Watts TK-99E - Manual (Page 2)

Test Procedure for Spill Resistant Vacuum Breaker
Note: For both of the following tests the test kit must be held at the same level as assembly being tested.
A. Before starting test, all needle valves and bleed valves on test kit must be closed. B. Flush test cocks before test.
2
Test No. 1 - Air Inlet
Requirement: Air inlet must start to open when down stream
pressure is 1.0psi or above.
Step 1: Remove two screws on top of hood and remove hood.
Step 2: Install hose between test cock No. 2 and connection
“A” on high side (red) on test kit.
Step 3: Open test cock No. 2 and needle valve “A” high side
(red) on test kit.
Step 4: Open bleed valve “A” on top of test kit. Bleed air from
hose. Then close bleed valve “A” on top of test kit.
Step 5: Close shutoff valve No. 2 then shutoff valve No. 1.
Step 6: Slowly open needle valve “C” bypass (yellow) just as air
inlet opens. Record differential pressure.
Step 7: Close test cock No. 2 and remove hose.
Step 8: Close needle valve “C” bypass (yellow).
Step 9: Open shutoff valve No. 1.
Test No. 2 - Test Check Valve Pressure Drop
Requirement: Supply pressure drop must be 1.0psid or
above when water flow stops from test cock No. 2.
Step 10: Install hose between test cock No. 1 and connec-
tion “A” high side (red) on test kit.
Step 11: Open test cock No. 1 and bleed valve “A” on top of
test kit. Open bleed valve “A” on top of test kit and
bleed air from hose. Shutoff bleed valve “A” on top
of test kit.
Step 12: Close shutoff valve #1.
Step 13: Open test cock No. 2. When flow of water out of
test cock No. 2 stops, the differential reading is the
pressure drop record.
Step 14: Close test cock No. 1 and test cock No. 2.
Step 15: Replace hood and two screws on top of hood.
Open shutoff valves Nos. 1 then 2.
Test No. 1 - Differential Test
Requirement: Differential pressure across check must be 1.0
psid or above
Step 1: Remove two screws on top of hood then remove hood.
Step 2: Install hose between test cock and connection “A”
high side (red) of test kit.
Step 3: Open test cock then open bleed valve “A” on top of
test kit. Bleed air from hose then close bleed valve
“A” on top of test kit.
Step 4: Open needle valve “A” on high side (red) of test kit.
Step 5: Close shutoff valve No. 2 then shut off valve No. 1 on
test assembly.
Step 6: Slowly unscrew bleed screw on spill resistant vacuum
breaker body to relieve pressure down stream of
check (about 3 turns).
Step 7: When dripping from bleed screw stops and psid nee-
dle on gauge stabilizes, record the differential pressure.
NOTE: For both of the following tests the test kit must be held at the same level as assembly being tested.
A. Before starting test all needle valves and bleed valves must be closed. B. Flush test cock #2 and #1.
Test Procedure for Pressure Type Vacuum Breaker
Test No. 1 and 2
008QT shown
Bleed Valve B Bleed Valve A
Bleed Valve B
Bleed Valve A
Test Cock
No. 1
Test Cock No. 2
Bleed Valve B Bleed Valve A
Test Cock
No. 1
Test Cock No. 2
Test No. 1
800M4-QT shown
Test No. 2
800M4-QT shown
Test No. 2 - Air Inlet - Vent Opening
Requirement: Air inlet must start to open when supply pres-
sure is 1.0psi or above. Air inlet must be fully open when sup-
ply pressure is atmospheric.
Step 8: Slowly open needle valve “C” bypass (yellow) until
psid gauge reads 1.0psid then close needle valve “C”
bypass (yellow) holding pressure at 1.0psid.
Step 9: Visually inspect that the vent on top is slightly open,
about 1 ⁄
32
" or more, to pass test.
Step 10: Open needle valve “C” bypass (yellow) fully until
dripping from connection “C” stops.
Step 11: Visually inspect that the vent is fully open to pass
test.
Step 12: Replace hood and two screws on top of assembly.
Step 13: Restore valve to original working condition.
Note: After test, all valves on test kit must be fully open and
hose removed to prevent damage to test kit.