Subscribe to Our Youtube Channel
Related Manuals for elco Tudor NHREX
Summary of Contents for elco Tudor NHREX
- Page 1 HIGH EFFICIENCY LOW NOX Model : Tudor NHREX Installation & Operating instructions Code : L375 01-2021...
- Page 2 Thank you for choosing our high efficiency, low Nox hot water heater to ensure your domestic hot water production. Please retain the device’s operating instructions in a safe place for future reference. PRODUCT CONFORMING TO EU DIRECTIVE 2012/19/EU The crossed-out wheeled bin symbol on the appliance indicates that the end-of-life product, to be treated separately from domestic waste, must be returned to a waste sorting centre for electrical and electronic equipment or returned to the dealer, on the day of purchase of a new...
-
Page 3: General Recommendations
RECOMMENDATIONS a. General Recommendations 1. This manual forms an integral part of the appliance. It is to be kept safe and accessible for consultation if necessary and must accompany the appliance in case of transfer to another owner or user and / or transfer to another installation. 2. - Page 4 14. If the appliance is out of service for more than one month, close the hydraulic circuits, connected to the water heater and drain the appliance. If the appliance is left unused in winter for a long period in an unheated space, it is advisable to drain it completely to avoid any risk of freezing.
-
Page 5: European Directives And Standards
a. European Directives and Standards Directive 90/396/CEE as amended by 2009/142/CE Gas appliances ; Directives 2009/125/EC (ErP) & 2010/30EU (Energy Labelling) Directive DESP 97/23/CE Pressure equipment ; BS EN 89 (2000) Devices for the production of hot water by storage for sanitary uses using gaseous fuels ;... - Page 6 BS 6644 Specification for the installation and maintenance of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net). BS 6880 Part 1, 2 & 3 Code of Practice for low temperature hot water heating systems of output greater than 45kW.
- Page 7 CONDITIONS FOR APPLICATION OF THE MANUFACTURER’S WARRANTY Standard and current terms of warranty are detailed on our web site www.elco.co.uk Page 7...
-
Page 8: General Information
GENERAL INFORMATION DHW high efficiency gas low NOx hot water heater. With a very simple and flexible operation, you can always dispose of hot water at the desired temperature and the desired flow (within the limits of the capacity of the appliance) while respecting the (regulatory) thermal and environmental issues. -
Page 9: Technical Characteristics
Figure1 - general layout Plan view General technical characteristics (see. Fig.-1a & 1b above): ➢ Enameled tank (Sanitary conformity according to standard BS EN 89) allowing operation with a working temperature up to 95°C ; ➢ Durable padded vinyl jacket over dense thermal insulation material ; ➢... -
Page 10: Technical Data
c. Technical Data Technical Specifications Unit NHREX 18 NHREX 26 NHREX 36 NHREX 60 DHW Capacity: Litres Heat Output: 18.7 27.8 36.1 51.5 Heat Input: 22.0 32.0 42.0 60.0 Gross Thermal Efficiency: 86.9 85.8 △ DHW Recovery Time ( T = 50 °C): △... - Page 11 d. Minimum dimensions and clearances Legend : 16. Hot water outlet G1” 17. Cold water inlet G1” 18. Flue spillage sensor (DAT) 19. Control panel 20. Instruction label 21. Inspection port 22. Nameplate 23. Warning label 26. Combustion chamber cover 27.
- Page 12 e. Packaging / Storage / Transport / Unpacking Each unit, after factory checks and tests, is packaged in a wooden box and stored in a warehouse with optimum conditions for delivery. This appliance must be stored in a covered, frost-free room with high and low ventilation. When it is transported, it must be fixed vertically and strongly in its original packaging until the place of installation.
-
Page 13: Hydraulic Connection
HYDRAULIC CONNECTION & GAS a. Hydraulic Connection Revert to Figures 7.1 - 7.4 to visualise the schematics of some of the main features to link the hydraulic connections. The correct installation of the tank is the responsibility of the installer. Ensure that each unit and the associated pipe work are suitably earthed. Legend : 1. - Page 14 Figure 7.3 - Two NHREX in parallel unvented Figure 7.4- NHREX with buffer vessel unvented Page 14...
- Page 15 ➢ Ensure that the setting of the pressure reducing valve does not exceed the maximum working pressure of the water heater. ➢ Install a cold water inlet valve group (option supplied by Elco) incorporating non return valve, pressure relief valve and pressure reducing valve ➢...
- Page 16 ☞ The hot water outlet situated the tank is a 1’’ connection on top of Add an automatic air vent (AAV) on the hot water outlet and as close as possible to the tank. Do not increase the diameter of the hot water outlet pipe, as larger diameter pipes increases heat losses.
-
Page 17: Flue Systems & Ventilation
before being filled and used. If an installation is not flushed and/or if the water is not of the right quality, it may invalidate the manufacturer’s warranty. Refer to ICOM document Water Quality Consideration of Domestic Hot Water Systems for Commercial Applications. The water must comply with the regulations for drinking water for human consumption. - Page 18 appliance draught diverter and must be installed in accordance with the requirements of BS 5440: Part 1, BS 6644 or IGE/UP/10 as appropriate. The complete flue system must be designed so as to safely evacuate the products of combustion from the appliance. The flue pipe should rise for at least 500mm vertically from the draught diverter connection before any change in direction.
-
Page 19: Electrical Connection
10. ELECTRICAL CONNECTION Wiring external to the appliance must be in accordance with the I.E.E. Wiring Regulations and any Local Regulations which apply. Wiring must be completed in heat resistant cable of 1.0mm cross sectional area. The heater is supplied for connection to a 230volt, 50 Hz, A.C. Single phase. Fuse rating is a 3 amp. -
Page 20: Installation
Note - the NHREX 18 has self energising controls and only requires an electrical supply to support the integral Protech electronic anode system. A permanent electrical supply is required to ensure that the Protech system is energised and protecting the tank. 11. - Page 21 (= pilot flame). Turn the knob (1) to switch from adjustment ● (=stop) to regulation Fully press the knob (1) for 20 seconds. Ignite the pilot burner by repeatedly pressing the piezo lighter (2), keeping the gas valve button (1) pressed down fully. Allow the thermocouple to heat while keeping the control button (1) pressed.
- Page 22 Table 12.1- Unvented kits a. Unvented kits Elco offer unvented kits to cover the range of NHREX water heaters. If the installation is to be of the “unvented” type, the cylinder will have been supplied with a kit of safety controls (loose) which must be installed (see table 12.1, Figures.
- Page 23 connections provided for the connection of the T&P valve and the expansion relief valve must not be used for any other purpose. The mains water supply pressure must not exceed 25bar. The T & P valve must be installed on the hot water outlet on the top of the appliance.
- Page 24 2 Expansion Vessel pre-charge Pressure It is the responsibility of the installer to check the air pre-charge pressure before installation and adjust as necessary to 3.5bar. 3 Expansion Vessel Capacity The capacity of the expansion vessel supplied as part of the unvented kit, is nominally sized to accommodate the capacity of the cylinder with which it was supplied plus a nominal system pipework volume of approximately 17.5% of the cylinder capacity.
-
Page 25: Gas Conversion
Figure 12.5 - safe discharge of pipes Secondary Circulation It is recommended that long dead legs are avoided and that a secondary circulation system is installed as shown in Figures 7.1 - 7.4. De-stratification Where there is no, or poor secondary circulation it is highly recommended to install a de- stratification loop utilising all components as would be installed in a secondary circulation system. - Page 26 To do this: o Close the gas by the stopcock. o Switch off the power supply o Remove the burner o Disconnect the pilot tube and replace the pilot injector (NHREX 18), o Change the burner injectors & replace the sealing washers, On the NHRE X 18, it is necessary to adjust the pressure downstream of the gas valve with a manometer pressure gauge or a column of water.
- Page 27 Figure 13.5 - NHREX 18 Burner assembly Figure 13.6 - NHREX 26-60 Burner assembly Page 28...
-
Page 28: Cleaning And Maintenance
14. CLEANING AND MAINTENANCE The cleaning of the appliance will occasionally be required and should only be undertaken with a damp cloth. The manufacturers guarantee of the appliance is subject to the following recommendations. ! Monthly operation o Check that the security valve is functioning by using the lever. This valve needs to be clean of any impurities and ensure that water is correctly evacuated when in use. -
Page 29: Cleaning The Combustion Chamber
o Unscrew the two screws securing the burner, lower the burner and pull it horizontally from the combustion chamber. Note:- Take care so as not to damage the pilot assembly o Check the condition of the burner flame strips o Check the condition of the injectors o Check the condition of the pilot assembly, electrodes (NHREX 26-60) and thermocouple (NHREX 18) and clean where necessary o Check the function of the piezo igniter ensuring a spark is present (NHREX... -
Page 30: Protech Anti-Corrosion System
d. Tips & Recommendations o Any intervention on the burner must be performed by a competent person. o After each intervention check the soundness of each element. To do so, it is recommended to use a leak detection fluid. o The gas soundness can be validated up to the injector outlet. 15. -
Page 31: Fault Finding
✓ Do not store any type of object against the appliance ✓ Follow these instructions carefully and only use original spare parts from the manufacturer where possible, in order to maintain longevity and the guarantee ✓ Do not tamper any manufacturer sealed components. Important notes : Always use a competent person or authorised service technician to carry out any work on the appliance. - Page 32 18. SPARES Page 33...
-
Page 33: Exploded View
Exploded View Page 34... - Page 34 Page 35...
- Page 35 Spares identification Description NHREX Model 0100 Front case Part No. 0105 ✓ ✓ ✓ ✓ Thermostat tube 60003215 0111 ✓ ✓ ✓ ✓ Gasket inspection flange 343356 ✓ ✓ ✓ ✓ 0112 Inspection flange kit 60002751 ✓ ✓ ✓ ✓ 0113 Fixing brackets top cover 60003194...
- Page 36 Description NHREX Model 0200 Flue assembly 0207 ✓ 397784 Draught diverter assembly ∅ 125 ✓ 397788 Draught diverter assembly ∅ 140 ✓ 397764 Draught diverter assembly ∅ 170 ✓ 397765 Draught diverter assembly ∅ 180 0300 Burner assembly 0311 Burner manifold 60003152 ✓...
- Page 37 Description NHREX Model 0400 Gas section 0401 ✓ Gas valve 60003161 ✓ ✓ ✓ Gas valve 60003192 0402 ✓ ECO thermocouple interrupter 340081 0403 ✓ Gas supply pipe 338476 0404 ✓ Main burner jet - G20 60003163 ✓ Main burner jet - G31 60003165 ✓...
- Page 38 NOTES This section is left intentionally blank for notes: ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… Page 39...
- Page 39 ELCO UK 3 Juniper West, Fenton Way, Southfields Business Park, Basildon, Essex SS15 6SJ Tel: 0345 646 0442 Fax: 01268 88250 www.elco.co.uk Code: L375 03-2020...
Need help?
Do you have a question about the Tudor NHREX and is the answer not in the manual?
Questions and answers