The PBS70 Water Pressure Booster System is a portable Unit which raises the potable water supply pressure
from it’s current input pressure to at least 65 PSI (4.5 BAR). The Unit is used in conjunction with typical post–
mix beverage dispensing equipment. The Unit controls activate a pump to begin charging a water accumulator
tank when the water tank pressure is 65 PSI (4.5 BAR) or less and turn off the pump when the pressure reaches 85 PSI (5.9 BAR).
MODEL NO./ OPTIONS
83914Water Pressure Booster With Integral Expansion Tank
83914003Water Pressure Booster With Remote Expansion Tank
ELECTRICAL REQUIREMENTS
WARNING: Risk of Electric Shock––This pump is supplied with a grounding–type
attachment plug. To reduce the risk of electric shock, be certain that the pump is
connected only to a properly grounded grounding–type receptacle.
The electrical power source must agree with that stamped on the motor nameplate. All electrical connections
must conform with National, State, and Local Electrical Codes.
WATER SUPPLY AND CONNECTIONS
Connect pump inlet to a potable water supply of ample capacity. Water pipe connections and fixtures directly
connected to a potable water supply shall be sized, installed, and maintained according to Federal, State, and
Local Laws.
The water supply line size should be equal to 3/8–inch (0.95 cm) pipe or larger, depending upon the water line
length.
Install a shut–off valve and a union in the water supply line. Before connecting the water supply line to the
pump, flush the water line thoroughly to remove all scale, rust, etc.
NOTE: A wire mesh strainer is provided on the pump inlet connection as a protection against large particles of rust, scale, etc; which may be loosened in the water supply line at the time of installation. This
strainer will not prevent fine particles of matter from damaging the pump; therefore, a good water filter
is recommended in any installation and absolutely essential when the water supply line contains solids. It is important that the water circuit be entirely free of joint compound or oil of any kind.
An electrical pressure switch regulates water pressure between 65 PSI (4.5 BAR) and 85 PSI (5.9 BAR). The
settings are factory set.
The connection from the Pressure Booster System to the beverage dispenser must be made with approved
plastic beverage tubing or stainless steel. This line should be of uniform size and be free from restrictions to
maintain maximum pressure. Recommended tubing sizes are 1/4–inch (0.64 cm) up to 10–feet (3.05 m) and
3/8–inch (0.95 cm) for large or longer runs. Sufficient excess line must be provided for Unit to be moved for
cleaning.
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The Water Pressure Booster System model 83914003 is connected to a remote NSF certified expansion tank
with approved 3/8–inch (0.95 cm) plastic beverage tubing.
STARTUP
1. With the booster system empty, check the air pressure on the accumulator tank using a high quality tire
gage or other suitable pressure gage. The tank pressure should be 19–21 PSI (1.3–1.4 BAR) using a pre–
charged air tank or an air compressor.
2. Turn on the water supply.
3. Energize the electrical supply. The pump should start and fill the accumulator tank with water. The pump
will stop automatically when the water pressure reaches 85 PSI (5.9 BAR).
4. Open a beverage valve and hold it open until the air is removed from the line and a steady stream of water
flows from the valve. Repeat this procedure for each valve.
5. Close all the valves and allow the pump to charge the accumulator tank.
6. Cycle the pump several times by repeating steps 4 and 5.
IMPORTANT: An insufficient water supply will cause noisy operation and eventual damage to the
pump. If the strainer and filter are clear and the line valves are fully open, a noisy pump operation
indicates an insufficient water supply.
WARNING: If the installation is idle and exposed to freezing temperatures, disconnect the
water supply and blow out all water from the pump and the accumulator tank.
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TROUBLESHOOTING GUIDE
TroubleProbable CauseRemedy
PUMP MOTOR WILL NOT
OPERATE
PUMP MOTOR WILL NOT
STOP
A.Locked pump rotor–Dirt or
pipe compound in pump; pump
seized.
B.No power.B.Check electrical power source for
A.Pump water supply restricted.A.Check water filter and pump inlet
B.Pump discharge line restricted.B.Water inlet check valve may be
C.Inefficient or worn pump.C.To test for efficiency, disconnect
A.Remove and check for free
rotation or replace.
loose connection.
strainer and clean. NOTE: Noisy
pump operation usually
indicates restricted water
supply. Also check for faulty
double check valve, water leak,
or low pump bypass.
plugged. Remove, clean, or
replace rubber O–rings.
discharge line from pump.
Connect a 300 pound (20.7 BAR)
gage and hand shut off valve to
pump discharge. Start pump.
Bleed off any air, close hand
valve, then observe pressure. It is
approximately 180 PSI (12.4
BAR), pump is O.K. If is
significantly below 180 PSI (12.4
BAR), it may be increased by
adjusting the pump by–pass.
Increasing the by–pass is
accomplished by removing
sealing acorn cap and turning the
adjusting screw in. If pressure
rises to 180 PSI (12.4 BAR),
pump is o.k. If it is still 150 PSI
(10.3 BAR), and the screw is
turned all the way in, the pump is
worn. Replace.
NOTE: A badly worn pump
and/or premature failure
usually indicates foreign
material in the supply water.
Install a water filter in supply
line.
Also check for faulty liquid level
control, corroded electrode or
broken pump shaft.
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TroubleRemedyProbable Cause
PUMP MOTOR WILL NOT
STOP (CONT’D)
D.OverdrawingD.Pump capacity is approximately
100 GPH (378 LPH). The
combined rate of flow from
dispensing valves should not
exceed this amount or pump will
run continuously.
NOISY PUMPA.Pump water supply restricted.A.Check water filter and pump inlet
strainer and clean. NOTE: Noisy
pump operation usually
indicates restricted water
supply. Also check for faulty
double check valve, water leak,
or low pump bypass.
VALVE DELIVERS WATER
INTERMITTENTLY
A.Pump water supply restricted.A.Check water filter and pump inlet
strainer and clean.
B.Inefficient or worn pump.B.See “PUMP MOTOR WILL NOT
STOP”.
DRINK HAS OFF–TASTE OR
ODOR (WATER
CONTAMINATION)
A.Too much plumbers pipe
compound on pipe joints.
B.Water coils or connecting lines
made of brass or copper.
A.Remove pipe compound and
clean joints. Use teflon pipe
thread tape.
B.Some water may react with brass
or copper. Replace lines with
stainless steel or plastic. Replace
coils or tanks with stainless steel.
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WARRANTY
IMI Cornelius Inc. warrants that all equipment and parts are free from defects in material and workmanship
under normal use and service. For a copy of the warranty applicable to your Cornelius, Remcor or Wilshire
product, in your country, please write, fax or telephone the IMI Cornelius office nearest you. Please provide the
equipment model number, serial number and the date of purchase.