Installation
23
Bosch Condens 5000W – 6 720 646 195 (2018/10)
4.4 Boiler connections
CAUTION:
▶ Isolate the mains gas supply before starting any work and observe all
relevant safety precautions.
Optional internal diverter valve
▶ If the optional integral diverter valve kit is required, fit the kit now
before hanging the boiler on the wall frame.
Metric to imperial adapters
Before mounting the wall frame:
▶ Before mounting the wall frame, fit the metric to Imperial adapters to
the central heating and gas isolators.
▶ Remove the nut and olive from the back of the isolator.
▶ Refer to figure 26 and fit the nut and olive onto the adapter and
mount onto the back of the isolators.
Fig. 26 CH and gas adapters fitting
[1] Central heating isolation valve
[2] Gas isolation valve
[3] Compression ring
[4] Compression nuts
[5] Metric to imperial adapter (22mm to R¾)
Wall mounting frame
▶ Remove wall mounting template and secure the wall mounting frame
to the wall with the appropriate fixings for the boiler weight and wall
type.
▶ System pipes may be run vertically upwards behind the boiler or
below it. See Plumbing manifold section on page 16.
Fit sealing washers to service valves before hanging boiler.
1. CH flow BSP 20
2. Gas inlet BSP 20
3. CH return BSP 20
▶ Fit the metric to imperial (15mm to R½) adapter [4] to the pressure
relief valve connection [1].
▶ Assemble the compression nut [3] and ring [2] onto the adapter [4]
and fit to the PRV connection [1].
Fig. 27 Sealing washers and PRV adapter fitting
[1] PRV connection
[2] Compression ring
[3] Compression nut
[4] 15mm to R½ adapter
NOTICE:
Before hanging the boiler onto the wall mounting frame
▶ Ensure that the pressure relief valve connection is in the down
position.
This is located on the right hand side of the wall frame at the rear.
Apply a smear of silicone lubricant to the seal to ease connection
later.
1. Pull the extended tab/lever forward and down until there is no further
travel.
Fig. 28 PRV connection in the down position
6720646195-03.1Wo
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5
6720646195-04.1Wo
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6720644743-16.1Wo
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