3M STM150, TSR150 owner manual Drain Connection, Automatic Bypass Valve, Storage Tank Installation

The water pressure in the tank will increase as the tank fills with water. When the pressure in the tank reaches approxi- mately 80 psi (552 kPa) the filter system shuts off. When water is drawn from the tank and the pressure drops to approximately 60 psi (414 kPa), the filter system will automatical- ly turn on.

If the tank pressure drops to 40 psi (276 kPa) the auto-bypass solenoid valve will open allowing unfiltered water to flow to service until tank pressure reaches approximately 60 psi (414 kPa). When the filter sys- tem is in auto-bypass the red light on the front of the bracket will come on.

NOTE: TSR150-2/2A/2B Bypass at 20psi (138 kPa) to 40 psi (276 kPa).

IMPORTANT!

The use of metallic piping materials for high quality water is not recommend- ed because the water is aggressive due to low TDS and pH. Plastic tubing and pipe are most suitable. Solvent bonded plastic pipe should be assembled care- fully to avoid excessive glue inside the pipe. Piping of any type should be flushed thoroughly before use. Be sure piping conforms to local plumbing codes.

Drain Connection

Important: An approved air gap should exist between the filter system drain lines and the drain opening to meet local plumbing codes.

1.Run a minimum 3/8” O.D. tube from the reject port to the drain.

2.The 3/8” O.D. reject tubing line may be run up to 10 ft (3 m) from the filter system to the drain. Care must be taken not to crimp or block the reject tubing line.

Automatic Bypass Valve

The auto-bypass valve has 3/8” MNPT inlet and outlet ports and a 6’ (183 cm) power cord that plugs into the filter system. This auto-bypass valve should be installed between the incoming unfiltered water line to the filter system and the water line to service after check valve. (Refer to page 4.)

Storage Tank Installation

Note: Storage tanks are purchased separately. Consult the CUNO® Foodservice Price List for applicable sizes and part numbers.

1.Follow installation instructions provided with tank.

2.Check the air pressure in the tank at the valve in the top of the tank. With the tank empty, the pressure should be 20 psi (137.9 kPa). Adjust the air pressure as required.

3.Place the tank in the desired location. It should be placed in an area where it will not be bumped or jarred.

4.Connect fitting and minimum 3/8” O.D. tubing to product port of the unit.

5.Run tubing from the other side of the TEE to the check valve and on to point of use connection and bypass line. Refer to Installation Schematic on page 4.

6.Open the ball valve on the tank by turning the handle until it is parallel with the body of the valve.

Storage Tank	Diameter	Height	Pipe Connection
2.5 gal. (9.5 lit.)	9 1/16" (23 cm)	14 1/8" (35.9 cm)	1/4" (0.6 cm)
5 gal. (19 lit.)	15 3/8" (39.1 cm)	17 3/8" (44.1 cm)	3/4" (1.9 cm)
10 gal. (38 lit.)	16" (40.6 cm)	32 1/2" (82.6 cm)	1" (2.5 cm)
20 gal. (76 lit.)	16" (40.6 cm)	57 1/2" (146.1 cm)	1" (2.5 cm)
40 gal. (151 lit.)	24" (61 cm)	56 1/2" (143.5 cm)	1 1/4" (3.2 cm)
Point-of-Use Connections

Distance from Storage	Recommended Minimum	Recommended Minimum
Tank to Point of Use	Tubing Size	Plastic Pipe Size
up to 5 ft (0-1.5 m)	1/2" O.D. (1.3 cm)	3/8" (1 cm) Schedule 40 PVC
5-20 ft (1.5-6.1 m)	3/4" O.D. (1.9 cm)	1/2" (1.3 cm) Schedule 40 PVC
20-40 ft. (6.1-12.2 m)	N/R	1/2" (1.3 cm) Schedule 40 PVC
40-60 ft. (12.2-18.3 m)	N/R	3/4" (1.9 cm) Schedule 40 PVC

Note: The above table is appropriate for point of use applications that require flow rates up to 5 gpm (18.9 lpm).

Select the tubing or pipe size that will help provide adequate flow and pressure to the point of use (i.e. Longer runs require larger tubing).

The type of tubing or pipe used must conform to local plumbing codes. Tubing or pipe used for drinking water applications must be NSF listed or made of FDA compliant materials.

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