Unvented waterheaters

Transcription

1 OSO Hotwater UK Unvented waterheaters UK Superior stainless steel quality. Made in Norway

2 About OSO Hotwater OSO Hotwater is Europe s leading manufacturer of stainless steel water heaters, pioneering the development since the first mass produced unit left our factory 40 years ago. OSO Hotwater has continuously invested to make our Norwegian factory one of the most high tech production facilities in Europe for water heaters, making our products better, lighter and more efficient. Our mission is founded on the principles that OSO shall contribute to the well-being of both man and environment. The solutions we offer shall satisfy our customers demands, while at the same time benefit our planet. In 1995 the company established OSO ECO foundation, donating 1 mill. USD in capital to its cause - 5 % of OSO s annual profit goes to environmental projects. With 200 dedicated employees and 80 years of experience, we strive to offer the best possible customer service, along with our top-of-the-line products. C O N T E N T S Key advantages of OSO products 3 Page Indirect water heaters 4 Super Coil - SCI - For high temp. heat sources 4 Solarcyl - RI SD - Solar hot water 6 Solarcyl Twin Coil - RI TC - Combined heat sources 7 Ecoline - GEO - Heat pump cylinder 8 Optima Coil - EPCI - Heat pump cylinder/buffer 9 PowerCyl - RI F1 - For higher pressures 10 Slimline - RI - For tight spaces 11 Direct electric water heaters 12 Super Xpress - SXD - Unique pioneering design 12 Mini - RM5 - point of use water heater 14 Slimline - RD - for tight spaces 15 Peripherals 16 Accu - 50R &RC - Buffer vessels 16 SuperStream - OSI - Accumulator stores 17 SuperJig - SJ - converter to pre plumbed system 18 OSO spare parts 19 Commercial water heaters 20 Choose your commercial heater 20 Maxi Standard - 17RE (SE) - Direct electric 21 Maxi Combi - 17RVE - Indirect 22 Maxi Combi - 17RTVE - Twin coil indirect 23 Maxi Buffer - 17RB - Potable water buffer 24 Maxi Turbo - 17R (S) - Plate heat exchanger 25 Termo electric boilers - wet system 26 Product Guarantee 27

3 Key advantages of OSO products: Extremely low weight OSO utilizes Duplex stainless steel in all Super Series units. The material s high tensile strength enables us to use less raw material, and still achieve high strength and extremely low weight. Minimum heat loss OSO has developed the ECO Foam insulation. This is environmentally friendly (uses water as blowing agent), while at the same time providing optimum insulation capabilities. High efficiency and capacity The water temperature of Super Series water heaters is higher than most others, at 70 C. Higher temperature means more hot water available in a smaller unit. High corrosion resistance The combination of Duplex steel and laser welding on the Super Series, as well as the molybdenum enriched ferritic steel used on all other product series, provides high corrosion resistance. Environmentally correct procedures The environment has been at the core of our business for more than 40 years. The creation of our own ECO foundation in 1995 has supported numerous environmental projects, and we are dedicated to spending 5 % of our profits each year on the environment. Experience OSO Hotwater was Europe s first mass producer of stainless steel water heaters in Since then, more than 3 million units have been delivered, providing unique experience. Certifications and approvals We are proud to hold the ISO 9001:2008 / ISO 14001:2004 / OHSAS 18001:2007 certificates. 25 year warranty on the stainless steel pressure vessel Since we are confident in our products, we give a 25 year warranty on our stainless steel pressure vessels the heart of any stainless steel water heater. Conditions apply. RoHS 2002/95/EC

4 Super Series SCI - indirect cylinder for boiler connection A Pressure reducing valve 3 bar Front B Expansion relief valve 8 bar C Temp & pressure relief valve 90 C/10 bar D Hot water blending valve E Expansion vessels F Flexible hose and T-piece E G J P N M R G Tundish H Flexible Y-hose J Primary flow K Expansion vessel connection point & optional secondary return point (use T-piece - not supplied) L Line Strainer M Cold water main supply inlet N Balanced cold water connection Rear P Domestic hot water outlet R Primary return It should be noted the OSO Super Series is designed with all pipe fittings coming off the top of the cylinder, the cylinder should be installed with the pipe connections facing the rear of the cupboard. To assist pre installation each cylinder is supplied with fitting templates, additional templates are available from OSO UK and as a download from our web site. 300 litre cylinders supplied with separate 18 litre expansion vessel. Super Smart Super Simple Super Special 100% recyclable insulation Ultra low heat loss Secondary return facility standard on all cylinders Fantastic heat up & recovery times 11 minute recovery for a 150 litre indirect cylinder Space efficient Unparalleled performance Unique enclosed secondary expansion Unique inlet control valve Electric cables hidden Easy installation No visible frontline pipework Reduced fitting time High quality Duplex stainless steel 80 years of innovation and excellence Pioneering laser welding 25 years cylinder guarantee Mechanically sealed connections - double O ring and Loctite Fit with SuperJig (page 18) to convert to pre-plumbed cylinder

5 Super Coil - SCI - with integrated expansion vessel Heating coils in OSO cylinders are made of smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid and therefore have a greater heat transfer capacity. Next generation unvented cylinder The Super Coil is the indirect version within the Super Series range and has a unique, integrated expansion solution factory fitted. All pipes & connections are also hidden under an insulated top lid. Factory fitted components drastically reduces fitting time, making the Super Series virtually a pre-plumbed unit. Laser welded Duplex Stainless Steel makes the Super Series extremely lightweight & space efficient for easy handling & installation. Low heat loss, secondary return, impressive heat up & recovery times and a 25 year guarantee. The OSO Super Coil is a quantum leap in unvented cylinder design. The integrated expansion vessels make the cylinder extremely compact in height. Super Coil will fit in a cylinder cupboard 650mm wide. All plumbing connections and electrical cables are hidden from view giving the neatest possible installation. Adjustable feet are also integrated. The factory fitted blending valve limits the temperature of the outgoing water to 60 C when drawn off, increasing available hot water compared to others. All pipes connect to the Super Coil from the rear. The installer fits the pipes to the back wall together according to a supplied template and finally slides the cylinder into place to marry the valve connections with the pre-cut pipe tails. Super Coil can be converted to a pre-plumbed unit including full S-plan heating system with the connection to the OSO SuperJig (see page 18). Unique, integrated and factory fitted expansion solution and control valve. 26kw coils give recovery time from 11 minutes and can produce over eight 100ltr baths per hour Super space efficient with low height and 650mm cylinder cupboard width Product - Vol. - kw+coil surface area Suited for Dia x H mm Conn cw/hw - f/r Heat loss 24h. Hw cap. 40 No. of showers* Recovery/mins. Coil rating kw Kg SCI kw/1x240v+coil 0,9m² 1-2 pers. ø580 x 870 H ø22 mm / ø22 mm 1,29 kwh 162 litres SCI kw/1x240v+coil 0,9m² 2,3 pers. ø580 x 1050 H ø22 mm / ø22 mm 1,44 kwh 226 litres SCI kw/1x240v+coil 0,9m² 3-4 pers. ø580 x 1160 H ø22 mm / ø22 mm 1,64 kwh 257 litres 3, SCI kw/1x240v+coil 0,9m² 4-5 pers. ø580 x 1300 H ø22 mm / ø22 mm 1,90 kwh 312 litres SCI kw/1x240v+coil 0,9m² 5-6 pers. ø580 x 1550 H ø22 mm / ø22 mm 2,11 kwh 397 litres 5, SC 300** - 3 kw/1x240v+coil 0,9m² 6-7 pers. ø580 x 1750 H ø22 mm / ø22 mm 2,30 kwh 475 litres 6, **300 litre unit provided with wall mounted expansion vessel *6 min. showers at 12 lpm

6 Solarcyl - RI SD - solar direct hot water with electric heating backup Heating coils in OSO cylinders are made of smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid (8 litres) and therefore have a greater heat transfer capacity. Providing free solar heated hot water The Solarcyl is a purpose-designed solar ready unvented cylinder, providing high solar input from the large heating coil and substantial dedicated solar volume. The Solarcyl has back-up heating with twin electric immersion heaters. High performance fully flooded design, with expansion vessel supplied with the cylinder. The Solarcyl is able to provide up to 60% of annual domestic hot water requirements from free solar energy captured by roof panel collectors. Solar thermal installations using the Solarcyl can be eligible for government backed Renewable Heat Incentive. Solarcyl is ideal for connection with all types of solar collectors and should be connected with a differential controller to complete a high performance system. The positioning and size of the coil in the Solarcyl maximizes the use of available solar energy. A second electric immersion heater is fitted in the top half of the cylinder for boosting temperature when solar energy is low. The fully flooded design offers a superior hot water performance when solar gain is low, and the separate, external expansion vessel is supplied with wall bracket and flexible hose. Large heating coil specifically designed for solar collectors. Twin immersion heaters for back-up heating when solar gain is low. OSO ECO Foam insulation and 25 year guarantee. SolarCyl is supplied with twin bosses and dry pockets at low and high levels for insertion of temperature sensor probes. Heating coils in OSO cylinders are made of smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid and therefore have a greater heat transfer capacity. Product - Vol. - kw + coil surface area Suited for Dedicated Solar Vol. Vs Dia x H mm Conn cw/hw - f/r Heat loss 24h. Hw cap. 40 Kg RI SD kw/1x240v+coil 0,8m² 2-3 pers. 97 ltr ø580 x 1400 H ø22 mm / 3/4 2,1 kwh 381 litres 53 RI SD kw/1x240v+coil 0,8m² 3-4 pers. 97 ltr ø580 x 1600 H ø22 mm / 3/4 2,3 kwh 453 litres 56

7 Solarcyl Twin Coil - RI TC - solar/boiler combination Heating coils in OSO cylinders are made of smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid (8 litres) and therefore have a greater heat transfer capacity. Twin coil for solar heating with boiler back-up The Solarcyl Twin Coil is a purpose-designed unvented cylinder for combining alternative heat sources. A low temperature heat source in combination with a high temperature heat source is the optimal combination. The Solarcyl Twin Coil has an electric immersion heater as backup in the lower part of the cylinder. High performance fully flooded design, with expansion vessel supplied with the cylinder. Solarcyl Twin Coil contains a large high efficiency solar coil in the base, with the upper coil connected to a boiler. This combination will provide hot water without the use of electricity. Other combinations are also possible. Solar or heat pump installations using the Solarcyl Twin Coil can be eligible for government backed Renewable Heat Incentive. The positioning and size of the coils in the Solarcyl Twin Coil maximizes the use of the alternative heat source, whilst supplying plenty of high temperature hot water. An electric immersion heater is fitted in the bottom of the cylinder for back-up heating. The fully flooded design offers a superior hot water performance, and the separate external expansion vessel is supplied with wall bracket and flexible hose. Specifically designed for low- and high temperature heat sources in combination. Immersion heater for electric back-up heating when necessary. Dedicated secondary return connection on all SolarCyl units SolarCyl is supplied with twin bosses and dry pockets at low and high levels for insertion of temperature sensor probes to control heat from solar collectors and high specification boilers. Product - vol. - kw+coil surface area Suited for Dedicated Solar Vol. Vs Dia x H mm Conn. cw/hw - f/r Heat loss/24h. Hw cap. 40 C Kg RI TC 200-3kW/1x240V+coil 0,8+0,5m² 2-3 persons 97 ltr ø580 x 1150 H ø22 mm / 3/4 1,9 kwh 284 litres 50 RI TC 250-3kW/1x240V+coil 0,8+0,5m² 3-4 persons 97 ltr ø580 x 1400 H ø22 mm / 3/4 2,1 kwh 351 litres 54 RI TC 300-3kW/1x240V+coil 0,8+0,5m² 4-5 persons 97 ltr ø580 x 1600 H ø22 mm / 3/4 2,3 kwh 426 litres 57 RI TC 380-3kW/1x240V+coil 0,8+0,8m² 5-6 persons 128 ltr ø580 x 2100 H ø22 mm / 3/4 3,2 kwh 538 litres 83

8 Ecoline GEO - RI HP - heat pump cylinder with electric booster Heating coils in OSO GEO cylinders are made of increased length smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. Longer length smooth coils have a greater heat transfer capacity compared to finned or rippled coils. Large capacity heating coil for heat pumps The Ecoline Geo is a purpose-designed heat pump ready unvented cylinder, providing high heat pump input from the extremely large heating coil and substantial dedicated heat pump volume. The Ecoline Geo has an electric immersion heater for boosting temperature in the upper part of the cylinder. High performance fully flooded design, with expansion vessel and motorized valve supplied with the cylinder. Heat pump installations using the Ecoline Geo can be eligible for government backed Renewable Heat Incentive. Ecoline Geo is ideal for connection with all single phase heat pumps up to 14 kw for a high performance system. Geo 200 is suitable for heat pumps up to 10 kw and has a 19 m coil. The positioning and size of the coil in the Ecoline Geo maximizes the use of airsource or ground-source energy from the heat pump. An electric immersion heater is fitted in the top half of the cylinder for boosting the temperature, which, from the heat pump, is typically C. The fully flooded design offers a superior hot water performance, and the separate external expansion vessel is supplied with wall bracket and flexible hose. The heating coil supports optimum heat transfer for heat pumps up to 14kW and is made from smooth pipe to prevent limescale accumulation. The 25m length and 8 litre water content of the OSO heat pump coils give them superior heat transfer performance. GEO cylinders are supplied with bosses and dry pockets for insertion of temperature sensor probes at low and high levels to interact with Heat Pump. Specifically designed for airsource or ground-source heat pumps up to 14 kw. Immersion heater for boosting temperature from heat pump unit. OSO ECO Foam insulation and 25 year guarantee. Product - vol. - kw + coil surface area Suited for Coil volume Dia x H mm Conn. cw/hw - f/r Coil kw rating* Hw cap. 40 C Heat loss/24h. Kg RI HP kw/1x240v+coil 1,4m² 2-3 pers. 7.6 ltrs. ø580 x 1150 H ø22 mm / 3/ ltrs. 1,9 kwh 49 RI HP kw/1x240v+coil 1,8m² 2-3 pers. 8.0 ltrs. ø580 x 1400 H ø22 mm / 3/ ltrs. 2,1 kwh 55 RI HP kw/1x240v+coil 1,8m² 3-4 pers. 8.0 ltrs. ø580 x 1600 H ø22 mm / 3/ ltrs. 2,3 kwh 65 *Tested to BS EN 12897

9 Optima - EPCI - heat pump cylinder with integral buffer store Hw Heating coil in OSO Optima is made of increased length smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. Longer length smooth coils have a greater heat transfer capacity compared to finned or rippled coils. PLAN VIEW Cw Space heating The ideal choice for heat pumps - space heating and hot water The Optima s unique construction (pat.) provides optimal working conditions for non-inverter driven heat pumps, whilst at the same time providing a buffer vessel in the same unit. The buffer vessel functions as energy storage for space heating requirements, while the heat pump is producing domestic hot water. A high performance fully flooded design, with expansion vessel and motorized valve supplied with the cylinder. The unique 2-in1 tank on tank construction provides maximum COP (Coefficient of Performance) for the heat pump of your choice up to 14 kw. The buffer vessel of 100 litres is located at the lower part of the unit, in its own temperature zone suitable for low temperature space heating such as under floor heating or fan convectors. The suitable space heating temperature in the buffer tank transfers heat upwards to the domestic hot water tank through the cylinder, thereby reducing return temperature to the heat pump and maximizing COP. DHW coil in the upper cylinder is positioned to eliminate risk of heat leaking downwards into the buffer vessel. Once there is domestic hot water use, the diverting valve in the heat pump switches its flow into the 1.8 m² heating coil in the upper cylinder, providing maximum heat transfer and domestic hot water production. The 3 kw immersion heater heats the water up to 65 C. During this time, the buffer vessel continues to provide consistent temperature to the space heating system, without compromising performance. The heating coil supports optimum heat transfer for all single phase heat pumps up to 14 kw and is made from smooth pipes to prevent limescale accumulation. The 25m. length and 8 litre water content of the OSO heat pump coils give them superior heat transfer performance. The energy efficiency of the system is unsurpassed, since the Optima minimizes heat loss, maximizes COP for the heat pump and increases domestic hot water production. Optima is supplied with bosses and dry pockets for insertion of temperature sensor probes at low and high levels to interact with Heat Pump. Heat pump EPCI 360 All in one solution with minimum heat loss and considerable space saving. Maximizes COP for heat pumps up to 14 kw, and significantly improves working conditions. Higher domestic hot water production than other solutions and electric backup. Product - vol. - kw + coil surface area Suited for Dia x H mm Conn. cw/hw - f/r Coil volume Coil kw rating* Hw cap. 40 C Heat loss/24h. Kg EPCI kW/1/3x240V+coil 1,8m² 3-4 persons ø580 x 1900 H ø22 mm / 3/4 8.0 ltrs. 27,6 332 litres 2,9 kwh 86 *Tested to BS EN 12897

10 PowerCyl - RI F1 - for higher pressures and flow rates The OSO PowerCyl is well suited for use with the SuperStream OSI accumulators, see page 19. Indirect unvented cylinder with high flow rate The PowerCyl cylinders come standard with 1 hot and cold connections for high flow rates, and can operate at up to 5 bar pressure. The PowerCyl has large heating coils for fast heating times, and low heat loss due to the OSO ECO Foam insulation. Dedicated secondary return and a 25 year cylinder guarantee. The PowerCyl cylinders has large heating coils for fast heating times. Heat loss is restricted by OSO ECO Foam insulation. PowerCyl cylinders with 1 hot and cold connections are ideal where high water flow rates are required. The PowerCyl is the key component in the OSO SuperStream system, providing dramatically boosted flow rates available to the hot and cold water taps by supplementing the mains flow rate with stored water in an accumulator. Large capacity heating coils give fast heat up time & recovery, and heat loss is restricted by OSO ECO Foam. External expansion vessel is supplied as standard. Heating coils in OSO cylinders are made of smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid and therefore have a greater heat transfer capacity. Large heating coils for fast heating tmes. 1 hot and cold connections for larger households. OSO ECO Foam insulation and 25 year guarantee. OSO F1 cylinders are supplied with an adjustable pressure reducing valve to provide enhanced pressure and performance compared to other unvented cylinders. Product - vol. - kw + coil surface area / vol. Suited for Dia x H mm Conn. cw/hw - f/r Hw cap. 40 C Heat loss/24h. Kg RI F kW/1x240V+coil 0,9m² / 4 l. 5-6 persons ø580 x 1400 H 1 female / 3/4 397 litres 1,95 kwh 56 RI F kW/1x240V+coil 0,9m² / 4 l. 6-7 persons ø580 x 1600 H 1 female / 3/4 475 litres 2,19 kwh 68 RI F kW/1x240V+coil 0,9m² / 4 l. 7-8 persons ø580 x 2090 H 1 female / 3/4 590 litres 2,55 kwh 91

11 Slimline Indirect - RI - for tight spaces For the tightest of spaces The Slimline is the slimmest domestic cylinder available at only 430 mm diameter, making the cylinder ideal for instal lation in tight spaces. The cylinder has a large heating coil for fast heating and also back-up electric heating from an immersion heater. Low heat loss comes from OSO ECO Foam insulation. High flow rates provide powerful showers. The cylinder is floor mounted and is supplied with a wall bracket to stabilize the unit. An external expansion vessel is supplied with its own wall bracket. Slimline is simple to fit and follows a similar installation technique to the OSO renewable and PowerCyl cylinders. A dedicated secondary return is supplied as standard. It can also be wall mounted with the supplied bracket. Heating coils in OSO cylinders are made of smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid and therefore have a greater heat transfer capacity. Lightweight & compact cylinder for easy handling & installation. Fast heat up time from large coil Finnes både med og uten el. OSO ECO Foam insulation and 10 year guarantee. Product - vol. - kw+coil surface area Suited for Dia x H mm Conn. cw/hw - f/r Hw cap. 40 C Heat loss/24h. Recovery rate Kg RI 150 (fully flooded) - 2 kw/1x240v+coil 0,7m² 2-3 persons ø430 x 1610 H ø22 mm / 3/4 221 litres 2,3 kwh 15 mins 46

12 Super Series SXD - direct cylinder with twin el. elements Front A Pressure reducing valve 3 bar B Expansion relief valve 8 bar C Temp & pressure relief valve 90 C/10 bar D Hot water blending valve E Expansion vessels F Flexible hose and T-piece E G P N M G Tundish H Flexible Y-hose Rear K Expansion vessel connection point & optional secondary return point (use T-piece - not supplied) L Line Strainer M Cold water main supply inlet N Balanced cold water connection P Domestic hot water outlet It should be noted the OSO Super Series is designed with all pipe fittings coming off the top of the cylinder, the cylinder should be installed with the pipe connections facing the rear of the cupboard. To assist pre installation each cylinder is supplied with fitting templates, additional templates are available from OSO UK and as a download from our web site. 300 litre cylinders supplied with separate 18 litre expansion vessel. Super Smart Super Simple Super Special 100% recyclable insulation Ultra low heat loss Dedicated secondary return facility standard on all cylinders Fantastic heat up & recovery times Space efficient Unparalleled performance Unique enclosed secondary expansion Unique inlet control valve Electric cables hidden Easy installation No visible frontline pipework Reduced fitting time High quality Duplex stainless steel 80 years of innovation and excellence Amazing hot water draw off figures from direct cylinders, resultant from storing water at 70 C and blending via factory fitted valve Pioneering laser welding 25 years cylinder guarantee Mechanically sealed connections - double O ring and Loctite

13 Super Xpress - SXD - with fully integrated expansion vessel Unique pioneering design. All pipes & cables hidden The Super Xpress is the direct version within the Super Series range and has a unique, integrated expansion solution factory fitted. All pipes & connections are also hidden under an insulated top lid. Factory fitted components drastically reduces fitting time, making the Super Series virtually a pre-plumbed unit. Laser welded Duplex Stainless Steel makes the Super Series extremely lightweight & space efficient for easy handling & installation. Low heat loss, secondary return, impressive heat up & recovery times and a 25 year guarantee. The Super Xpress is a quantum leap in unvented cylinder design. All pipes, expansion vessels* and electric cables are hidden from view beneath an insulated removable lid giving the neatest possible installation. A bespoke multifunction valve, including a unique blending valve is factory fitted with the supplied expansion vessels to make the Super Xpress virtually a pre-plumbed unit. Adjustable feet are also integrated. The Super Xpress heats to 70 C, with water then blended to 60 C when drawn off, increasing available hot water compared to others. Cylinders from 150 litres are fitted with twin immersion heaters, suitable for off-peak tariffs. All pipes connect to the Super Xpress from the rear, allowing them to be concealed from view. The installer fits the pipes to the back wall together according to a supplied template and finally slides the cylinder into place to marry the valve connections with the pre-cut pipe tails. Unique, integrated and factory fitted expansion solution and control valve. 70 C storage temperature means 20% more usable hot water. Suitable for off-peak tariff. Super space efficient with low height and 650mm cylinder cupboard width Product - vol. - kw/phxv Suited for Dia x H mm Conn. cw/hw Volume l. Hw cap. 40 No. of showers* Heat loss 24 h. Kg SXD kw / 1x240V 1-2 persons ø580 x 870 H ø22 mm 116 litres 192 litres 2,5 1,29 kwh 37 SXD kw / 1x240V 2-3 persons ø580 x 1050 H ø22 mm 150 litres 269 litres 3,5 1,44 kwh 42 SXD kw / 1x240V 2-3 persons ø580 x 1160 H ø22 mm 175 litres 313 litres 4 1,64 kwh 47 SXD kw / 1x240V 3-4 persons ø580 x 1300 H ø22 mm 206 litres 378 litres 5 1,90 kwh 52 SXD kw / 1x240V 3-4 persons ø580 x 1550 H ø22 mm 250 litres 480 litres 6,5 2,11 kwh 59 SX 300** kw / 1x240V 4-5 persons ø580 x 1750 H ø22 mm 295 litres 574 litres 8 2,30 kwh 65 **300 litre unit provided with wall mounted expansion vessel *6 min. showers at 12 lpm

14 ø200 Mini - RM5 - point of use undersink xpress heater 430 Vv Kv 1 3 RESET L 2 Hw ø15 Cw 3/8 r TS2 + - RGK The ultimate in simplicity for under-sink heaters The Mini is a 5 litre point of use water heater, with an impressive 6 minute heat-up time. The small size makes the Mini ideal for under sink fitting in office buildings etc. where the central hot water supply is located at a distance. The Mini RM5 should be installed horizontally, and has a factory fitted thermostat adjustable C. The OSO MINI RM5 is perfect for point of use under sink water heater. The 3kW element will heat the 5 litre capacity from cold in less than 6 minutes. The unit will be most efficient when fitted horizontally with the connections facing upwards. Wall mounting brackets are provided with the cylinder. Although The RM5 is an unvented cylinder, it requires no expansion vessel, although an expansion relief valve for connection to a waste pipe is supplied. Domestic water expansion is accommodated safely and legally within the cylinder and associated pipework. No check valve should be fitted within 2m of the RM5, to avoid the need for an expansion vessel. Temperature control is achieved through a factory fitted adjustable thermostat, with an additional overheat safety cut out. An electrical cable is supplied factory fitted to the cylinder for connection to the mains supply. Can be fitted without the need for expansion vessel. Only 6 minutes heat-up time from cold water to 60 C. Ideal for office buildings etc., where central heating is located at a distance. Product - vol. - kw/ph x V Suited for Dia x H mm Conn. Volume l. Hw cap. 40 Heating time Kg RM 5-3/1x230V small cabins etc. ø 200 x 430 H 3/8 +ø l l/t. 6 mins. 7 Continous (5-40 C) (10-60 C)

15 Slimline Direct - RD - the slimmest domestic cylinder available For tight spaces The Slimline is the slimmest domestic cylinder available at only 430 mm diameter, making the cylinder ideal for instal lation in tight spaces. The cylinder is designed with twin immersion heaters for off-peak heating and boost element. Low heat loss comes from OSO ECO Foam insulation. High flow rates provide powerful showers. The cylinder is floor mounted and is supplied with a wall bracket to stabilize the unit. An external expansion vessel is supplied with its own wall bracket. Slimline is simple to fit and follows a similar installation technique to the OSO renewable and PowerCyl cylinders. A dedicated secondary return is supplied as standard. Lightweight & compact cylinder for easy handling & installation. Fits into the most compact of spaces - only 430 mm diameter OSO ECO Foam insulation and 10 year guarantee. Product - vol. - kw/ph x V Suited for Dia x H mm Conn. cw/hw Volume l. Hw cap. 40 C Heat loss 24 h. Recovery rate Kg 15RD 150-2/1x230V 2-3 persons ø 430 x 1610 H ø22 mm l. 2,3 kwh 121 mins. 50

16 Accu - 50R & Accu coil 50RC - buffer vessels Heat accumulation for alternative energy sources The Accu series are stainless steel buffer vessels, collecting the heat produced by the energy source, in most cases heat pumps. Utilizing a buffer vessel in the system provides better working conditions and longer runtime for the heat pump, increasing the effectiveness. Accu provides stable temperatures for a traditional heat pump system, in much the same way as the Optima units do. The Accu units are designed to be part of a split system, where the accumulating is done in a separate tank. The units have double sets of 1 flow / return connections, for multiple installation options. In addition, the Accu has one ø22 mm. connection at the top, for letting air out of the system, and one ø15 mm. connection near the bottom for draining the unit. Accu units are available in two sizes, 100 and 300 litres, depending on the capacity of the heat pump. The heat pump connects to the coil, which due to its size provides a large volume which optimizes the heat pump efficiency (COP). Heating coils in OSO cylinders are made of smooth coil that will not encourage limescale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid and therefore have a greater heat transfer capacity. Provides optimal working conditions for the heat pump. The coil provides a large volume for the heat pump, which increases the COP. Finnes både med og uten el. Double sets (4 pcs.) of 1 flow/return connections, for multiple installation options. Product - vol.-kw+coil surface area / vol. Suited for Dia x H mm Conn. flow/ret Conn. drain/venting Conn.coil Kg 50R 100 Heat accumulation ø 430 x 1210 H 4x1 ø15 mm /ø22 mm 18 50R 300 Heat accumulation ø 580 x 1600 H 4x1 ø15 mm /ø22 mm 53 50RC coil 2,6m² / 11 l. Heat accumulation w/coil ø 580 x 1600 H 4x3/4 ø15 mm /ø22 mm 3/4 70

17 SuperStream - OSI - Accumulator stores cold water to boost flow Charger > Cutaway view For exceptional flow rate performance < Valves The SuperStream system provides boosted performance for poor mains supplies. Cold water storage in accumulators guarantees unrivalled pressure & flow rates for multi-outlet demand. Option of charger pump can raise system pressure in building to 3.5 bar. Traditional unvented cylinders depend upon incoming mains pressure and water volume to produce high flow rates. If mains flow is poor, SuperStream accumulators dramatically boost flow rates available to hot and cold water taps by storing water in a membrane diaphragm and delivering it to the cylinder and cold outlets when demand exceeds the mains flow rate available. OSO accumulators have a composite construction with diaphragms manufactured from virgin butyl, giving very light weight & enabling a 5 year guarantee. SuperStream can be fitted with Super Series cylinders or for the highest flow rates with PowerCyl F1 cylinders. SuperStream is typically used in large properties with multiple outlets or in properties where mains flow rate is poor. High flow rates to multiple outlets can be guaranteed even with an incoming mains flow rate as low as 5 litres per minute. SuperStream is supplied with a full valve kit to connect to the cold mains and hot water cylinder. Inline strainer, Pressure gauge, double check valve, Pressure reducing valve and isolation valve. When mains pressure is low, the OSO Charger pump (WRAS approved) will raise water pressure in the property to increase water outlet performance. Product code Nominal capacity Water capacity* Dia x H mm Weight empty Water connection OSSC ø 418 x 1227 H 16 1 BSP male OSSC ø 542 x 1098 H 22 1 ¼ BSP male OSSC ø 542 x 1303 H 27 1 ¼ BSP male OSSC ø 614 x 1448 H 35 1 ¼ BSP male OSSC ø 614 x 1831 H 46 1 ¼ BSP male *at 1,5 bar differential pressure Boosts performance for poor mains supply. No moving parts - silent and reliable Proven performance over 20 years

18 Super Jig - to convert Super Coil to pre-plumbed system Super Jig system layout 1. Boiler flow 2. Exp vessel connection 3. Pressure gauge 4. Pump 5. Auto Air Valve 6. Auto By-Pass 7. Boiler return 8. Wiring centre 9. Motorized valve 10. Filling loop 11. Non-return valve 12. DHW heating flow 13. DHW 14. Balanced cold 15. Cold feed 16. DHW heating return Schematic view > 1 7 Full S-Plan Pre-plumbed systems OSO SuperJig is a unique wall mounted plumbing system that attaches to a Super Coil cylinder and converts it to a fully preplumbed system. SuperJig creates the ultimate in space efficient water storage systems, allowing a full airing cupboard in a new build house. The system is clutter-free of pipes and cables at the front of the cylinder and allows better use of storage space by the home-owner. SuperJig is supplied in one box and includes a full S-plan heating system, pre-wired wiring centre, programmable room thermostats and water heater timer and slimline heating expansion vessel. The jig is fitted on the back wall of the cylinder area, connecting pipes are fitted and the cylinder is moved into place. Single and twin space heating zone versions are available. The developer enjoys security advantages because the cylinder can be fitted at the last moment. System consists of: Heating circulator Pressure gauge Heating zone valves Slimline heating expansion vessel Auto by-pass Auto air valve Filling loop Pre-wired wiring centre Non return valve Programmable room stats Water heater timer Pre-formed copper pipes Perfect connection to Super Coil cylinder Sturdy steel back plate Flexible drilling points Unique space saving advantages Allows a full traditional airing cupboard Finnes både med og uten el. Minimises installation time Super Jig type Suited for water heater Height & Width - mm Weight - kg. Weight of box - kg. Super Jig Single Zone OSO Super Coil SC 600 x Super Jig Twin Zone OSO Super Coil SC 600 x

19 OSO Spare parts Super Series Super Series spare parts part no. description Drain cock kw immersion heater kw immersion heater Tundish Pressure reducing valve Flexible Y hose Expansion relief valve Motorized valve Lower electric box cover Upper electric box cover Mixing valve Flexible hose to expansion vessel Temperature & Pressure relief valve Cable strain relief Expansion vessel 5.3 ltr T piece for expansion vessel 20 Series includes REDC , , REDC (2.1bar), (adjustable pressure) , includes Expansion vessels Immersion heaters Series spare parts part no. description C Fittings pack Multibloc Adj. pressure rdcn cartridge bar REDC Pressure reducing cartridge 2.1 bar Expansion relief valve Expansion relief cartidge Hose 220 mm Temp. & Pressure relief valve T-piece 15 mm x 1/2 F x 15 mm Tundish Commissioning valve Solar Sensor Pockets Elbow/drain cock Electric box cover direct Electric box cover indirect Motorized valve Expansion vessels part no. AX12 AX19 AX24 AX35 Immersion heaters part no. description Expansion vessel 12ltrs Expansion vessel 19ltrs Expansion vessel 24ltrs Expansion vessel 35ltrs description kw 1 1/4 incoloy kw 1 1/4 copper GW kw 1 1/4 titanium kw 1 1/4 incoloy kw 1 1/4 incoloy (20 series only) Box key 50 mm (for above) Box key (for below) kw 1 incoloy (for Slimline) kw 1 incoloy (for RM5)

20 Choose your commercial water heater series Energy source / temperature Water quality Product range Solar collectors Medium Direct electric Normal / (Hard) Maxi Standard 17RE / (Maxi Dublo 18RE) High temperature source Normal Maxi Coil 17RV / Maxi Turbo 17R High temperature source / electric Normal / (Hard) Maxi Combi 17RVE / (Maxi Dublo 18RE) Low temperature source Normal Maxi Turbo 17R / Maxi Buffer 17RB Low temperature source / electric Normal Maxi Turbo 17R / Maxi Buffer 17RB + 81R Accumulator (heat) Normal Maxi Accu 51R Dimensioning of OSO Commercial product series: Below tables show our preferred product capacities of the Maxi series, for different types of systems. It is important to be aware that these are merely indications, and that large systems should be calculated in each case. Please contact OSO for support in this regard. Apartment buildings Low temp. (HP) High temp. / El. High temp (boiler) Normal apartment Small apartment Pre-heater volume - kw + -units -units Peak heater volume - kw Volume - kw Volume - kw Normal apartment w/bathtub 3 persons. Small apartment w/ shower 1 person. Hotels Low temp. (HP) High temp. / El. High temp (boiler) Luxury hotel Normal hotel Pre-heater volume - kw + -guests -guests Peak heater volume - kw Volume - kw Volume - kw Each room with shower/bathtub 2 persons. OSO Commercial products: 17RE Page 21 Water heater 17RVE Page 22 For boiler etc.. 17RTVE Page 23 For boiler etc.. 17RB Page 24 For heat pump 17R Turbo Page 25 For boiler etc.

21 Maxi Standard - 17RE (SE) - direct electric Connections 1 = CW - 5/4 2 = Temp. - 3/4 or anode 3 = HWC - 3/4 or temp./pt 4 = Temp. - 3/4 or anode 5 = HW - 5/4 6 = Lifting bracket Suitable for most medium and larger sized systems Maxi Standard provides hot water through direct electric heating, integrated in the Maxi Standard s electric central(s). The electric effect can be delivered up to 100 kw, in one or more electric centrals. The electric central is fully built in and insulated. The pressure vessel is manufactured in stainless steel (up to litres), and is designed for pressures of up to 10 bar. The cold water inlet kit, mixing valve kit (if required) and the parallel / series connection kits are assembled directly on the units front. Contact your supplier for more information regarding the kits. Electric immersion heaters are fitted according to customer s specification, in single or three phase supply. High outputs are available. Immersion elements are controlled by independent thermostats each with an individual safety cut-out. Safety relief valve (P&T) 9bar/99 C is included. Stainless steel pressure vessel designed for 10 bar pressure, with 15 kw electric as standard. All valve kits and parallel/ series connections kit are mounted directly in front. Extensive product range up to litres. (From litres and up, inner vessels in Cu lining.) Type - vol. l. - kw Dia x H mm Volume Kg 17RE kW ø 580 x 1600 H 287 l 55 17RE kW ø 580 x 2090 H 380 l 80 17RE kW ø 780 x 1860 H 550 l RE kW ø1000 x 2050 H Available in copper lined steel up to l. 900 l 180

22 Maxi Combi - 17RVE - indirect Connections 1 = CW - 5/4 2 = Temp. - 3/4 or anode 3 = HWC - 3/4 or temp./pt 4 = Temp. - 3/4 or anode 5 = HW - 5/4 6 = Lifting bracket A = Coil flow RVE B = Coil return - 1 H A B D Integrated stainless steel coil with electric backup Maxi Combi is a good alternative to OSO Turbo system when the system requires less hot water, and an integrated stainless steel coil is sufficient. The Maxi Combi is versatile, due to the standard electric central which can be used for providing hot water in the summer time, or purely as a backup. The pressure vessel is manufactured in stainless steel (up to litres), and is designed for pressures of up to 10 bar. The integrated stainless steel coil, comes with a standard surface area of 0,6 m², for water or steam up to 10 bar. Capacity is 25kW w/δt 50K with water, or 50kW with 7 bar steam. Heating coils are available in larger surface heating areas, such as 1,2 / 2,0 / 2,6 m². The cold water inlet kit, mixing valve kit (if required) and the parallel / series connection kits are fitted directly onto the unit front. Contact your supplier for more information regarding the kits. Electric immersion heaters are fitted according to customer s specification, in single or three phase supply. High outputs are available. Immersion elements are controlled by independent thermostats each with an individual safety cut-out. Safety relief valve (P&T) 9bar/99 C is included. Highly efficient and space saving. Electric backup, which also provides hot water in the summer time. Extensive product range up to litres. (From litres and up, inner vessels in Cu lining.) Type - vol. l. - kw / Coil Dia x H mm Volume Coil conn. Kg 17RVE / 0,6 m² ø 580 x 1600 H 287 l RVE / 0,6 m² ø 580 x 2090 H 380 l RVE / 0,6 m² ø 780 x 1860 H 550 l RVE / 0,6 m² ø1000 x 2050 H 900 l Available in copper lined steel up to l.

23 Maxi Combi - 17RTVE - twin coil Connections A 1 = CW - 5/4 2 = Temp. - 3/4 3 = HWC - 3/4 or temp./pt 4 = Temp. - 3/4 or anode 5 = HW - 5/4 6 = Lifting bracket A = Coil flow - 1 B = Coil return - 1 H B A B D Integrated dual stainless steel coils with electric backup Maxi combi Twin Coil is ideal for Solar Thermal water heating with back up from a conventional boiler. Maxi Combi is versatile with a variety of coil combinations available. The product is manufactured to individual specification. Electric immersion heaters can also be specified, and positioned to the customers requirements.the Maxi Combi is versatile, due to the standard electric central which can be used for providing hot water in the summer time, or purely as a backup. The 17 RTVE can be delivered with a variety of coil sizes to suit your system requirements. Contact your supplier regarding which sizes to choose - see below. Available coil sizes - coil heating area (m²): 0,6 / 1,2 / 1,3 / 2,0 / 2,6 m² Approx coil volume (ltrs).: 2,8 / 5,6 / 6,1 / 8,5 / 11,5 ltrs. The coils can be combined, but not all combinations will fit - consult your supplier. The pressure vessel is manufactured in stainless steel (up to litres), and is designed for pressures of up to 10 bar. The cold water inlet kit, mixing valve kit (if required) and the parallel / series connection kits are fitted directly onto the unit front. Contact your supplier for more information regarding the kits. Electric immersion heaters are fitted according to customer s specification, in single or three phase supply. High outputs are available. Immersion elements are controlled by independent thermostats each with an individual safety cut-out. Safety relief valve (P&T) 9bar/99 C is included. Stainless steel pressure vessel designed for 10 bar pressure, with 15 kw electric as standard. All valve kits and parallel/ series connections kit are mounted directly in front. Available with various coil sizes to suit the requirements of your system. Type - vol. l. - kw Coil surface area / vol. l. Dia x H mm Actual vol. Connections Kg 17RTVE kW See coil sizes above ø 580 x 2090 H 380 l. See illustration 95 17RTVE kW See coil sizes above ø 780 x 1860 H 550 l. See illustration RTVE kW See coil sizes above ø1000 x 2050 H 900 l. See illustration 195

24 Maxi Buffer - 17RB - potable water buffer B 3 Connections 1 = CW l. 1 / others 5/4 2 = Temp. or anode - 3/4 3 = Hw l. 1 / others 5/4 4 = Lifting lug 5 = Anti vacuum - 3/4 A = Ret. HP l. 1 /others 5/4 B = Flow HP l. 1 /others 5/4 H 2 7 A 1 ø Integrated stainless steel coil, with large capacity for solar/heat pump Maxi Buffer functions as a buffer tank for large heat pumps / solar collectors, on medium sized to larger systems. In systems requiring large heat transfer capacity from the heat source (often low temperature), the Maxi Buffer is ideal. The unit pre-heats the domestic cold water, and lowers return temperature to the heat pump or solar collectors, thereby increasing efficiency. Maxi Buffer ensures that the heat pump / solar collectors have optimal working conditions, and provides stable temperature for the system. The 17RB 600 and litres units has a coil of a massive 4,1 m². This enables the Maxi Buffer to suit both medium- and larger sized systems. The units have double sets (4 pcs.) of flow / return connections (5/4 ), which provides all possible options for the system. Series or parallel connections provides flexibility if the system should need more solar collectors. The pressure vessel is manufactured in stainless steel, and is designed for pressures of up to 10 bar. Stainless steel inner pressure vessel designed for 10 bar, outer pressure vessel 2,5 bar with 15 kw electric as standard. All valve kits and parallel/series connections kit are mounted directly in front. Extensive product range up to litres. (From litres and up, inner vessels in Cu lining.) Type. ca. l. - coil surface area / vol l. Dia x H mm Suited for Conn. coil Conn. tank Kg 17RB 600 4,1 m² / 18 ltrs. ø 780 x 1900 H Heat Pump/solar heating 1 4 x 5/ RB ,1 m² / 18 ltrs. ø1000 x 2100 H Heat Pump/solar heating 1 4 x 5/4 240

25 Maxi Turbo - 17R (S) - with plate heat exchanger Connections 1 = CW - 5/4 2 = Temp. - 3/4, or anode 3 = HWC - 3/4 or temp. 4 = Temp. - 3/4, or anode 5 = HW - 5/4 A B = 1 (2 above 250kW) 17R Highly efficient for high temperature heat sources Maxi Turbo is suitable for systems with external, high temperature heat source above 100 kw. The Maxi units utilizes a stainless steel plate heat exchanger kit, with dual pumps for additional safety, cold water inlet set, and a mixing central. The Maxi Turbo system is extremely efficient, space saving and cost efficient. Cold water is pumped from the accumulator bottom through a plate heat exchanger (Alfa Laval) and a control valve, which regulates water temperature from cold to approximately 80 C. The accumulator tank is being charged with hot water from the top of the unit. When hot water usage is limited, the plate heat exchanger heats the water directly to the consumer. When there is larger hot water demand than the plate heat exchanger can provide, the remainder of consumption is being sourced from the accumulator(s). If the system has been depleted of available hot water, the Turbo system provides hot water immediately through the heat exchanger. Since the system is totally dependent on functioning pumps, the Turbo kit has 2 separate pumps, with non-return valves and stop valves, for backup. Highly efficient and space saving. The Turbo kit is mounted directly in front, with optional heat exchanger capacity. Extensive product range up to litres. (From litres and up, inner vessels in Cu lining.) Type - vol. l. Dia x H mm Volume Kg Multi conn. set VX/Pump central 17R 300 ø 580 x 1600 H 287 l 55 SRS VX/LP kw 17R 400 ø 580 x 2090 H 380 l 70 SRS VX/LP kw 17R 600 ø 780 x 1860 H 550 l 100 SRS VX/LP kw 17R 1000 ø1000 x 2050 H 900 l 170 SRS S 1500 ø1200 x 2150 H 1480 l S 2000 ø1300 x 2200 H 1830 l S 3000 ø1500 x 2450 H 2650 l S 5000 ø1800 x 2950 H 4890 l 1400 Available in copper lined steel up to l.

26 Termo electric boilers - wet system electric heating Termo Plus Electric central heating Termo RS The OSO Termo boiler is a 100% energy efficient modulating electric boiler using state of the art technology to efficiently heat a property. Termo is a perfect product to heat houses, extension & offices in off-gas areas. With no problems of flue location or oil storage and security Termo provides full flexibility. Termo boilers give quiet operation and require no annual safety certificate. Termo has overheat cut-out, soft start technology, low voltage and air in boiler warning signal, suitable for radiators or underfloor heating. Termo is governed by traditional central heating controls. Power outputs available 7.2kw, 10.8kw, 14.4kw. 240V 50Hz single phase. Termo boilers contain up to 3 immersion elements. These operate in step modulation to match power output with demand and reduce energy consumption. If water heating is also required, OSO recommend fitting Termo as a space heating only boiler and complementing with a direct OSO cylinder (SXD) for the most cost effective, efficient and simple solution. Central heating where mains gas not possible Uses standard single phase power Plus has unique weather compensation system Termo boilers are available in 2 styles and 3 power outputs: Termo Plus is a weather compensated system boiler for space heating only containing expansion vessel & pump. Weather compensation can save up to 15% on annual energy usage through heating curve technology. Termo RS is a traditional central heating boiler to be used either as a space heating only boiler or for use with an S-plan system. Other system components must be supplied separately. Cascade power limiter is also available to limit power usage by Termo boilers where total electrical demand could otherwise exceed the available supply. Product Suited for heating H x W x D mm. Heat curve technology System boiler Guarantee Kg Termo Plus Space only 930 x 330 x 230 Yes Yes 3 years 34,5 Termo RS Space and DHW 750 x 330 x 230 No No 3 years 21,4

27 Guarantee Guarantee - unvented hot water cylinder The OSO stainless steel inner vessel on 20 series/ecoline and Super S cylinders is guaranteed against material defect or manufacturing faults for a period of 25 years from the date of purchase. All other parts including, but not limited to factory fitted electrical elements (damage caused by lime scale excluded), expansion vessel, thermostats and valves are guaranteed against material defects or manufacturing faults for 2 years from the date of purchase. In the event of a replacement component being required OSO Hotwater will supply such part(s) free of charge and freight paid, on condition that the defective component is delivered, freight paid to OSO Hotwater within 2 weeks of written notice being given to OSO Hotwater of the defect. Such replacement parts shall be guaranteed under the terms of this guarantee to the unexpired period of the aforementioned 2 year period. This warranty is conditional upon the OSO cylinder being installed in compliance with the OSO Installation & Maintenace Instructions, all current legislation, codes of practice and regulations governing the installation of unvented hot water cylinders in force at the date of installation and provided that: 1. The water quality shall be in accordance with European Council Directive 98/83 EC, or revised version at the date of installation, and is not fed with water from a private supply. Particular: Chloride content: Max. 250 mg/l Sulphate content: Max. 250 mg/l Combination Chloride/sulphate: Max. 300 mg/l (in total) 2. The OSO cylinder is filled with water before turning the electricity supply on to the heater elements. 3. The benchmark certificate is completed at the time of installation. 4. The OSO cylinder is serviced and maintained every 12 months and is marked as such in the benchmark logbook provided with the cylinder. Invoices for the maintenance work should be kept as proof of regular maintenance. Care should be taken of the logbook and invoices as they serve as the guarantee certificate for the cylinder. 5. If the newly fitted water heater is not in regular use then it must be flushed through with fresh water for at least 15 minutes. Open at least one hot water tap once per week, during a period of at least 4 weeks. 6. The OSO unvented cylinder has not been modified in any way other than by OSO Hotwater and is only used for the storage of potable water. 7. No factory fitted parts have been removed for unauthorised repair or replacement. 8. Defects caused by frost, excess pressure, salt dehardner process, transient voltage, lightning strikes or incorrect installation, repair or use, are not covered by this warranty. A laboratory evaluation of possible defects can be ordered by the user, however the user must pay for this where the above mentioned conditions have not been fulfilled. Evidence of the purchase date and the date of supply must also be submitted with your claim. 9. To validate the warranty the user must complete and return the warranty card supplied accompanied by proof of purchase within 60 days of purchase. Evidence of the purchase date and the date of supply / installation must be submitted. This guarantee does not confer any rights other than those expressly set out above and does not cover any claims for consequential loss or damage. This guarantee is offered as an extra benefit and does not affect your statutory rights as a consumer. Water Supply requirements OSO unvented cylinders operate at 3 bar (controlled by the inlet control set) and are capable of delivering over 50 litres per minute. Unvented cylinders will offer good multi-outlet pressure and flow rate provided the mains supply is adequate. OSO cylinders will operate at lower pressures and flow rates but performance may be impaired. A good static water pressure will not necessarily result in a strong mains flow rate. The maximum possible water demand should be assessed, taking into consideration that both hot and cold services are supplied simultaneously from the mains. If necessary, consult the local water company regarding the likely pressure and flow rate availability. If mains flow rate is poor, the OSO Super- Stream (page 19) should be considered. IF static pressure is low, the OSO charger pump is a possible solution. Wherever possible the water mains supply should be in at least 22mm. ½ (15mm) supplies can give good performance if mains supply is good, however consideration should be given to upgrading existing small bore mains pipework to a larger size if the recommended minimum pressure/flow rate is not being achieved.

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