Twin Coil Solar Cylinder - Standard Specification (Insulated)
Newark Solar Flowback Vessel - Replacement for Filsol Drainback Vessel
Twin Coil Solar Cylinder - Standard Specification Drawing
• For use in Domestic Properties
• For use with solar, solid fuel and boiler appliances
The Newark Copper Cylinder Co Ltd has manufactured solar cylinders for approximately 25 years. Over this time we have developed a wide range of solar cylinders, with different combinations of features including:
• Vented/ Unvented Single Coil Solar Cylinders
• Vented/ Unvented Twin Coil Solar Cylinders
• Vented/ Unvented Triple Coil Solar Cylinders
• Solar Thermalstores
• Vertical Solar Cylinders
• Horizontal Solar Cylinders
Our twin coil and triple coil solar cylinders are specifically designed to work in conjunction with the domestic heating system. The additional coils are designed to transfer heat from a more traditional heating source, for example, a domestic boiler and/or solid fuel boiler. The solar coil, which is manufactured from high efficiency finned tube with a large surface area, transfers heat from the solar panels into the solar hot water cylinder.
The boiler coil which (if fitted) is manufactured to BS 1566, can also be supplied as high recovery to reduce boiler cycling. Cylinder connection sizes can be specified as 22mm or 28mm compression. Our high efficiency 1.6m2 solar coil is fitted with 15mm or 22mm compression and with all connections protruding beyond the insulation, this makes our twin or triple coil solar cylinder one of the most efficient manufactured in the UK.
Manufactured in accordance with the relevant British Standards and in compliance with Part L of the Building Regulations, these cylinders combine a high performance heating coils with low heat loss, factory applied insulation, to provide a highly efficient and effective way to store and provide domestic hot water. Our polyurethane foam lagging can, in most cases, be applied up to a thickness of 75mm and is the most environmentally friendly type available, with an ozone depletion potential of zero and a global warming potential of one. For a more aesthetically pleasing finish, we can offer a steel case with a metallic finish.
Solar Cylinders are available as Vented Cylinders, Unvented Cylinders, or Thermalstores. They can also be manufactured as Combination Units if the property has limited head room and the installation of a separate feed and expansion tank is going to prove difficult. Each unit can come complete with immersion heater(s) and a drain valve. Other options are also available to meet customers' particular needs, including Economy 7 specification and additional connections (e.g. for shower supply).
Matching customers' requirements is particularly important when space is at a premium, so the most common customisation for a hot water cylinder, is the “mixing and matching” of the various heights and diameters that we offer. As additional parts of a Bespoke design, the customer is able to specify a number of options including coil sizes (where applicable), connection sizes/positions, insulation thickness, whether it is manufactured from copper or stainless steel (see our Copper vs. Stainless Steel page for a comparison), and the finish of the unit (the silver metal case being the premium option). We can offer design drawings prior to manufacture to ensure that all connection sizes, positions and functions are to the customer's requirements.
Twin coil cylinders are available in a range of heights (from 1050mm to 2000mm) and to the specific diameters listed below (all sizes stated are excluding insulation):
For Diameters in non-standard sizes (300,350,375,600)
please contact us.
300mm, 350mm, 375mm, 400mm, 450mm, 500mm, 600mm
Variable height from 400mm to 2000mm
Copper Grading Options
Grade 1 (25mtr Mwh), Grade 2 (15mtr Mwh) and Grade 3 (10mtr Mwh)
Shell Connection Sizes Available
1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 15mm, 22mm, 28mm
50mm to 75mm
Coil Heating Surface (Indirect)
Relative to cylinder size (General Guidance - 25 minute recovery)
Coil Working Pressure (Indirect)
Shell Connection Sizes Available
1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 15mm, 22mm, 28mm
3/4", 1", 1 1/4", 1 1/2", 2", 22mm, 28mm
Coil Connection Sizes Available
Cylinder height is specified from the base of the cylinder to the highest part or the dome excluding port connections and insulation.
Cylinder diameters are specified excluding port connections and insulation material. Only listed diameters are available. For the total diameter of a cylinder including insulation, use the following formula; Insulation Depth x 2 + Cylinder Diameter = Total Diameter, or to find the replacement cylinder diameter , please refer to our online cylinder calculator.
Nominal 50mm insulation is recommended though custom depth can be specified between 35mm and 75mm
Material grade relates to the working head and metal thickness, i.e. distance between the feed tank’s water level, and the draw off point on top of the cylinder. Grade 3 is standard for most properties whereas Grade 1 and 2 are used for higher working heads or for longevity of the cylinder.
This is the top centre connection on the dome of the cylinder, there are a wide variety of connection sizes and its worth taking the time to read our Connection Size List before ordering a cylinder, if you are unsure then the simplest option is to specify the cylinder with 22mm or 28mm connections already attached to the cylinder, avoiding additional costs by having to use tank connectors. If a surrey flange is being used, the requirement of a 1" female connection must be specified.
All female connections are parallel BSP thread and taper fittings must not be used.
The connection size for the top entry immersion heater is 2¼" BSP female. An encoloy immersion is advised for use in hard water areas or for longevity. For particularly aggressive water conditions such as high chlorine or acidity, a titanium immersion heater is advised.
This can be specified rather than the use of a Surrey flange or Essex flange and is generally positioned in the upper part of the cylinder and fitted with an internal air ingress prevention device. All compression fittings come with cap nut and olive, avoiding additional costs of tank connectors.
A secondary hot water return connection is generally specified on systems with long pipe runs to wash facilities. Secondary return circuit provides hot water on demand and avoids wastage of cold water, eliminates dead legs in the system and reduces the risk of legionella. This system must be powered by a bronze circulating pump.
Boiler flow and return are connections that are fed from a heating appliance such as a boiler, wood burner or range type cooker. It is most important to specify 1" or 28mm connections and upwards for gravity flow and return circuits to ensure no airlocks occur within the internal coil of the cylinder (Please specify gravity flow and return in the additional information box if necessary).
The connection port is a ½" Female connection that allows for a screw in pocket that is supplied with the boiler control stat, usually specified as aqua control thermostat. This allows for more accurate control of the water temperature and is more efficient than the traditional strap on type control thermostat.
This is the bottom feed connection on the side wall of the cylinder, there are a wide variety of connection sizes and its worth taking the time to read our Connection Size List before ordering a cylinder, if you are unsure then the simplest option is to specify the cylinder with 22mm or 28mm connections already attached to the cylinder, avoiding additional costs by having to use tank connectors
The connection size for the mid entry immersion heater is 2¼" BSP female. An encoloy immersion is advised for use in hard water areas or for longevity. For particularly aggressive water conditions such as high chlorine or acidity, a titanium immersion heater is advised.
The connection size for the bottom entry immersion heater is 2¼" BSP female. An encoloy immersion is advised for use in hard water areas or for longevity. For particularly aggressive water conditions such as high chlorine or acidity, a titanium immersion heater is advised.
Positioned low down in the body and is used to circulate a fluid from the solar panels on the roof through the coil heating the tank.
Two are positioned on the unit, one high up and one low down 75mm above the bottom solar coil connection and used for placing solar probes into the tube which are inserted into the core of the cylinder.
Opposite side primaries are generally used in old systems and are very rarely encountered any more, these units can be confusing to determin due to the flow connection being on one side and a return connection positioned on the opposite side.
Self explanatory. Please avoid using a drain with a tapered thread or over packing with PTFE Tape.
This is the position specified looking down from above the cylinder as shown on the 'Plan View', 12 O'Clock being at the rear.
Hot Water Draw Off
Top Entry Immersion
Boiler Flow & Return
Boiler Control Stat
Mid Entry Immersion
Bottom Entry Immersion
Solar Stat Pockets
Opposite Side Primaries
To assist with determining the correct size connection for replacement units or units to fit your current system, we have created a table of external and internal thread sizes.
Uninsulated Diameter Calculator
This calculator is designed to assist the specification of a cylinder by determining the amount of hot water available from a cylinder of a specific size; this can be particularly useful in situations where space for a cylinder is limited.
This calculator is designed to assist the specification of a cylinder by determining the size of the cylinder from it's circumference and insulation thickness; this can be particularly useful in situations where a replacement cylinder is required, but due to the insulation it is difficult to determine the size of cylinder required.
Please note - The final figures are approximate and should be rounded to the nearest standard diameter (375,400,450 etc.)
PRODUCT OPTIONS & UPGRADES
SIZE & SPECIFICATION
Northern Road Industrial Estate
Tel: 01636 678 437
Fax: 01636 678 964
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