DORCHESTER DR-FC 120 Manuel de service

Purewell VariHeatHigh Efciency, Fully Modulating Boilers Condensing & Non Condensing Cast Iron, Pre-mix, Modular Gas FiredSingle Boiler Outputs 6

10Volt Free Contacts All Purewell VariHeat modules are fitted with a multi-function clip-in module to provide volt free contacts as standard. Remote a

11Options for a single Boiler only Programmable room sensor (QAA73) Outside air sensor (QAC34) 2nd Heating Circuit Clip-in relay kit (AGU2.500) DHW

12Options for Multiple Boilers only Boiler sequencing cascade controller (RVA47) LPB bus communications Clip-in module (OCI420) Programmable room se

13Outside Air Sensor To be used with cascade controller, the optional outside temperature sensor must be wired directly to the cascade controller to

14In practice, heating systems rarely operate at full load conditions and so configuring the system to optimise the part load performance is an effect

15Room Temperature Set Point The required room temperature is set from the cascade controller and the actual room temperature communicated to the casc

16Controls Scheme 1 Purewell VariHeat Boilers Internal Time Clock Controlled System using RVA47These schematics are available to download at www.hamwo

17Controls Scheme 2 Purewell VariHeat Boilers External Switched Remote Enable with RVA47These schematics are available to download at www.hamworthy-h

18Controls Scheme 3 Purewell VariHeat Boilers External 0-10 volt Enabled System with RVA47 %KNVÄRDMRNQThese schematics are available to download at ww

19Controls Scheme 4 Purewell VariHeat Boilers RVA47 Control of Primary Circuit, Time Control of Secondary Circuits using RVA46These schematics are av

2 Energy saving high efficiency performance Models for 11°C ∆t and 20°C ∆t systems Robust cast iron heat exchanger Simple design, reliable performance

20I. Gas E. PublicationsIGE/UP/1 Soundness testing and purging of industrial and commercial gas installations.IGE/UP/1A Soundness testing and direct p

21Water Systems Purewell VariHeat boilers are suitable for both open vented or sealed pressurised systems. Sealed systems must comply with Health and

System HeadGuidance Note PM5 Health and Safety ExecutiveThis note states that "hot water boilers should have an automatic control apparatus to cu

23Primary Circuit Pump Purewell VariHeat Boilers Pumps for circulation through the boilers should be sized according to the flow rate and pressure lo

24Electrical Connections There is a gland plate fitted to the front of the boiler, at floor level, to accept cables for power supply and controls. A

25Controls Installation The RVA46 and RVA47 controls are designed for panel mounting. It is recommended that the controls are mounted with the fascia

26Flues from Hamworthy The Masterflue MF system from Hamworthy is a modular, twin wall, insulated, fully welded flue solution, optimised for high eff

27Flue System for Individually Flued Single Boilers Only The table below provides a guide to the maximum flue length allowed for each boiler using 100

Customer Service CentreHamworthy Heating Limited Fleets Corner, Poole, Dorset BH17 0HH Telephone: 0845 450 2865Email: [email protected]:

3SpecificationPurewell VariHeat Natural GasHamworthy have designed the Purewell VariHeat to retain all the benefits of traditional boilers, but with

4Reduced Boiler Weight Purewell VariHeat boilers have been reduced in weight significantly, in comparison to traditional atmospheric cast iron boiler

5Boiler Thermostats Purewell VariHeat boilers are fitted with a manual reset limit thermostat, which has a range of 90-110°C on all models. This wi

6Technical Data he Models Purewell VariHeat High Efficiency Non Condensing Boilers Performance and General Data Information - Natural GasBoiler Model

7Technical Data c Models Purewell VariHeat Condensing Boilers Performance and General Data Information - Natural GasBoiler Model PV70c PV95c PV110c PV

8Dimensional Details he Models Purewell VariHeat High Efficiency Non Condensing Boilers* Electrical trunking may be run in front of the boiler at

9Dimensional Details c Models Purewell VariHeat Condensing Boilers Dimensions in mm PV70c, PV95c & PV110c PV140c & PV180cFlow connection