Form: 2435
Revision: 9
Free Flex Installation and Operation Manual
Date: 9-1-2017
Bryan Steam LLC, 783 N Chili Ave, Peru IN 46970
Web:
www.
bryanboilers
.com
Phone:
765-473-6651
Fax:
765-473-3074
Email:
28
Fill the system with this solution, venting all
air. Then, with the circulating pump running,
bring the system to design or operating
temperature. After circulating water for two
to three hours, the system should be drained
completely, and refilled with fresh, softened
water see section 3.8. Usually enough of the
cleaning solution will adhere to the piping to
result in an alkaline solution satisfactory for
operation. A pH reading between, 8.3 – 10.5
is preferred. If necessary, to increase the pH,
a small amount of cleaner may be added.
3.6.3
Replacement Boiler Installations
Clean or replace all system piping and heating
units.
Arrange for chemical or mechanical cleaning
of the entire system. A chemical treatment
company should be consulted for the proper
means of any chemical cleaning. Replace any
piping that is deteriorated beyond safe or
cleanable condition.
Flush the system clean, being certain to isolate
the boiler.
WARNING
Do not flush the system through the
boiler.
For some old systems, there is a reluctance to
clean the piping because of possible leaks
occurring in badly corroded lines. Should the
customer refuse cleaning, it is necessary to
install filtration equipment. Install either a
fibrous filter or a centrifugal filter in the boiler
return piping. This will collect and remove
sediment from the system. A booster pump
may be required to overcome the additional
pressure drop introduced in the line by the
filter. When filling the system, provide
chemical treatment as outlined in Section 3.8.
Failure to properly clean the system or to
install mechanical sediment removal
equipment can result in tube blockage and
severe corrosion plus damage to pumps,
controls, and air removal devices.
Inspect, repair as necessary, or replace system
air control devices.
Install gauge glasses on air expansion tanks
and install a tank fitting in the system
connection to the tank.
Install a strainer in the boiler return piping.
3.7
Draining and refilling the boiler &
system
If the system is drained and then refilled,
chemical treatment is essential to treat the raw
water. Use only clean, softened water.
3.7.1
Filling The System
WARNING
Use only clean, softened, and treated
water. Chemical treatment of the raw
water is essential when filling or refilling
the system see section 3.8.
3.7.2
Hydrostatic Test Of Boilers And
System
After completing the boiler and burner
installation, the boiler connections, fittings,
attachments and adjacent piping must be
inspected for leaks by filling the unit with
water. The pressure should be gradually
increased to a pressure just below the setting
of boiler safety relief valve(s).
