Maintenance - Pentair PSC-14-4-02 Installation And Operation Manual

MAINTENANCE

AIR CELL REPLACEMENT
Hazardous pressure. Read owner's manual before
attempting to install, operate, or service this tank. To avoid
possible equipment failure, severe injury, and property
damage, see "Rules for Safe Installation and Operation",
earlier in manual. Refer to air cell replacement instructions
included with the Air Cell Kit.
1. Disconnect the power to the pump.
2. To release the water pressure from the tank system, open a
faucet near the tank to drain the water.
3. Remove Pole Piece Cap w/ Valve Cap
4. Depress the valve stem to release the air pressure from the
air cell.
5. Remove the valve core to release the rest of the air pressure
(see Valve Core Replacement).
6. Remove the valve stem nut and washer. See Figure 7 for an
overall disassembly view.
Pole Piece Cap
w/ Valve Cap
Valve Core
Valve Stem Nut
Valve Stem Washer
Figure 7: Remove Pole Piece Cap w/ Valve Cap, Valve Stem Nut
and Washer
7. Disconnect the tank from the water supply line and carefully
lay it on its side (protect the sides of the tank). DO NOT DROP.
8. With a large pair of slip-joint pliers, unscrew the elbow
adapter from the tank.
9. Remove air cell by reaching into the tank bottom opening
and pulling it out the bottom port. The tether pin should
come out of the elbow adapter as you pull.
10. Lubricate the elbow adapter o-ring with o-ring lubricant.
11. Remove elbow adapter screen and push the tether pin
through from the top. From the bottom of the elbow adapter
screen, pull the head of the tether pin until the fins hook it
into place. Reinstall the elbow adapter screen on the elbow
adapter. See Figure 8.
12. Attach the nylon string kit to the air stem on the air cell.
CH21086 (08/01/21)
13. While squeezing the air cell, push the valve end of the air
cell into the bottom of the tank. Push it in as far as possible
without losing the bottom of the air cell in the tank.
14. Reinstall the elbow adapter, with new air cell in place, in the
bottom of the tank and tighten it against the o-ring to seal it.
15. Pull the valve stem up through the top polar opening, using
the nylon string kit.
16. Install the washer and valve stem nut on the valve stem.
Install the valve core.
17. Stand the tank back on its base and reconnect it to the
water supply line.
18. Recharge the tank to its proper air pressure (see "General
Safety", Page 2). Reinstall the Pole Piece Cap w/ Valve Cap.
19. Prime the pump (see the pump owner's manual) and restart
the system.
VALVE CORE REPLACEMENT
HAZARDOUS PRESSURE. To be sure air valve and
core cannot blow out of tank, release all air pressure from
Washer
tank before removing valve core.
1. Disconnect power to pump.
O-Ring
2. Drain ALL water in system by opening faucet closest to tank.
3. Depress valve core to release ALL air pressure in tank.
When air stops coming out of valve, remove core from inside
of valve to release remaining pressure. Thread new valve
core into tank valve and tighten.
NOTICE Do not overtighten.
4. Recharge tank with air pressure (see Figure 3) according
to Table 1. Install Pole Piece Cap w/ Valve Cap; reconnect
power to pump.
Tank is ready for use.
Figure 8: Push tether pin through from the top. Pull the head until
the fins hook in into place.
Air Cell Tether Pin
Screen
Elbow Adapter
6725 1212
7