Xylem JABSCO 18810-0000 Manual

PRESSURE AC CU MU LA TOR TANK
FEATURES
• Smooth flow from faucets
• Reduces pump cycling
• Precharged air cushion
• Eliminates pulsations and water hammer
• Diaphragm between water and air
• Polypropylene water reservoir
• Includes mounting brackets with mounting assembly
• IAPMO listed
• NSF Certified-Standard 61
SPECIFICATIONS
Port:
Dimensions:
Air Valve:
Precharge
Pressure:
Maximum Working
Pressure:
Volume:
Working Water
Volume:
Shipping Weight:
INSTALLATION
Mount pressure accumulator on bulkhead near water
pressure system pump. Tank may be mounted vertically or
horizontally, whichever is most con ve nient. Plumb to 3/4"
NPT port with minimum 1/2" pressure line. (If tank is very
close to pump, 3/8" plumbing may be used.)
PRECHARGE PRESSURE
Precharge pressure must match pump cut-in pres sure, the
pressure at which the pump restarts. The tank is
precharged from the factory at 20 psi (1.4 bar) which is the
most common cut-in pressure. If your pump specification
states cut-in pressure between 17 and 20 psi (1.2 and 1.4
bar), no ad just ment is necessary. If your pump cut-in
pressure is above or below this range, shut pump off, open
a faucet to relieve system pressure and adjust precharge
pressure using ordinary tire gauge and tire pump at valve
in top of tank. Pressure should be checked from time to
time and adjusted if necessary.
DO NOT PRESSURIZE TANK ABOVE 75 PSI.
3/4" NPT
8"x12-3/4"
Standard Tire Valve
20 psi (1.4 bar)
75 psi (5.2 bar)
2.0 Gallons (7-1/2 L)
0.9 Gallon (3-1/2 L)
5.5 lb (2,5 kg)
RELIEF VALVE RECOMMENDED
When used in a system with a pump that can pump in
excess of 100 psi, it is recommended that a relief valve
with a setting of 75 psi be installed. Often a relief valve
is already installed at the water heater. Check its setting.
HOW THE PRESSURE ACCUMULATOR
WORKS
PRE-PRESSURIZED
AIR CUSHION
DIAPHRAGM
2 0 P I S G
0 2 - 0 4 0 7 - 5
A.
A. Factory installed precharged air cushion.
B. When pump starts, water enters the reservoir. At
maximum pressure, system is filled. Pump shuts off.
C. When water is demanded, pressure in the air
chamber forces water into the system. Pump stays
off until minimum pressure is reached. Then pump
turns on.
MODEL 18810-0000
STEEL SHELL AIR VALVE
40-75
PSIG
3 0
non-
3 0
metallic
LINER
B.
P I S G
C.