Shurflo 4901-0201 Installation Manual

SMART SENSOR™ 4.0 Installation & Operation Manual

IMPORTANT

READ INSTRUCTIONS ENTIRELY BEFORE INSTALLING THE SMART SENSOR 4.0

Congratulations! You have purchased the finest potable water pump in the industry. The Smart
Sensor 4.0 has been designed and engineered to provide you with “just like home” water flow.

MOUNTING

- Mount pump within 6 feet of tank for best performance.

- Mount pump for easy access if maintenance is required.

- Mount pump in a space of two cubic foot unless adequate ventilation is provided.
The pump may be mounted in any position.

- Choose a solid surface that will not amplify pump vibration. Heat sink must be free and have
air flowing across.

- The mounting feet are intended to isolate the pump from the mounting surface; over

tightening, or use of oversized screws will reduce ability to isolate vibration/noise.

ELECTRICAL

• The pump should be on a dedicated (individual) circuit protected by the specified fuse

indicated on the motor label.

• A U/L approved marine duty switch (ignition protected) rated for 15 amps or higher is

recommended, and must interrupt current flow on the positive (+ red) lead.

• Pump draws 15 milliamps when pump switch is on, even when pump is not running.

WARNING: 12V PUMPS

Test incoming power with a multimeter to check voltage polarity (red = +). Red pump wire
MUST be connected to positive power or permanent damage to controller will result!!! Failures
of these type are not covered under product warranty.

TYPICAL INSTALLATION

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PLUMBING
Reducing unnecessary restrictions to the inlet and the outlet tubing will allow the pump

to run freely, maximizing the Smart Sensor’s performance, quietness and eliminate the
possibility of cavitations (starving the pump).

• Installation of a 50 mesh strainer, such as SHURflo model 255 is recommended to prevent

debris from entering the pump.

• SHURflo recommends at least 1ft. [.3 M] of ½" [13mm] I.D. flexible high pressure tubing to

both ports. Ideally, the pumps ports and strainer should not be connected to plastic or rigid
pipe. The pump's normal oscillation may transmit through rigid plumbing causing noise, and
possibly loosen or crack components.

• Pump may flow better with 3/4” line feeding the pump.

WINTERIZING
NOTE: When used per the manufacturers recommendations non-toxic antifreeze for

potable water is safe for use with SHURflo pumps. Make sure all components in the
system are compatible. Hot water heaters and filters must be drained and by-passed when
using potable water anti-freeze. Refer to the manufacturer and other equipment
manufacturers for their specific winterizing & drainage instructions.

WARNING

Do not use Automotive Antifreeze to winterize potable water systems. Such
solutions are highly toxic. Ingestion may cause serious injury or death. To
properly drain the system, perform the following:

1. Drain the water tank. If the tank doesn't have a drain valve, open all faucets and let

pump run until the tank is empty.

2. Open all the faucets (including the lowest valve or drain in the plumbing) and allow

the pump to purge the water from the plumbing system, and then turn the pump OFF.

3. Using a pan to catch the remaining water, remove the plumbing at the pump's

inlet/outlet ports. Turn the pump ON, allowing it to operate until the water is expelled.
Turn OFF power to the pump once the plumbing is emptied. Do not reconnect
pump plumbing. It is o.k. to lightly cover plumbing ends to prevent bugs from entering
the system.

Make a note at tank filler as a reminder: "Plumbing is Disconnected".

4. All faucets should be left open to guard against any damage.

5. Potable water anti-freeze may be poured into drains to protect p-traps and waste system from

freezing.

6. Fill system and sanitize before use in the spring.

SANITIZING

Sanitizing is recommended prior to storing and before using the water system after storage.
Systems with new components, or ones subjected to contamination, should also be disinfected
as follows:

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