Watts Governor 80M2 - Manual

Installation, Maintenance, & Repair
Series 709/LF709/709DCDA
Double Check Valve Assemblies
Double Check Detector Assemblies
Sizes: 3 ⁄
4
" – 10" (20-250mm)
RP/IS-709/709DCDA
8" (200mm) 709 OS&Y shown
Testing
For field testing procedure, reference IS-TK-DL, IS-TK-7,
IS-TK-9A, IS-TK-99E AND IS-TK-99D at www.watts.com
For other repair kits and service parts, reference PL-RP-BPD at
www.watts.com
For technical assistance, contact your local Watts
representative.
NOTICE
For Australia and New Zealand, line strainers should be in-
stalled between the upstream shutoff valve and the inlet of the
backflow preventer.
Its important that this device be tested periodically in compli-
ance with local codes, but at least once per year or more as
service conditions warrant. If installed on a fire sprinkler sys-
tem, all mechanical checks, such as alarm checks and back-
flow preventers, should be flow tested and inspected internally
in accordance with NFPA 13 and NFPA 25.
Installation Instructions
Watts Series 709 and LF709 Double Check Valve may be installed
in either a vertical or horizontal position.
Install valve inline with arrow on valve body pointing in the direction
of flow.
They should always be installed in an accessible location to facili-
tate testing and servicing.
Pipe lines should be thoroughly flushed to remove foreign material
before installing the unit. A strainer should be installed as shown,
ahead of backflow preventers to prevent discs from unnecessary
fouling.
CAUTION !
Do not install with strainer when backflow preventer is used on
seldom-used water lines which are called upon during emergen-
cies, such as fire sprinkler lines, etc.
It is important that Series 709 and LF709 be tested periodically
in compliance with local codes, but at least once a year or more
often, depending upon system conditions. (Reference IS-TK-7 at
www.watts.com).
Clearance Required for Servicing
Size DimenSion
A
in. mm in. mm
2 1 ⁄
2
" – 3 65-80 10 250
4 100 15 380
6 150 15 380
8 200 23 580
10 250 25 640
▼
▼
A
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 informa-
tion 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 warrant.
Corrosive water conditions, and/or unauthorized adjustments
or repair could render the product ineffective for the service in-
tended. 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.