3M ScaleGard HP, Installation And Operation Instructions Manual

9

Plumbing Connections 

  1.  Install feed water line to marked “Inlet” 1/2” NPT inlet connection.

  2.  Install RO water line from marked “Tank Outlet” to pressure tank (Sold Separately). Assemble and install pressure tank fi ttings per 
 

instructions provided with tank.

3.  Install RO water line from marked “Equipment Outlet” to the foodservice equipment.  Installation of a post fi lter is required downstream of the 

RO system (Required/Sold Separately).   

4.  Install drain line from marked “Drain Outlet” to the drain . An approved air gap must exist between the RO system reject drain line and the 

drain opening to comply with state and local plumbing codes.

5.  Install 1/2" Bypass line as shown on Figure 1-Plumbing Diagram (if required).

6.  Check air pressure on the pressure tank using the valve on the tank. With the tank empty, the pressure should read between 7-18  psi (48-124 

kPa). Adjust as required. 

7.   Plumbing connections for the ScaleGard

TM

 HP reverse osmosis system are now complete. 

Install cartridge per instructions below.  

Pre-Filter and Post Filter Cartridge (blue label) Installation:

1.  Remove red sanitary cap from new cartridge. Ensure o-rings are seated into their grooves and lubricate with water. Install with a quarter turn 

to the right until cartridge come to a complete stop. NOTE: Cartridges are keyed to fi t in proper location only.  

Figure 3 - Installation Instructions

Step 1: Remove the plug from the 1/4" fi tting at the bottom of the RO cartridge by pushing in the collet and pulling out the plug.

Step 2: Remove the Twin fl ow control assembly from the packaging.

Step 3: Firmly push the short tubing on one end of the twin fl ow control into the John Guest 1/4” NPT fi tting at bottom of the RO cartridge.

Step 4: Push the reject tubing into the fi tting in the twin fl ow control assembly.

Step 5: Operating pressure will need to be reset (See Operating Pressure Adjustment instructions on page 14).

 HFRO 33% Recovery Kit

 HFRO 50% Recovery

(Use only if recommended by installer)