Culligan Aqua-Cleer Series Installation, Operation & Service Instructions With Part List page 29

Installing an RO to Service Other Water Using Appliances
Pressure, Pressure, Pressure
If you are installing a service line from an RO storage tank to an appliance
with a minimum pressure requirement then you may need to consider the
following options so as not to operate below the operating limits of that
appliance. This is important when the appliance has a shutoff that triggers
at low or high pressures. The shutoff low value can range from 20 psi all
the way up to 35 psi. In an RO storage tank the water pressure will drop
when it's being drained. This reduction in pressure can trigger that shutoff,
especially in households where house pressure measures around 40 psi.
Graphs 5, 6 and 7 illustrate this drop in pressure when a certain volume
of water is drained from a storage tank. To prevent this potential issue we
recommend three options. (Figures 18, 19, and 20)
Option 1 - Installation of a demand delivery pump (Figure 18)
This type of pump installs after the storage tank, but before the appliance.
The pump regulates the line pressure using variable speed technology. A
setting inside the electronics package of the pump keeps the line pressure at
a set value - usually 60 psi. This pump is more expensive than a standard
booster pump, but it offers adaptability to varying water pressure conditions.
This adaptability makes it ideal for these types of applications.
Option 2 - Installation of a booster pump (01-0093-34) (Figure 19)
Placing this pump before the RO will increases overall pressure to the
system. If you boost the water pressure from 40 to 80, then the full pressure
in the storage tank will be around 53 psi. Refer to graphs for the draw-down
pressures for the 2, 3 and 9 gallon storage tanks. These graphs will guide
your sizing decision when installing for this type of application. Increasing the
overall pressure in the system will allow more volume to be drawn from the
tank before the pressure dips below a shutoff value.
Installation of permeate pump (Figure 20)
You can also use the Culligan Permeate Pump (01-0161-83) to increase the
pressure inside the storage tank. Installing this non-electric pump in the RO
system will increase the pressure inside the tank up to 90% of the incoming
water pressure. For example at 80 psi house pressure a standard system
would pressurize the tank to 53 psi (80 x 0.67), with a permeate pump that
pressure would be closer to 72 psi. This is a low cost alternative that has the
potential to meet the application requirements.
Aqua-Cleer Faucet
Drain
Cold Water Supply
Tubing from Faucet
Airgap - 3/8" Tubing
Feedline 1/4" Tubing
Post Filter
1/4" Tubing to
Faucet Airgap
Delivery
Pump
Ball Valve
3/8" Tubing to
Faucet Product Port
Tank
To Bottom Of RO Cartridge
Figure 18
Aqua-Cleer Faucet
Drain
Cold Water Supply
Tubing from Faucet
Airgap - 3/8" Tubing
Feedline 1/4" Tubing
Post Filter
1/4" Tubing to
Faucet Airgap
Booster
Pump
3/8" Tubing to
Ball Valve
Faucet Product Port
Tank
To Bottom Of RO Cartridge
Figure 19
Aqua-Cleer Faucet
Drain
Cold Water Supply
Tubing from Faucet
Airgap - 3/8" Tubing
1/4" Tubing to
Faucet Airgap
Post Filter
3/8" Tubing to
Faucet Product Port
Permeate Pump
Ball Valve
Tank
To Bottom Of RO Cartridge
Figure 20
Performance & Technical Information
Aqua-Cleer Manifold
Aqua-Cleer Manifold
Feedline 1/4" Tubing
Aqua-Cleer Manifold
27