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The company reserve the right to alter size, shape and specification without prior notice 

Page 13 

3.6.3. Fitting hot water cylinder temperature sensor (PTV-E only)  

The  PTV  –  E  has  a  temperature  sensor  supplied  with  the boiler  which  must  be  fitted  to the  domestic  hot  water 
cylinder as this ensures a correct reading of the secondary (DHW) temperature.  
Use  twin  core  cable  of  diameter  0.6mm2  to  0.75 
mm2.  The  cable  runs  from  the  boiler  to  the  hot 
water  cylinder  and  the  probe  should  be  inserted 
approximately 30% of the way up the cylinder and at 
least in the top half of the area covered by a heating 
coil.  The  probe  must  be  touching  the  cylinder  wall 
and  held  in  place  using  the  cylinder  insulation. 
Alternatively  a  thermostat  pocket  can  be  used  if 
available and in the correct position.  

 

 

Water Cylinder temperature sensor 

 

 

Water cylinder temperature sensor connection point 

on boiler's connection plate

 
 
 

3.6.4. Fitting pump connections and expansion vessel (RS – E only) 

Termo RS – E requires expansion vessel and pump(s) to be connected to the heating circuit according to diagram 
on page 6. Circulation pumps for central heating and hot water should be connected to connections plate 
according to diagrams in Appendix 1. 
Termo Plus and PTV boilers are supplied with pumps and expansion vessel factory fitted and pumps wired to the 
connections plate. 

Summary of Contents for TERMO PLUS-E

Page 1: ...TERMO ELECTRIC BOILERS MANUAL OSO TERMO RS E OSO TERMO PLUS E OSO TERMO PTV E B C ...

Page 2: ......

Page 3: ...mmissioning 10 3 4 1 Installation 10 3 4 2 Ancillary components 10 3 5 Connection to the electrical mains supply 11 3 6 Room thermostat temperature probes and pumps connection 12 3 6 1 Connect room thermostat programmer 12 3 6 2 Fit external temperature sensor 12 3 6 3 Fitting hot water cylinder temperature sensor PTV E only 13 3 6 4 Fitting pump connections and expansion vessel RS E only 13 4 Set...

Page 4: ...atic diagram Termo RS E 31 11 1 2 Wiring diagram Termo RS E 31 11 1 3 S Plan wiring layout Termo RS E 32 11 2 Appendix 2 Termo RS Space heating only 33 11 2 1 Schematic diagram Termo RS E 33 11 2 2 Wiring diagram Termo RS E 33 11 2 3 S Plan wiring layout Termo RS E 34 11 3 Appendix 3 Termo PLUS E 35 11 3 1 Schematic diagram Termo plus E 35 11 3 2 Wiring diagram Termo plus E 35 11 3 3 S Plan wiring...

Page 5: ...y use is maintained at 100 efficiency No flue or fan required Almost silent in operation No bulk oil storage tanks required No annual safety check required 1 4 Termo concept The OSO Termo E range of boilers uses technology widely used in Europe but relatively new in the UK that modulates the boiler to reduce power consumption 1 5 Outside temperature sensor An outside temperature sensor is supplied...

Page 6: ...will be referred to in this installation manual as RS E Plus E and PTV E TERMO boilers are available in 240V single phase 4 8 6 7 2 10 8 and 14 4 kW OSO Termo boilers can be connected together to provide more power the boilers can also be supplied for use on three phase supplies Please contact Oso for details 1 8 Water heater temperature sensor The Termo PTV E boiler is supplied with a temperature...

Page 7: ...ry flow 2 Primary return 3 External boiler jacket 4 Boiler 5 Armaflex Insulation 6 Immersion heaters 7 Control panel 8 Cable entry point 9 Contactors and RCD switch 10 Charge and discharge val ve 11 Pocket with temperature probe 12 Safety valve supplied loose 13 Drain valve not supplied 14 Isolation valves not supplied 15 Manual venting valve not supplied ...

Page 8: ...ut prior notice Page 2 RS E Technical Data For RS E Power kW Boiler Capacity Litres Dimensions mm Dry Weight kg Maximum primary operating pressure MPa bar Connection BSP male Power supply 4 8 6 7 2 10 8 14 4 6 A 330 B 750 C 230 D 100 E 57 F 126 21 4 0 25 2 5 240V N 50 60 Hz ...

Page 9: ...al boiler jacket 4 Boiler 5 Armaflex insulation 6 Electrical heaters 7 Control panel 8 Cable entry point 9 Contactors 10 Expansion vessel 11 Circulation pump 12 Safety valve 2 5 bar 13 Automatic air vent AAV 14 Charge and drain valve 15 Boiler venting valve 16 Air indicator 17 Manifold 18 RCD switch 19 Pocket with temperature probe 20 Pressure probe ...

Page 10: ... 4 Plus E Technical Data For Plus E Boilers Power kW Boiler Capacity Litres Expansion vessel L bar Dimensions Mm Dry Weight kg Maximum primary operating pressure MPa bar Connection BSP male Power supply 4 8 6 7 2 10 8 14 4 6 8 0 8 A 330 B 930 C 230 D 100 E 65 F 320 34 5 0 25 2 5 240V N 50 60 Hz ...

Page 11: ...flex insulation 6 Electrical heaters 7 Control panel 8 Cable entry point 9 Contactors 10 Expansion vessel 11 Circulation pump 12 Safety valve 2 5 bar 13 Automatic air vent AAV 14 Charge and drain valve 15 Boiler venting valve 16 Air indicator 17 Manifold 18 RCD switch 19 Pump for water cylinder 20 Primary flow for water cylinder 21 Pocket for temperature probes 22 Pressure probe ...

Page 12: ...cal Data For PTV E Boilers Power kW Boiler Capacity Litres Expansion vessel L bar Dimensions Mm Dry Weight kg Maximum primary operating pressure MPa bar Connection BSP male Power supply 4 8 6 7 2 10 8 14 4 10 10 0 8 A 400 B 930 C 230 D 150 E 65 F 150 G 50 H 305 44 2 0 25 2 5 cylinder 1 heating 240V N 50 60 Hz ...

Page 13: ...ry system L Maximum power of Boiler kW 8 4 0 114 14 4 10 0 4 4 0 08 0 8 0 3 3 10 5 0 50 143 14 4 Values are related to working temperature range from 10 C to 90 C 2 3 Supply Characteristics 240V N 50 60 Hz POWER nominal current MCB Rated short circuit breaking capacity Icn EN 60898 Rated short circuit breaking capacity Icn IEC 947 2 Cable size RCD switch type 4 8 kW 20 A B25 1 25 2 0 03 A 6 kW 25 ...

Page 14: ...esent no known hazards when used in the manner for which they are intended The guarantee is only valid if the following conditions are observed The boiler must be installed by a registered engineer to comply with current building regulations current IEE electrical wiring regulations BS 7671 local authority regulations water supply regulations and health and safety at work regulations Other Relevan...

Page 15: ...x the hanging bracket see page 12 No 3 to the wall using suitable plastic plugs and M8 or M10 screws not supplied Decide the position of the bottom of the boiler giving due consideration to the recommended minimum clearance and then drill holes to accept the boiler mounting plate Screw points should to be drilled the following distances above the bottom of the boiler casing RS E 624mm Plus E 610mm...

Page 16: ...with lead free solder The Plus E and PTV E are self contained system boilers that manage heating flow to the radiators and or under floor The PTV E also supply heat to a domestic hot water cylinder External motorized valves are not required excepting when a PTV E is connected to an Unvented Water Heater and therefore systems such as S Y plan are not applicable As motorized valves are not used a by...

Page 17: ...be used Miniture circuit breakers MCB must be fitted in the wiring prior to the boiler For MCB ratings see table on page 12 Measure exact voltage between L and N lines prior to connecting boiler if it 10 higher than nominal voltage on appliance appliance itself can be damaged Connect the boiler to the mains using a double pole linked switch with 3mm contact gap in both poles There is an RCD switch...

Page 18: ...for control unit are for connection to room thermostat programmer 3 6 2 Fit external temperature sensor The external temperature sensor delivered with boiler must be fitted in a permanently shaded area to prevent sudden temperature changes through exposure to direct sunlight When fitting the sensor please observe arrow marking top position can be seen when protective cover is removed The sensor is...

Page 19: ...e area covered by a heating coil The probe must be touching the cylinder wall and held in place using the cylinder insulation Alternatively a thermostat pocket can be used if available and in the correct position Water Cylinder temperature sensor Water cylinder temperature sensor connection point on boiler s connection plate 3 6 4 Fitting pump connections and expansion vessel RS E only Termo RS E ...

Page 20: ...connected or is short circuited o2 or c2 thermal sensor for external temperature isn t connected or is short circuited o3 or c3 thermal sensor for secondary dhw temperature isn t connected or is short circuited 2 Led diodes of heater stages in use LED diodes light to show how many heating elements are active 3 Led diode OK air in boiler If there is no air in the boiler the diode lights green If ai...

Page 21: ...r down channels at either side 4 Remove control panel Push up from bottom and pull out Pull out whole of panel there should be no need to disconnect any wires connected to control panel 5 Remove black plastic shroud at rear of control panel by undoing 2 cross headed screws 6 Control switches for heating curves are in the position circled in the photograph above 7 Default setting for radiators is a...

Page 22: ...ntral heating from periods for domestic water heating Switches 7 and 9 on electronic control panel have a different function when 7 day control unit for central heating and sanitary water preparing is installed In this case position 0 is AUTO operations as controlled by control unit Honeywell Danfoss and position 1 is MANUAL operations are controlled by boiler s control panel When sanitary water a...

Page 23: ...ks in the display Press key 6 up or down to change offset in steps of 1 C If there is no pressure on the key for more than 5s shown value of offset in C is saved Factory setting is 0 C Offset range is from 9 to 20 C Please note that Thermal heating processes are slow and the impact of alterations will not be felt immediately Oso recommend that adjustments are given at least 24 hours to take effect...

Page 24: ...ing is off when desired secondary DHW temperature is reached the desired primary temperature reverts to the stand by value of primary water temperature in the boiler If the cylinder probe repeatedly calls for domestic hot water heating the desired water temperature in the boiler is automatically set to 15 C higher than the desired secondary DHW temperature There is a 5 C difference between switch ...

Page 25: ... limescale attack We recommend inspection of the boiler once a year by an authorized service engineer This service is not included in the guarantee During the inspection all electric and water connections should be tightened the system should be vented and if necessary filled up valves and general functionality of the device and safety valves should be checked When cleaning the product do not use ...

Page 26: ...iting maximum power of boiler manually deactivating 1 or more immersion elements Press key 6 up and hold for 10 seconds to limit power level By pressing the key up and down it is possible to select 1 2 or 3 as number of available power levels immersion heaters If there is no pressure on key 6 for more then 5 sec selected power level mode is saved Boilers from 6 to 16 kW have only two power levels ...

Page 27: ...ing is 0 C Offset range is from 9 to 20 C If there is no pressure on the key for more than 5s shown value of offset in C is saved Setting the minimum primary temperature inside boiler Press key 6 down and hold for 10 seconds to select minimum primary temperature inside boiler Minimum primary temperature starts to blink Factory setting is 45 C for radiator heating Factory setting is 30 C for under ...

Page 28: ...nd hold for more than 5 seconds to set secondary DHW temperature The desired secondary DHW temperature blinks By pressing the key 8 up or down the value of desired secondary DHW temperature in the storage cylinder changes in 1 C steps If there is no pressure on the key for more than 5s the value from the display is saved as the desired secondary DHW temperature Possible adjustment from 10 C up to ...

Page 29: ...essure on the key for more than 5s the value from a display is saved as time for secondary DHW pump overrun Factory default overrun is 1 min Setting stand by primary temperature inside boiler Press the key 8 down and hold for 10 seconds to set stand by primary temperature inside boiler LED display will show current stand by primary temperature inside boiler Press key 8 up or down to change stand b...

Page 30: ... ON NO Electrical part of boiler heater switch relay is faulty Does DISPLAY show temperature inside boiler NO NO YES Is the temperature of water same as desired YES Wait for boiler to heat up NO Is the room thermostat switched ON YES Switch ON room thermostat Check isolation valves NO YES Faulty control panel NO Please check the following before going through fault finding flowchart Check the inst...

Page 31: ...he operating thermostat defective NO NO Replace the operating thermostat with new YES Please check the following before going through fault finding flowchart 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 Check the electrical supply is connected correctly and present NO Adjus...

Page 32: ...ater pressurised and purged of air Programmer and controls outside of boiler are on Check the electrical supply is connected correctly and present Central heating system was not vented properly Lower the speed on central heating pump see guide below YES NO Changing the speed of pump for central heating For Termo Blok and Termo Blok PTV open the cover of boiler as described in chapter 4 4 and locat...

Page 33: ...art 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 Check the electrical supply is connected correctly and present YES Find and restore break of connection Are the parameters for DHW on control panel or and external programmer correct Change parameters NO YES Check external pr...

Page 34: ...stallation 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 Check the electrical supply is connected correctly and present YES Find and restore break of connection Are the parameters for central heating on control panel or and external programmer correct Change parameters NO YES Check external progra...

Page 35: ...etween earth PE and change it YES Please check the following before going through Fault finding chart 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 Check the electrical supply is connected correctly and present Check the status of safety thermostat try to reset it Switch on ...

Page 36: ...there are other high load electrical appliances e g electric ovens electric showers etc fitted in the property with the boiler there is a possibility of overload on the electrical system The Oso cascade power limiter is a unique device that continually monitors the electricity consumption of the property and if required will power down the boiler temporarily to prevent overload 10 OSO Hotwater UK ...

Page 37: ...eserve the right to alter size shape and specification without prior notice Page 31 11 1 Appendix 1 Termo RS with space heating and water heating 11 1 1 Schematic diagram Termo RS E 11 1 2 Wiring diagram Termo RS E ...

Page 38: ...The company reserve the right to alter size shape and specification without prior notice Page 32 11 1 3 S Plan wiring layout Termo RS E ...

Page 39: ...company reserve the right to alter size shape and specification without prior notice Page 33 11 2 Appendix 2 Termo RS Space heating only 11 2 1 Schematic diagram Termo RS E 11 2 2 Wiring diagram Termo RS E ...

Page 40: ...The company reserve the right to alter size shape and specification without prior notice Page 34 11 2 3 S Plan wiring layout Termo RS E ...

Page 41: ...e is for informational purposes only not all details necessary for installation are shown 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 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 11 3 2 Wiring diagram Termo plus E ...

Page 42: ... reserve the right to alter size shape and specification without prior notice Page 36 11 3 3 S Plan wiring layout 11 4 Appendix 4 Termo PTV E 11 4 1 Schematic diagram Termo PTV E 11 4 2 Wiring diagram Termo PTV E ...

Page 43: ...The company reserve the right to alter size shape and specification without prior notice Page 37 11 4 3 S Plan wiring layout Termo PTV E ...

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