STA-RITE System 2 PLD50 Installation, Operation & Parts page 7

Figure 5 – Insert ring tab in slot in
filter body.
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Figure 6 – Roll ring to one side to
loosen upper tank half.
Small
Catch
Figure 7 – Safety Latch
Disassembly:
1. Stop the pump.
2. Close isolation valves to prevent flooding.
3. Open air release valve on top of filter tank to release all pressure from in-
side of tank.
NOTICE: Make sure that waste water disposal complies with local codes
and ordinances.
4. Remove drain plug and drain all water from tank.
5. Remove Posi-Lok™ ring as follows:
a. Press safety latch (below the ring) toward the tank to release it (see
Figure 4).
b. Hold latch in the release position and rotate ring COUNTERCLOCK-
WISE to remove. If ring is difficult to turn, tap gently with a rubber mal-
let to overcome initial resistance.
NOTICE: DO NOT use screwdriver or bladed instrument that may damage
shell surfaces to pry tank shells apart.
6. Separate upper and lower tank shell halves using tabs on bottom of
Posi-Lok™ ring. Insert tab into slot located at tank joint and twist ring to
pry shell halves apart. See Figures 5 and 6.
7. Remove O-ring from upper tank shell. Inspect for cuts, cracking, deforma-
tion or signs of wear; replace if necessary.
NOTICE: To avoid strain or damage, allow filter module to drain before
lifting it out of the tank.
SAFETY LATCH (See Figure 7)
The purpose of the safety latch is to hold the Posi-Lok™ ring in the locked
position. If the latch is damaged, replace it as follows:
1. Press down on the small catch behind the safety latch and press or tap the
latch out of the "Tee" slot in the tank (see Figure 7).
2. Snap the new latch into position.
NOTICE: DO NOT operate the filter if the safety latch is damaged or will
not hold the Posi-Lok™ ring in the locked position.
Assembly:
1. Inspect and clean the tank, ring threads and O-ring groove. Replace dam-
aged parts as necessary.
2. Install the filter by placing the port in the bottom of the filter cartridge over
the tank outlet port. Push down firmly to seal.
3. Ensure that the air bleed assembly on top of the module is clean and
properly mounted.
NOTICE: Lubricate O-ring only with the silicone grease provided or
equivalent, as other lubricants may cause the ring to swell. DO NOT lu-
bricate Posi-Lok™ ring or threads on lower tank shell as this may collect
grit and make removal difficult.
4. Install the O-ring in the upper tank shell O-ring groove. Be sure that the
O-ring is clean and not twisted.
5. Push the upper tank shell into the lower tank shell to compress the O-
ring.
6. Place the Posi-Lok™ ring squarely over the tank shell threads and rotate
COUNTERCLOCKWISE until the ring falls into the slots; then rotate
CLOCKWISE until securely latched.
7. Follow instructions in the "Initial Startup" section of this manual.
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