FEBCO 856ST MasterSeries In-Line Design Double Check Detector Assemblies - Manual (Page 2)

2
ENGLISH INSTRUCTIONS
Installation Instructions
1. Consult local codes for specific installa-
tion requirements and restrictions appli-
cable to your area. It is recommended
that system supply pressure be at least
20psi (133kPa).
2. These instructions apply to Series 850,
LF850 (DC), 856, LF856 and 856ST
(DCDA), sizes 2 1 ⁄
2
" to 10" only (65 –
250mm). The valves may be installed
only in the orientation/flow direction as
shown. The gate valves may be rotated
as permitted by the flange bolt pattern
on vertical installations only.
3. The valve assembly must be installed
where it is accessible for periodic
testing and maintenance. Clearances
shown in the installation views apply
to exterior, interior and pit/vault instal-
lations and are only recommendations.
These minimums do not apply to
removable protective enclosures. Refer
to local codes for actual requirements in
your area.
4. PRIOR TO INSTALLING THE VALVE
INTO THE LINE, FLUSH THE SUPPLY
LINE OF ALL FOREIGN MATERIAL.
Failure to flush the supply line may
cause the check valves to become
fouled and require disassembly and
cleaning.
5. Lift the assembly by connecting lift
hooks to the lift rings cast into
the valve body. DO NOT LIFT THE
ASSEMBLY BY CONNECTING TO
THE GATE VALVE HANDWHEELS OR
STEMS.
6. After installation SLOWLY fill the
assembly with water and bleed air
from the body using the # 3 and # 4
test cocks. Test the valve assembly to
ensure correct operation.
NOTICE
All assemblies are tested at the factory for
proper operation and leakage. If the valve
does not pass the field test, it is most like-
ly due to a fouled check valve. This is not
covered by the factory warranty. The valve
cover(s) must be removed and the check
seats inspected and cleaned. Any damage
or improper operation caused by pipeline
debris or improper installation/start-up is
not included in the factory warranty.
In case of a possible warranty claim,
contact your local supplier or FEBCO
Representative. DO NOT REMOVE THE
VALVE ASSEMBLY FROM THE PIPELINE.
7. The assembly must be protected
from freezing and excessive pressure
increases. Thermal expansion or water
hammer can cause pressure increases.
These excessive pressure situations
must be eliminated to protect the valve
and system from possible damage.
Local building or plumbing codes may require modifications to the information provided.
You are required to consult the local building and plumbing codes prior to installation. If
this information is not consistent with local building or plumbing codes, the local codes
should be followed.
Need for Periodic Inspection/Maintenance: This product must be tested periodically in
compliance with local codes, but at least once per year or more as service conditions war-
rant. Corrosive water conditions, and/or unauthorized adjustments or repair could render
the product ineffective for the service intended. Regular checking and cleaning of the
product’s internal components helps assure maximum life and proper product function.
WARNING !
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information can
result in death, serious personal injury, property damage, or
damage to the equipment.
Keep this Manual for future reference.