Millenium MRO-35, Operation Manual

13

  When the Faucet is first opened, expect air 

and carbon fines (very fine black powder) 

from the In–Line and Activated Carbon Post 

Filters to be rinsed out. This is normal for 

the first tank of water or after the Activated 

Carbon Post Filters are changed.

SECTION V.  OPERATION & MAINTENANCE

A.  Normal Operation 

1.  It is normal for the Total Dissolved Solids 

(TDS) of the water to be higher than normal 

during the first 5 gallons of operation; this is 

due to the sanitizing solution and the new 

Post Filters. After this water is rinsed to drain, 

the removal rate should stabilize at a value of 

greater than 75%. The optional Water Quality 

Monitor was designed to measure water 

quality when the R.O. system is making 

water.  In order to assure you are getting an 

accurate reading, empty the holding tank, 

wait 15 minutes until the system begins 

making water, and then test the TDS with the 

monitor.

2.  R.O. systems produce drinking water at 

relatively slow rates; it can take up to 5 hours 

or more to fill the Holding Tank. Normal 

operation is to let the Holding Tank fill with 

water and then draw water as is needed. 

When the pressure in the Holding Tank falls 

to a given pressure (as the water is being 

used) the Automatic Shut–Off Valve (ASO 

Valve) will start water production and the 

system will refill the Holding Tank. When the 

Holding Tank is full and no water is being 

used, the ASO Valve will automatically shut 

off the feed water to conserve water. The 

more water that is used (up to the capacity 

of the system) the better the R.O. system 

will function. Other uses for the water are 

flowers, pets and rinsing glassware. 

  With each use it is recommended that you 

run the faucet for at least 10 seconds prior to 

using water. This is especially important if the 

system has not been used daily. After periods 

of non–use, such as a week of vacation, 

it is better to empty the Holding Tank and 

allow the system to produce fresh water for 

use. If the system is not used for 3–4 weeks 

or longer, it is a good idea to resanitize the 

system and to change the prefilter and post 

filters.

B.  Changing Filters 

  THIS R.O. SYSTEM CONTAINS FILTERS 

WHICH MUST BE REPLACED AT REGULAR 

INTERVALS TO MAINTAIN PROPER 

PERFORMANCE. USE ONLY FACTORY 

APPROVED FILTERS. 

All individuals should take adequate 

precautions when changing the filters, 

including wearing protective gloves, to avoid 

direct contact with the exhausted filters.

  The recommended interval for changing the 

filters (not the R.O. Membrane) is every six 

(6) months. Typical T.F.C. Membrane life 

expectancy is three years. Local conditions may 

dictate more frequent changes. 

NOTE:

 If the R.O. Membrane is to be replaced, 

see Sec. IV, F.1–3, for the proper procedure. 

  Use a drip pan to catch any water that may spill 

when the Filter Housings are removed. Refer to 

Fig. 1, for component location. 
1.  Close the Feed Water Saddle Valve by 

turning fully clockwise and open the 

Dispensing Faucet. Allow the Holding Tank to 

empty. 

2.  Loosen and remove the Sediment/Carbon 

Prefilter and the Activated Carbon Post Filter 

Housings. Discard the filters. 

3.  Wash the inside of the Housings using a 

mild detergent and a soft cloth. Do not use 

abrasive cleaners or pads. Thoroughly 

rinse all soap from the Housings before 

reassembly. 

4.  To sanitize the system and replace the filters: 

NOTE:

 The system should be sanitized 

before installing the Sediment/Carbon 

Prefilter and Activated Carbon Post Filter. 
•Use a good quality unscented 5¼% liquid 

chlorine household bleach. 

•Add one capful of bleach (this is 2 tsp. or 

10 ml) to the Sediment/Carbon Prefilter 

Housing and temporarily install the Housing 

without the Sediment/Carbon Prefilter. 

Check the Housing O–ring for proper 

position in its groove, engage and firmly 

tighten the Housing hand tight only.