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EN-RATIOfresh-250-400_TI-MA-0809-11214900

3.4 Connecting Potable Water (fig. 6)

Cold and hot water connections must be connected to the
freshwater station in accordance with the rules and regula-
tions issued by the local water utility or water provider. We
recommend connecting to the potable water network in
the manner illustrated in fig. 6.

●

A safety subassembly

(3)

with safety, shut-off, and check

valve must be installed in the cold water supply

(2)

acc. with DIN 1988. Make sure there is no shut-off be-
tween the RATIOfresh station

(1)

and the safety sub-

assembly

(3)

. To connect the piping to the cold water

supply

(7)

of the station, please use the connection sets

with 1" swivel nuts

(4)

, soldered connection 22 mm

(5)

and flat seal

(6)

or threaded connection sets as an alter-

native, both available as additional accessories.

●

The hot water outlet of the station

(8)

must be connected

to the hot water network with soldered or threaded con-
nection sets and well insulated as well. Do not forget flat
seals

(6)

●

Potable water with a high content of lime may require
that the heat exchanger is flushed regularly. This re-
quires installing irrigation cocks

(9)

and

(10)

into the

cold and hot water lines in close proximity to the station!
After irrigation cock

(10)

in the hot water line, an addi-

tional shut-off cock

(11)

is needed for flushing the pipes.

3.5 Connecting Circulation
(Optional, fig. 6)

DVGW 551 specifies a circulation element or system in
larger hot water networks. The circulation return

(21)

must

be installed directly before tapping point

(22)

. The circula-

tion pump

(23)

is supplied with voltage and controlled by

the controller. Chapter 3.7 provides information about the
correct connection of the power cable

(24)

. Please note

that a backflow preventer (integrated in the figure of the cir-
culation pump) must be installed in the circulation line.

●

Remove the 1/2" plug

(26)

at the circulation return con-

nection of the station

(25)

and attach the circulation re-

turn line as per connection diagram. Use a 1/2" threaded
connection

(27)

1/2 AG

Figure 6 Potable water connection

Bottom section of housing;

Cold water supply;

Safety subassembly;

1" swivel nut;

22-mm soldered connection;

Flat seal;

Cold water supply;

Hot water outlet;

Irrigation cock;

Shutoff valve;

Circulation return;

Tapping point;

Circulation pump;

Connection cable to circulation pump;

Circulation return connection;

½" plug;

½" threaded sleeve.

Содержание RATIOfresh 250

Страница 1: ...ely asdelivered 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 Legionel...

Страница 2: ... C 5 25 K Pressure loss Dp secondary 370 mbar with 25 l min Voltage supply 230 V 50 Hz Fuses Operating voltage 230 V control fuse 100 mAT 250 V power fuse 2 AT 250 V To replace internal fuses de energize the device remove the screws on the controller and lift off cover fig 8 9 10 Dimensions of housing H x W x D 940 x 350 x 181 mm Color powder coated Upper section RAL 7035 light gray Bottom section...

Страница 3: ...ping capacity 10 C 45 C sec 10 C 60 C sec 40 l min 98 kW 139 kW Coefficient of performance NL 10 C 45 C sec 82 C prim acc to DIN 4708 T3 10 C 60 C sec 85 C prim 10 C 60 C sec 75 C prim NL 19 5 NL 17 NL 11 Nominal hot water temperature 25 70 C Circulation return 5 70 C 5 25 K Pressure loss Dp secondary 490 mbar with 40 l min Voltage supply 230 V 50 Hz Fuses Operating voltage 230 V control fuse 100 ...

Страница 4: ...n 1 Controller 2 Heat ex changer 85 57 80 ø 55 ø 55 181 350 80 7 Hot water 6 Cold water 9 Single jet meter 3 Circulation pump 10 Housing 8 Circulation Frontal view Top bottom view Drill pattern 64 32 254 521 827 70 Figure 2 RATIOfresh freshwater station viewed sectionally with dimensions and drilling template ...

Страница 5: ...f valve 5 Primary return connection T 1 OT flat sealing made from brass with pump shut off slider incl backflow preventer 6 Cold water supply connection T1 OT flat sealing made from brass 7 Hot water outlet connection T 1 OT flat sealing made from brass 8 Circulation return connection option T IT closed with plug 9 Single jet meter brass chrome plated connections OT flat sealing QN 2 5 m h 10 Bott...

Страница 6: ... protection function can be used to disinfect the entire hot water and circulation piping network thermally and during freely selectable times day or week program You choose between once per week Mon Sun or daily This function serves to pre vent the formation of bacteria and viruses in the potable water network The station uses an external relay output to activate the buffer storage auxiliary or b...

Страница 7: ...t be checked regularly in accordance with DIN 4753 Theexhaust vent maynever be closed or restricted A corresponding water filter meeting current technology standards isto be installed intothecold water supplyline Connecting the Circulation The freshwater station RATIOfresh is designed to be con nected to a circulation line The circulation pump must be a commercially available stepped wet pump E pu...

Страница 8: ...nsert in cluded plugs 2 Insert screws 3 to a distance of 1 cm and insert housing 4 into keyholes 5 and attach screws Tighten screws 3 firmly 3 3 Storage Tank Mounting fig 5 The RATIOfresh freshwater station is suitable for mounting directly on all buffer cylinders RATIO H series using the additionally available tank expansion kit cf accessories table 4 Remove the insulation of the RATIO H 1 cylind...

Страница 9: ... 10 into the cold and hot water lines in close proximity to the station After irrigation cock 10 in the hot water line an addi tionalshut off cock 11 isneeded forflushingthepipes 3 5 Connecting Circulation Optional fig 6 DVGW 551 specifies a circulation element or system in larger hot water networks The circulation return 21 must be installed directly before tapping point 22 The circula tion pump ...

Страница 10: ...maryflow are installed in an upward direction Connect the primary return line 8 and route to the cor responding storage tank connection that matches the temperature level Table 14 lists the return temperatures of the station in dependency of the operating condi tions Route cable of the temperature sensor 9 marked Tprim from the freshwater station along the primaryflow and attach sensor in the aux ...

Страница 11: ...same way and plug into socket 7 required cable cross section 3 x 0 75 to 1 5 A fourth temperature sensor type KTY cf accessories can be connected via plug 8 and socket 9 A RS 232 interface cable available as an accessory can be connected to plug 12 socket 13 It is also possi ble to log all measured values the current controller sta tus and the current pump output This requires connect ing the 9 pi...

Страница 12: ... P1 PE L N P2 PE L N Low voltage area 230 V 5V 15V R T 10 9 11 3 13 9 19 15 5 21 7 16 17 14 18 8 10 12 6 20 4 at rest 11 12 13 activated 11 12 13 Hot cold water sensors Hot water sensor blue Mass brown Circulation cold water sensor blue Primary circuit sensors Buffer cyl sensor blue Mass brown Primary flow sensor blue Optional data cable Plus 5V yellow TxData white RxData green Mass brown Optional...

Страница 13: ... temperature level Use keys 6 and 8 to browse within the info level anddepict allcurrent temperatures andpumpoutputs 4 2 Controller Settings fig 10 Use key 7 to switch from the info level to the menu level Use keys and to select the desired setting menu Press key to switch to the value level where the set nominal values are listed in square brackets Select the desired menu item with the and keys a...

Страница 14: ...nday Sunday 00 00 to 24 00 Table 6 Menu Level use the and keys to select the desired menu and confirm with the key Menu Description SETTINGS HOT WATER Settings for the primary circuit pump nominal hot water temperature and standby temperature details in Table 7 SETTINGS CIRCULATION Settings for the circuit pump operating mode determining the time frame for the circulation operating circulation ret...

Страница 15: ...ange here 0 l min to 20 l min is divided by the control into 10 time slots and an internal control value is adjusted for each time window during the adaptation process Selecting an unfavorable max tap volume value can thus adversely affect the control performance The actual max output of the station is not reduced by this setting 20 to 80 l min 20 l min END Use the and keys to select and then conf...

Страница 16: ...sk of scalding during the disinfection cycle MODE Nominal OFF Select operating mode for the disinfection of the hot water system When in automatic mode AUTO the hot water and circulation network are thermally disinfected at the selected time Select a time outside of the typical tapping times to reduce the risk of scalding With the operating mode ON the disinfection is activated continuously e g fo...

Страница 17: ... of pump in relation to drawn water volume 1 50 K 5 K RATIOfresh type 250 400 Controlling variation this selection resets all values to factory setting 250 400 800 250 400 ADAPTATION VALUES Start values for calculation of pump power For all 10 tapping slots start values are set They are the base of calculating the required pump force The actual temperatures and tapping volumes are incorporated in ...

Страница 18: ...used for the manual operation of the pump OFF ON AUTO AUTO BOILER REQUEST AUTO Software can be used to set the operating mode of the potential free relay and is used for manual operation OFF ON AUTO AUTO END Select this menu item with the and keys and press the key to return to the menu level Table 13 Value Level SETTINGS LANGUAGE Designation Description Range Base value Your value LANGUAGE Englis...

Страница 19: ...for the specific on site condi tions fig 10 provides an overview over the menu structure and explains the use of the control keys Enter the corre sponding values into the setting menus in the following order HOT WATER CIRCULATION DISINFECTION SERVICE LANGUAGE and TIME Tables 7 to 13 pro vide assistance with selecting the respective values To finish enter the individual configuration into the Your ...

Страница 20: ...t tapping volumes a controlled tapping should be per formed when initially starting up the system Please follow these steps and adhere to the described sequence of these steps 1 First select the menu item Tapping Area in the info level of the controller 2 Open a hot water tap until the display depicts 02 3 After approx 30 seconds the controller starts to adjust the hot water temperature to the des...

Страница 21: ...ature in primary circuit 6 Pressure loss in primary circuit 7 Output level of the primary circuit pump For RATIOfresh 250 at nominal hot water temperature of 45 C 10 65 50 13 0 23 98 min 60 8 1 16 65 min 15 140 50 21 9 26 241 med 60 12 8 18 96 min 25 370 60 23 4 22 199 med 70 17 3 18 157 min For RATIOfresh 250 at nominal hot water temperature of 60 C 10 65 65 14 5 30 117 min 75 9 4 21 27 min 15 14...

Страница 22: ...o 5 in the primary circuit flow and pump slider fig 11 no 7 to block primary cir cuit fig 11 no 2 9 Empty heat exchanger fig 11 no 3 on the primaryside by loosening the 1 bolt fig 11 no 6 at the primary flow connection and fig 11 no 10 at the primary re turn To remove the heat exchanger remove all four 1 swivel nuts fig 11 no 4 6 10 11 using a size 36 wrench Place heat exchanger over night into a ...

Страница 23: ...ue with the recommendations in table 14 and correct as needed Incorrectly set power output level of the primary circuit pump Compare the set value with the recommendations in table 14 and correct as needed Controller not yet adapted Carry out a controlled tapping see chapter 5 6 Air within the primary circuit prevents sufficient flow through the heat exchanger Bleed the primary circuit see chapter...

Страница 24: ... circulation system Only without circulation system Very low tapping volume with very high primary circuit temperature falls below the controller limit range Reduce the primary circuit temperature It takes a long time until hot water emerges from the tapping point Incorrectly set circulation Check the circulation settings Circulation and standby function deactivated due to a primary circuit temper...

Страница 25: ...EN RATIOfresh 250 400_TI MA 0809 11214900 25 ...

Страница 26: ...26 EN RATIOfresh 250 400_TI MA 0809 11214900 ...

Страница 27: ...runs the speed controlled hot water circulation pump If temperatures in the primary buffer cylinder are sufficient solar heat is used for heating by raising the heat ing return temperature 9 System Solutions Example RATIO H PG RATIOfresh T P2 T T Vm T T SUNGO P4 P5 HKM P1 P1 CIRCO P3 Solar controller T storage Heating circuit Collector field P1 Solar circuit pump P2 Cylinder charge pump P3 Heating...

Страница 28: ...ge is utilized for space heating The solar controller additionally controls loading of the buffer via the fireplace inset Tvl SUNGO Vu Ta Ttw P1 P1 CIRCO P4 P3 Vr B A AB P2 P5 RATIOfresh RATIO H PG Heating circuit Solar controller T storage Collector field Oil or gas heating boiler Cold water Hot water P1 Solar circulation pump P2 Buffer discharge pump to heat potable water P3 Cylinder charge pump...

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