Bosch 830ES Manuale di riferimento

Technical Service Bulletin:

Resetting the Watervalve

Models: 830ES, 940ES-ESO, C950ES, C1050ES, 1210ES-ESC, T9800/T9900 SE(C)

Data subject to change without notice | Printed in the USA | BTC 740002333 A | 05.2018 Bosch Thermotechnology Corp.

A qualiﬁed service technician is recommended to perform the work.

Problem

Tankless water heater that doesn’t activate, and doesn’t show an error code.

Possible Cause

The watervalve may be clogged or needs to be reset.

Overview

Sometimes a tankless water heater doesn’t start up when water is turned on (above

activation rate), and also doesn’t give an error code. This can be due to the impeller

in the watervalve being stuck or clogged, the water valve being closed, or even just

a clogged inlet ﬁlter. Some of the models have an inlet ﬁlter accessible from outside

the machine, which you can inspect for debris ﬁrst. Other models have it directly

in line with the watervalve, in which you will have to disconnect and remove the

watervalve for access.

Procedure

1. Drain the machine down of any water on both the hot and cold sides.

2. Remove the inlet and outlet water clips and remove watervalve from the

machine. After it is removed, disconnect all wiring to the watervalve.

Inspect the screen for any blockage and clean if necessary.

3. Remove the 2 Phillips head screws that hold the watervalve engine to the

watervalve body (Fig. 1).

Figure 1

4. Remove the 2 Phillips head screws that hold the watervalve engine to the

watervalve body (Fig. 1).

5. Separate the 2 the watervalve body and the watervalve engine.

6. On the valve side, locate the brass gear. Rotate the gear counter clockwise

(towards the “0”) until it stops (Fig. 2).

Figure 2

Data subject to change without notice | Printed in the USA | BTC 740002333 A | 05.2018 Bosch Thermotechnology Corp.

Technical Service Bulletin

2 | Resetting the Watervalve

Bosch Thermotechnology Corp.

65 Grove Street

Watertown, MA 02472

Tel: 1-866-642-3198

Fax: 1-954-776-5529

www.boschheatingandcooling.com

7. On the motor side, slowly rotate the gear clockwise to “0” (Fig. 3). There are

gears inside this motor that cause resistance, do not try to move it fast or

you will damage the gearing.

Figure 3

8. Once that is completed, make sure you can blow through the valve freely

from the bottom where the cross diverter is (Fig. 4). When you forcefully

blow through the valve, you should hear the impeller spinning. If not, use

a small pick or similar device to manually move it. It should move freely

with no resistance. Any resistance could be signs of buildup inside the

valve. Flushing out the valve at this point would be your only way to clear

that obstruction. The impeller is not removable on these valves. If it can’t

spin freely by ﬂushing out the valve or manually rotating it, you may need to

replace the valve.

Figure 4

9. After performing the service, attach the watervalve engine to the watervalve

body with the 2 phillips head screws as shown in Fig. 1.

10. Plug the wiring back in, and reinstall the clips on both the incoming and

outgoing side of the valve.

11. Slowly turn on water supply to check for leaks, before powering up and

returning the tankless unit to service

Altri manuali per 830ES

Questo manuale è adatto per i seguenti modelli

Altri manuali Bosch Scaldabagno

Bosch

Bosch SST150-40 Manuale utente

Bosch

Bosch AE12 Manuale utente

Bosch

Bosch Greentherm 9800 SEO 160 Manuale utente

Bosch

Bosch TR5000R Series Manuale utente

Bosch

Bosch Integra 500 Manuale utente

Bosch

Bosch Tronic 3000 C Pro US12 Manuale utente

Bosch

Bosch Greentherm T9800 SEC 160/199 Istruzioni per l’uso

Bosch

Bosch WR430-7K Istruzioni per il montaggio

Bosch

Bosch TR3500T Series Manuale utente

Bosch

Bosch RDE 1821415 Manuale utente

Bosch

Bosch TR1000 4 T Manuale utente

Bosch

Bosch TRONIC 5000T ES30M Manuale utente

Bosch

Bosch 125B LP Manuale

Bosch

Bosch GWH-425-EF-N Manuale utente

Bosch

Bosch TR4000 Manuale utente

Bosch

Bosch C 1210 ESC Manuale di riferimento

Bosch

Bosch GWH C 920 ES Manuale di riferimento

Bosch

Bosch HydroPower 10H Manuale utente

Bosch

Bosch AquaStar 125B NGS Manuale utente

Bosch

Bosch Stora WS 300-5 PK Istruzioni operative

Bosch

Bosch GWH-425-HN-N Manuale utente

Bosch

Bosch Therm 8000 S GWHC 27 CTDE Manuale utente

Bosch

Bosch Tronic TR4500T 50 EB Manuale utente

Bosch

Bosch AquaStar 125FX LP Manuale utente

Manuali Scaldabagno popolari di altre marche

Kenmore

Kenmore 153.582400 Manuale utente

Applimo

Applimo Edel AIR Manuale utente

STIEBEL ELTRON

STIEBEL ELTRON Eltronom SHU 5 S Manuale utente

clage

clage E-Mini Series Manuale utente

Toyotomi

Toyotomi Oil Miser OM-180 Manuale utente

Bradford White

Bradford White EF Series Manuale utente

Eccotemp

Eccotemp 40-H Manuale utente

Dimplex

Dimplex ECSd125-580 Guida

Dux

Dux 32FCR6N Manuale utente

Toyotomi

Toyotomi Oil Miser OM-148 (Type D) Guida alla risoluzione dei problemi

Noritz

Noritz N-132M Manuale di istruzioni

TESY

TESY GCV7/4S 10047 Scheda tecnica

A.O. Smith

A.O. Smith Gphe 50 Manuale utente

Koryo

Koryo KWHZF15Y Manuale utente

Pentair

Pentair PSC-14-4-02 Manuale utente

GE 40M06AAG Istruzioni per il montaggio

Thermor

Thermor AEROMAX SPLIT 2 Manuale utente

American Hometec

American Hometec AHQ-B03X Manuale utente