heating and plumbing products that won’t cost the earth
Intasol combi solar diverter July 2010
Intasol combi solar diverter Description The Intasol is a hot water diverter valve for use with combination boilers or instantaneous water heaters. This means that a solar system can now be linked with a combi boiler as back-up. Cross-flow contamination is eliminated by the clever deployment of solar check valves integrated within the valve.
Intasol combi solar diverter (patented design)
Introduction The Intasol manifold allows unvented hot water heated by solar thermal panels, to be used safely with a combination boiler. The Intasol system automatically harnesses the thermal energy contained in a solar water storage system to provide water at a controlled, optimum temperature. Intasol is supplied complete with a TMV2 thermostatic mixing valve, thermostatic diverting valve, thermostatic blending valve and integral non-return valve. The system ensures that the user always receives hot water at the set temperature, and diverts cold water at 28°C to activate the boiler when the temperature of the water coming from the solar storage cylinder falls below 48°C. Its compact design means that all the valves are housed in the body of the Intasol, and it’s supplied complete with connections suitable for copper pipe. High temperature solar systems The temperature of the domestic water in solar thermal systems can reach very high temperatures over long periods. In Summer, expecially if there is little water usage, the hot water can reach a temperature of around 98°C before the temperature and pressure safety relief valves are actuated. At these temperatures, the hot water cannot be used directly because of the risk of scalding to the user. Water temperatures over 50°C can cause burns very quickly. At 55°C, partial burns occur after 30 seconds immersion. At 60°C, they can occur in as little as 5 seconds. Intasol incorporates a TMV2 thermostatic mixing valve which blends the hot and cold water to deliver blended water at a safe temperature for users.
Intasol combi solar diverter Technical specification Connections: Body material: Shutter: Spring:
15mm compression for copper tube DZR copper alloy BS EN 12164 CW602N UDEL GF-120NT Stainless steel AISI 302
Thermostatic mixing valve Maximum working pressure: Adjustment range: Accuracy: Maximum inlet temperature: Maximum inlet pressure ratio (H/C or C/H) Minimum temperature difference between the inlet hot water and the outlet mixed water to ensure anti-scald performance: Minimum flow rate for stable operation:
10°C 6 litres per minute
Thermostatic diverting valve Maximum working pressure: Factory set: Maximum inlet temperature:
10 bar (static), 5 bar (dynamic) 48°C 100°C
Thermostatic blending valve Maximum working pressure: Factory set: Maximum inlet temperature:
10 bar (static), 5 bar (dynamic) 28°C 90°C
Operation example 1: DHWS heated by Solar delivery direct to taps via mix with cold to a safe temperature
10 bar (static), 5 bar (dynamic) 35-55°C ± 2°C 100°C 2:1
Operation example 2: DHWS from cylinder only warm (or cold). Intasol diverts to the combi boiler, heats DHWS and delivers to taps. DHWS is mixed at the Intasol valve to maintain safe temperatures
Intasol combi solar diverter Schematic diagrams Optimum solar conditions
Hot water return Cold water to from boiler Boiler (no flow)
Non-return valve and filter in connector Blending valve closed
Non-return valve and filter in connector Cold water supply
Diverting valve - flow to thermostatic mixing valve Thermostatic mixing valve
Non-return valve Non-return valve and filter in connector
Mixed water to user
Cold water to outlets and unvented cylinder supply
Poor solar conditions, night or solar hot water store is depleted.
Hot water from Solar Cylinder
Hot water return from boiler
T > 48°C
Cold water to Boiler
T > 48°C
T = 28°C
Non-return valve and filter in connector Blending valve mixes water to 28°C
Non-return valve and filter in connector Cold water supply
Diverting valve - flow to balancing valve Thermostatic mixing valve
Non-return valve Non-return valve and filter in connector
Cold water to outlets and unvented cylinder supply Inactive
Mixed water to user
Hot water
Hot water from Solar Cylinder
Cold water
T > 48°C
Blended water
Intasol combi solar diverter Typical circuit using Intasol
Features Non-return valve
Thermostatic mixing valve
Thermostatic blending valve
Thermostatic diverting valve
Cold water Col inlet connection inl
Outlet connection to bath, basins & shower
Inlet connection from solar cylinder
Reverse view
The Intasol manifold should preferably be installed close to the boiler, on the outlet from the solar hot water storage, to ensure a constant temperature of mixed water is supplied to users.
Cold/mixed water connection to boiler
Hot water return connection from boiler
40.5
117 16.5
Given the flow characteristics of the integral thermostatic mixing valve, Intasol can be used for a single outlet, eg; washbasin, shower or for multiple outlets. To ensure that the mixed water is supplied at the set temperature, a minimum flow rate of 6 litres per minute is required.
40 24
The installation of thermostatic mixing valves must comply with the requirements of the Water Supply (Water Fittings) Regulations 1999.
Outlet to boiler Boiler return with filter and non-return connection valve 40 53 50 16
164
To ensure that maintenance, commissioning and testing can be undertaken easily, the manifold must be installed in an accessible position.
60
The manifold should be fitted in a circuit similar to the one illustrated above.
Cold water inlet with filter and non-return valve
41 User outlet connection
62 Solar return with filter and non-return valve
Intaeco Limited Airfield Industrial Estate, Hixon, Stafford ST18 0PF t: 0870 220 9666 f: 01889 272181 e:
[email protected] w: www.intaeco.co.uk
