How FloCon Saves Time
In April 2007 the BSRIA FloCon module study showed substantial time savings on flushing and commissioning the FloCon module system, compared to a typical rigid monolink system. The elements that contribute to time saved on flushing and commissioning, include:
- A 57% time saving when flushing a horizontal mains pipework in an office layout that incorporates commissioning modules.
- A 67% time saving when flushing fan coil unit circuits in an office layout that incorporates commissioning modules.
- A 56% time saving when balancing fan coil unit terminal circuits in an office that incorporates commissioning modules
The diagram below is a visual representation of the amount of work needed to flush, clean and commission a rigid monolink system:
The diagram below illustrates the time saved on flushing and commissioning the FloCon Module system:
Module Design – Flushing and venting
BSRIA Guide BG29/2011 Pre-commission Cleaning of Water
Systems recommends that all terminal units are provided with
flushing by-passes and localised flushing drains.
• Flushing by-passes are required so that the main distribution pipes can be
flushed and chemically cleaned without having to circulate dirty water and
chemicals through terminal units and control valves. Localised flushing
drains are required so that terminal units can be flushed with cleaned
water before they are connected to the main system.
Module Design – Commissioning
Commissioning is made easier and quicker by the introduction of valve modules, resulting in time saved on flushing and commissioning. Firstly, this is due to the control valves being centralised in one location, so that multiple terminal units can be commissioned at a single point. Secondly, using an ultrasonic meter allows for accurate flow measurement and the use of the subtraction method to aid in commissioning. Below are the steps for the subtraction method:
1.The flow through all of the terminal units connected to the commissioning module is measured to obtain a combined flow rate.
2.When one terminal unit is isolated, the flow rate through the remaining terminal units is still high enough to measure.
3.The difference between the combined flow rate of all the terminal units and when one terminal unit is isolated is equivalent to the flow rate of the unit which was isolated.