efficient, and reliable operation as specified. Approved permanent and
ready facilities to permit periodic valve leakage tests on the safety
shutoff valve or valves shall be provided.
3.4
FUEL OIL SYSTEM
Fuel oil system shall be installed in accordance with NFPA 31, unless
otherwise indicated.
3.4.1
Piping and Storage Tank
Fuel oil piping and storage tanks shall be installed in accordance with
Section 13202 FUEL STORAGE SYSTEMS, unless indicated otherwise.
3.4.2
Fuel-Oil Storage Tank Heating-Coil Piping
Supply and return piping and fittings for the heating coil shall be
installed in accordance with paragraph PIPING INSTALLATION. The [hot
water] [steam] supply line to the heating coil shall be provided with an
automatic temperature-control valve, a strainer and a three-valve bypass.
The return line from the coil shall be provided with a [check valve] [steam
trap] and a block valve.
3.4.3
Automatic Safety Shutoff Valve
Oil supply line to each oil burner shall be equipped with an automatically
operated valve designed to shut off the oil supply in case of fire in the
immediate vicinity of the burner. The valve shall be thermoelectrically
actuated or thermomechanically actuated type and shall be located
immediately downstream of the manual shutoff valve at the day tank inside
of the building. If a day tank is not used, the automatic safety valve
shall be located immediately downstream of the building shutoff devices
where oil supply line enters the building. A thermoelectrical or
thermomechanical detection device shall be located over the oil burner to
activate the valve. A fire shutoff valve may be combined with other
automatic shutoff devices if listed in UL Gas&Oil Dir.
3.4.4
Earthwork
Excavation and backfilling for tanks and piping shall be as specified in
Section 02300 EARTHWORK.
3.5
RADIANT FLOOR HEATING SYSTEM
The radiant floor heating system shall be installed in accordance with
HYI-400, unless otherwise indicated by the tubing manufacturer's
installation instructions. During the installation, all tubing shall be
plugged on each end to prevent foreign materials from entering the tubing.
All tubing shall be checked for abrasions prior to installation. Tubing
with excessive abrasions that damage the oxygen barrier coating will not be
acceptable. Tubing with any abrasion that is greater than 10 percent of
the minimum wall thickness will not be acceptable. All tubing embedded or
concealed by the floor shall be installed without joints. The bending
radius of the tubing shall not exceed the values recommended by the tubing
manufacturer. The tubing shall be installed in such a manner as to evenly
distribute the heat across the floor. Tubing shall not be placed near heat
sensitive materials such as water closet seals. Isolation valves shall be
installed on each side of each tubing manifold. The manifold and fittings
shall be accessible for maintenance. After the system is filled with water
SECTION 15569A
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