5
Tank installation
Logano G334X – 6 720 811 237 (2014/05)
11
5.4.2
Connect the central heating supply and return
Connecting the safety valve in the central heating supply
▶ Install the included supply manifold and the 90° elbow.
▶ Do not install the safety valve until the leak test has been completed.
▶ Install the safety valve in accordance with the requirements of the
ANSI/ASME Boiler and Pressure Vessel Code, Section IV.
Fig. 11 Supply connection
[1]
Boiler
[2]
Safety valve
[3]
Supply manifold pipe (factory-installed)
[4]
90° elbow (¾ " NPT)
[5]
Supply connection
5.5
Electrical connections
The electrical connections to the boiler must conform to the locally
applicable regulations and the relevant requirements of the National
Electrical Code, ANSI/NFPA-70. In Canada the regulations of CSA C22.1
Canadian Electrical Code, Part 1, must be observed.
The boiler must be grounded in accordance with the regulations of the
relevant authorities or else the requirements of the National Electrical
Code, ANSI/NFPA-70.
NOTICE:
Risk of system damage due to excessive
temperature differences in the heating system!
▶ If the boiler is operated in conjunction with an air
conditioning system, it is essential to ensure that the
pipes for the refrigerant fluid are connected in
parallel with the boiler system by means of suitable
valves to prevent the refrigerant from entering the
boiler. This prevents refrigerant fluid from entering
the boiler.
▶ If the boiler piping is connected to the heating coils of
a hot-air heating system, these may be exposed to
the circulation of cool air. In this case, the boiler
piping must be equipped with a flow-control valve or
some other automatic system for preventing the
boiler water from circulating by gravity during the
cooling cycle.
NOTICE:
Risk of system damage due to leaking
connections!
▶ Connect pipes without stress to the boiler
connections.
DANGER:
Risk of fire from flammable materials!
▶ Maintain a clearance of 2 inches (51 mm) from pipes
carrying hot water and flammable walls in the
installation room.
We recommend installing a dirt trap and a dirt separator
(accessory) in the heating return connection to reduce
build-up of debris on the water side.
Observe the local regulations for connection of boiler
systems.
NOTICE:
Risk of system damage due to faulty safety
valve!
During the leak test, the safety valve can be damaged.
▶ Do not install the safety valve until the leak test
(
Chapter 5.8 Filling heating system and checking
for leaks, page 16) has been completed.
The safety valve must be installed in a vertical position.
DANGER:
Danger to life from electric shock!
▶ Carry out electrical work on the heating system only
if you are properly qualified for the work in question.
If you do not have the proper qualifications, have the
work done by a suitably qualified electrician.
▶ Observe the local regulations.
▶ Incorrectly terminated cables can result in faulty
operation and possibly dangerous consequences.
When making the power connection, follow the
circuit diagrams on page 36.
▶ When performing maintenance, label all connection
cables before disconnecting them.
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6 720 806 028-17.1T
Summary of Contents for G334X
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