Hydrotech 9500 Commercial TMI Water Softener - Manual (Page 9)

Page 9
Time Brine Refill and Meter Setting Procedure
2. The control valve has a separate brine tank fill cycle.
— Calculate the desired salt setting using the brine line flow control rate of refill (in gpm) multiplied by the
timer setting. Then, using one gallon of fresh water dissolving approximately 3 lbs salt, calculate the
refill time.
. Example:
A desired 30 lbs salt setting:
The unit has a 1.0 gpm refill rate so a 10 gallon fill is required.
10 gallons x 3 lbs/gals = 30 lbs salt
Set the timer refill section at 10 minutes.
10 minutes x 1.0 gpm = 10 gallon fill
. NOTE:
There must always be two pins at the end of a refill time to stop the fill cycle. With the Regeneration
times set, place timer back to its original position, making sure the lower right hand corner snaps back into the
backplate and the meter cable slides through the backplate and does not bind.
3. Setting the gallon wheel.
Knowing the amount of resin in each tank and the salt setting per Regeneration, calculate the gallons available,
using the following capacities as a guide:
(capacity per ft3 x ft3 of resin per tank) = gallons available
compensated hardness of H2O
NOTE:
Based on tank size:
More resin increases capacity, less resin decreases capacity.
More salt increases capacity, less salt decreases capacity.
Example:
Tank Diameter = 16”
Compensated Hardness = 35 grains per gallon (tested sample)
ft
3
Resin (based on flow rate) = 4
lbs of Salt = 8
Capacity per ft
3 .
= 24,000
(24,000 x 4 ft 3 of resin per tank) = 2,740 gallons available before regeneration
35 grains
DO NOT SET THIS FIGURE - GO TO STEP 4
— Because the control valve regenerates with soft water from the other tank, subtract the water used for
regeneration. Take each regeneration cycle and calculate the water used.
Example:
Unit is set for a 16” diameter tank with 4 ft3 of resin and salted at 8 lbs. per ft3, 7 gpm backwash,
#3 injector, 1.0 gpm brine refill, and 60 psi and timer set for 10 min. backwash, 60 min. brine and rinse,
10 min. rapid rinse, 10 min. brine tank fill.
Backwash 10 minutes x 7.0 gpm = 70.0 gallons
Brine and Rinse 60 minutes x 1.0 gpm = 60.0 gallons
Rapid Rinse 10 minutes x 7.0 gpm = 70.0 gallons
Brine Tank Fill 10 minutes x 1.0 gpm = 10.0 gallons
Total Regeneration Water = 210.0 gallons
With the 2740 gallons available calculated in Step 3, subtract the Regeneration water used from the total
water available.
2740 gallons available - 210 gallons used = 2530 gallons
(in Regeneration, Step 4)