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TECHNICAL INFORMATION / INSTALLATION INSTRUCTIONS
RATIOfresh Freshwater Station 250/400
Hygienic Water Heating
A continuous flow process is used to heat potable water
quickly and on demand to a preset temperature.
Excellent Performance
The RATIOfresh 250 unit delivers hot water at up to 25 l/
min. The larger station RATIOfresh 400 even reaches a tap-
ping capacity of 40 l/min and thus is suitable for multi-fam-
ily homes with up to 20 individual apartments.
Functional Design
A modern powder-coated metal casing houses all compo-
nents in a compact design.
Adaptive Microprocessor Controlling
The microprocessor "learns" the water withdrawal patterns
of users. This means the freely selectable hot water temper-
ature can be maintained precisely even with fluctuating
flow or inlet temperatures within the primary circuit. This
also offers various options of regulating hot water
circulation.
Easy Assembly and Maintenance
The station is suitable for mounting on the wall or the stor-
age tank (in conjunction with all RATIO buffer cylinders and
the additionally available tank expansion kit). Flat sealing
connections simplify assembly and installation as well as all
service tasks. After the hydraulic integration, the ready-to-
plug-in station can be operated immediately as delivered.
Numerous Application Options
The freshwater station can be combined with almost any
heat source. Oil, gas, wood logs and pellet boilers are as
suitable as a solar installation or local or district heating dis-
tribution systems. All it takes is a buffer cylinder whose ther-
mal stratification is supported by minimal return tempera-
tures within the primary circuit.
Protection from Legionella Pneumophila Bacteria
If required, the hot water and the circulation piping net-
work can be thermally disinfected. Time, temperature, and
duration of the disinfection process are individually
adjustable.
Content
1.
Technical Information . . . . . . . . . . . . . . . . . 2
1.1 Technical Data . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Scope of Delivery . . . . . . . . . . . . . . . . . . . . 3
1.3 Accessories . . . . . . . . . . . . . . . . . . . . . . . 3
2.
Safety Information . . . . . . . . . . . . . . . . . . . 6
2.1 Operator Qualifications . . . . . . . . . . . . . . . . 6
2.2 Intended Use . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Standards and Guidelines . . . . . . . . . . . . . . . 7
2.4 Installation Recommendations . . . . . . . . . . . . 7
Solar Thermal / Solar Cylinder
EN-RATIOfresh-250-400_TI-MA-0809-11214900
Figure 1 RATIOfresh Freshwater Station 250/400.
3.
Installation . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Prior to the Installation . . . . . . . . . . . . . . . . . 8
3.2 Wall Mounting . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Storage Tank Mounting . . . . . . . . . . . . . . . . 8
3.4 Connecting Potable Water . . . . . . . . . . . . . . . 9
3.5 Connecting Circulation . . . . . . . . . . . . . . . . . 9
3.6 Installing the Primary Circuit . . . . . . . . . . . . . 10
3.7 Switching the Primary Return Flow . . . . . . . . . . 11
3.8 Connecting the Controller . . . . . . . . . . . . . . 11
3.9 Closing the Housing . . . . . . . . . . . . . . . . . . 11
4.
Controller Operation . . . . . . . . . . . . . . . . . 13
4.1 Controller Displays . . . . . . . . . . . . . . . . . . 13
4.2 Controller Settings. . . . . . . . . . . . . . . . . . . 13
4.3 Controller Setting Tables . . . . . . . . . . . . . . . 14
5.
Initial Startup. . . . . . . . . . . . . . . . . . . . . . 19
6.
Notes for Operators . . . . . . . . . . . . . . . . . . 20
7.
Maintenance and Care . . . . . . . . . . . . . . . . 22
8.
Troubleshooting. . . . . . . . . . . . . . . . . . . . 23
9.
System Solutions - Example . . . . . . . . . . . . . 27
Wagner& Co
1
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Table of Contents
Summary of Contents for Wagner & Co RATIOfresh 250
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Page 1: Table Of Contents
Excellent Performance The RATIOfresh 250 unit delivers hot water at up to 25 l/ min. The larger station RATIOfresh 400 even reaches a tap- ping capacity of 40 l/min and thus is suitable for multi-fam- ily homes with up to 20 individual apartments. -
Page 2: Technical Information
1. Technical Information 1.1 Technical Data Table 1 Technical Data Feature RATIOfresh 250 Variation Copper soldered heat exchanger Stainless steel soldered heat exchanger Order no. 150 300 65 150 301 77 Nominal tapping capacity 25 l/min 10 °C → 45 °C (sec.) 61 kW 10 °C →... -
Page 3: Scope Of Delivery
Table 2 Technical Data Feature RATIOfresh 250 Variation Copper soldered heat exchanger Stainless steel soldered heat exchanger Order no. 150 300 66 150 301 78 Nominal tapping capacity 40 l/min 10 °C → 45 °C (sec.) 98 kW 10 °C → 60 °C (sec.) -
Page 4: Ratiofresh Freshwater Station
Side view Drill pattern Frontal view 4 Primary flow 7 Hot water Heat ex changer 6 Cold water 9 Single-jet meter 8 Circulation 3 Circulation pump ø 55 1 Controller 10 Housing 5 Primary return Top/bottom view ø 55 Figure 2 RATIOfresh freshwater station viewed sectionally, with dimensions and drilling template. EN-RATIOfresh-250-400_TI-MA-0809-11214900... - Page 5 Top section of housing Housing cover & C Figure 3 Cross-section of RATIOfresh freshwater station with dimensions and drill hole pattern (page 4) 1 Adaptive microprocessor control to regulate hot water and circulation, display 2 x 16 characters, plastic foil keypad with 3 keys and 4 LED, 2 power outputs, 3 temperature sensors and 2 immersion sleeves made from chrome-plated brass;...
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Page 6: Safety Information
station is designed in such a way that the lowest possible re- 2. Safety Information turn temperatures are reached, which exhibit only a minor The following safety information is intended to protect you difference to the cold water temperature. from hazards and dangers that may suddenly occur when the device is handled incorrectly, either deliberately or un- Thermal Disinfection knowingly. -
Page 7: Standards And Guidelines
Standby Temperature Control Connecting the Circulation The RATIOfresh freshwater station is also equipped with a The freshwater station RATIOfresh is designed to be con- standby temperature control in addition to the circulation nected to a circulation line. The circulation pump must be a function. -
Page 8: Installation
3. Installation 3.1 Prior to the Installation ● Before assembly, please compare the delivered compo- nents with the parts list in table 3. ● You need the following tools: drill, stone drill (12 mm), voltage meter, screwdriver, folding meter-rule, wrench size 10, monkey wrench, ratchet with size 13 socket. -
Page 9: Connecting Potable Water
3.5 Connecting Circulation 3.4 Connecting Potable Water (fig. 6) (Optional, fig. 6) Cold and hot water connections must be connected to the freshwater station in accordance with the rules and regula- DVGW 551 specifies a circulation element or system in tions issued by the local water utility or water provider. -
Page 10: Installing The Primary Circuit
3.6 Installing the Primary Circuit (fig. 7) ● In order for the RATIOfresh freshwater station to yield the Connect the primary return line (8) and route to the cor- desired output, it must be supplied with a sufficient volume responding storage tank connection that matches the of hot water either from a buffer storage tank or a district temperature level. -
Page 11: Switching The Primary Return Flow
3.7 Switching the Primary Return Flow and opens contact 11-13. Once the boiler is no longer needed, contact 11-12 is opened again and contact 11- (fig. 15) 13 is closed again. If contact 11-12 is closed, the third When the RATIOfresh freshwater unit is used in systems LED from the left (cf. - Page 12 Low voltage area 230 V at rest Optional circulation pump Grounding (yellow/green) activated Zero (blue) Phase (black or brown) Primary pump cable Hot-/cold water sensors Grounding (yellow/green) Hot water sensor (blue) Zero (blue) Mass (brown) Phase (black or brown) Circulation / cold water sensor (blue) Primary circuit sensors Buffer cyl.
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Page 13: Controller Operation
4. Controller Operation 4.1 Controller Displays (fig. 10) The controller of the RATIOfresh freshwater station features a permanently backlit LCD display (5) with 2 lines, LCD- Dis- play (5), 4 LEDs depicting information about the operating status of the station (1) to (4) and 3 control buttons (6), (7), and (8). -
Page 14: Controller Setting Tables
4.3 Controller Setting Tables Table 5 Info Level (use the < and > keys to select the desired display, use the key to switch to the menu level) Menu Description Range Temperature at hot water connection of station. While water is being TEMP. - Page 15 Table 7 Value Level – HOT WATER SETTINGS (use the < and > keys to select the desired menu item, use the key to switch to the setting level, use < and > to change values, save with the key) Designation Description Range...
- Page 16 Table 8 Value Level – SETTINGS: CIRCULATION Designation Description Range Base value Your value The time slots 1 to 4 are depicted in the menu only if the circulation mode “time” has been selected. TIMESLOT Sub-menu for setting the circulation times on weekdays (Monday WEEKDAY to Friday) slots 1-4...
- Page 17 Table 10 Value Level – SETTINGS: TIME Designation Description Range Base value Your value WEEKDAY Make sure the day of the week and the time are set correctly especially Monday to when using the circulation and disinfection function. Sunday [Monday] TIME Make sure the day of the week and the time are set correctly especially 00:00 –...
- Page 18 Table 12 Value Level – SETTINGS: MANUAL OPERATION Designation Description Range Base value Your value P1 – HOT WATER Software can be used to set the operating mode of the primary circuit AUTO pump and is used for the manual operation of the pump. [AUTO] AUTO P2 –...
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Page 19: Initial Startup
5. Initial Startup 5.1 Checking Installation Check especially the following three points: ● The correct connection of the pipes based on the con- nection diagrams in fig. 6 and fig. 7 as well as the de- scribed assembly steps. ● The correct placement of the temperature sensor T buffer within the aux. -
Page 20: Notes For Operators
● Hot water with the temperature indicated in column 3 3. After approx. 30 seconds, the controller starts to adjust must be available at minimum in the auxiliary heating the hot water temperature to the desired temperature. section of the buffer cylinder in order to reach the de- Select the menu item “Hot Water Temp.”... - Page 21 °C in l/min For RATIOfresh 250 at nominal hot water temperature of 45 °C 13.0 21.9 12.8 23.4 17.3 For RATIOfresh 250 at nominal hot water temperature of 60 °C 14.5...
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Page 22: Maintenance And Care
7. Maintenance and Care The system should be checked annually: ● Check all screw connections and soldered points for leaks. ● In case of potable water with an increased carbonate content, the heat exchanger should be checked regu- larly for lime buildup. The following changes are indica- tive of lime buildup: Return temperatures of the primary circuit are significantly above those listed in Table 14. -
Page 23: Troubleshooting
8. Troubleshooting Table 15 Malfunction Cause Remedy Shut-off valve in cold water supply Check all shut-off valves and spigots and open completely. partially closed. Hot water flow volume is Clogged cold water supply filter. Shut off the cold water supply, remove filter, clean filter. insufficient. - Page 24 Table 15 Malfunction Cause Remedy Circulation pump defective. Check the function of the circulation pump (manual operation). Shutoff elements closed. Check all shutoff valves and cocks and open completely. Circulation system heating Air in circulation system. Bleed the circulation system. is insufficient.
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Page 27: System Solutions - Example
9. System Solutions – Example : Solar circuit pump Collector field : Cylinder charge pump Solar controller : Heating circuit pump : Buffer discharge pump to heat potable water : Circulation pump : Mixing valve to maintain specific min. return temperature HKM : Heating circuit mixing valve Heating circuit T-storage... - Page 28 : Solar circulation pump : Buffer discharge pump to heat potable water Collector field Solar controller : Cylinder charge pump : Heating circuit pump : Hot water circulation pump : 3-way switching valve (temperature increase heating return) : 3-way switching valve (return switching circulation mode) Heating circuit T-storage...