0 installation, 12 n 3 – Baxi Potterton BBU 15 HE User Manual

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7.0 Installation

7.3

Siting the Boiler

IMPORTANT - This product should be lifted and

handled by two people. Stooping should be avoided and

protective equipment worn where necessary. Carrying

& lifting equipment should be used as required, e.g.

when installing on another floor.

1. Lift the boiler from the packing base and place into the

opening.

2. Align the boiler centrally as far back in the opening as

possible, and ensure the distance between each side and

the opening is equal. Check that the boiler is level.

3. Mark the hearth through two of the slots in the base

(Fig. 35). Remove the boiler and drill the hearth. Insert

suitable plugs. Replace the boiler & check the alignment

within the opening. Secure the boiler with suitable screws.

7.4

Water Connections

1. The boiler has one return and one flow connection. The

flow is the upper connection. It is essential the flow and

return pipes are connected correctly (Fig. 36).

7.5

Gas Connection

1. Connection to the gas supply is a 15mm compression

fitting on the gas cock. The gas supply pipe must be routed

from the right hand side.

2. The positioning of the gas supply pipe must not restrict

the servicing of the boiler or installation of the firefront.

7.6

Electrical Connection

1. The boiler requires an electrical supply from the heating
controls system.

WARNING: The appliance must be earthed.
The input cable for the appliance should be 0.75mm

IEC Code 227 (heat resistant). The system external
controls and the boiler must be supplied by the same
isolator.

The boiler MUST NOT be connected to the

same supply as the firefront as their fuse ratings are
different.

7.7

Making the Electrical Connection

1. Take the 5 pin plug from the boiler fitting kit, remove
the securing screws and hinge the cover open.

2. Route the mains inlet cable under the cable clamp and
connect Permanent Live, Neutral & Earth to 3, N &
respectively. Ensure that the Earth lead is longest.

3. Connect the switched output from the system external
control system to terminal 1.

4. Refit the cover, tighten the screws to secure the cable
and connect the plug to the one on the boiler.

Fixing Slot

Condensate

Discharge (remove

plug before connection)

Return

Flow

Fig. 35

Fig. 36

Fig. 37