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Grant Energy ManagementControl SystemsIncludes weather compensation, sequence controllers,low loss headers and zone pumpsReduces heating bills • Environmentally friendly • Suitable for systems up to 165kW • Individually controlled heat circuitsMaximises overall boiler/appliance efficiency • Allows several heating appliances to be combined, including renewable technologiesTailored system concept drawings for both plumbing and wiring available • 5-year product guarantee

Grant profileAt Grant we have been designing andmanufacturing reliable and easy to install heatingproducts for over 35 years. From award winningoil-fired condensing boilers to the latest renewabletechnologies, our heating systems have a reputationfor quality that is second to none.We combine precision engineering, innovation,performance and value for money to producesustainable heating solutions that are trustedby both installers and householders.Quality designThere is never a compromise on quality.We design all of our products so thatyou can be sure that the durabilityand efficiency are sector leading. Wecontinually develop new technologiesand use only the best materials to ensureour products meet all performance andenvironmental standards.Our belief in simple solutionsensures that, while our technology issophisticated, our products are lowmaintenance and easy to install. For ahigh quality, reliable and sustainableheating system, trust in Grant.Heating responsiblyGrant manufacture heating products thatrespond to the challenges of rising fuelcosts whilst protecting our environment.Environmental responsibility is centralto all we do and we continue to developand innovate to produce even moreefficient products that make best use ofour natural resources.We are passionate about developingsustainable, high-performance andaffordable alternatives for heatinghomes into the future.Our guaranteeThe Grant label is a guarantee ofreliability, quality and value. We put ourcustomers first and our independenceensures that we can monitor ourstandards and processes to deliver thevery best quality and service.That’s why, when you order your systemfrom a Grant stockist, you can be sureof a tailored service and excellentaftersales support.2

Control technologyWhy choose a Grant Control System?Fuel prices are increasing year on year and thisis having a major impact on home heating costs.Although the price of fuel cannot be changed,steps can be taken to reduce the amount used.Heating controls hugely affect system performance and efficiency.The correct control system not only makes it easier to maintaina more comfortable temperature within the home, but it keepsheating bills and CO 2 emissions down by using less fuel.Grant has a range of individual control solutions that cleverlywork together to enable heating systems to operate at optimalefficiency, ensuring householders get the best out of theirsystem. These include, weather compensation, sequencecontrollers, zone pumps and low loss headers. The systems aresuitable for individual dwellings, properties with several zones,installations with multiple heat sources or a combination ofdifferent heating technologies.Features:• Reduces heating bills• Easier system installation and commissioning• Environmentally friendly• Suitable for systems up to 165kW• Individually controlled heat circuits• Option to switch the system to hot water priority• Allows a number of heating appliances to be combined,including renewable technologies• Provides boiler lead/lag rotation, equalising appliancerunning times• Maximises overall boiler/appliance efficiency• Tailored system concept drawings for both plumbing andwiring available• 5-year product guarantee01380 736920 | www.grantuk.com3

Grant GEO360 weather compensatorSystems without weather compensationWhen air temperatures in the house fall below thesetting on the room thermostat, a signal is sent forthe boiler to fire and warm the house.Unfortunately a disadvantage of this simple arrangement isthat the thermostat only tells the boiler to turn on or off whenthe house is too cold or too hot, respectively. Some systemsare even installed without a room thermostat (boiler interlock),relying solely on individual thermostatic radiator valves.In either case no consideration is given to maintaining the correctflow and return temperatures that enable a boiler to operate incondensing mode or to any external temperature fluctuations.Systems with weather compensationBoiler flow and return temperatures will be monitored andcontrolled, and the system can react promptly to internal andexternal air temperature changes.Autumn• Room thermostat calls for heat on a cool autumn night• A signal is sent for the control to turn the boiler on and warmthe house• Control uses the outdoor temperature to calculate the watertemperature required by the system• Control operates the boiler to allow the system to heat upto that temperature (using less fuel)WinterThe GEO360The GEO360 (GrantEfficiency Optimiser) isa smart control systemcomprising of a controller,two pipe thermostatstogether with an internaland external air sensor,coupled to a mixing valve.With the informationretrieved through the outdoor air sensor (fitted on a north facingwall) the unit can adjust system water temperature to match aheat output closer to the needs of the home. In fact, the systemwill adapt before it even feels too cold or too hot. In periods ofwarm weather the GEO360 will automatically shut the systemdown until it is needed again.Flow and return temperatures can be pre-set on the controlmodule enabling condensing boilers to operate in condensingmode more often, thereby saving fuel and making the systemmore environmentally friendly.The GEO360 monitors weather conditions throughout the yearregardless of the season. Without the control unit, a heatingsystem does not know if it is a cool autumn night or the coldestwinter day. Therefore it works as if it was always the coldest dayof the year and heats the system water to a maximum temperature.Simple system incorporating aGEO360 weather compensator070e Outdoor sensorsited on north facing wallRoomsensorTwin channelprogrammer10 wayjunction boxRoomstatHeating zone• Room thermostat calls for heat on a cold winter day/night• A signal is sent from the control to turn the boiler on and warmthe houseGEO-360eFlowReturn• Control uses the outdoor temperature to calculate the watertemperature required. This will be higher in colder weather• Control operates the boiler to maximum and modulates theheating system to the desired temperatureCylinderstatBoiler flowsensor2-portvalveFlowMixer sensorMixer pump4 Port mixing valveand actuatorBoilerPrimarypumpReversablemixing valveBoiler return sensorReturnConcept drawing only- not site specific4

Grant GES264 sequence controllerBenefits of a sequence controllerThe Grant 264 sequence controller is designed to manage from2 to 4 heat sources. These may include renewable technologiessuch as air source heat pumps and wood pellet boilers oralternatively oil/gas boilers. The controller is able to cope witha mix of fuels all at the same time. This is achieved by using acommon flow sensor and using the heat sources installed tosatisfy the demand.The water temperature may be weather compensated and usedwith or without hot water priority, depending on the pipeworklayout, pumps and motorised valve set up.When controlling up to 4 appliances the controller will recordthe time run for every heat source/boiler and rotate the firingsequence to provide an equal burn time for all units. This willensure that all appliances share the load throughout the year.Depending on the systemdesign and layout it is possibleto include pump overrun.Primary and hot water pumpscan also be controlled bythe controller.When used in conjunctionwith a buffer/thermal store theweather compensation facilitywill be disabled as the storewould be kept at a constanttemperature. The controlrecognises this as a set point temperature and is preset atcommissioning along with a check of all other parameters.When firing takes place each unit will only run when required,depending on the load placed on the system. This ensuresmaximum efficiency and prevents unnecessary firing andwasted energy.Simple low loss header system incorporating2x heat pumps and 2x zonesTwin channelprogrammer10 wayjunction boxRoomstatHeating zone070e outdoor sensorsited on north facing wallNRVFlowReturnFlow2-PortvalveCylinderstatGES 264ReturnConcept drawing only- not site specificASHP 1NRVASHP 2NRVBoilersensorFlowReturn01380 736920 | www.grantuk.com5

Grant Low-loss headersFeeding heating zonesHeader systems are a cost effective way ofinstalling multiple heat sources and feedingmore than one heating zone which have differenttemperature requirements. This is achievedby using a small low loss header known as ahydraulic switcher and a distributor.Depending on the system load, two sizes are available(up to 70kW and up to 165kW @ ∆ t 20 °C flow and return setup temperature). The heating appliances are then connected tothe switcher, which provides an open circuit for the appliancesystem water to feed the heating distribution header. This canbe supplied with 2 to 6 Grant zone pump kit’s for each heatingand hot water circuit, as required.The Grant low loss header provides the installer and thecustomer with a professional installation which is both costeffective to install and run.Technical specificationMaximum flowrateInsulation boxPump unit connectionHydraulic switcher connectionSide connection70kW headerup to 3m 3 /h, 6bar110 x 110 x 508mm (min) -1508mm (max)(depending on model)1” male1 1 /4” male3/4” femaleTechnical specificationMaximum flowrateInsulation boxPump unit connectionHydraulic switcher connectionSide connection165kW headerup to 7m 3 /h, 6bar152 x 152 x 625mm (min) -1625 (max)(depending on model)1 1 /4” male2” male2” maleWall fixingsThe header is fixed to the wall using a bracket system. Thesecome as a pair (quantity required depends on the size of theunit) and allow a variable gap between the wall and header ofbetween 100mm and 150mm.6

Grant Zone pump kitsSystem circulationZone pump kits are supplied in three pump sizes –6, 7 and 8 metre head. They also come in either aconstant temperature/variable speed or variabletemperature/variable speed and complete with amixing valve and actuator which works with theGEO360 weather compensator.The kits are designed to sit vertically on the header unit with afully insulated compact black cover which house the circulatingpump and valves. The flow and return valves are colour codedto show flow and return with large dial handles with a thermostatdial, giving a clear indication of heating activity.The variable kits shown below have an additional mixing valvewhich is adjusted by a servomotor to mix the flow temperatureto the heating circuit. The servomotor and valve respond to thesensors fitted to the GEO360 weather compensator this will givethe correct comfort level to the property. A non return valve is alsosupplied to prevent reverse circulation, see installation instructions.Zone pump kits (constant temperature) UnmixedComprisesZone pump, isolator ball valves, temperature gauges andnon-return valveConnection sizes1” and 1 1 /4” BSPDimensions250 x 380 x 190mmMaximum temperature 110˚CApplicationFor power up to 50kW and maximum flow 2150 l/hrFlow6m, 7m or 8m circulating pumpZone pump kits (variable temperature) MixedComprisesZone pump, isolator ball valve, temperature gauges andnon-return valve, 3-port mixing valveConnection sizes1” and 1 1 /4” BSPDimensions250 x 380 x 190mmMaximum temperature 110˚CApplicationFor power up to 35kW and maximum flow 1500 l/hrFlow6m, 7m or 8m circulating pump, 3-way mixing valve forweather compensation01380 736920 | www.grantuk.com7

Grant System component identificationSystem incorporating 6x zones (70kW) low lossheader system with 2x boilers070e outdoor sensorsited on north facing wallTwin channelprogrammerHeating zoneRoomstatRoomsensor10 wayjunction box16Heating zoneReturnFlowRoomstatRoomsensorGEO-360e GEO-360e GEO-360e15GES 264FlowCylinderstatHeating zoneReturnRoomstatRoomsensorDHW2-PortvalveFlowHeating zoneReturnRoomstatHeating zoneReturnFlowRoomstatFlow81111 1313 13111D61B17Boil sensorNRVConcept drawing only- not site specificFlowWood pelletboiler 2ReturnNRVWood pelletboiler 18

Diagram referencesDraw No. Part description Further information Product code1 1 1 /4” Hydraulic switcher – 70kW Note: 70kW @ 20˚∆t GHS60/1251B Header bracket set wrap over 100mm Only 1 set per header required GHS/WF1001C Header bracket set wrap over 150mm Only 1 set per header required GHS/WF1501D Header bracket set 90˚ Only 1 set per header required GHS/WFHVGHS70/12522–6 is the number of pump units (circuits)3 1” F&R Distributor * GHS70/12532 1” F&R Distributor *451” F&R Distributor *1” F&R Distributor * per installation as required by the installer(see drawings).GHS70/1254GHS70/12556 1” F&R Distributor GHS70/12567 1 1 /4” connector 2 connectors per switcher GHS056298 1” valves 2 valves per pump station GHS/0266M11 Constant temperature 6m zone pump kit Constant temp, variable speed for heating GHS/CT0112 Constant temperature 6m zone pump kit * hot water primary circuitsGHS/CT0213 Variable temperature 6m zone pump kit For heating circuits only. With mixing valve GHS/VT0314 Variable temperature 6m zone pump kit * used with GEO360 w/compGHS/VT0415 GES264 sequence controller Up to 4 boiler sequence controller &weather compensationGES26416 GEO360 Weather compensator GHS/GEO360* Note: component not shown on illustration01380 736920 | www.grantuk.com9

Grant Concept system with thermal storeAlternative use of energymanagement controlsThis layout shows a system incorporating aThermaWave thermal store, linking a numberof different technologies such as an oil boiler,2 air source heat pumps, a solar thermal system,a GES264 sequence controller and a GEO360weather compensator.Grant ThermaWave storesThe Grant ThermaWave allows multiple heatsources to be connected in a number of differentways. This unit makes it possible to now have agas or oil fired boiler connected to a solid fuelappliance and also a renewable heat sourcesuch as solar thermal or a heat pump. Underfloorheating system manifolds as well as radiatorcircuits can be directly connected to the storeand it has been designed in such a way that itslows inlet water velocities, ensuring multi-leveltemperature distribution.Models are available in three sizes - 250 litres,300 litres and 400 litre, in an open-ventedconfiguration.A separate domestic hot water kit (product code: GTHERM/KIT1)is also available for those situations where domestic hot watersupply is required. Alternatively, where there is a greater hotwater demand the store can be linked to a Grant cylinder(as shown below).System with thermal store incorporating anumber of heat sourcesTwin channelprogrammer10 wayjunction boxConcept drawing only- not site specific070e Outdoor sensorsited on north facing wallRoomsensorRoomstatHeating zoneReturnGEO-360eFlow070e Outdoor sensorsited on north facing wallMixer sensorCentral heating pumpGES264Boiler flow sensorReturnMixerpumpOpen ventFlow4-port mixingvalve & actuatorCylinderstat2-portvalveSolar hotwatercollectorFlowBoiler flow sensorThermal store thermostatGrant SolarcontrollerOilboilerNRVASHP 1NRVASHP 2NRVCF2-Port high temp zone valvewith unvented HW cylinderReturn10

Technical informationInstallationImproper installation and operation of Grant control systemscould result in damage to the equipment and possibly evenpersonal injury. It is the installer’s responsibility to ensurethat the parts are safely installed to all applicable codesand standards.Aftersales serviceFor peace of mind, all Grant control systems are backed bya national network of independent service engineers. In theunlikely event of a problem occurring, the installer shouldtelephone our Customer Service Department on: 01380 736920.GuaranteesGrant Energy Management Control Systems are covered by a5-year guarantee from the date of purchase, subject to beinginstalled in accordance with the Manufacturer’s instructions. Oncompletion of the installation the system must be commissionedand the guarantee registration form completed online.Training AcademyAt our purpose built Training Academy in Devizes we offer awide range of training courses, including Grant product trainingcourses, OFTEC training and assessment and Logic Certificationcourses. Our facilities include air-conditioned lecture rooms andextensive oil burner and ‘renewables’ training and assessmentworkshops. Here our trainees can hone their skills on a full sizetraining roof, working solar thermal and wood pellet boilers,controls, air source heat pumps, thermal store installations,solar thermal training/assessment rigs and unvented hot watertraining and assessment rigs.For further information call: 01380 736943Website downloadsFor further information about the Grant product range or todownload our brochures please visit our website at:www.grantuk.com01380 736920 | www.grantuk.com11

Grant Engineering (UK) LtdHopton House, Hopton Industrial Estate,Devizes, Wiltshire, SN10 2EUT: 01380 736920 F: 01380 736991E: sales@grantuk.com W: www.grantuk.comGCB 05/13 UK