Bosch 15SBI Service Manual download pdf (Page 9)

Fig. 9. Central heating by-pass adjustment

Filling Loop

Filling Key

Filling Knob

NOTE:

Always remove

the filling key

after filling

Fig. 8. Filling Loop. Fig. 8a. Filling Key inserted for filling.

Fig. 7. System layout if using twin zone valves (S) plan.

Central Heating

System By-Pass

Adjustment Screw

Use Flat Bladed

Screwdriver to

make adjustment.

LV LV

INDIRECT

CYLINDER

APPLIANCE

Refer to fig.1.

Appliance

Water

Flow

Diagram

Heating Return

Heating Flow

Safety Discharge

Cylinder Return

Hot Water Flow

Stop Valve Fixed Cylinder Type

Mains Cold Water

Radiator Valve - Flow RV

Lockshield Valve - Return LV

Note:

A drain cock

should be fitted

at the lowest

point of the

heating circuit

and beneath

the appliance

Zone

Valve

DHW Zone Valve

IMPORTANT

For Details of

the wiring

requirements

for the system

controls,

please refer to

the SBi system

wiring guide.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 36 37

15SBi / 24SBi 1
Contents 2
Fig. 1. Water flow diagram 3
3. Technical Data 4
4. Siting The Appliance 6
8. Domestic Hot Water 8
7. Sealed System 8
Radiator Valve - Flow RV 9
Green/yellow 10
* A Mid-Position Valve is 12
11. Installing The Appliance 13
(Optional) 15
Fig.23 . Extension Duct 16
Fig.25 . Rear flue 16
Fig.26 . Flue Turret Fixing 17
Fig. 28. Flue bends 17
Fig.33. Rear Connection Point 18
Fig.30 Vertical Adapter 18
Fig.35. Auto air vent 19
Fig. 36. Pump venting 19
Fig. 39. Gas Valve 20
15. Replacement Of Parts 21
14. Inspection And Service 21
13. Instructions To The User 21
Fig. 41. Inner Casing 15SBi 22
Fig. 42. Inner Casing 24SBi 23
Fig.44 . Burner and Electrode 24
Controls 24
Pump head 26
Fig.52 . Expansion Vessel 27
16. Short Parts List 28
I AUTO O 29
17. Operational Flow Diagram 30
FACIA INDICATOR TEST 31
BOILER DEMAND TEST 32
SYSTEM TEST 35
Bosch Group 36

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Bosch 15SBI Service Manual Page 9

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