Summary of Contents for OSO HOTWATER OSO TERMO PLUS-E
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TERMO ELECTRIC BOILER INSTALLATION MANUAL OSO TERMO PLUS - E The company reserve the right to alter size, shape and specification without prior notice page 1 TMS-UT-0804-Z01-4...
7. CENTRAL HEATING CONTROLS ADVANCED MENU..............16 8. FAULT FINDING GUIDE........................18 9. AFTER SALES SERVICE INFORMATION ..................20 10. TECHNICAL DATA......................... 21 11. OSO HOTWATER UK LTD......................21 12. APPENDICES ..........................21 12.3 – A 3 - T PLUS E .........................21...
TERMINOLOGY USED IN THIS MANUAL The central heating boiler water circuit is called primary 1. Introduction Thank you for purchasing the Oso Termo E electric central heating boiler. To ensure a correct and safe installation and economical use, please read these instructions thoroughly before installation.
Plus – E Technical Data For Plus E Boilers Power Boiler Expansion Dimensions Maximum Connection Power supply Weight primary BSP male Capacity vessel operating Litres L/bar pressure MPa (bar) 10.8 8 / 0,8 34.5 0,25 (2,5) ¾” 240V N ~ 50/60 Hz 14.4 2.2 Expansion Vessel Characteristics Maximum...
For exact list of parts see figure and table below. If parts damaged missing, please consult OSO Hotwater UK Ltd. Contents included within delivery Item Quantity Description TERMO boiler Instructions for electrical / plumbing installation, user guide and warranty card...
4.3.1 Select position for boiler The boiler should preferably be installed on the lowest point in relation to the installation. This ensures that elements are always immersed in water and there is no danger of burning out. When positioning the boiler, ensure there is adequate surrounding space to allow for pipe connection, ventilation, servicing and replacement of components.
4.4 Plumbing & Heating installation & commissioning 4.4.1 Installation To avoid draining the entire primary system during boiler maintenance it is recommended that isolation valves are fitted to the flow and return pipes immediately below the boiler. Connect the primary flow and return pipes for the central heating system to the labelled connections on the boiler. Connect the mains water supply via a filling loop to the charge and discharge valve on the boiler incorporating a stop valve and double check valve which must be left disconnected after commissioning.
4.5 Connection to the electrical mains supply Before working with the appliance, turn off the power supply (MCB) and secure against restart. This device must be earthed. Check that the electrical supply to the building has sufficient current and voltage to supply the boiler and other appliances to be used.
4.6 Connection plate for control equipment, temperature sensor & pump External controls (Programmer, thermostats, pump, zone valves) must be supplied with power from the green boiler connections plate. See diagram (right) via removable connector as shown below Terminals DOMESTIC WATER, 3 HW ON & HW PUMP are not used.
5. Setting up Boilers Switch boiler on Test the RCD switch by pressing T button on it. Reset the RCD switch. Plus - E – Space heating with outdoor temperature compensation 5.1 Control Panel (including fault finding indicators) 1. Display Default display is of current primary temperature inside the boiler.
5.2. Choose type of heating (radiator or under floor heating) Factory default is for radiators. To change to under floor heating, follow instructions below. 1. Disconnect from mains supply 2. Remove front cover of boiler. 3. Remove perspex control panel cover (prize off with screwdriver down channels at either side) 4.
5.3. Activating system and programming central heating Off mode - The boiler is connected to the electrical supply but the RCD switch (page 12) is off Standby mode – the RCD switch is on but the central heating on/off and dhw switches on control panel are off On mode –...
5.3.1 Heating curves explained. Heating curves take information from the outside temperature sensor and decides on the required primary temperature in the heating system to maintain the desired internal temperature based on the insulation properties of the building. The colder it is outside, the higher the temperature needed in the heating system. •...
Offset Offset Conditions experienced Curve selection (radiator heating) (UFH heating) Room temperature is too low if the external Lower curve by 0.1 Add with offset Add with offset temperature is above + 5 Room temperature is too low if the external Leave the curve Add with offset Add with offset...
7. Central heating controls advanced menu. Please note that the following information provides full details on the options available for Termo boilers. In most installations the factory settings do not require alteration. Instructions for reading current or desired temperatures are shown in blue. Instructions necessary for standard installations are shown in red.
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Continuation... Display of external temperature Press key (6) down and release to see external temperature. The Display shows the external temperature. The value is shown for 5 s, after >5 sec which display reverts to show actual temperature of water in the boiler. <5 sec Offset of currently selected heating curve (see part 3.5.3 page 13) Press key (6) down and hold for 5 seconds to enter offset curve selection menu...
8. Fault finding guide FAULT FINDING Please check the following before going through fault finding flowchart. Check the installation is correct. The boiler is not All isolating valves are open. operating or radiators The system is full of water (pressurised) and purged of air.
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Please check the following FAULT FINDING before going through fault finding flowchart. Check the installation is When switched on, correct. switches on control All isolating valves are open. panel show the The system is full of water voltage, however the (pressurised) and purged of boiler does not heat air.
Please check the following before going through Fault RCCB switch cannot finding chart. be switched ON Check the installation is correct. All isolating valves are open. The system is full of water (pressurised) and purged of air. Programmer and controls outside of boiler are on.
Termo boilers into different central heating systems. Advice is given for a variety of standard systems commonly used in the UK, however the list is not exhaustive and OSO Hotwater UK Ltd cannot guarantee that the advice will be correct for any particular system.
BASIC USAGE SAMPLE FOR CENTRAL HEATING With Termo Plus – E electric boiler up to 14.4kw N-50/60Hz and up to 36 kw 415V 3 N-50/60Hz 12.3.2 Wiring diagram Termo plus-e The company reserve the right to alter size, shape and specification without prior notice page 22 TMS-UT-0804-Z01-4...