Watts LFM127-3 Installation, Operation And Maintenance Manual Download Page 5

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Setting the Delayed Opening
Control

Adjust the tank draw-down Delayed Opening Control by turning
the adjustment screw IN, clockwise, to increase, or OUT, counter-
clockwise, to decrease opening delay (See Figure 5B) .

4 IOM-ACV-127-3_6127-3 2115

EDP# 1917067

IOM-ACV-127-3_6127-3 2115

EDP# 1917067

Counterclockwise to DECREASE

opening delay

Clockwise to INCREASE

opening delay

Figure 5

CP15 — Delayed Opening Control

Summary of Contents for LFM127-3

Page 1: ...2 Setting the Altitude Controls 3 Maintenance Schedule 6 Trouble Shooting Guide 6 Valve Disassembly Instructions 8 ACV Schematic 11 Local building or plumbing codes may require modifica tions to the information provided You are required to consult the local building and plumbing codes prior to installation If the information provided here is not consistent with local building or plumbing codes the...

Page 2: ... 3 Install isolation valves upstream and downstream of the main valve Note If using butterfly valves ensure valve disc does not contact the main valve 4 Provide adequate clearance for valve servicing and maintenance Refer to valve servicing dimensions on next page Avoid installing valves 6 and larger in the vertical position main valve stem horizontal Automatic Control Valves ACVs are designed for...

Page 3: ...pped air will need to be bled off the valve cover during startup The ACV includes a bleed valve use a flat head screwdriver to slowly open the valve See Figure 1 STEP 3 Pressure the line by opening the upstream isolation valve slowly Air is vented through the air bleed valve Tighten the fitting when liquid begins to vent See Figure 1 Repeat the process until no air is trapped in the system Globe A...

Page 4: ...level slightly below the tank over flow mark eliminat ing any wave action discharge from the over flow pipe Setting the Altitude Pilot STEP 4 Slowly open the downstream isolation valve STEP 5 If the valve remains closed as indicated by the stem position in the position indicator See Figure 2 and the tank level is known to be below the desired level SLOWLY turn the adjustment screw IN clockwise by ...

Page 5: ...urning the adjustment screw IN clockwise to increase or OUT counter clockwise to decrease opening delay See Figure 5B 5A 5B IOM ACV 127 3_6127 3 2115 EDP 1917067 2021 Watts 5 Counterclockwise to DECREASE opening delay Clockwise to INCREASE opening delay Figure 5 CP15 Delayed Opening Control ...

Page 6: ...e specification sheets for approximate cover capacity A continuous flow of water from the open port indicates a damaged diaphragm or loose disc diaphragm assembly Disassemble valve and replace diaphragm or tighten disc diaphragm assembly Test 2 Seat Seal Test 1 Close downstream isolation valve and install pressure gauges on an open inlet and outlet port of main valve 2 Open upstream isolation valv...

Page 7: ...21 2 turns open from full closed position Can be adjusted in field Main Valve will not close Closed isolation valves in pilot system Check isolation valves ensure open Diaphragm is damaged Conduct diaphragm seal test repair and replace if necessary Main valve stem assembly corroded damaged Inspect stem assembly clean replace if necessary Blockage in main valve Perform freedom of movement test if v...

Page 8: ... Remove cover nuts and washers 3 Remove the cover If cover is not free to be removed loosen it by tapping upward along its outside edge with a dull cold chisel pic tured above a Large valves may require the installation of lifting eye bolts in order to facilitate cover removal installation ports are provided on the cover for this purpose 4 Remove the Disc and Diaphragm Assembly from the valve body...

Page 9: ... brush or by using a Mineral Dissolving Solution Inspect parts for wear and replace if necessary 7 Inspect valve seat If seat is not damaged removal is not necessary Valve seats 6 and smaller are threaded into the body of the valve and require a seat removal tool Figure 6 Table 1 details the tool dimensions for seat removal Valve seats 8 and larger are held in the valve body with stainless steel c...

Page 10: ... Nuts in a crossing pattern to ensure even distribution Test the Disc and Diaphragm Assembly for smooth travel by following the Freedom of Movement Test procedure in previous section 11 Test the integrity of the Seat Seal by following the Seat Seal Test procedure in previous section 12 Return valve to service by following instructions on the Technical Bulletin matching the valve function Size in 1...

Page 11: ...l 9 Stem Washer ASTM A276 304 Stainless Steel 10 Diaphragm Washer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 11 Diaphragm Buna N Nitrile 12 Disc Retainer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 13 Seat Disc Buna N Nitrile 14 Spacer Washer x5 NY300 Fiber 15 Disc Guide ASTM A743 CF8M 316 Stainless Steel 16 Shaft ASTM A276 304 Stainless Steel 17 Seat Ring ASTM A743 CF8M 316 Stainless Steel 17A...

Page 12: ...ot be responsible for any incidental special or consequential damages including without limitation lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly other costs resulting from labor charges delays vandalism negligence fouling caused by foreign material damage from adverse water conditions chemical or any other circumstances ov...

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