Danfoss EvoFlat 4.0 F: Domestic Hot Water and Direct Heating Module
Product Overview
The Danfoss EvoFlat 4.0 F is a thermal supply module specifically designed for multi-family buildings requiring central heat production or district heating. It sets new standards with its innovative design, featuring functional blocks made from specially reinforced PPS composite material. This construction makes the module exceptionally lightweight, limits internal heat emission, and its smooth surface reduces the risk of scaling and obstruction.
Components are assembled using new push-fit connectors, eliminating the need for re-tightening during installation and commissioning, unlike conventional screw-type connections.
Key Features and Benefits
- Lightweight design
- Easy installation, maintenance, and operation
- Durable composite material
- Minimal footprint
- Reduced heat loss due to EPP insulation cover
- Integrated heat meter connection
- Integrated water meter connection
- Compatible with various heat sources such as district heating, heat pumps, and biomass.
Primary Side
The supply module is equipped with two differential pressure regulators and a central filter. A summer bypass provides constant heat to the supply line during shutdown periods, ensuring a rapid response time for domestic hot water (DHW) in summer. The bypass is regulated by a thermostat.
Heating (CHF)
The module supplies radiator heating circuits with the required flow temperature. An integrated differential pressure regulator ensures optimal heating conditions. A zone valve is included on the return line. Temperature regulation can be achieved using an optional actuator and a programmable room thermostat.
Domestic Hot Water (DHW)
Four heat exchanger sizes are available, covering needs from 37 kW to 70 kW. The EvoFlat 4.0 F features an intelligent regulator that adjusts the primary flow based on DHW temperature and the volume of water drawn. An integrated differential pressure regulator on the primary DHW circuit eliminates the need for hydraulic balancing of the module. A DHW recirculation kit can be added as an option.
Technical Specifications
General Data
| Parameter | Value |
|---|---|
| DHW Regulator | TPC-M |
| Nominal Pressure | PN10 |
| Max. Primary Inlet Temperature | 95 °C |
| Static Cold Water (EF) | Pmin = 1.5 bar |
| Heat Exchanger Brazing | Copper or Stainless Steel |
| Weight (without cover) | 7.7 - 9.3 kg |
| Insulation | EPP, λ 0.039 |
| Electrical Supply | 230V AC |
| Connection Dimensions | G 3/4" female thread |
| Nominal Primary Pressure | 10 bar |
| Nominal Secondary Pressure | 10 bar |
| Weight (without accessories) - Type 1 Exchanger | 9.7 kg |
| Weight (without accessories) - Type 2 Exchanger | 10.1 kg |
| Weight (without accessories) - Type 3 Exchanger | 10.6 kg |
| Weight (without accessories) - Type 4 Exchanger | 11.4 kg |
DHW Capacity Examples
| Heat Exchanger Type | Capacity [kW] | Primary Temperature Regime [°C] | Primary Flow Rate [l/h] | Primary Pressure Drop [kPa]* | Tap Flow Rate @ 50°C [l/min] |
|---|---|---|---|---|---|
| Type 1 | 37 | 65/15 | 637 | 25 | 13.3 |
| 43 | 65/16 | 750 | 32 | 15.4 | |
| Type 2 | 45 | 65/15 | 770 | 29 | 16.2 |
| 49 | 65/15 | 844 | 35 | 17.6 | |
| Type 3 | 55 | 65/15 | 943 | 40 | 19.8 |
| 38 | 55/19 | 901 | 37 | 13.7 | |
| Type 4 | 60 | 65/14 | 1014 | 41 | 21.6 |
| 70 | 65/14 | 1197 | 57 | 25.2 | |
| 49 | 55/19 | 1158 | 52 | 17.6 |
*Energy meter not included.
Heating Capacity Examples
| Heating Capacity [kW] | Heating Circuit ΔT [°C] | Primary Pressure Drop [kPa]* | Heating Flow Rate [l/h] |
|---|---|---|---|
| 10 | 20 | 12 | 430 |
| 10 | 25 | 8 | 344 |
| 10 | 30 | 6 | 287 |
| 10 | 35 | 5 | 246 |
| 10 | 40 | 4 | 215 |
| 17.5 | 30 | 20 | 500** |
*Energy meter and DHW primary not included.
**Max flow rate.
Ordering Information
Standard Module Supply Units
| Module | Copper Brazed Heat Exchanger | Stainless Steel Brazed Heat Exchanger |
|---|---|---|
| EvoFlat 4.0 F (Exchanger size 1) | 183B1008 | 183B1508 |
| EvoFlat 4.0 F (Exchanger size 2) | 183B1009 | 183B1509 |
| EvoFlat 4.0 F (Exchanger size 3) | 183B1010 | 183B1510 |
| EvoFlat 4.0 F (Exchanger size 4) | 183B1011 | 183B1511 |
DHW Recirculation
A DHW recirculation kit with a pump and safety valve (10 bar) can be ordered for easy connection to the supply module. This increases the required cabinet width to at least 690 mm.
| Reference | Description |
|---|---|
| 183B0500 | DHW Recirculation Kit EvoFlat 4.0 |
| 183B0547 | DHW Recirculation Kit EvoFlat 4.0 with insulated cover for DHW pump |
Accessories - Recessed Cabinets
| Reference | Description | Width [mm] | Height [mm] | Depth [mm] |
|---|---|---|---|---|
| 183U6028 | Recessed cabinet with mounting rail and loose ball valves | 610 | 910 | 150 |
| 183U6029 | Recessed cabinet with mounting rail and loose ball valves | 690 | 910 | 150 |
| 183U6033* | Foot set for recessed cabinet | |||
| 183L5142* | Ball valve set 3/4" (7 connections) |
*Spare parts
Accessories - Surface-Mounted Cabinets
| Reference | Description | Width [mm] | Height [mm] | Depth [mm] |
|---|---|---|---|---|
| 183U6012 | Surface-mounted | 610 | 910 | 150 |
| 183U6014 | Surface-mounted | 690 | 910 | 150 |
Distribution units fit the rear panel of recessed cabinets but can also be wall-mounted. Recessed cabinets for recessed variants are available in two sizes: Standard supply module: L 610/H 910/P 150 mm. Supply module with DHW recirculation: L 690/H 910/P 150 mm.
Hydraulic Diagram and Connections
The hydraulic diagram illustrates the flow paths for domestic hot water (DHW), primary supply/return, and heating circuits. Key components include heat exchangers, regulators, filters, valves, and pumps.
Connections:
- 1: Cold water inlet (EF)
- 2: Hot water outlet (DHW)
- 3: Cold water outlet (EF)
- 4: Primary supply (AP)
- 5: Primary return (RP)
- 6: Heating supply (CHF)
- 7: Heating return (CHF)
Numbered components in the diagram include DHW heat exchanger (2), differential pressure regulator (4), filter (5), ball valve (7), DHW circulation pump (9), safety valve (12), air vent (17), sensor pocket (23), energy meter connection (24), DHW recirculation connection (33), domestic water regulator (38), summer bypass (40), zone valve (52), and zone valve actuator (52A).
Performance Curves
The document includes performance curves for different heat exchanger types (Type 1, 2, 3, and 4 HEX). These graphs illustrate relationships between various parameters such as:
- Primary pressure drop vs. primary flow rate (circuit primary)
- Secondary pressure drop vs. tap flow rate (circuit secondary)
- Primary flow rate vs. DHW tap flow rate at different primary temperatures
- Return primary temperature vs. DHW tap flow rate at different primary temperatures
These curves are essential for system design and performance analysis.
Spare Parts
A comprehensive list of spare parts is provided, including replacement heat exchangers, regulators, valves, and various connection components.
| Position | Reference | Description |
|---|---|---|
| 1100 | 183B0503 | Replacement kit for heat exchanger, type 1, copper |
| 1100 | 183B0504 | Replacement kit for heat exchanger, type 2, copper |
| 1100 | 183B0505 | Replacement kit for heat exchanger, type 3, copper |
| 1100 | 183B0506 | Replacement kit for heat exchanger, type 4, copper |
| 1100 | 183B0507 | Replacement kit for heat exchanger, type 1, stainless steel |
| 1100 | 183B0508 | Replacement kit for heat exchanger, type 2, stainless steel |
| 1100 | 183B0509 | Replacement kit for heat exchanger, type 3, stainless steel |
| 1100 | 183B0510 | Replacement kit for heat exchanger, type 4, stainless steel |
| 2000 | 183B0563 | Dp Regulator DHW EvoFlat 4.0 Thermostatic |
| 2010 | 183B0564 | Dp Regulator Heating EvoFlat 4.0 Thermostatic |
| 2030 | 183B0511 | DHW Control Valve EvoFlat 4.0 Thermostatic |
| 2040 | 183B0512 | Thermostatic Actuator for DHW Control EvoFlat 4.0 Thermostatic |
| 2050 | 183B0513 | Danfoss EvoFlat 4.0 Vent Purge Kit |
| 2060 | 183B0514 | Flow meter with screws and seals |
| 2070 | 183B0515 | Filter screen with seal EvoFlat 4.0 |
| 2080 | 183B0516 | Manual Bypass Valve EvoFlat 4.0 Thermostatic |
| 2090 | 183B0517 | Thermostatic Bypass Valve EvoFlat 4.0 Thermostatic |
| 2130 | 183B0521 | EPP Cover Kit Danfoss EvoFlat 4.0 |
| 2170 | 183B5029 | Zone Valve Kit EvoFlat 4.0 Thermostatic |
| 3000 | 183B0552 | Clips for EvoFlat 4.0 |
| 3010 | 183B0553 | Plastic screw 15x25 |
| 3020 | 183B0554 | Block for summer bypass EvoFlat 4.0 |
| 3030 | 183B0555 | Pipe Ø18 - 171 mm |
| 3040 | 183B0556 | Pipe Ø18 - 223 mm |
| 3050 | 183B0557 | Socket with nuts 3/4" x 3/4" x 32 mm |
| 3060 | 183B0558 | Manifold 3/4" x 110 mm - DHW |
| 3070 | 183B0559 | Pipe Ø18 - 77 mm |
| 3110 | 183B0565 | Manifold 3/4" x 110 mm - CHF |
| 3120 | 183B0566 | Mounting rail with symbols for EvoFlat 4.0 |
| 3130 | 183B0560 | Clips, O-rings, and washers for EvoFlat 4.0 |
| 4000 | 082F1601 | Actuator, TWA-Q-NO |
| 183B0533 | Rinsing Tool EvoFlat 4.0 HEX |
Water Quality Guidelines
Danfoss provides guidelines for water quality in domestic hot water and district heating systems to ensure optimal performance and longevity of heat exchangers. These guidelines are crucial for preventing corrosion.
| Parameter | Unit | Value or Concentration | Plate Material AISI 316L W. Nr. 1.4404 | Brazing Material Cu | Brazing Material CoResist | Brazing Material StS |
|---|---|---|---|---|---|---|
| pH | < 0.6 | - | 0 | 0 | - | |
| 6.0-7.5 | + | 0/- | + | + | ||
| 7.5-10.5 | + | + | + | + | ||
| > 10.5 | + | 0 | 0 | + | ||
| Conductivity | µS/cm | < 10 | + | + | + | + |
| 10-500 | + | + | + | + | ||
| 500-1000 | + | 0 | + | + | ||
| > 1000 | + | 0 | + | + | ||
| Free Chlorine | mg/l | < 0.5 | + | + | + | + |
| 0.5-1 | 0 | + | + | + | ||
| 1-5 | 0 | 0 | 0 | - | ||
| > 5 | - | - | - | - | ||
| Ammonia (NH₃, NH₄⁺) | mg/l | < 2 | + | + | + | + |
| 2-20 | + | 0 | 0 | + | ||
| > 20 | + | + | - | + | ||
| Alkalinity (HCO₃⁻) | mg/l | < 60 | + | + | + | + |
| 60-300 | + | + | + | + | ||
| > 300 | + | 0 | + | + | ||
| Sulfate (SO₄²⁻) | mg/l | < 100 | + | + | + | + |
| 100-300 | + | 0/- | 0 | + | ||
| > 300 | + | + | - | + | ||
| HCO₃⁻/SO₄²⁻ Ratio | mg/l | < 1.5 | + | + | + | + |
| > 1.5 | + | 0/- | 0 | + | ||
| Nitrate (NO₃) | mg/l | < 100 | + | + | + | + |
| > 100 | + | 0 | + | + | ||
| Manganese (Mn) | mg/l | < 0.1 | + | + | + | + |
| > 0.1 | + | 0 | 0 | + | ||
| Iron (Fe) | mg/l | < 0.2 | + | + | + | + |
| > 0.2 | + | + | - | + | ||
| *Hardness Ratio [Ca²⁺, Mg²⁺]/[HCO₃⁻] | 0-0.3 | + | + | + | + | |
| 0.3-0.5 | + | 0/- | + | + | ||
| > 0.5 | + | + | + | + |
+ : Good corrosion resistance
0 : Corrosion may occur if several parameters are evaluated with 0
0/- : Risk of corrosion
- : Use not recommended
*Hardness ratio limits based on internal Danfoss experience and testing.
**For evaluation of three or more parameters, consultation with a corrosion and microbiology consultant or the relevant BU HHE representative is necessary.
Chloride Concentration Recommendations
Recommended chloride concentration to avoid stress corrosion cracking (SCC) in stainless steel plates:
| Operating Temperature | Chloride Concentration |
|---|---|
| T ≤ 20°C | max 1000 mg/l |
| T ≤ 50°C | max 400 mg/l |
| T ≤ 80°C | max 200 mg/l |
| T ≥ 100°C | max 100 mg/l |
Certificates and Homologations
- CE
- EU RoHS
- EPD
Other Modules in the Range
Danfoss offers other thermal supply modules in the EvoFlat range:
- EvoFlat 4.0 M: For domestic hot water and underfloor heating.
- EvoFlat 4.0 W: For domestic hot water only.
- EvoFlat 4.0 4 Tubes: For domestic hot water and underfloor heating, specifically designed for heat pumps.
