Logano G334X Installation And Service Instructions Manual - page 16
5
Tank installation
Logano G334X – 6 720 811 237 (2014/05)
16
5.7.3
Installing at high altitudes
The boiler is designed for installation at altitudes below 8500 feet above
sea level. The boiler must be converted appropriately for installation
above altitudes of 8500 feet. The conversion consists of replacing the
main gas orifices.
5.8
Filling heating system and checking for leaks
The boiler is tested for leaks at the factory. Before putting the heating
system into operation, it must be checked to ensure that no leaks will
occur during operation.
▶ Seal off connection for safety valve in the heating supply.
▶ Close off all other unused connections with plugs.
▶ Isolate the expansion tank from the system by closing the cap valve.
▶ Open the mixing and shutoff valves on the heating water (primary)
side.
▶ Slowly fill the boiler with tap water from the on-site fill valve.
▶ Open the cap of the automatic air vent by one full turn. This allows air
to escape.
▶ Slowly fill heating system. Observe the pressure gauge whilst filling.
Fig. 21 Temperature/pressure gauge
▶ Check the connections and pipework for leaks.
▶ Bleed the heating system via the purge valves.
If the operating pressure drops as a result of bleeding the system:
▶ Add water to the system.
▶ Install safety valve.
If the installation location is over 8500 feet above sea
level, please contact Buderus for the required
conversion components.
Do not attempt to restrict the gas flow without the
approved Buderus parts and relevant technical
documentation for conversion.
The technical documentation is included with the
conversion components (accessory).
WARNING: Risk of system damage due to excess
pressure when testing for leaks!
Pressure, control and safety equipment may be
damaged by excessive pressure.
▶ When you carry out a leak test, make sure that no
pressure, control or safety device that cannot be
isolated from the boiler's water chamber is installed.
WARNING: Health risk from contaminated drinking
water!
▶ Always observe the regulations and standards
applicable in your jurisdiction for the prevention of
contamination of drinking water (e. g. by water from
heating systems).
NOTICE: Risk of damage to system due to temperature
stress!
If you fill the heating system when it is hot, the resulting
temperature stress can cause stress cracks. The boiler
will then leak.
▶ Only fill the heating system when it is in a cold state.
Maximum permissible supply temperature 100 °F
(38 °C).
Water treatment
▶ Have the water analyzed before filling the heating
system.
▶ Compare the results of this analysis with the
technical documentation on water quality for boiler
water.
▶ Please consult the local water supply company if
there are major differences, such as extremely hard
water or a pH value below 7.0.
Carry out the leak test at 1.5 times the normal operating
pressure (
Tab. 10) and in accordance with the local
regulations.
Maximum
operating pressure
Maximum
site test pressure
30 psi (2.1 bar)
with the included safety valve
45 psi (3.1 bar)
58 psi (4 bar)
with a different safety valve
75 psi (5.2 bar)
Table 10 Test pressures
NOTICE: Risk of system damage due to faulty safety
valve!
▶ Do not install the safety valve until the leak test
(
Chapter 5.8) has been completed.
▶ Install the safety valve vertically.
▶ Install the safety valve in accordance with the
requirements of the ANSI/ASME Boiler and Pressure
Vessel Code, Section IV.
▶ Observe the local regulations for connection of boiler
systems.
7 747 019 141-17.1RS