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After filtration, two chlorine injector pumps deliver chlorine to the water line before it leaves the building.
Pulsatron Series E
Model # LE03SA-VTC1-xxx
An instruction manual for these injectors can be found here.
Adjustments to the injectors should only be made if residual chlorine readings indicate it is necessary. Our experience has shown that to maintain a free chlorine level of around 0.2 ppm at the lower end of the subdivision, a level of 0.5 or 0.6 ppm is necessary at the reservoir.
The exact amount of chlorine needed will be determined by free chlorine readings taken elsewhere in the system. Free chlorine at the end of the system should be a minimum of 0.2 ppm (mg/L) and a maximum of 0.5 ppm. Injectors will be adjusted accordingly. Changes should be made slowly, otherwise you can overshoot and end up chasing the concentration up and down.
Rebuild kits are available for these injectors. The most common is the KOPkit # K3CTC1. These are about $200 (2010 price) but include some parts we don't really need, so ordering the main diaphragm alone is recommended.
On the left are an old and new diaphragm from one of the injectors. The left-most is an old diaphragm and it's easy to compare the difference between the old one and the new diaphragm to its right. This is one part available in the rebuild kit or by itself.
The diaphragms for the injectors can be ordered individually. They are about $41 each (December 2012 price).
For parts, contact: Visser Sales - 1-800-367-4180 (Ontario location) or the Langley BC location (604-523-1798).
A NEW source (as of January 2023) is Pumps & Parts Online (https://www.pumpsandpartsonline.com/). We have an account with them (see Society's computer for login credentials).
January 25. 2023 - ordered J41996 - Injection Valve Assembly for VTC1. Cost = US$72 free shipping to US destinations. Shipping to Northport where it can be picked up with a quick trip from Trail.
Cleaning Notes:
Any time an injector is dismantled to replace the diaphragm, the diaphragm housing and the valve assembly above the diaphragm housing need to be cleaned. A reaction between the bleach and the diluting water in the tank produces a thick deposit that can plug up the passageways in the pump over time. It seems that the deposit is a calcium oxalate compound. It can be removed by brushing, scraping and treating with a scale-removing solution such as a rust, calcium and lime cleaner (eg: CLR).
Note also that there are two injection ports into the main water line post-filtration, connected to the injectors by plastic tubing. These injector ports get clogged with this deposit as well and need to be cleaned. At present, we don't have a frequency schedule for cleaning these parts. It is suggested that they be taken apart and cleaned once every year or so, perhaps when an injector's diaphragm is replaced. Time will tell how often these need to be cleaned. As of January 2023, we do not have any of these as spares. One spare has been ordered on Jan 25, 2023.
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