Bosch 7 736 504 585 Manuale utente

Recirculation Pump Kit 7 736 504 585

16 720 819 502 (2023/09)

Fig. 1

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Fig. 2

Fig. 3 Wiring detail

[1] Tankless unit outer cover

[2] External recirculation pump (field supplied)

[3] Line voltage connection to terminal block of accessory

cable

[4] 5 amp fuse

[5] Recirculation pump kit

[6] Accessory cable connects to tankless control board

Black

Red

6720819502-0 . V32

External power supply required to power the

pump.

External power supply and wiring field

supplied.

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Domestic hot water recirculation - Indoor models

Direct recirculation through the tankless water heater is

permissible, however, the heat exchanger warranty is reduced;

see warranty at www.boschheatingandcooling.com.

The following drawings are provided to illustrate two possible

recirculation designs. These schematic is for illustration only

and must not be used for actual Installation without

appropriate engineering and technical advice from a properly

licensed professional in the locality where the installation is

made.

Start up procedure

▶Open a hot and cold water tap to fill the water circuit.

▶Plug-in and turn ON appliance.

▶Open gas supply to appliance.

▶Wait until there is no air in the recirculation loop (a few

minutes).

▶Close the taps.

The recirculation system is now ready to be activated.

Recirculation options

House Recirculation

This recirculation option uses the appliance's NTC sensor along

with the optional schedule to control the pump.

Tank loading

This recirculation option gives the option of using one of three

temperature sensors to control the recirculation option. The

scheduling option is not available for tank loading, except for

commercial models.

•External NTC

– Only compatible with Bosch cable/sensor accessory

(7736504583).

•Aquastat

– The aquastat connector kit (7736504584) must be used

to connect a field supplied aquastat to the appliance.

•Internal NTC

– Uses the appliance's NTC sensor to measure the

incoming water temperature.

For more information on how to program each menu, see the

appliance installation manual.

In order to reduce the heat loss through the

pipes, it’s recommended to insulate all the

pipes in the recirculation circuit.

WARNING: Appliance damage!

▶Ensure that the water loop is full before

activating the recirculation mode.

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Recirculation with a dedicated return line

Fig. 4 Recirculation application with a dedicated return

line

1Cold water supply

2Check valve field supplied

3Circulator pump field supplied

4Expansion tank field supplied

5Circulator cable accessory

6Greentherm 9800 SE / SEC

7PRV

8Shutoff valves field supplied

Recirculation with a cross over valve

Fig. 5 Recirculation application using the cold water line

and a cross over valve

1Cold water supply

2Check valve field supplied

3Expansion tank field supplied

4Circulator pump field supplied

5Circulator cable accessory

6Greentherm 9800 SE / SEC

7PRV

8Shutoff valves field supplied

9Cross over valve field supplied

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Selecting the recirculation settings

This section only applies to the Greentherm 9000 indoor

models.

Fig. 6 SA - Settings

This menu provides access to several parameters.

▶Touch the symbol to enter the menus.

▶Touch the symbol until the display shows SA Settings.

▶Touch the symbol .

▶Use the symbols or to scroll through the

information/adjustments menus, until A1 Recirculation

appears in the display.

▶Touch the symbol to select A1 Recirculation menu.

A1 Recirculation

Choosing a recirculation program:

▶Use the symbols or to scroll through the options.

–HR House Recirculation

–TL Tank Loading

–OFF Off

HR House Recirculation

Creating a Schedule:

▶Touch the symbol , to select Schedule.

▶Touch the symbol , to enter the programming menu.

Display shows week days.

▶Touch the symbol , to select a week day.

▶Use the symbols or to choose option Add New.

▶Touch the symbol , to enter the recirculation program.

▶Use the symbols or to choose the beginning

hour.

▶Touch the symbol , to set the beginning hour.

▶Use the symbols to choose the end hour.

▶Touch the symbol , to set the ending hour.

A recirculation period is defined.

The user can add additional recirculation periods on the

same day.

▶Touch the symbol , to select Add New and repeat all

steps mentioned above.

Copying recirculation program,

The user can copy the recirculation period(s) to other days of

the week.

▶Use the symbols or to select the day of the week

to be copied.

▶Use the symbols or to choose option Copy to.

▶Touch the symbol .

Display shows week days.

▶Touch the symbol to select the day of the week.

▶Use the symbols or to choose another week day.

When week days are selected,

▶Touch the symbol to validate operation.

▶Touch the symbol to exit.

Deleting a recirculation program,

▶Use the symbols or to select the day of the week

to be deleted.

▶Touch the symbol .

▶Use the symbols or to choose option Delete.

▶Touch the symbol .

▶Use the symbols or to choose a recirculation

period.

▶Touch the symbol twice to delete recirculation period.

▶Touch the symbol to exit.

AA Always Active

The recirculation logic will only use the internal NTC to control

the recirculation pump.

▶Touch the symbol to select ON.

Recirculation will be always active.

TL Tank Loading

▶Touch the symbol .

Display shows following menu.

–External NTC

–Internal NTC

–Aquastat

Select the menu according with the installation.

It is recommended to set a schedule that

matches use pattern to save energy and

improve performance.

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

OFF

Set the OFF:

▶Touch the symbol , to select OFF.

Recirculation will not be active.

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Domestic hot water recirculation - Outdoor models

Direct recirculation through the tankless water heater is

permissible, however, the heat exchanger warranty is reduced;

see warranty at www.boschheatingandcooling.com.

The following drawings are provided to illustrate possible

recirculation designs. These schematics are for illustration only

and must not be used for actual Installation without

appropriate engineering and technical advice from a properly

licensed professional in the locality where the installation is

made.

This appliance has been designed to permit recirculation by

controlling an external pump. For this function, the external

pump must be electrically connected to the appliance - Bosch

cable accessory is available.

Fig. 7 Recirculation application with a dedicated return

line

1Cold water supply

2Check valve field supplied

3Circulator pump field supplied

4Expansion tank field supplied

5Circulator cable accessory

6PRV

7Shutoff valves field supplied

8Greentherm T9800 SEO / SECO

Fig. 8 Recirculation application using the cold water line

and cross-over valve

1Cold water supply

2Check valve field supplied

3Circulator pump field supplied

4Expansion tank field supplied

5Circulator cable accessory

6PRV

7Shutoff valves field supplied

8Greentherm T9800 SEO / SECO

9Cross-over valve, field supplied

Recirculation application showed in fig. 8 is

for Greentherm T9800 SEO/SECO.

Models with build-in pump cannot be used.

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Recirculation options

House Recirculation

This recirculation option uses the appliance's NTC sensor along

with the optional schedule to control the pump (only with

remote control).

Tank loading

This recirculation option gives the option of using one of three

temperature sensors to control the recirculation option. The

scheduling option is not available for tank loading, except for

commercial models and with Bosch remote control.

•External NTC - 7 736 504 583

– Only compatible with Bosch cable/sensor accessory

(7736504583).

•Aquastat - 7 736 504 584

– The aquastat connector kit (7736504584) must be

used to connect a field supplied aquastat to the

appliance.

•Internal NTC

– Uses the appliance's NTC sensor to measure the

incoming water temperature.

SA (Settings)

This section only applies to the Greentherm T9800 outdoor

models.

Fig. 9 SA - Settings

This menu provide access to several parameters.

▶Access to information / adjustments menu.

Display shows P4 (Information).

▶Press the button until the display shows SA

(Settings).

▶Press the button .

Display shows E.

▶Press buttons or to choose the following

information.

–E Exit

–A1 Recirculation

–A8 Startup Delay

–A9 Units Set

–Ab Region Selection

–rS Recirculation Settings

▶Press the button to select the desired information.

A1 Recirculation

Choosing a recirculation program:

▶Press the button .

▶Press buttons or to scroll through the options.

–OF OFF

–rE House Recirculation

–tI Tank Loading Internal NTC

–tE Tank Loading External NTC

–tA Tank Loading Aquastat

▶Press the button to exit recirculation menu.

RS Recirculation Settings

To define recirculation comfort level,

▶Press the button .

▶Press buttons or to define comfort level.

–1

–2

–...

–9

Choosing a higher comfort level (9) will set the

recirculation water temperature closer to the set point

defined on the water heater. Choosing a lower value (1) will

favor efficiency at the expense of recirculation temperature

comfort.

▶Press the button to select value and to exit

Recirculation Settings.

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Recirculation de l'eau chaude sanitaire - modèles d'intérieur

La recirculation directe à travers le chauffe-eau est permise,

cependant, la garantie de l'échangeur de chaleur est réduite;

Voir la garantie sur www.boschheatingandcooling.com.

Les dessins suivants sont fournis pour illustrer deux possibili-

tés de recirculation. Ces schémas sont uniquement à titre

d'illustration et ne doivent pas être utilisés pour une installation

réelle sans conseils techniques fournis par un professionnel

dans la localité où l'installation est faite.

Procédure de démarrage

▶Ouvrez un robinet d'eau chaude et froide pour remplir le

circuit d'eau.

▶Allumer l'appareil.

▶Ouvrir la vanne d’alimentation en gaz.

▶Attendre l'absence d'air dans le circuit de recirculation

(quelques minutes).

▶Fermer les robinets d'eau.

Le système de recirculation est opérationnel.

Options de recirculation

Recirculation dans l'habitation

Cette option de recirculation utilise le capteur NTCde l'appareil

ainsi que la programmation facultative pour commander la

pompe.

Chargement du réservoir

Cette option de recirculation permet d'utiliser l'un des trois

capteurs de température pour contrôler l'option de recircula-

tion. L'option de planification n'est pas disponible pour le char-

gement du réservoir, sauf pour les modèles commerciaux.

•Sonde externe

– Compatible uniquement avec le câble / capteur Bosch

(7736504583).

•Aquastat

– Le kit de connecteur aquastat (7736504584) doit être

utilisé pour raccorder un aquastat à l'appareil.

•Sonde interne

– Utilise le capteur NTC de l'appareil pour mesurer la

température de l'eau entrante.

Pour plus d'informations sur la programmation de chaque

menu, voir instruction d’installation et de fonctionnement du

appareil.

Afin de réduire les pertes de chaleur des

tuyaux, il est recommandé d'isoler toutes les

tuyaux du circuit de recirculation.

AVERTISSEMENT : Endommagement de

l'appareil!

▶S'assurer que le circuit d'eau est rempli

avant d'activer le mode de recirculation.

Recirculation Pump Kit 7 736 504 585

6 720 819 502 (2023/09)

Recirculation avec ligne retour dedicacée

Fig. 10 Application de recirculation avec ligne retour dedi-

cacée

1Alimentation en eau froide

2Clapet anti-retour, fourni sur place

3Pompe du circulateur, fournie sur place

4Vase d’expansion, fourni sur place

5Câble du circulateur, accessoire

6Greentherm 9800 SE / SEC

7SD

8Vannes d’arrêt, fournies sur place

Recirculation avec “cross-over” valve

Fig. 11 Application recirculation avec alimentation eau

froide et vanne cross over

1Alimentation en eau froide

2Clapet anti-retour, fourni sur place

3Vase d’expansion, fourni sur place

4Pompe du circulateur, fournie sur place

5Câble du circulateur, accessoire

6Greentherm 9800 SE / SEC

7SD

8Vannes d’arrêt, fournies sur place

9Cross-over vannes, fournies sur place

Indice

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