Viessmann Paromat-Simplex Technical Data
Part No. and prices: see Price List
Product Overview
The Viessmann Paromat-Simplex is a modulating oil/gas boiler designed as a three-pass boiler. It is suitable for operation with modulating boiler water temperature and can also be used with constant boiler water temperature.
Type: PS
Output Range: 80 to 460 kW
Certifications: CE designation in accordance with current EC directives. Certified in accordance with DIN ISO 9001 (Certificate Reg. No. 12 100 5581).
Technical Specifications
The following table details the technical specifications for various models of the Paromat-Simplex boiler:
| Technical Data | Unit | 80 | 105 | 130 | 170 | 225 | 285 | 345 | 405 | 460 |
|---|---|---|---|---|---|---|---|---|---|---|
| Rated output | kW | 80 | 105 | 130 | 170 | 225 | 285 | 345 | 405 | 460 |
| Rated thermal load | kW | 88 | 115 | 143 | 187 | 247 | 313 | 379 | 445 | 505 |
| Flue gas resistance | Pa | 45 | 60 | 65 | 90 | 120 | 200 | 210 | 250 | 270 |
| Boiler shell dimensions (Length) | mm | 1097 | 1297 | 1218 | 1437 | 1468 | 1602 | 1699 | 1899 | 1899 |
| Boiler shell dimensions (Width) | mm | 577 | 577 | 668 | 668 | 749 | 749 | 825 | 825 | 825 |
| Boiler shell dimensions (Height incl. connections) | mm | 1217 | 1217 | 1348 | 1348 | 1411 | 1411 | 1565 | 1565 | 1565 |
| Total weight (Boiler shell with insulation and boiler control unit) | kg | 408 | 464 | 555 | 655 | 816 | - | - | - | - |
| Capacity, boiler water | ltr | 129 | 159 | 222 | 259 | 275 | 308 | 420 | 665 | 630 |
| Max. flow temperature (= safety temperature) | °C | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 |
| Max. working pressure | bar | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Flue gas temperature (gross) at rated output | °C | 195 | 195 | 195 | 195 | 195 | 195 | 195 | 195 | 195 |
| Flue gas mass flow rate at rated output | kg/h | 136 | 179 | 222 | 290 | 383 | 486 | 588 | 690 | 784 |
| Standby loss at rated output and heating water temperature 75/60 °C | % | 0.41 | 0.30 | 0.28 | 0.23 | 0.15 | 0.14 | 0.13 | 0.13 | 0.13 |
| Flue pipe, OD | mm | 180 | 180 | 200 | 200 | 200 | 200 | 250 | 250 | 250 |
| Gas volume | m³ | 0.156 | 0.190 | 0.252 | 0.303 | 0.406 | 0.449 | 0.544 | 0.614 | 0.621 |
*1 Boiler door and flue gas collector removed.
*2 Values for calculating design of chimney according to DIN 4705 (for boilers without the necessary draught), at rated output, based on 13.0% CO2 for light fuel oil, 10.0% CO2 for natural gas and heating water temperatures of 75/60 °C.
*3 Flue gas temperature measured at 20 °C combustion air temperature.
Dimensions and Connections
Diagrams illustrating the dimensions and connection points for the Viessmann Paromat-Simplex boilers are provided. Key connection points include:
- AGA: Flue outlet
- AR: Boiler return
- KTÜ: Boiler flow
- KV: Boiler temperature sensor
- RG1: 1/2" dia. coupling for additional control equipment
- SR: Safety return
- SV: Safety flow (safety valve)
- WB: 2" dia. coupling for water level limiter (from 405 kW)
Detailed dimensions (a, b, c, d, e, f, g, h, k) are provided in tables for different output ranges (80-170 kW and 225-460 kW).
Minimum Clearances
Clearances are specified for boiler installation, including space for maintenance and burner removal. The boiler door can be mounted to swing left or right.
Burner Connection
For boilers up to 130 kW, the burner connection specifications (hole circle, blast tube opening) conform to standard European dimensions (EN 226). For boilers from 170 kW, specific dimensions for hole circle and blast tube opening are provided. Burner connection can be prepared at the factory upon request.
Pressure Drop (Primary Circuit)
Paromat-Simplex boilers are suitable for fully pumped heating systems. A graph illustrates the pressure drop in the primary circuit based on flow rate.
Standard Delivery and Control Options
Standard Delivery: Includes boiler shell with mounted boiler door, bolted clean-out cover, mating flanges, levelling bolts, sight glass closure, gaskets, insulation, and cleaning brush. A boiler control unit is also included.
Control Options:
- For single-boiler system: KR boiler control unit (constant boiler water temperature), Viessmann Trimatik (standard or Comfortrol programming units for modulating boiler water temperature), Dekamatik-E (modulating boiler water temperature).
- For multi-boiler system: Dekamatik-M1 (modulating boiler water temperature for first boiler or single-boiler systems), Dekamatik-M2 (modulating boiler water temperature for second or third boiler in a multi-boiler system).
Accessories for the Boiler (Safety Equipment)
Available safety accessories include:
- Water level limiter: Float switch with testing device and cut-out, suitable for sealed heating systems (from 350 kW).
- Max. pressure limiting assembly: For sealed heating systems (required for boilers from 350 kW or if safety valve blow-off pressure exceeds 3 bar).
- Min. pressure limiting assembly: For sealed heating systems with fuse protection above 100 °C.
Each accessory lists part numbers, specifications, and TÜV part codes.
Operating Conditions
The document outlines operating conditions for both modulating and constant boiler water temperature modes, detailing requirements for heating water flow, boiler return temperature, minimum boiler water temperature, burner operation (two-stage and modulating), and reduced/weekend operation.
Notes on Planning
Raising the Return Temperature: Recommended to ensure minimum return temperature using suitable control facilities. Divicon heating circuit distributors and separate return temperature raising units are available.
Chimney Stack: Flue gases must be discharged safely, protected from cooling to prevent condensate. The stack must be matched to the boiler's low flue gas temperature.
Adding a Flue Gas Heat Exchanger: Condensing flue gas via a stainless steel heat exchanger is recommended to exploit condensing technology benefits. Refer to technical guides for details.
Boiler Location: Avoid rooms with polluted air (halogenated hydrocarbons), high dust, or high humidity. The room must be frost-protected and well-ventilated. Precautions are necessary for rooms with air pollution.
Warranty: Warranty does not cover damage due to dewpoint corrosion from low boiler water and/or return temperatures, or from unsuitable water for filling/replenishing.
Safety Equipment: A type-tested safety valve is mandatory for compliance with design approval conditions.
Standard Efficiency: Achieves 94% efficiency with 75/60 °C heating system temperatures, based on DIN 4702-8 which accounts for all boiler losses.
Heating Circuits: For underfloor heating, use impermeable plastic pipes (DIN 4726) or system separation with heat exchangers. Modulating boilers require connection via a mixing valve for underfloor heating and large water content circuits.
Mounting a Suitable Burner: Burner must match the boiler's rated output and flue gas resistance. Burner head material must withstand operating temperatures up to 500 °C. Oil pressure jet burners must comply with EN 267, and gas pressure jet burners with EN 676 and CE designation.
Adjustment of the Burner: Oil or gas throughput must be set to the boiler's stated output rating.
Low Water Indicator: Viessmann Paromat-Simplex boilers are equipped with safety cut-outs that prevent overheating due to low water, eliminating the need for an additional low water indicator in many cases.
