Unvented water heaters

OSO Hotwater UK Unvented water heaters 145997-03 UK 10-2014 Superior stainless steel quality Made in Norway

Key advantages World Class Manufacturing Made in Norway Superior Stainless Steel Quality MINIMUM HEAT LOSS OSO is engaged in continuous improvement to our ECO Foam insulation. This environmentally friendly (uses water as blowing agent) insulation solution provides optimum heat-retention capabilities. The insulation capacity is improved by 30% from previous materials. For an average household this means a reduction in energy use of approx. 450 kwh annually when switching to an OSO product. EXTREMELY LOW WEIGHT As the first water heater manufacturer in Scandinavia OSO started utilizing a strongly improved stainless steel alloy offering higher corrosion resistance and lower weight. The material s high tensile strength enables us to use less raw material, and still achieve high strength and extremely low weight. C Kg Product advantages HIGH EFFICIENCY AND CAPACITY OSO water heaters are designed for a long lifespan with a primary goal to offer energy efficient products. The water temperature of direct Super Series water heaters is higher than most others, at 70 C. Higher temperature means more hot water available in a smaller unit. Combined with very low heat loss figures makes OSO water heaters the most energy effective, offering up to 20 % more hot water than the competition. HIGH CORROSION RESISTANCE The combination of laser welding technology, high grade stainless steel alloys and unique self developed welding procedures results in water heaters with an extremely high resistance to corrosion. A unique technology for reducing oxydation in the welding zone results in products that are suited for most water qualities. EXTREME SAFETY OSO performs extraordinary safety tests for all products. New designs are stress and performance tested equivalent to the total life span of the product before approval. All vessels are pressure tested to 2x the standard operating pressure and all electric components are submitted to a final 100% test. All incoming steel supplies are continously tested in our own laboratory to ensure they are delivered to specification. ENVIRONMENTALLY CORRECT PROCEDURES Environmental awareness has been at the centre of all OSO manufacturing and product development through more than 50 years. Stainless steel is one of the most recycled materials in the world, with an average of 80% being re-used. Our production of approx. 150,000 water heaters annually does not cause any harmful emissions, and are manufactured from more than 60% recycled materials. EXPERIENCE OSO was the world pioneer in mass production of stainless steel water heaters in 1969. More than 3,5 million water heaters has since shown an exceptional reliability and life span economy. Our target that any new development must result in an improvement for our customers has resulted in a vast base of experience, which through 50 years has made us world leader on quality, lifespan economy, reliability and design. 25 YEAR GUARANTEE OSO stainless steel pressure vessels are guaranteed free of material and manufacturing defects for 25 years from the date of purchase. All electric equipment and valve gear is guaranteed for 2 years by OSO. (Terms & conditions apply - see page 27). ISO 9001 + 14001 OHSAS 18001 25 2

C O N T E N T S Key advantages with OSO products 2 Page Indirect water heaters Super Coil - SCI - advanced design 4 Ecoline Indirect - RI 6 Ecoline Twin Coil - RI TC / Solar Direct - RI SD 8 Ecoline GEO - RI HP - heat pump 9 Optima Coil - EPCI - integral HP cylinder/buffer 10 Slimline Indirect - RI 11 PowerCyl - F1 - high pressure & flow 12 Direct electric water heaters Super Xpress - SXD - pre-plumbed 14 Mini - RM5 - under-sink 16 Slimline Direct - RD 17 Peripherals SuperStream - OSI - accumulator boost 13 Accu - 50R &RC - buffer 18 SuperJig - SJ - converts SCI to pre-plumbed 19 OSO spare parts 20 Termo Boilers - Plus / RS - electric boilers 21 Commercial water heaters Choose your commercial heater 22 Maxi Standard - 17RE (SE) - direct 23 Maxi Combi - 17RVE - indirect 24 Maxi Combi Twin Coil - 17RTVE 25 Maxi Buffer - 17RB 26 Product 27 RoHS 2002/95/EC 3

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 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 4

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 650 mm 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 Fast recovery heating coils and low heat loss Super space efficient with low height & 650 mm cupb. width Insulation El. element Thermostat Mixing valve Safety valve Tank 25 yrs *- parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 60 C) Preset 60 C 10 bar/95 C - factory fitt. 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. Kg SCI 120-3 kw/1x240v+coil 0,.5 m² 1-2 pers. ø580 x 870 H ø22 mm / ø22 mm 1.06 kwh 162 litres 2.5 17 32 SCI 150-3 kw/1x240v+coil 0.9 m² 2-3 pers. ø580 x 1050 H ø22 mm / ø22 mm 1.30 kwh 226 litres 3.5 11 40 SCI 180-3 kw/1x240v+coil 0.9 m² 3-4 pers. ø580 x 1160 H ø22 mm / ø22 mm 1.45 kwh 257 litres 4.0 13 43 SCI 210-3 kw/1x240v+coil 0.9 m² 4-5 pers. ø580 x 1300 H ø22 mm / ø22 mm 1.61 kwh 312 litres 5.0 15 46 SCI 250-3 kw/1x240v+coil 0.9 m² 5-6 pers. ø580 x 1550 H ø22 mm / ø22 mm 1.91 kwh 397 litres 6.5 19 49 SC 300** - 3 kw/1x240v+coil 0.9 m² 6-7 pers. ø580 x 1750 H ø22 mm / ø22 mm 2.13 kwh 475 litres 7.5 22 50 **300 litre unit provided with wall mounted expansion vessel *5 min. showers at 12 lpm 5

Ecoline Indirect - RI - high quality generic style cylinder Ecoline has been designed to operate with any boiler. Many modern boilers now have a thermistor probe to connect into the hot water cylinder. Ecoline contains a traditional thermostat with cut-out and also connection point for thermistor. Dogleg coil Indirect water heating with electric back-up The Ecoline is an indirect high performance unvented cylinder with all the quality you expect from OSO but at a competitive price point. Ecoline has been designed to operate with any central heating boiler the cylinder can interact with the boiler either by traditional thermostat or resistance thermistor. Ecoline is supplied with a dog leg coil that reaches all the way to the bottom of the cylinder and heats the entire water content. Many other cylinders have straight-through coils that will not heat the bottom 15% - 20% of the cylinder. Manufactured from high grade stainless steel, and carrying a 25 year guarantee, the OSO Ecoline cylinder has wide appeal through competitive pricing coupled with a host of product advantages. The cylinder boasts very low heat losses through use of the latest generation of foam insulation. The heat loss performance, which is considerably better than most competitors, is achieved using the latest technology in foam insulation and not only save householders on their energy bills, but also assists housebuilders to achieve ever more stringent energy efficiency requirements. Competitively priced Fast recovery heating coils and low heat loss Compact in dimension - offers more room in cylinder cupboard for airing space Insulation El. element Thermostat Exp. vessel Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 60 C) External 10 bar/95 C - factory fitt. Ecoline is extremely compact. With a diameter of 580mm, cylinder heights are typically 20 30cm lower than rival units, enabling more room in the cylinder cupboard to create airing space. 6

Elbow/drain cock >> included in G3 fittings pack - allows the cylinder to be fully drained when required. Thermistor clip >> The OSO Ecoline is prepared for fitting the thermistor from any central heating boiler. A thermistor clip is factory fitted in the electric box as shown. Clean welding >> OSO has developed a highly advanced oxygen free welding method that ensures continous high quality welds., increasing vessel lifespan Supplied with a full G3 fittings pack The range of 6 indirect cylinders from 120 to 300 litres is supplied with a full G3 fittings pack including an elbow/drain cock. Other cylinders do not supply this vital component, and the OSO product not only saves time and money for the plumber, but creates a neater installation that allows the cylinder to be fully drained if required. Ecoline will store and deliver water at a 3 bar pressure*, with maximum working pressure set at 6 bar and a further factory fitted temperature and pressure relief set calibrated to 10bar/90 C. Fittings are supplied by Reliance Water Controls, offering reliability and consistent performance. Ecoline has back-up heating with a 3 kw immersion heater threaded into the heating coil. The cylinder is supplied as a fully flooded design with a potable water expansion vessel supplied with the package. 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. *dependent upon incoming mains supply Full G3 fittings pack including an elbow/drain cock Factory fitted 3 kw electric backup immersion heater Fully flooded design - potable water expansion vessel included with the package Insulation El. element Thermostat Exp. vessel Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 60 C) External 10 bar/95 C - factory fitt. 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. Kg RI 120-3 kw + coil 0.5 m² 1-2 pers. ø580 x 730H ø22 mm / 3/4 1.08 160 l. 2.5 15 30.5 RI 150-3 kw + coil 0.8 m² 2-3 pers. ø580 x 910H ø22 mm / 3/4 1.30 223 l. 3.5 17 38.0 RI 180-3 kw + coil 0.8 m² 3-4 pers. ø580 x 1020H ø22 mm / 3/4 1.44 253 l. 4.0 20 40.5 RI 210-3 kw + coil 0.8 m² 4-5 pers. ø580 x 1160 H ø22 mm / 3/4 1.59 307 l. 5.0 23 44.5 RI 250-3 kw + coil 0.8 m² 5-6 pers. ø580 x 1410 H ø22 mm / 3/4 1.87 391 l. 6.5 29 51.5 RI 300-3 kw + coil 0.8 m² 6-7 pers. ø580 x 1610 H ø22 mm / 3/4 2.08 468 l. 7.5 35 56.0 *5 min. showers at 12 lpm 7

Ecoline Twin Coil - RI TC / Ecoline Solar Direct - RI SD 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. Ecoline Solar Direct Ecoline Twin Coil Solar Direct Twin Coil Top View Providing free solar heated hot water The Ecoline Solar Direct is a purpose-designed solar ready unvented cylinder, providing high solar input from the large heating coil and substantial dedicated solar volume. The Solar Direct has back-up heating with twin electric immersion heaters. High performance fully flooded design, with expansion vessel supplied with the cylinder. The Solar Direct is able to provide up to 60% of annual domestic hot water requirements from free solar energy captured by roof panel collectors. Large heating coil(s) spcifically designed for solar collectors Low heat loss from OSO ECO Foam insulation. High dedicated solar volume. The EcolineTwin 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. OSO Solar cylinders are able to provide up to 60% of annual domestic hot water requirements from free solar energy captured by roof panel collectors. Ecoline Twin Coil contains a large high efficiency solar coil in the base. Solar or heat pump installations using the Ecoline can be eligible for government backed Renewable Heat Incentive. Ecoline RI SD and TC are ideal for connection with all types of solar collectors and should be connected with a differential controller to complete a high performance system. Both are supplied with twin bosses and dry pockets at low and high levels for insertion of temperature sensor probes. Expansion vessel supplied. 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 250-3+3 kw/1x240v+coil 0.8m² 2-3 persons 97 ltr ø580 x 1400 H ø22 mm / 3/4 2.09 kwh 381 litres 53 RI SD 300-3+3 kw/1x240v+coil 0.8m² 3-4 persons 97 ltr ø580 x 1600 H ø22 mm / 3/4 2.29 kwh 453 litres 56 RI TC 200-3kW/1x240V+coil 0.8+0.5m² 2-3 persons 97 ltr ø580 x 1150 H ø22 mm / 3/4 1.86 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 2.15 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 2.35 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 2.89 kwh 538 litres 83 8 Insulation El. element Thermostat Exp. vessel Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 60 C) External 10 bar/95 C - factory fitt.

Ecoline GEO - RI HP - heat pump cylinder with electric booster 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. 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. Specifically designed for airsource or ground-source heat pumps up to 14 kw Immersion heater for boosting temperature from heat pump unit 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. GEO 150 is suitable for heat pumps up to 6 kw and has a 14m 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 50-60 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. OSO ECO Foam insulation and 25 year guarantee Insulation El. element Thermostat Exp. vessel Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 60 C) External 10 bar/95 C - factory fitt. 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 150-3 kw/1x240v+coil 1.0m² 2-3 pers. 4.4 ltrs. ø580 x 900 H ø22 mm / 3/4 20.9 223 ltrs. 1.66 kwh 45 RI HP 200-3 kw/1x240v+coil 1.4m² 2-3 pers. 6.2 ltrs. ø580 x 1150 H ø22 mm / 3/4 26.9 253 ltrs. 1.86 kwh 49 RI HP 250-3 kw/1x240v+coil 1.8m² 2-3 pers. 8.0 ltrs. ø580 x 1400 H ø22 mm / 3/4 29.7 332 ltrs. 1.93 kwh 55 RI HP 300-3 kw/1x240v+coil 1.8m² 3-4 pers. 8.0 ltrs. ø580 x 1600 H ø22 mm / 3/4 27.1 398 ltrs. 2.13 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 Heat pump EPCI 360 The ideal choice for heat pump & space heating 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 space heating temperature in the buffer tank transfers significant heat upwards into the domestic hot water tank through the cylinder, thereby reducing return temperature to the heat pump and maximizing COP whilst providing a valuable and efficient pre-heat to the domestic hot water. 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. All in one solution with minimum heat loss and considerable space saving Maximizes COP for heat pumps up to 14 kw - improves working conditions Higher domestic hot water producton - electric backup Insulation El. elements Thermostat Exp. vessel Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 60 C) External 10 bar/95 C - factory fitt. 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 360-3+3kW/1/3x240V+coil 1.8m² 3-4 persons ø580 x 1900 H ø22 mm / 3/4 8.0 ltrs. 27.6 332 litres 2.90 kwh 86 *Tested to BS EN 12897 10

Slimline Indirect - RI - for tight spaces Perfect for tight and narrow spaces The Slimline is the slimmest domestic cylinder available at only 430 mm diameter, making the cylinder ideal for installation 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. 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 and compact cylinder for easy handling and installation Short heat-up time from large coil OSO ECO Foam insulation and 25 year guarantee Insulation El. element Thermostat Exp. vessel Safety valve Tank 10 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 1 thread 40-70 C (preset 60 C) External 10 bar/95 C - factory fitt. 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 2.06 kwh 20 mins 46 11

PowerCyl - RI F1 - for higher pressures and flow rates The OSO PowerCyl is well suited for use with the SuperStream accumulators, see page 13. 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 6 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. PowerCyl cylinders are supplied with an adjustable pressure reducing valve to be set between 1 and 6 bar. This enables the cylinder to supply showers requiring very high pressures and to locate the cylinder at low level and enable water to be been sent to higher floors and maintain good pressure at the outlet. Oversized expansion vessels are supplied to cope with the higher pressures involved. 1 hot and cold connections can deliver nearly double the flow rate of a standard cylinder. PowerCyl is ideal where multiple showers/baths are fitted in the property. It is often used in light commercial situations such as hotels/guesthouses and can be banked together to increase capacity and flow rate. Where mains flow rate is insufficient, Power- Cyl is a perfect partner to the SuperStream system described opposite. PowerCyl is designed to be supplied by mains water, but can equally work with boosted water from a break tank and pump set. 1 hot and cold connections for larger households Adjustable pressure reducing valve up to 6 bar Large heating coils for fast heating times Insulation El. element Thermostat Exp. vessel Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 60 C) External 10 bar/95 C - factory fitt. 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 / vol. Suited for Dia x H mm Conn. cw/hw - f/r Hw cap. 40 C Heat loss/24h. Kg RI F1 250-3kW/1x240V+coil 0.9m² / 4 l. 5-6 persons ø580 x 1400 H 1 female / 3/4 397 litres 1.91 kwh 56 RI F1 300-3kW/1x240V+coil 0.9m² / 4 l. 6-7 persons ø580 x 1600 H 1 female / 3/4 475 litres 2.11 kwh 68 RI F1 380-3kW/1x240V+coil 0.9m² / 4 l. 7-8 persons ø580 x 2090 H 1 female / 3/4 590 litres 2.65 kwh 91 12

SuperStream - OSI - Accumulator stores cold water to boost flow Charger > Cutaway view For exceptional flow rate performance 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 and Ecoline 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. When mains pressure is low, the OSO Charger pump (WRAS approved) will raise water pressure in the property to increase water outlet performance. SuperStream requires an additional purchase of an Upstream Kit which is supplied separately in 22m or 28mm to connect to the cold mains and hot water cylinder. Boosts performance for poor mains supply No moving parts - silent and reliable Proven performance over 20 years Perfect with PowerCyl F1 Construction Bladder Pre-charge Boost pressure Connection kit < Valves 5 years* Composite shell Virgin butyl CE / WRAS 1.4 bar 3.5 bar Supplied Product code Nominal capacity Water capacity* Dia x H mm Weight empty Water connection OSI 130 130 65 ø 418 x 1227 H 16 1 BSP male OSI 200 200 100 ø 542 x 1098 H 22 1 ¼ BSP male OSI 250 250 125 ø 542 x 1303 H 27 1 ¼ BSP male OSI 350 350 175 ø 614 x 1448 H 35 1 ¼ BSP male OSI 450 450 225 ø 614 x 1831 H 46 1 ¼ BSP male *at 1,5 bar differential pressure 13

Super Series - SXD - direct cylinder with twin 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 14

Super Xpress - SXD - fully pre-plumbed unit Unique pioneering design - all pipes 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. Pre-plumbed - faster, cheaper installation 70 C storage temperature means 20% more usable hot water -use smaller cylinder Super space efficient with low height & 650 mm cupb. width Insulation El. element Thermostat Mixing valve Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 5/4 thread 40-70 C (preset 70 C) Preset 60 C 10 bar/95 C - factory fitt. Product - vol. - kw/phxv Suited for Dia x H mm Conn. cw/hw Heat loss 24 h. Hot water cap. 40 No. of showers* Kg SXD 120-3 kw / 1x240V 1-2 pers. ø580 x 870 H ø22 mm 1.06 kwh 192 litres 3.0 27 SXD 150-3+3 kw / 1x240V 2-3 pers. ø580 x 1050 H ø22 mm 1.30 kwh 269 litres 4.5 34 SXD 180-3+3 kw / 1x240V 2-3 pers. ø580 x 1160 H ø22 mm 1.45 kwh 313 litres 5.0 37 SXD 210-3+3 kw / 1x240V 3-4 pers. ø580 x 1300 H ø22 mm 1.61 kwh 378 litres 6.0 40 SXD 250-3+3 kw / 1x240V 3-4 pers. ø580 x 1550 H ø22 mm 1.91 kwh 480 litres 8.0 43 SX 300** - 3+3 kw / 1x240V 4-5 pers. ø580 x 1750 H ø22 mm 2.13 kwh 574 litres 9.5 45 **300 litre unit provided with wall mounted expansion vessel *5 min. showers at 12 lpm 15

ø200 Mini - RM5 - point of use undersink xpress heater 430 Vv Kv 1 3 RESET 2 4 1 L 2 Hw ø15 Cw 3/8 r TS2 + - RGK The ultimate in simplicity 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 30 60 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 expansion vessel Only 6 minutes heat-up time from cold water to 60 C Ideal for office buildings etc., where there is far between the water heater central and the hot water outlet Insulation El. element Thermostat Power cable Safety valve Tank 10 yrs* - parts 2 yrs Mineral wool CE 1 thread 40-70 C (preset 60 C) Factory fitted 8 bar - factory fitted Product - vol. - kw/ph x V Suited for Dia x H mm Conn. Hot water cap. 40 Heating time Kg RM 5-3 kw/1x230v small cabins etc. ø 200 x 430 H 3/8 +ø15 12 l. + 75 l/t. 6 mins. 7 16 Continous (5-40 C) (10-60 C)

Slimline Direct - RD - the slimmest domestic cylinder available Suited for narrow and 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 and compact cylinder for easy handling and installation Fits in the smallest spaces - only 430 mm diameter OSO ECO FOam insulation and 10 year guarantee Insulation El. elements Thermostats Power supply Safety valve Tank 10 yrs* - parts 2 yrs ECO Foam - water based CE / KIWA 1 thread 40-70 C (preset 60 C) Dual - separate 10 bar/95 C - factory fitt. Product - vol. - kw/ph x V Suited for Dia x H mm Conn. cw/hw Hot water cap. 40 C Heat loss 24 h. Kg 15RD 150-2+2 kw/1x230v 2-3 persons ø 430 x 1610 H ø22 mm 226 l. 2.3 kwh 50 17

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 coil in the 50RC connects to the mains water supply and preheats cold water prior to connection to a hot water cylinder, thus 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 Double sets (4 pcs) of 1 flow/ return connections for multiple installation options Insulation Coil type Coil connection Flow/ret. conn. Safety valve Tank 25 yrs* - parts 2 yrs ECO Foam - water based CE / NEMKO Smooth surface (50RC) 3/4 (50RC) 4-2 x flow + 2 x return 3.5 bar - factory fitted 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 300 - coil 2,6m² / 11 l. Heat accumulation w/coil ø 580 x 1600 H 4x3/4 ø15 mm /ø22 mm 3/4 70 18

Super Jig - SJ - to convert Super Coil to pre-plumbed system Super Jig system layout 1. Boiler flow 2. Pressure gauge 3. Exp. vessel connection 4. Pump 5. Auto Air Valve 6. Zone valve 1 7. Zone valve 2 8. Wiring centre 9. Auto By-Pass 10. DHW heating flow 11. Boiler return 12. DHW 13. Balanced cold 14. Cold feed 15. Filling loop 16. DHW heating return 17. Heating zones return Schematic view > 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 with Grundfos Alpha pump in accordance to minimise energy usage. SuperJig is for connection to heating only boilers & includes a full S-plan heating system, pre-wired wiring centre, touch-screen programmable room thermostats, water heater timer and 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 and also versions for 22mm and 28mm pumps/ primaries. Jigs for system boilers are available in 2015 The developer enjoys security advantages because the cylinder can be fitted at the last moment. System consists of: Heating circulator Pressure gauge Auto air valve Slimline heating expansion vessel Pressure relief valve Non return valve Filling loop Pre-wired wiring centre Pre-formed copper pipes Programmable room stats Water heater timer Flexible drilling points Perfect connection to Super Coil cylinder Sturdy steel back plate Auto by-pass Heating zone valves Unique space saving advantages Allows a full traditional airing cupboard Minimizes installation time Construction Zones Heating system Wall bracket Pump 2 years* Pre plumbed CE Single or twin Full S-plan Supplied Grundfos Alpha 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 550 15.5 22 Super Jig Twin Zone OSO Super Coil SC 600 x 550 17.0 24 19

OSO Spare parts Super Series Ecoline 355030 214005 550853 219005 74000 20 Series 355045 includes REDC 355013, 510505, 214009 REDC 355045 (2.1bar), 320001 (adjustable pressure) 510505, includes 214009 550853 250006 202108 214009 219005 part no. description Super Series spare parts 90412 Drain cock 71259 3 kw immersion heater 71269 4.5 kw immersion heater 91995 Tundish 90231 Pressure reducing valve 91900 Flexible Y hose 90423 Expansion relief valve 8bar 92000 Motorized valve 74090 Lower electric box cover 74095 Upper electric box cover 90232 Mixing valve 91911 Flexible hose to expansion vessel 55085 Temperature & Pressure relief valve 82106 Cable strain relief 115800 Expansion vessel 5.3 ltr 115786 T piece for expansion vessel Ecoline spare parts 92041 Fittings pack 355030 Multibloc 3/6bar 214005 Expansion relief cartridge 6bar 20 Series spare parts C510506 Fittings pack 355045 Multibloc 2.1/8bar REDC 355103 Pressure reducing cartridge 2.1 bar 320001 Adj. pressure rdcn cartridge 1.5-5 bar for old multibloc REDC31205 Adj. pressure rdcn cartridge 1.5-5 bar for 355045/030 REDC355013 Pressure rdcn cartridge 2.1bar for 355045/030 510505 Expansion relief valve 8bar 214009 Expansion relief cartridge 8bar 74000 Electric box cover direct 250440 Commissioning valve 202108 Hose 220 mm 250006 T-piece 15 mm x 1/2 F x 15 mm Ecoline & 20 Series shared parts 550853 Temp. & Pressure relief valve 219005 Tundish 81024 Solar Sensor Pockets 250445 Elbow/drain cock 74060 Electric box cover indirect 92000 Motorized valve Expansion vessels AX12 Expansion vessel 12ltrs AX18 Expansion vessel 18ltrs AX24 Expansion vessel 24ltrs AX35 Expansion vessel 35ltrs Immersion heaters 71259 3 kw 1 1/4 incoloy 71261 3 kw 1 1/4 copper 71269 4.5 kw 1 1/4 incoloy 73450 Box key 50 mm (for above) GW020340 3 kw 1 1/4 titanium 73430 Box key 55 mm (for above) 73410 Box key (for below) 70629 2 kw 1 incoloy (for Slimline) 71210 3 kw 1 incoloy (for RM5) 20

Termo electric boilers - Plus & RS - wet system electric heating Termo Plus Electric central heating 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 RS Central heating where mains gas is not possible Uses standard single phase power Termo Plus has a unique weather compensation system 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. 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 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 Suited for Power output Voltage Elements Energy efficient 3 years Radiators / underfloor CE 7.2-14.4 kw 240V - 50 Hz single ph. 2-3 optional 100% 21

Commercial water heaters - dimensioning Energy source / temperature Water quality Product range Solar collectors Medium Direct electric Normal / (Hard) Maxi Standard 17RE / (Maxi Dublo 18RE) Gas / oil Normal Maxi Coil 17RV Gas / oil / electric Normal / (Hard) Maxi Combi 17RVE / (Maxi Dublo 18RE) Gas / oil / renewable energy source Normal Maxi Combi 17RTVE Renewable energy source Normal Maxi Buffer 17RB Renewable energy source / electric Normal 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 5 8 300-5 + 300-5 400 7.5 300 15 10 17 600-5 + 600 10 800-15 400-30 20 33 900-10 + 900 15 1200-30 800-40 35 60 1200-15 + 1200-15 1600-30 1000-50 45 75 1800-20 + 1800-30 1800-45 1200-60 70 115 2400-30+ 2400-30 3000-60 1600-100 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 20 30 800-5 + 800-5 800-10 600-20 30 50 1000-10 + 1000-10 1200-20 900 30 50 75 1500-20 + 1500-20 1800 30 1200-50 70 100 1800-30 + 1800-30 2400-40 1200-70 120 180 3000-45 + 3000-45 3600-75 2400-110 160 235 4000-60 + 4000-60 4200 100 3000-150 Each room with shower/bathtub 2 persons. OSO Commercial products - overview: 17RE Page 23 Water heater 17RVE Page 24 For boiler etc.. 17RTVE Page 25 For boiler etc.. 17RB Page 26 For heat pump 22

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 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 1.000 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 el. as standard All valve kits and connections fits directly onto the front Extensive product range up to 10 000 ltrs. Units from 1 500 ltrs upwards has Cu inner lining. Tank 25 yrs* - parts 2 yrs Insulation Mineral wool CE / NEMKO El. element 5/4 thread Thermostat 60-90 C (preset 75 C) Connection kits Fits onto unit front P&T safety valve 9 bar / 95 C - included Type - vol. l. - kw Dia x H mm Actual volume Kg 17RE 300-15kW ø 580 x 1600 H 287 l 55 17RE 400-15kW ø 580 x 2090 H 380 l 80 17RE 600-15kW ø 780 x 1860 H 550 l 110 17RE 1000-15kW ø1000 x 2050 H 900 l 180 Available in copper lined steel up to 10.000 l. 23

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 - 1 17RVE B = Coil return - 1 H A B D Integrated stainless steel coil + 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 1.000 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 - also for providing hot water during summer Extensive product range up to 10 000 ltrs. Units from 1 500 ltrs upwards has Cu inner lining. Tank 25 yrs* - parts 2 yrs Insulation Mineral wool CE / NEMKO El. element 5/4 thread Thermostat 60-90 C (preset 75 C) Connection kits Fits onto unit front P&T safety valve 9 bar / 95 C - included Type - vol. l. - kw / Coil Dia x H mm Volume Conn. coil Kg 17RVE 300-15 / 0.6 m² ø 580 x 1600 H 287 l 1 65 17RVE 400-15 / 0.6 m² ø 580 x 2090 H 380 l 1 85 17RVE 600-15 / 0.6 m² ø 780 x 1860 H 550 l 1 140 17RVE 1000-15 / 0.6 m² ø1000 x 2050 H 900 l 1 210 24 Available in copper lined steel up to 10.000 l.

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 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 1.000 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 el. as standard All valve kits and connections fits directly onto the front Available with various coil sizes to suit the requirements of your system Tank 25 yrs* - parts 2 yrs Insulation Mineral wool CE / NEMKO El. element 5/4 thread Thermostat 60-90 C (preset 75 C) Connection kits Fits onto unit front P&T safety valve 9 bar / 95 C - included Type - vol. l. - kw Coil surface area / vol. l. Dia x H mm Actual vol. Connections Kg 17RTVE 400-15kW Optional - see coil sizes above ø 580 x 2090 H 380 l. See illustration 95 17RTVE 600-15kW Optional - see coil sizes above ø 780 x 1860 H 550 l. See illustration 125 17RTVE 1000-15kW Optional - see coil sizes above ø1000 x 2050 H 900 l. See illustration 195 25

Maxi Buffer - 17RB - potable water buffer 5 4 6 B 3 Connections 1 = CW - 300 l. 1 / others 5/4 2 = Temp. or anode - 3/4 3 = Hw - 300 l. 1 / others 5/4 4 = Lifting lug 5 = Anti vacuum - 3/4 A = Ret. HP - 300 l. 1 /others 5/4 B = Flow HP - 300 l. 1 /others 5/4 H 2 7 A 1 ø Stainless steel coil for solar energy / 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 1.000 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. Large integrated stainless steel coil for maximum heat transfer from solar panels or heat pump Ensures optimal working conditions and stable system temperature Suited for medium and larger systems Insulation Coil size System size Flow/ret. conn. Design pressure Tank 25 yrs* - parts 2 yrs Mineral wool CE / NEMKO 4.1 m² - 1 connections Medium / large 5/4 - dual sets Up to 10 bar Type. ca. l. - coil surface area / vol l. Dia x H mm Suited for Conn. coil Conn. tank Kg 17RB 600 4.1 m² / 34 ltrs. ø 780 x 1900 H Heat Pump/solar heating 1 4 x 5/4 135 17RB 1000 4.1 m² / 34 ltrs. ø1000 x 2100 H Heat Pump/solar heating 1 4 x 5/4 240 26

- 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. 27