Connecting The Fuel Supply; Installing Gas Feed - Buderus LOGANO PLUS GB312 Installation Instructions Manual

6
Installing the boiler
CAUTION: Risk of system damage due to unsuitable
heating system water.
▶ Pay attention to the quality of the water used to fill the
heating system. Poor water quality can damage
heating systems due to scale formation and
corrosion. For further details, please see the
accompanying "Water quality requirements for
Logano plus GB312" manual.
Maximum operating pressure
[psi]
50 with the pressure relief
valve supplied
Table 11 Operating pressure and test pressure
CAUTION: Health risk from contaminated domestic
water.
▶ Observe all regulations and standards applicable in
your country regarding the prevention of drinking
water contamination.
▶ Connect the hose to the water tap. Push hose onto the hose
connection of the boiler fill & drain valve, fasten with a hose clip and
fill with water.
▶ Turn on the boiler fill & drain valve.
Slowly fill the heating system. Observe the pressure gauge (pressure/
temperature gauge) while doing so.
▶ Turn off the water tap and the boiler fill & drain valve once the required
testing pressure has been reached.
▶ Check the connections and piping to make sure they are watertight.
▶ Bleed the boiler by carefully opening the safety valve or an automatic
vent (supplied separately) on the B-kit when the boiler circulation
pump is running.
▶ Bleed the heating system via the purge valves on the heating bodies.
▶ Top up with water if the pressure drops as a result of bleeding the
system.
▶ Remove the hose from the boiler fill and drain valve.
1
Fig. 29 Boiler fill & drain valve on return pipe
[1] Boiler fill & drain valve
28
Maximumtesting pressure
[psi]
75
7 747 010 720-25.1RS

6.11 Connecting the fuel supply

DANGER: Risk of fatal injury from the explosion of
flammable gases.
▶ Work on gas components may only be carried out by
qualified and authorized personnel.

6.11.1 Installing gas feed

For details of the required gas pipe diameter, refer to table 12 and
table 13 on page 29. Make absolutely sure that the pipe fittings have the
correct thread size.
▶ Make sure that a sediment trap is fitted at the inlet for the gas supply
pipe to the boiler.
Fit and seal the gas isolating valve supplied to the boiler's
gas connection.
▶ The gas pipes must be fastened outside the boiler.
Observe the local regulations or else the requirements the National Fuel
Gas Code, ANSI Z 223.1 or CAN/CSA B149.1 in Canada, when
connecting the gas supply.
Where required by local regulations, the installation must comply with
the American Code for Controls and Safety Devices for Automatically
Fired Boilers (ASME CSD-1). Accessories to comply with ASME CSD-1
are available (please see page 85 and 66 in parts list).
DANGER: Risk of explosion
Leaking gas lines and gas connections create the risk of
explosions.
▶ Carry out a proper leakage test using soap solution.
1
2
3
Fig. 30 Gas valve pipe connection
[1] Gas supply
[2] Manual shut-off valve (supplied)
[3] Sediment trap
[4] Gas connection with isolating valve
Logano plus GB312 – 6 720 647 367 (2012/11)
4
7 747 010 720-22.1RS