Ion Technologies IT- DS05-S User Manual

IONTECH
®
IT-DS EDI Modules
NOTE: If you are unsure whether the module is scaled or organically fouled, clean first with
brine/caustic and then follow with the cleaning hydrochloric acid.
4.3.1 Cleaning with 2.0% Hydrochloric Acid (HCl)
Hydrochloric acid is a corrosive chemical. Wear safety glasses, gloves, and
protective clothing when using this or any corrosive chemicals.
Cleaning with Hydrochloric Acid involves three steps:
1. Hydrochloric acid treatment (2% HCl),
2. A salt flush (5% NaCl), and
3. Water flush.
STEP 1: Recirculating The HCl Solution
NOTE: The quantities in Table 4-2 represents the minimum amount of HCl required. It may be
necessary to use additional HCl to effectively clean a scaled Module. Monitor the pH of the
solution during the recirculation period. If the pH begins to rise, add more HCl to maintain a pH of appr
Circulating HCl through the system removes scale and metal oxides from the module.oximately 0.5.
Table 4-2 HCl preparation
Chemicals necessary
for Step 1 (2% HCl)
IT-DS05-S IT-DS10-S IT-DS20-S IT-DS30-S IT-DS50-S
Water (RO permeate or
CEDI prod)
6.5 gal
(25
liters)
13 gal
(50
liters)
20 gal
(75
liters)
33 gal
(125
liters)
49 gal
(185.5
liters)
36.5% Hydrochloric Acid
(HCl)
0.28 gal
(1.08
liters)
0.55 gal
(2.15
liters)
0.9 gal
(3.2
liters)
1.4 gal
(5.4
liters)
2.0 gal
(8.0
liters)
NOTE: The following cleaning procedures are based on the piping setup shown in Figure
4-1.
1.
2.
3.
4.
5.
6.
7.
8.
Prepare the IT-DS system for chemical cleaning. Follow the instructions in Section 4.2.4.
Make sure the tank drain valve is closed.
Fill the tank with the required amount of water.
Mix the required amount of 36.5% (concentrated) HCl with the water in the tank.
Additional HCl may be required during the recirculation period. Open the pump suction
and pump bypass valves completely. Start the cleaning pump.
When chemicals are well mixed, gradually open the pump discharge valve while
closing the pump bypass valve to adjust the product and reject flow rates to the
values given in Table 4-1.
a. Recirculate the solution through the module for at least 30 minutes.
b. Monitor the pH of the solution during the recirculation period. If the pH begins to
rise, add more HCl to maintain a pH of approximately 0.5. Turn
off the cleaning pump.
Check pH. Neutralize if necessary. Drain the tank.
STEP 2: Salt Flush To Drain
24 IT-DS MAN Rev 0

Ion Technologies IT- DS05-S Specifications

General

Brand	Ion Technologies
Model	IT- DS05-S
Category	Control Unit
Language	English