Dorchester DR-XP stainless steel condensing water heater
Fully automatic, condensing direct fired water heater with stainless steel tank for domestic hot water.
2 models available with continuous outputs (@44°C ∆T) of 710 & 910l/h.
Product information
- Power outputs of 35 & 46kW
- Storage capacity of 184 litres for both models
- Quick setup and installation thanks to the plug and play technology
- Fully room sealed with flexible flue options enable installation almost anywhere in the building
- Easy to use LCD touch screen display for simple operation, control and fault diagnostics
- Lower costs and less maintenance - no anode protection required due to a stainless steel tank
- Reduces energy use and running costs by maximising condensing water heater performance
- Load profiles of XXL and an A energy rating ensure full compliance with the ErP (Energy-related Products Directive)
- Natural gas and LPG water heater options enable installation in off-grid locations
- All components accessible from front for ease of service and maintenance
- Full project assistance available from our dedicated hot water expert to help with hot water sizing and selection of equipment to match the application.
- Extensive back up and support from our team of experienced engineers across the UK.
- Long-term commitment to spare parts
- Available for next day delivery (dependent on stock availability, charges apply, order cut-off 12pm).
Technical data
| Units | DR-XP 35-200 | |
|---|---|---|
| Water | ||
| Continuous output with 44°C ΔT | l/h | 710 |
| 1st hour output with 44°C ΔT | l | 1100 |
| Continuous output with 50°C ΔT | l/h | 620 |
| 1st hour output with 50°C ΔT | l | 870 |
| Continuous output with 55°C ΔT | l/h | 570 |
| 1st hour output with 55°C ΔT | l | 770 |
| Storage capacity | litres | 184 |
| Maximum working pressure | kPa (bar) | 800 (8) |
| ErP load profile | - | XXL |
| Energy | ||
| Water heating energy efficiency | % | 93 |
| ErP efficiency rating | - | A |
| Heating-up time, ΔT = 44°C | min. | 17 |
| Heating-up time, ΔT = 50°C | min. | 18 |
| Heating-up time, ΔT = 55°C | min. | 19 |
| Nat Gas | ||
| Input, gross – maximum | kW | 37.8 |
| Input, net - maximum | kW | 34.9 |
| Output – maximum | kW | 35.9 |
| Gas inlet pressure – nominal | mbar | 20 |
| Gas flow rate – maximum @1013.25 mbar and 15°C | m3/h | 3.7 |
| LPG | ||
| Input, gross – maximum | kW | 37.0 |
| Input, net - maximum | kW | 33.4 |
| Output – maximum | kW | 34.9 |
| Gas inlet pressure – nominal | mbar | 37 |
| Gas flow rate – maximum @1013.25 mbar and 15°C | m3/h | 1.4 |
| Flue | ||
| Mass flow rate flue gases Nominal/minimal @15°C, 9% CO2, N.T.P. (Nat. Gas - G20) | kg/h | 61/42 |
| Flue gas temperature – maximum | °C | 65.0 |
| NOx emission, dry air free, European Class 6. Maximum (at part load) | mg/kWh | 53 |
| Pressure at the flue outlet only (B23) with zero pressure at air inlet | Pa | 176 |
| Electrical | ||
| Power consumption | W | 160 |
| Electrical supply | Vac | 230V 1PH 50Hz |
| Voltage tolerance | % of Vac | (-15+10%) |
| Misc | ||
| Sound level | dB | 63 |
| Weight when empty | kg | 79 |
| Approximate shipping weight | kg | 97 |
| Maximum floor load/ weight filled with water | kg | 261 |
Ideal uses/applications
- New build projects
- Small to medium sized commercial and public buildings including schools, hospitals and hotels.
- Soft water areas including Scotland and the South West
Optional extras
- Unvented water supply kit - essential for any unvented application. Includes an expansion vessel sized for the water heater and local pipework only.
- Room Sealed Flue Systems:
- Concentric flue systems type C13–Horizontal termination
- Concentric flue systems type C33–Vertical termination
- Twin duct flue systems type C53–Vertical flue termination with Horizontal air inlet
- Conventional Open Flue Systems:
- Open flue systems type B23–Vertical termination
Choose from a wide range of service contracts to help maintain optimum performance of your water heater.
Book commissioning at the same time as placing your order for improved warranty terms.