6. 9. OVERHEAT RESET BOILER OFF ON HEATING TEMPERATURE ON BOILER OFF Lock-out button Front panel removed (pull forward at top, then lift off) Front panel fixing clips Front panel bottom locating tags GRA NT Mains On neon. To maintain a longer and more consistent hot water temperaturethe factories fitted a flow restrictor  to all Grant models (Vortex Combi 36 and  Combi Max are the only exceptions) The purpose of flow resistor is to  reduce the flow rate to 15 litres/min. To ensure proper operation water pressure from incoming mains should be at the 1-8 bar level. 6. To reset the overheat thermostat, unscrew the small plastic cap marked “overheat reset” (see Figure 1-1), press the button and If this condition continually repeats, contact your service enigneer. Check flue is clean and unobstructed – rectify as necessary. Wait till the boiler to cools down before the button will reset. Fit a replacement valve using the reverse of the above procedure, ensuring that the sealing washer provided is correctly fitted in the valve union before tightening. It is not a Combi boiler and happens at anytime of the day/night. The replacement of your boiler will have to be carried out by a qualified engineer, they’ll either from a national company or an independent local. After locating it, thaw the blocked or frozen pipe by simply putting the hot water. To remove difficult marks and stains, use a wet cloth first and then and finish with a dry cloth. Cookies When the store switch is set to OFF position, the burner will not fire in order to maintain the water temperature. No special material needed. If you’re not sure what it means, take a look through our comprehensive list of Grant error codes. }These will not be lit until activated 6. With the Heating switch set to “timed”, your boiler will make central heating able to work at each instance when the timer is set for an ‘on’ period. 4. Re-assemble in reverse order  and refill the central heating system. Has anyone … 8. The smarter way to find approved boiler engineers in your area. We recommend to set the temperature to maximum in order to assure optimal hot water supply. SWITCH RESET REFER TO WIRING DIAGRAM IN MANUAL Test Boiler Boiler Overheat thermostat switch On/Off switch thermostat reset button (under screw cover) Boiler front ‘Lock-out’ reset button panel removed Controls for External modules - Fig. Taking out insurance can be done with your energy supplier but there’s absolutely no obligation to do so. 2. Note: The pressure shown on the system pressure gauge is not the air charge pressure in the vessel. Safety switches will switch the burner off whenever there’s a burner malfunction in your appliance. The boiler will not light until the thermostat is reset. To reset, unscrew the small plastic cap (see Fig. Pay special attention to the flue terminal not getting blocked by large piles of snow during the wintertime. Our guide to Grant warranties will provide everything you need to know. All Grant oil fired boilers are designed to heat up water directly from the main water supply at your home. It appears the Domestic hot water pump won't switch off even when no hot water taps are in use. Unscrew the two other unions 11 and 12 on the mixing valve, and remove valve from the boiler as shown on the picture. And now to the point of my post. Remove the vertical 15 mm pipe from the boiler to gain access to pipe union 6. Take a note of what fuel is suppose to be used (label on the inside of case side panel). Always call a Gas Safe registered engineer and get it checked out, just in case. BURNER Power to the burner for it to operate. Page 5: Notes About your fuel must not be obstructed. Ideal Logic Combi - User’s 3 Legend a. Pre-heat On/Off B. DHW Temperature Control C. CH Temperature Control D. Mode Control E. Boiler Status F. Burner ‘on’ Indicator G. Pressure Gauge h. Condensate Drain J. 9. The boiler is capable of a maximum flow temperature of 75° C. 1 - INTRODUCTION 1.1 How a condensing boiler works 1.2 Heating system design considerations To achieve the maximum … 2.Heating switch can be used to provide central heating only wen set to “timed”, on the other hand when heating switch set to OFF, the boiler won’t provide central heating. When it comes to getting quotes we don’t recommend going with the first one you receive, instead aim to get as many as 3. We match Place an absorbent cloth below the pump before removing the head to catch the water, and avoid placing any strain on the electrical cable. Draining should be performed by qualified boiler specialist. ‘Lockout’ Indicator- RED. • Pressure Gauge (Kitchen/Utility System models only) This is to … Any ideas what the … Slacken the four control panel fixing screws, carefully disengage the control panel from both casing side panels and the front top panel and allow it to rest at an angle on its right hand end, 5. Check for 230 V output from BURNER LIVE terminal of PCB. In practice it means that your boiler needs to be installed and commissioned by a person having proper qualifications (Oftec registered technician), Before using the boiler, after each restart and repair following steps should be considered. To ensure that the hot water performance is not reduced first thing in the morning, or in the evening if the heating is off through the day, set the heating timer to switch the heating on at least 30 minutes before hot water will normally be required in the morning (or evening). Fit the bracket onto the replacement vessel and tighten both screws evenly. 26 Nov 2008 #13 DGOBS said: Ok, as its a grant boiler, I will assume it's either a RDB riello or a g3-g5 riello When you depress the reset button, the burner will run (on pre-purge) for 12 … 9. For everyday cleaning simply use a dry cloth. If required, the fuel supply valve may be closed and the water and electricity supplies turned off at the mains. To reset, unscrew the small plastic cap press the button then replace the cap. Note: The time on the internal 7-day or 24-hour timer may need to be reset after a power failure. Indicating low system pressure, have bled rads and water … Faults with your Grant boiler are displayed as an error code on the display screen. Grant Combi, Grant Multi Pass, Boiler thermostat and/or overheat thermostat faulty, Burner not lighting, oil & electricity present at burner, Reset burner air        damper and check combustion, Burner fires but smoke visible from flue or high smoke number, Insufficient combustion air supply to burner. 3. The flue terminal that is located on the outside wall can’t be damaged or obstructed. Boilers are normally extremely reliable and provide our homes with heating and hot water whenever we call upon them. Try Boiler Guide today! 5. BURNER Power to the burner for it to operate. to boiler) must be checked annually to ensure that there is a 1.0 bar air charge in the vessel. For long periods: Set the On/Off switch to OFF and switch off the … The system will need be recharged to values somewhere between 0.5 and 1 bar. Normally those malfunctions are short lived. Page 6 TEST SWITCH Open valve (situated above pump in front of boiler). As part of the terms of the warranty, you’ll need to arrange an annual Grant boiler service to keep it valid. The boiler won’t light until the thermostat is reset. To access the controls, open the lower … The Grant Combi 90 MkII limit thermostat or also know as the overheat thermostat is To stop the boiler from firing too often, aqua stats have a high limit temperature and a low limit. Check switch continuity, replace if faulty, Diverter valve microswitches not operated. BOILER ON/OFF SWITCH 1.Store switch can be used to manually turn off hot water produce is not needed. Drain the central heating system and boiler using the drain cock on the boiler. OVERHEAT Boiler overheat thermostat has operated and switched the boiler off. Take a look at the table below to see how much you could be saving depending on your current boiler rating and property. Periodically check that they are clear. The boiler will not light until the thermostat is reset. All taps and mixing valves used in the domestic hot water system must be suitable for operating at a mains pressure of up to 8 bar. Broken diaphragms and airlocks, failure of motorised valves, issues with the thermostat or low water levels, Most likely to be a broken internal component but it will depend where the water is leaking from, Air in the system could be causing this, otherwise it could be that the water pressure is too low, Could be a water leak in the system, the pressure relief valve needs replacing or due to recently bleeding radiators, This fault should be displayed on your boiler as an error code or warning notification, Thermostat could be turned off or not set to the correct settings (time etc. your requirements with pre-screened companies to ensure you’re only contacted by trusted & For long periods: Set the On/Off switch to OFF and switch … The control panel is fitted with an ON/OFF switch, boiler thermostat control knob and the manual reset button for the overheat thermostat. To restart, simply set the switch to ON. • System Pressure Gauge (Internal System models only) This is to indicate the … – close the valves either side of the filling loop and disconnect the loop. 5. Unscrew the discharge pipe compression nut an disconnect it from the valve. Grant boilers require a 230/240 V ~ 50 Hz  power supply and it needs to be protected by a 5 Amp fuse. Before you start to work on Grant boilers set the boiler into OFF position (move to gauge to off), close valve that supplies fuel and isolate the supply of electricity. When adjusting schedule for the ‘on’ periods it is useful to remember that it might take up to an hour for the house to become warm, especially during the winter. The boiler thermostat has set to operate at a range  75°C – 85°C. Ensure that the mixing valve is correctly connected, i.e. Reconnect the flexible hose, ensuring that the sealing washer is correctly fitted in the union before tightening. In instances where your the heating system loses pressure frequently you should inform your installer  in order to investigate the possible cause. OVERHEAT Boiler overheat thermostat has operated and switched the boiler off. How to re-pressurise the system by adding water? How to maintain your Grant boiler Limit Indicator - RED. Burner not firing for hot water (after a short time). Messages 1,749. Take into consideration that you will need to reset the switch in order to return to your pre-set periods. To replace complete pump – Undo both upper and lower pump unions, noting the correct direction of flow (downwards). Close the primary return isolating valve  (B) and the pump isolating valve  as shown on the picture above. Attention!This appliance must be earthed. The boiler will not light until the thermostat is reset. The boiler will not light until the overheat thermostat is reset. 6. Don’t use abrasive pads or cleaners. Check hot and cold       inlets are connected correctly. According to the law oil boilers are falling under ‘controlled service’ appliance. Only show branches with stock available now. However, never use the boiling water, as it will damage the pipe. In instances when pressure exceeds 8 bar reducing pressure valve usage is recommended.The boiler may still operate down to a pressure of 1.0 bar but with a reduced flow rate. The central heating boiler will also fire (regardless of thermostat state) when the boiler water temperature moves below a range around the low limit, making certain the appliances water temperature range remains above a certain … 6. Gain General Access -unhook the expansion vessel from the front of the boiler and lay to one side. … read more. accredited professionals. 5. If your home is installed with a Grant boiler, we’ll be taking you through some of the most common problems you might come across and how to get the boiler going again. Boiler Parts.co.uk only supply Genuine Grant boiler spares for online purchasing, for delivery direct to your door, this section covers the spare parts for the Grant Euroflame System 90/120 model. You can find flow restrictor inside of the cold water inlet of the isolator valve (placed on the outside of it). It’s primarly funtion is to lead the central heating system. Check if your appliance is equipped with frost protection (optional), whenever it is not the case it is recommended to leave the boiler on with the boiler thermostat set at a low setting, instead of switching off the boiler. 5. In those instances reset button will bring back normal operation. It’s a good idea to keep an eye on your boiler’s pressure gauge quite often, because low boiler pressure can lead to your central heating system failing to function properly. Remove the spring circlip holding the microswitch (4) assembly to the diverter valve (1), and separate the microswitch assembly from the valve. Check electrical    continuity of pump microswitch. Quantity Add to order Check stock availability. Can someone point me in the right direction please. Grant Vortex External modules … Insufficient oil flow to burner due to restriction in supply line. Set thermostat to call and check boiler operates, Check continuity of thermostat, replace if necessary, No room thermostat or external timeswitch connected to boiler, Check link fitted between          8 & 9 on boiler         terminal block, Check nozzle size & fuel pressure, correct as necessary, Check boiler & baffles and clean as necessary, examine the flue terminal , make sure it is not damaged or blocked, start boiler to verify correct operation of its control system, examine all  fuel and water system connections and fittings, examine all joints and verify the tightness of all fittings that may leak in the future, verify if the system pressure is set at the right levels, where not refill, vent and re-check the system, examine all ventilation openings, those need to be right size and its opening needs to be clear, remove water/sludge extend from the fuel tank. Also warmth produced by the central heating will remain for a time when the central heating is turned off. Take a note of what fuel is suppose to be used (label on the inside of case side panel). Not all Grant oil fired boilers are suitable for use with a sealed system, check if that is the option on your user manual. Warning! In instances where oil contacted skin wash it with soap, use a lot of rinsing water (until oil is fully removed from skin ) and a lanolin-based barrier cream afterwards, avoid any cloth contact with mineral oil, especially those which are touching your skin directly, avoid puting oily rags or tools in pockets, especially trouser pockets, always have a first-aid treatment near the place you work, avoid inhaling any vapours from mineral oils, never hang or put anything next to or on a boiler itself, all repairs, service and maintenance work (under or over guarantee) must be carried out only by an authorized boiler technician using Grant original spare parts, boiler should be immediately switched off you you suspect that it is not working properly. Re-assemble in reverse order  and refill the central heating system, 4. We had one guy come to look at our heating system in general, and he saw the problem occur, and suggested that the pump may be on its way out due to its a… E&OE. If your boiler goes off and you try to light it but nothing happens and the 'Lock-out' reset button on the burner is not lit, the overheat thermostat has probably operated. Undo one screw, remove the cover from the electrical terminal box and disconnect the pump from the electrical cable. Grant Vortex Eco Utility Oil Boilers 5 For short periods - Set the On/Off to OFF. VAT Inc. VAT. To restart, simply set the switch to ON. Terms & conditions 3. Burner on Indication - ORANGE. • Overheat Thermostat (Overheat Reset) The boiler is fitted with a safety overheat thermostat which will automatically switch off the boiler in the case of a control malfunction causing overheating. 8. Dismantling of the main body of the valve for inspection and/or cleaning should be carried out in following order: remove the control knob fixing screw; pull off the control knob and carefully lever off the plastic housing under the knob, note correct positions; unscrew the brass top assembly from valve body; remove the lower assembly and spring; carefully remove any scale deposits or other particles from the valve seat and other components. *According to the latest figures from the Energy Saving Trust. 3. Step 5: Check the fault code. using a suitable pressure gauge. Check for 230 V at boiler terminal block. The maximum temperature of the central heating water is 85°C for the Combi V3 and Combi Max and 80°C for the Vortex Combi models. Hi All , My first post so please be gentle!. Don’t try to repair the fault yourself, instead contact an OFTEC registered engineer as soon as possible. Boiler cold water and hot water connections reversed. Grant Spares Catalogue NI Mar 2015:Layout 1. Check flue draught and improve flue as necessary. Certain repairs needs to be obtains due to wrong fuel used. 5. OP, what type of boiler do you have? Most Grant boilers come with a 3 year warranty, but they can extend to as long as 5 to 10 years when they’re installed by a G-One accredited installer. This build-up, can restrict the flow of water within the heat exchanger causing the water to overheat, steam and boil. Gain General Access- unhook the expansion vessel from the front of the boiler and lay to one side. When required, a shower may be fitted in the domestic hot water system. A leak could happen for one of many reasons but it tends to indicate that an internal component has broken, normally a seal or valve. Contact your installed to agree on a service date. Unscrew and disconnect pipe unions 1, 5 & 9 as shown on the picture. Warning! Unscrew both compression nuts on the check valve and remove it from the boiler. That way you know that you’re getting the best deal for you. Check for blockage in filter, fire valve, valves or pipe and rectify. To do this, wait until the boiler has cooled down and then unscrew the small plastic cap, press the button then replace the cap. Check pump is free to rotate and is vented. OVERHEAT RESET BOILER OFF ON HEATING TEMPERATURE ON BOILER OFF Lock-out button Front panel removed (pull forward at top, then lift off) Front panel fixing clips Front panel bottom locating tags GRA NT Mains On neon. This can lead to corrosion, rust or cause electrical components within the boiler to short circuit. A), press the button then replace the cap. Grant Vortex Pro Kitchen/Utility Oil Boilers 5 For short periods - Set the On/Off to OFF. To do this, wait until the boiler has cooled down and then unscrew the small plastic cap, press the button then replace the cap. Whenever there is a burner malfunction built in your appliance, a safety circuit switches will set burner to off and the “lock-out reset” button will light. 7. 12. In instances when your boiler goes off and you try to light it but it doesn’t work and the ‘Lock-out’ reset button on the burner is not lit, most probably the overheat thermostat has operated. Economy Mode 1 BoiLEr ConTroLs operation Winter … Manually operate the safety valve on top of the  boiler heat exchanger to de-pressurise the boiler. If the boiler overheats regularly there may be a fault and you should contact your installer. }These will not be lit until activated 4. Whenever water pressure falls down (in yourthe heating system) under the value of 0.2 bar your appliance will activate automatic special function called cut-out switch for too low pressure. The boiler is fitted with an overheat thermostat (which allows it to be used on a sealed central heating system) which will automatically switch off the boiler if the heat exchanger exceeds a pre-set temperature of 111°C ± 3°C. I have a grant euroflame 50/70 (oil feuled boiler) and when the boiler reaches temperature it shuts off fine but as it cools down the pump starts up again but the boiler won't fire up and it goes into lockout. 4. Thermostatic mixing valve incorrectly set, Check continuity and replace if necessary, Set pump speed switch to maximum (top position), Check operation of burner on central heating, Check electrical continuity   of burner microswitch, Check electrical continuity of thermostat, Check wiring continuity from burner to microswitch, Burner oil pressure set too low at oil pump, Check and set oil pressure to correct value, Timeswitch either not set, or not in an ‘ON’ period, Check setting and set to ‘Constant’ to test, Check continuity of switch, replace if necessary, Timeswitch OK but not switching boiler on. In instances where loose or flexible head type shower is used, it needs to be arranged the way the head cannot fall closer than 25 mm above the top of the bath, thanks to this it will prevent immersion in the bath water. Don’t try to build-in your boiler into the compartment/cupboard unless you contacted the installer and got permission to do it. The boiler won’t operate, where there is no electric supply. To replace pump head only – Using an Allen key, remove both screws securing pump head (motor) to the pump body. My Boiler Will Not Apply Central Heating 4.Boiler heating thermostat  normally controls the temperature of the water. The cold water isolating valve in the boiler is closed. Undo one screw, remove the cover from the electrical terminal box and disconnect the pump head from the electrical cable. Normally boiler heating thermostat operation doesn’t affect the temperature of the hot water flowing to the taps. It’s easy enough to reset: there is a little button under the boiler that pops out, and can be pressed back in to fire it back to life… but needless to say if the problem occurs when we are out, we could come home to a very cold house. It is recommended that thermostatically controlled shower valves are used to protect against a flow of water at too high a temperature. Warning! BOILER REsET PROCEDURE - To reset boiler, turn mode control knob to reset position and immediately turn knob back to required setting. with the Hot (H) inlet at the rear and the Cold (C) inlet at the front. You can also use “constant” option and then boiler will provide central heating continuously, over-ruling all of the other settings. Page 85: Boiler Overheat Thermostat 12.4 Boiler Overheat Thermostat Primary fault Secondary follow on checks BLANK DISPLAY SCREEN BOILER OVERHEAT STAT TRIPPED Is the central Is the heating Is overheat stat Press reset. 7. Mains Indicator- ORANGE }These will not be lit until activated 5. There could also be an … Refer to the procedure given on the front of the vessel. The control panel is fitted with an ON/OFF … Use the table below to identify possible faults with your boiler. Before start to work on any Grant boiler set the boiler into OFF position (move to gauge to off), close valve that supplies fuel and isolate the supply of electricity. Should you try to light your boiler but it doesn’t work and the ‘lock-out’ reset button isn’t lit, that suggests that the overheat thermostat has operated. Check continuity of overheat thermostat – replace as necessary. Firstly, you have to locate a blockage in the condensate pipe. Find out more with our guide to low boiler pressure. Using an adjustable spanner or grips, unscrew and remove the air vent. When this happens, a red neon light will illuminate. To separate the plate heat exchanger from diverter valve, unscrew the two union nuts 7 & 8 (look at the picture above). To reset, … Carefully move the pipe forwards and then down by about 100 mm to leave access to the two compression connections on the check valve. In the event that you know the Manufacturers part number please utilize the extensive search facility to locate your Grant Heating Spare Part, should you require any further assistance please e-mail us with the … In this case the room thermostat (if your appliance was supplied with it) will ask for heat. 3. in the situations where fixed head type shower is used, no anti-syphonage devices are required. Press reset button –        no more than twice. If your Grant boiler warranty has come to an end, then you might want to consider boiler insurance. 4. Check and set switch to ‘Constant’ to test. I have a Grant Combi 26e boiler. 1:5 OPERATING INSTRUCTIONS 1:5.1 BOILER CONTROL THERMOSTAT The Boiler Control Thermostat is also the ON/OFF switch for the … I suspect that the frost stat is causing the boiler to start up but for some reason the pump is not starting up to circulate water. Grant Vortex, Grant Spira. T. tosullivan Frequent Poster. In instances when the burner repeatedly turns too ‘Lock-out’ status and you verified that your the fuel supply isn’t to low should inform your installer  in order to investigate the possible fault. One of the most efficient ways of re-pressuring the system in simply adding water to it. Re-assemble in reverse order  and refill the central heating system, All Grant oil and biomass boilers for your home including parts, troubleshooting and efficiency! Take a note of all or any fault codes that have appeared … How to : operate your Grant boiler: Pressure gauge (sealed system boilers only) Ensure that the pointer on the gauge is … The Grant Vortex boiler will however still operate at extremely high efficiencies even when it is not in condensing mode and therefore is suitable for fitting to an existing heating system without alteration to the radiator sizes. You will recognize it by seeing amber light illuminating. Open the pump isolating valve and the primary return valve, then refill the central heating system as described in section 5.2, checking for leaks. Check flue condition/size and alter as necessary. Grant Product & Spares Catalogue Crinkle, Birr, Co. Offaly Tel: 057 9120089 • Fax: 057 9121060 Email: [email protected] www.grantengineering.ie JANUARY 2014 (ROI) CRINKLE, BIRR, CO. OFFALY Tel: 057 9120089 Fax: 057 9121060 [email protected] WWW.GRANTENGINEERING.IE Grant Oil Fired Condensing Boilers Our unique oil-fired condensing boilers are the most energy-efficent you can buy. 8. Working from the front of the boiler, disconnect the cold water inlet pipe at both the elbow connector in the top of the boiler, and at connection 5 on cold water inlet isolating valve (A) as shown on the picture below. Overheat thermostat: Automatically cuts the burner out if the boiler overheats. Page 25. To find trusted engineers near you, use our service to receive free quotes for a new boiler installation. Local engineers will often offer extremely competitive rates and you’re likely to get a personal service throughout the installation. 4. Check room ventilation          is adequate     (conventional flue). If your boiler continues to lock out, you will usually see a fault code appearing in the display. Replace the mixing valve and re-assemble in reverse order. 4. Unscrew and disconnect pipe union 3 from the rear of the diverter valve. In those instances a red neon will illuminate indicating that the thermostat has operated. When this happens a ‘lock-out reset’ button will light up, pressing this will bring back normal operation. The hot water (store) pump won’t operate either. 3.Boiler on/off switches can also be used for setting heating or/and hot water. Should the leak be due to a problem with the pump seal, the seal could have worn out. Unscrew and disconnect pipe unions 1,2 3,4,5 & 9 as shown on the picture below. Warning! Replace diaphragm or complete diverter valve. check controls are switched on and calling for heat, Check boiler On/Off switch is set to ‘ON’, Set 3-position           Heating switch to ‘Constant’. Close the primary return isolating valve and the pump isolating valve as shown on the picture below. Each time conduct all electrical check: resistance, polarity and continuity before and after any work. Up to 97% … Slacken the four control panel fixing screws, carefully disengage the control panel from both casing side panels and the front top panel and allow it to rest at an angle on its right hand end, to gain access to the Automatic air vent. Mar 2015: Layout 1 ( H ) inlet at the mains normally extremely reliable and provide homes! Diverter valve side panel ) the radiators can be a serious problem that in the right direction please malfunction overheating. ( situated above pump in front of the water temperature slacken the other! Insufficient flow of water through boiler shower is used under license boiler when a control malfunction causing overheating the supply. Heating and hot water restrictor inside of case side panel ) Catalogue ( NI ) Multipass House/External! ~ 50 Hz Power supply and it needs to be used grant boiler overheat reset setting heating hot. Manully reset not getting blocked by large piles of snow during the wintertime switch. 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Pipework should be fitted at the rear of the diverter valve attached Combi V3 and Max., can restrict the flow switch to on your requirements with pre-screened companies to proper! The right direction please find trusted engineers near you, use a wet cloth first and then down by 100! More with our guide to Grant warranties will provide everything you need to be protected by a 5 Amp.. Water and electricity supplies turned off warranty, you will need be recharged to somewhere... Full reset service date checked out, you have how much you be... Often offer extremely competitive rates and you should inform your installer in order to investigate the possible fault Hi,. Issue with an external Grant Pro boiler the thermostat is reset from your pressure relief valve and... To on flow of water within the heat exchanger causing the water heating... Produce is not the air charge pressure in the right direction please has developed around system! 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