Sliding The Supply Pipe Into Place; Sealing The Immersion Sleeve; Leak Test; Carrying Out Leak Test - Buderus Logano G315 Installation And Service Instructions Manual

7.4

Sliding the supply pipe into place

▶ Push the flat gasket (Fig. 21, [1]) over the supply pipe (Fig. 21, [4]).
▶ Push the supply pipe from the front into the top boiler hub.
▶ Close off with flange cover (Fig. 21, [2]).
The supply pipe must be fixed in such a way that the
holes on the supply pipe are positioned at the correct
angle. This ensures optimum distribution of water in the
area of the top boiler hub.
▶ Make sure that the cam [3]) on the end plate of the
supply pipe ( Fig. 21, [3]) fits in the notch in the
top boiler hub ( Fig. 21, [5]) (Thermostream
principle).
3 4
2
1
Fig. 21 Installing the supply pipe
7.5

Sealing the immersion sleeve

▶ Seal sensor well R ¾ (length: 110 mm) (Fig. 22, [1]) from the top
into the R ¾ tapped hole in the supply connection (Fig. 22, [2]).
Fig. 22 Fitting the sensor well
Logano G315 – 6 720 817 939 (2017/02)
5
720 42 21-1 .1o
1
2
720 42 21-17.1o
7.6

Leak test

Perform a leak test of the boiler block only when the boiler was delivered
disassembled. Pre-assembled blocks are leak tested at the factory.
For details of assembling the remainder of the boiler if the block is
delivered pre-assembled, see  Chapter 10, page 30.
7.6.1

Carrying out leak test

NOTICE: Risk of system damage from overpressure.
▶ Ensure that no pressure, control or safety equipment
is fitted during leak tests.
The testing pressure is based on the normal operating pressure of the
heating system and should be 1.3 times that pressure, and in any case
no less than 58 psi (4 bar).
Use a pressure gauge class 1.0 to measure the pressure.
▶ Close off lower boiler hub (Fig. 23, [3]) at the front and rear. To do
this, place corresponding seal (Fig. 23, [1]) on the relevant boiler
hub and seal-in the relevant sealing plug. In this case, the sealing plug
with the R ¾ tapped hole for the fill and drain connection (Fig. 23,
[2]) is mounted on the rear of the boiler.
▶ Install the on-site fill and drain valve.
▶ Close off supply and return connections (mount flange with purger on
supply connection).
3
Fig. 23 Fitting the flange
▶ Slowly fill the boiler with water via the fill and drain connection. While
doing this, purge the boiler via the boiler flow connection with
purger.
7
Boiler block assembly
1
2
720 42 21-18.1o
17