-90-34552 Front panelling, insulated for GNTS 31 03-90-32023 Side panel right/left for GNTS 21 03-90-34548 Side panel right/left for GNTS 31 03-90-32691 Mounting bracket connection for GNTS 21... -
Page 29: Declaration Of Conformity
11 Declaration of Conformity GIERSCH EC Declaration of Conformity Enertech GmbH Manufacturer: Burners heating systems Adjutantenkamp Address: D-58675 Hemer Type, design: Low-temperature boiler GNTS Low-temperature boiler GNTS declare manufacturer: correspondingly labelled products fulfil the requirements of the listed directives standards. - Page 30 Subject to change without notice. Enertech GmbH - Burners and heating systems Adjutantenkamp 18 - D-58675 Hemer - Phone 02372/965-0 - Fax 02372/61240 e-mail: info@giersch.de - Internet: http://www.giersch.de...
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