3M ScaleGard HP, Installation And Operation Instructions Manual

11

Blending Valve Adjustment Instructions:

IMPORTANT NOTES:

• Typical TDS (Total Dissolved Solids) values for coffee are 80-200 ppm (parts per million) and occasionally lower for espresso, depending 

upon taste preference. Typical TDS valves for steam and combi ovens are less than 50ppm.

•

The blending valve should be set at start-up and checked periodically, for example when changing filter cartridges. The valve is a 

precision metering valve, that may be locked by tightening lock nut. 

•

To set blending valve use TDS monitor set in the "out" position.

1.  Open shut off valve in blending line. 

2.  Allow unit to run and fi ll tank for 5 min. 

3.  To adjust blending, rotate the blending valve to the left (counterclockwise) to increase the product water TDS and to the right (clockwise) to 

decrease the product water TDS (See Figure 5 item #2 below). The valve should be opened intermittently a quarter turn at a time.  Check the 
TDS after each incremental adjustment and again two (2) minutes after the desired TDS value is reached.  Re-adjust and check, as needed. 
(See Figure 5-item #2 below)  

4.  Lock the blending valve using the lock nut.

5.  After TDS is set, drain RO tank. System is now ready for use.

IMPORTANT NOTE: 

The TDS Monitor is push-button operated and requires two (2) 357A batteries. (Included in TDS meter)

Membrane Flushing Instructions:

1.   Open pressure tank sample valve and empty tank to drain.

2.  Flush system for at least 24 hours.

3.  Close tank sample valve

Storage Tank and RO System Sanitizing Instructions:

Sanitizing the storage tank requires:

•  Common household bleach (5.25% non-scented) or sanitizing agent

•  Eye dropper or plastic oral syringe

a.)  Disconnect the 1/2” line from marked”Tank Outlet”  to pressure tank.

b.)  Insert 15ml (0.5 ounces) of bleach or sanitizing agent into 1/2” line to pressure tank.

c.)  Reconnect the 1/2” line to pressure tank.

d.)  Turn ON the feedwater supply by plugging system into electrical outlet.

e.)  Wait 4-5 hours.

f.)  Open pressure tank sample valve and empty tank to drain.

g.)  Sanitizing is now complete.

h)  If there is any residual chlorine/bleach taste in the next tank full, drain tank completely a second time.

2

1

Reset 

Button

Figure 5