Unical MODULEX EXT 100, Installation And Servicing Instructions

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19
Instructions for the installer
3.7 - GAS CONNECTION
The gas supply pipe must be connected to the boiler via the
respective pipe connection
R 1½
as indicated on page 8.
The gas supply pipe must have a section which is identical
or greater then the one used on the boiler and must assure a
correct gas pressure.
It is however important to comply with the specific norms and
requirements in force, foreseeing on-off valves, gas filter, anti-
vibrating joint etc.
WARNING:
In order to protect the boiler it is suggested
to install a filter at the connection of the gas
feeding pipe.
This filter has to be easily inspectable and
conveniently sized in order to grant the sup-
ply pressure required by the boiler.
Before commissioning an internal gas distribution system and
therefore before connecting it to the gas meter, the complete
installation must be tested for gas soundness.
If any part of the system is concealed from view the gas sound-
ness test must be carried out before covering the pipes.
Before installing the boiler it is recommended to
thoroughly clean all the supply piping in order to
remove any eventual residual grime which could
compromise the boilers correct functioning.
If you smell gas:
a. Do not turn on or off electrical switches, use
the telephone or any other object which can
provoke sparks;
b. Open all doors and windows in order to
allow fresh air to enter and purify the room;
c. Close all gas cocks
d.
Contact a service engineer, qualified
installer or the gas supply company.
As a safety measure against gas leaks, Unical
recommends installing a surveillance and protec-
tive system made up of a gas leakage detector
combined with an on-off selenoid valve on the
gas supply line.
1. On-off gas supply valve
2. Double membrane regulator
3. Gas filter
4. Anti-vibrating joint
5. Selenoid valve
6. On-off cock
EXAMpLE OF A GAS SUppLY SYSTEM
INSIDE
BOILER
ROOM OUTSIDE
BOILER
ROOM
DANGER!
The gas connection must be carried out by a
registered engineer who will have to respect
and comply to the regulations in force and
to the requirements indicated by the local
gas supplier. An incorrect installation could
cause injury to persons, animals or damage
to property. The manufacturer shall not be
held liable for any injury and/or damage.