Watts 007DCDA - Manual (Page 2)

Installation Instructions
Series 007DCDA
2
Annual inspection of all water system safety and valves is
required. Regular inspection, testing and cleaning assures
maximum life and proper product function.
The Series 007DCDA may be installed in either a horizontal or
vertical-up orientation for service on commercial potable water
or fire sprinkler systems. Supply pipe lines should be thoroughly
flushed to remove foreign material before installing the unit that
may cause unnecessary check fouling. The backflow assembly
must be installed with the arrow on the valve body pointing in the
direction of flow for proper operation.
It is recommended this device is installed downstream of a water
meter and/or main line insolation shutoff valves with installation
techniques that comply with the latest edition of the Uniform
Plumbing Code. Please consult Local Governing Code for proper
installation and agency code requirements.
CAUTION !
Strainer Installations
The installation of a strainer upstream of the Backflow Assembles
is recommend to prevent the check modules from unneces-
sary fouling when used on commercial potable water systems.
DO NOT install a strainer when the Backflow Preventer is called
upon for emergency deluge or used on a fire sprinkler system
and/or individual sprinkler feed.
CAUTION !
Fire Protection System Installations
The National Fire Protection Agency (NFPA) Guidelines require
a confirming flow test to be conducted whenever a “main line”
valve such as the shutoff valves or a backflow assembly have
been operated. A Certified Backflow Tester must conduct this
test. The trim valves located on the detector meter bypass line (if
equipped) should be fully closed during the confirming flow test
of the “main line” Backflow Assembly. Once complete, the trim
valves must be returned to a fully open position.
CAUTION !
Flange Connections
It is recommended to inspect and retighten all flange gasket
bolts on the Backflow Assembly during installation. Flange
gasket bolts may have loosened due to storage, transport and/or
static system hydro-testing.
Indoor Installations
For indoor installation, it is important the Backflow Assembly be
easily accessible to facilitate testing, “main line” valve servic-
ing and/or removal of the detector meter bypass line. DO NOT
install a Backflow Assembly in a concealed location.
Outdoor Installations
For outdoor installations, care must be taken to ensure the Back-
flow Assembly is not subjected to periods of freezing conditions.
Freezing conditions may damage the product and produce a
non-operational assembly. If the installation is subjected to freez-
ing conditions, the use of an insulated and/or heated enclosure
(WattsBox) may be required.
Below Ground Installations
The Series 007DCDA is not recommend for below ground (burial)
installations. The most satisfactory installation is above ground
and should be installed in this manner whenever possible. If
below ground installation is required, the use of a “valve box” to
shield the Backflow Assembly from contact with soil organics
and provide adequate drainage in the event of rain-fall is recom-
mended. Consult your Local Governing Code for proper below
ground installation and agency code requirements.
Parallel Installations
Two or more Series 007DCDA Backflow Assemblies may be
piped in parallel (where approved by Local Governing Code)
to serve a larger supply pipe main. This type of installation is
employed whenever it is vital to maintain a continuous supply
of water, where interruptions for testing and servicing would be
unacceptable. Parallel installations also provide an advantage
to increase capacity where needed beyond that provided by a
single Backflow Assembly and permits testing or servicing of an
individual assembly without shutting down the complete line. For
two valve installations, the total capacity should equal or exceed
the total requirement of the system.