Servicing Main Valve

WARNING

IF THE VALVE SNAP RING IS DIFFICULT TO REMOVE, RESIDUAL WATER PRESSURE MAY BE REMAINING IN THE SYSTEM. TO PREVENT POSSIBLE SERIOUS INJURY DUE TO VALVE BEING EJECTED UPWARD UNDER PRESSURE, CONFIRM THE FOLLOWING CONDITIONS EXIST PRIOR TO REMOVING THE SNAP RING AND VALVE:

A.WATER SUPPLY TO SPRINKLER IS SHUT OFF AT SOURCE.

B.All PRESSURE IS BLED FROM SYSTEM, INCLUDING CONTROL TUBES.

C.AC POWER IS DISCONNECTED AT SOURCE.

1.See Warning above. To remove valve assembly, squeeze snap ring ears together with snap ring pliers (P/N 995-100) and remove snap ring from sprinkler body. See Figure 8

2.Use valve removal tool P/N 995-08 for 860S or 995-09 for 880S to remove valve assembly from base of sprinkler body. Valve removal tool is inserted into sprinkler body and pushed through valve ribs. A slight twist will catch tool under ribs enabling valve removal by pulling straight up and out. See Figure 9.

Note: If valve removal tool is not available, use snap ring pliers to grasp rib of valve cylinder assembly and pull up and out of sprinkler body.

3.Reinstall valve assembly using valve insertion tool P/N 995-76 for 860S or 995-101 for 880S as follows:

•Load snap ring onto insertion tool carrier with stepped side against carrier as shown in Figure 10. While holding snap ring in compressed position, slide retainer clip in to hold snap ring ears

•Load valve assembly on carrier as shown.

Figure8

Figure 9

•Locate position of communication tube in bottom of sprinkler body and orient insertion tool accordingly.

•Insert tool straight down into sprinkler body aligning bosses on t-handle with holes on sprinkler body flange. When valve assembly clears vertical side wall ribs inside body, pull up on snap ring release mechanism (880 models only) and press valve assembly into position. Snap ring will lock into groove when properly installed. Remove insertion tool and check snap ring to confirm that it is fully seated in groove

Figure 10

Snap Ring In

Retainer Clip

Snap Ring Release

Mechanism

Stepped Side

of Snap Ring

Valve Assembly

Orientation In Carrier

Press Valve Assembly

Into Position

Snap Ring

Released