17
Instructions for the installer
- The boiler room has a suitable outlet for the discharge of
condensate produce by the boiler.
- The electrical system has been fitted in compliance to the
specific norms and the work has been carried out by a
competent person.
- The circulation pump’s output, the head and flow direction
are suitable.
- The gas feeding supply pipe and the eventual tank are
constructed according to the regulations in force.
- The expansion vessels assure the total absorption of the
dilatation of the fluid contained in the system.
- The system has been cleaned of impurities and lime scale.
3.5 - INSTALLATION ON EXISTING
HEATING SYSTEMS
When the appliance is installed on existing systems, ensure
yourself that:
- The flue outlet pipe is suitable for condensing boilers, for
the temperature of the products of combustion, calculated
and manufactured according to the regulations in force. It
must be installed as much as possible in a straight line,
tested for soundness, insulated and must not have any
occlusions or restrictions.
- The flue outlet pipe has a connection for the discharge of
condensate.
3.6 - GAS CONNECTION
The gas supply pipe must be connected to the boiler via the
respective pipe connection ¾” as indicated on page 13.
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.
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
soundness test must be carried out before covering the pipes.
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.
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
protective system made up of a gas leakage
detector combined with an on-off selenoid
valve on the gas supply line.
1 2 3 4 5 66
INSIDE
BOILER
ROOM
OUTSIDE
BOILER
ROOM
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
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