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Summary of Contents for elco Tudor NHREC
- Page 1 Gas Condensing Storage Water Heater Model : Tudor NHREC Installation & Operating instructions Code : L374 01-2021...
- Page 2 Thank you for choosing our condensing 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 center for electrical and electronic equipment or returned to the dealer, on the day of purchase of a new...
- Page 3 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 16. Do not store any type of object against the appliance. 17. For reliable and safe performance and warranty recognition, carefully follow the information in this manual and use only the spare parts and flue kits supplied by the Manufacturer. 18.
- Page 5 CEN/TR 1749 (2013) European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types) b. Installation Requirements It is the Law that all gas appliances are installed by competent persons (Gas Safe Registered), in accordance with the Gas Safety (Installation and Use) Regulations 1998 (as amended).
- Page 6 BS 8558 Guide to the design, installation, and maintenance of services supplying water for domestic use within buildings. Note: this document is complimentary to BS EN 806 BS 14743 Water conditioning equipment inside buildings. Softeners. Requirements for performance, safety and testing BS EN ISO 4126-1 Safety devices for protection against excessive pressure.
- 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 GENERAL INFORMATION DHW condensing 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 8 b. Characteristics Figure 1a - general layout Plan view Legend: Gas Inlet Combustion System Ignition Electrode Ionisation Electrode Combustion Chamber Concentric flue Air Inlet Flue Outlet Cold Water Inlet Pipe (1”M) Hot Water Outlet Pipe (1”M) Control & Limit Probes (T°C) Anodes (3/4’’F) Insulation Heat Exchanger Flue/Water...
- Page 9 General technical characteristics - see. Figures -1a & 1b: ➢ Enameled tank (Sanitary conformity according to standard BS EN 89 & WRAS) allowing operation with a maximum temperature of 95°C ; ➢ Rigid insulation in pre-lacquered steel A2 fire class ; ➢...
- Page 10 c. Technical Data NHREC NHREC NHREC Technical Specifications Unit Liters DHW Capacity: Heat input: 20.2 40.5 63.7 18.55 37.51 61.2 Heat output: Efficiency (Gross): 91.6 92.5 96.0 △ DHW Capacity Recovery Time ( T = 50 °C): 1052 △ Hot Water Production ( T = 50 °C): l/min 10.7...
- Page 11 d. Minimum dimensions and clearances Figure 2b - dimensions TOP VIEW Figure 2a - dimensions FRONT VIEW The figures 2 give the dimensions of the appliance and the minimum clearance to be NHREC observed for maintenance or dismantling: 1396 1711 1968 Figure 5 - Minimum clearances 1133...
- 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 & GAS a. Hydraulic Connection Refer to figures below 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. Figure 7.1 - NHREC Open vented system Figure 7.2 - NHREC Unvented system - optional cold water boosted supply Page 13...
- Page 14 Figure 7.3 - Two NHREC in parallel unvented Figure 7.4 - NHREC with buffer vessel unvented Page 14...
- Page 15 Legend : 1. Cold water mains supply 10. Re-circulating pump 2. Isolating valve 11. Hot water outlets 3. Strainer 12. Temperature & Pressure 4. Pressure reducing valve relief valve 5. Expansion vessel 13. De-Stratification pump 6. Non return valve 14. Buffer vessel loading pump 7.
- Page 16 ➢ Ensure that the setting of the pressure reducing valve does not exceed 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 17 The control sensor monitors the DHW temperature in the tank. As the temperature drops below the set-point value, the controller starts the ignition cycle and the burner starts. Once the flame is proved, the fan modulates to full power and the DHW temperature is raised. The temperature is continually monitored and the fan speed is reduced as the DHW reaches the set-point temperature.
- Page 18 Combustion Air Supply Products of combustion (fig 9.2) IMPORTANT Flue terminal locations must be in accordance with BS5440 Flueing and Ventilation of Gas Appliances of Rated Input not exceeding 70kW Net. For multiple appliance installations, reference should be made to technical documents BS6644 and IGE/UP/10.
- Page 19 Room Sealed Flue System with Separate Pipe for Combustion Air and Products of Combustion. Type C For specific guidance please contact Elco Heating Solutions. Diameters & Lengths of pipes - 1 elbow = 1 m ESL (Equivalent straight length) 20 / 40 / 65 Ø...
- Page 20 Elements available for configuration Depending on the flue type Chimney type B23 & B23P: Mandatory 100Ø Adaptor Mesh B23P 100Ø Vertical Terminal 100Ø Horizontal Terminal Depending on installation 100Ø 1000mm Length 100Ø 450mm Length 100Ø 250mm Length 100Ø Adj Length 300-500mm 100Ø...
- Page 21 Elements available for configuration Chimney type C33: Mandatory 100-150Ø Vertical Termination 100-150Ø Roof Flashing 100Ø Universal Support Depending on installation 100-150Ø 1000mm Length 100-150Ø 450mm Length 100-150Ø 250mm Length 100-150 Adj 300-500 or 500-800mm 100-150 45° Bend 100-150 90° Bend 100-150 Universal Collar Figure 9.5 - Flue installation C Note:- The combustion air supply and...
- Page 22 b. Ventilation It is important to ensure that an adequate supply of fresh air for general plant room ventilation is provided in accordance with BS5440 part 2, BS6644 & IGE/UP/10. c. Tips & Recommendations ➢ The appliance must be connected to the flue system using certified pipes that resist combustion products, condensates and temperature of at least 120C°.
- Page 23 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 5 amp.
- Page 24 11. INSTALLATION Before commissioning ensure that the installation is correct: ➢Correct Hydraulic connection ➢Tank under pressure and filled ➢Electrical supply polarity correct ➢Gas soundness ➢Correct installation of flue system ➢Correct installation of condense discharge system ➢Controls display correctly set-up a. Initial commissioning ✓...
- Page 25 9. Standby: after post-ventilation, the unit is in « STANDBY » mode until the next heat demand. b. Stop Refer to section 12e Instructions to be observed when the appliance is switched off without the need to produce DHW: b.1 – Normal (less than 3 months, without risk of frost) ➢...
- Page 26 REGULATION a. Presentation of the display 1/ Selection and validation button. 2/ Monochrome display. 3/Protection plate To allow access to buttons (4 & 5) lift plate 3 4/ R.A.Z button (restarts a cycle) 5/ USB connector (Commision) b. Main Logos: Operating error Burner in operation Indication of maintenance alarm or special mode...
- Page 27 c. Presentation of the Menu: The user menu consists of 4 tabs Tab 1 Not applicable Not applicable DHW temperature Not applicable Tab 2 Operating mode : Switching on/off Temporary: Manual recharging of the DW volume regardless of the time program Nominal set -point: DHW set-point temp Time program: Define the daily period for tank heating...
- Page 28 Then, using button (1), configure these parameters. Click on the button (1) to confirm. It is also possible to set the automatic switch to summer time. Turn the button (1) and click on the second panel to configure these parameters. To set the language, go to navigation pane 3 Configure the language selected with the Navigation pane...
- Page 29 When the device has successfully completed its ignition cycle, the following logo appears: To set the set-point temperature, go to tab 2. (It is imperative that the operating mode is « On ») Click on "Nominal set point" and set your value, click on button 1 to confirm. To return to the main menu, click on: f.
- Page 30 g. Device manual override: To put the device in manual override, go to tab 2. Then click on "Temporary". Define "Reload" and click on button (1) to confirm. The unit starts up until the nominal set point is reached, regardless of the set time range. Once the temperature is reached, the unit returns to its normal cycle.
- Page 31 i. Options: Competent or Qualified Person Only The unit has options that are disabled in the factory, they can be activated or de- activated by a competent/qualified person. Warning: Random modification of these options may lead to damage to the unit or endanger its users, so it is important to follow the instructions below.
- Page 32 Change settings: Select the title with button (1); Click Select the navigation pane; Click Title Select the parameter number; Click Navigation Change the value; Click to confirm pane To return: Parameter Click on return, number Go to the tab 4 And click on "Final user"...
- Page 33 l. Anti-frost The frost protection of the boiler is activated as soon as the boiler temperature falls below the frost protection set-point and thus the burner is put into operation. This instruction can be changed. Title: “Boiler" - Parameter: 2217: Anti-frost set-point, Set temperature. m.
- Page 34 UNVENTED APPLICATIONS a. Unvented kits Elco offer unvented kits to cover the range of NHREC 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 13.1, Figures. 13.2, 13.3, 13.4 & 13.5) so as to prevent the water temperature from exceeding 95°C.
- Page 35 Figure 13.3 - CWIC Series Valve Block 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 36 Figure 13.4 - safe discharge of pipes Figure 13.5 - safe discharge of pipes Secondary Circulation It is recommended that long dead legs are avoided and that a secondary re-circulation system is installed as shown in Figures 7.1 - 7.4. De-stratification Where there is no, or poor secondary re-circulation it is highly recommended to install a de-stratification loop utilising all components as would be installed in a secondary...
- Page 37 14. GAS CONVERSION These modifications must be carried out by authorised personnel The tank is preset to natural gas type G20 If you wish to change from G20 to propane G31 gas (and vice-versa for a specific reason, follow the procedure below using the settings detailed in figure 14.1 & table 14.2: •...
- Page 38 15. CLEANING AND MAINTENANCE The cleaning of the appliance will occasionally be required and should only be undertaken with a damp cloth. The manufacturer’s guarantee of the appliance is subject to the following recommendations. ☞ Monthly operation o Check that the PRV valve is functioning by using the lever. The valve needs to be clean of any impurities to ensure that water is correctly evacuated when in use and re-seats correctly.
- Page 39 Inspection of the burner Figure 15.1 - Burner & Fan Assembly Page 39...
- Page 40 Access the burner Loosen the 2 screws securing the control panel cover Removable Remove the cover Lower Detach the brace system and remove the cylinder lower cylinder case case Remove the fan assembly Remove the Ø4 red tube from the gas valve Disconnect the two unions on the gas inlet pipe and remove the pipe Support the fan assembly and remove the...
- Page 41 Do not forget to replace the holding pin for maintaining the burner! Before re-assembly check the condition of seals and replace where necessary. All joints should be checked for soundness Warning! d. Tips & Recommendations o Any inspection on the burner must be performed by a competent person. o After each intervention check the soundness of each element.
- Page 42 Illumination of the red LED indicates a failure in the protection of the tank (lack of water or a problem in the tank protection) and therefore requires a service inspection! The electrode is fragile. To avoid it’s deterioration observe the following torque on the nut M4 =>...
- Page 43 Important notes: Always use a competent person or authorised service technician to carry out any work on the appliance. To use natural gas instead of propane (and vice versa): ensure that the specific parts are obtained from the manufacturer and follow all the instructions. 18.
- Page 44 ERRORS: Code Error Description Recommendations Boiler temperature 1, Error on B2 probe Check the B2 probe sensor error DHW temperature 1 Error on B3 probe Check the B3 probe sensor error Check the tank Temperature limiter Safety thermostat temperature and reset the safety lockout opened thermostat.
- Page 45 19. SPARES Exploded Views Page 45...
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- Page 48 Spares identification Contact Elco Heating Solutions Spares Department and quote the appliance model and item number for price and availability. e-mail: spares @elco.co.uk Tele: 01268 546771 NOTES This section is left intentionally blank for notes: ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ………………………………………………………………………………………………………...
- Page 49 NOTES This section is left intentionally blank for notes: ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… Page 49...
- Page 50 ELCO UK 3 Juniper West, Fenton Way, Southfields Business Park, Basildon, Essex SS15 6SJ Tel: 01268 547600 Fax: 01268 88250 www.elco.co.uk Code: L374 03-2020...
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