Troubleshooting; Spare Parts; Accessories - Bosch Buderus 7738306430 Notice De Montage

11. Troubleshooting

11.1. Filter combination
Problem
Water is escaping from the spring
bonnet
Too little or no water pressure
The outlet pressure set does not
remain constant
11.2.Reverse rinsing filter
Problem
Too little or no water pressure

12. Spare Parts

No. Description
1 Valve insert complete
2 Filter insert complete
Filter mesh 95/110 µm
Filter mesh 50 µm
Filter mesh 200 µm
3 Clear filter bowl
complete
4 Pressure gauge
rear connection thread G1/4"
Range 0 - 16 bar
5 Wrench for removing
filterbowl and spring
bonnet
6720803833
Cause
Diaphragm in valve insert is faulty
Shutoff valves upstream or downstream
from filter not fully open
Pressure reducing valve is not set to the
desired outlet pressure
Filter mesh dirty
Not fitted in flow direction
Filter mesh dirty
Valve insert, sealing ring or edge of
nozzle is contaminated or worn
Rising pressure on outlet (e.g. in boiler) Check check valve, safety group etc.
Cause
Shutoff valves upstream or downstream
from filter not fully open
Filter mesh dirty
Not fitted in flow direction
Dimension Part No.
/ " - 1 / " 7738309056
3 1
4 4
/ " - 1 / " 7738309057
3 1
4 4
/ " - 1 / " 7738309058
3 1
4 4
/ " - 1 / " 7738309059
3 1
4 4
/ " - 1 / " 7738309062
3 1
4 4
7738309060
7738309061
en
Remedy
Replace valve insert
Open the shutoff valves fully
Set outlet pressure
Reverse rinsing
Fit filter in flow direction (note direction of arrow
on housing)
Reverse rinsing
Replace valve insert
Remedy
Open the shutoff valves fully
Reverse rinsing
Fit filter in flow direction

13. Accessories

Z74S-AN Automatic reverse rinsing actuator
For automatic filter cleaning at presettable
intervals
12 2012/05