Checking The Size Of The Expansion Vessel; Installing The Device - Bosch Gaz 6000 W Installation And Maintenance Instructions Manual

5.4

Checking the size of the expansion vessel

The following graph permits the approximate estimation of whether the
installed expansion vessel is sufficient or whether an additional
expansion vessel is required (not for underfloor heating system).
The following key data was taken into account for the curves shown:
• 1 % Water seal in the expansion vessel or 20 % of the rated volume in
the expansion vessel
• Operating pressure differential for the pressure relief valve of 0.5 bar
• Pre-charge pressure of the expansion vessel corresponds to the
static system head above the wall mounted boiler.
• Maximum operating pressure: 3 bar
T[°C]
90
80
70
5
4
60
50
40
A
30
0 100 200 300
Fig. 11 Curves of the expansion vessel 6 l (appliance output < 35 kW)
T[°C]
90
80
70
5
60
50
A
40
30
0 100 200 300
Fig. 12 Curves of the expansion vessel 8 l (appliance output =35 kW)
Legend to fig. 11 and 12:
1 Pre-charge pressure 0.5 bar (default setting)
2 Pre-charge pressure 0.75 bar
3 Pre-charge pressure 1.0 bar
4 Pre-charge pressure 1.2 bar
5 Pre-charge pressure 1.3 bar
T Supply temperature
V System content in litres
A Operating capacity of the expansion vessel
B Additional expansion vessel required
▶ If results are borderline: determine precise vessel size.
▶ If the intersection is on the right beside the curve: install an additional
expansion vessel.
Gaz 6000 W – 6720866247 (2019/07)
B
3
2
1
400 500 600 700
V[l]
0010016552-003
B
4
3
2
1
400 500 600 700
V[l]
0010016554-002
5.5

Installing the device

Making drill holes and the wall opening
▶ Secure the mounting template supplied with the printed documents
to the wall; when doing so, observe the minimum side clearances of
100 mm (  page 7).
▶ Drill the holes for the screw hooks according to the mounting
template.
▶ If required: create wall opening for flue accessories.
+1 75
5
0
S8 x 60mm .
Fig. 13 Mounting template
▶ Remove mounting template.
Hanging the appliance
▶ Remove packaging, observing all notes on the packaging.
▶ On the data plate, check the designation of the target country and
suitability for the gas type supplied by the local gas supplier.
1. Fit rawl plug.
2. Fit screw hooks.
3. Position the appliance on the wall and mount it on the screw hooks.
3.
Fig. 14 Mounting the appliance on the screw hooks
Installation
160 mm.
75
+1
5
0
S8 x 60mm .
345 1
264
1
134
1
35
1.
2.
0 001 005 947-001
17