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:
sales@bryansteam.com
29
Remove the boiler tube access panels (see
dimensional drawing in the boiler manual).
Inspect the tube to header joints to be certain
that all tube fittings are sealed. This is
necessary because, although the boiler is
hydrostatically tested at the factory, minor
leaks in fittings and at attachments can
develop from shipping vibration or from
installation procedures. Replace tube access
panels before proceeding to start boiler.
3.8
Boiler Water Treatment
3.8.1
Purpose of water treatment
Water treatment is required for satisfactory
operation of the boiler. It must be devised to
prevent depositing of scale and corrosion
from acids, oxygen and other such harmful
elements that may be in the water supply. A
qualified water treatment chemist should be
consulted and the water systematically treated.
“Hot water systems must operate with a pH
above 8.5. A system that has a pH below 8.5
will usually develop the following problems:
1.
Gas formation (air trouble)
2.
Pump seal and gland problems
3.
Air vents sticking and leaking
4.
Frequent relief valve operating
5.
Piping leaks at joints
(American Boiler Manufacturers Association
[ABMA], 2005. Boiler Water Quality
Requirements and Associated Steam Quality
for Industrial / Commercial and Institutional
Boilers)”
3.8.2
Objectives
The basic objectives of water treatment are:
1.
Prevent the accumulation of scale and
deposits in the boiler.
2.
Remove dissolved gases from the water.
3.
Protect the boiler against corrosion.
4.
Maintain the highest possible boiler fuel
efficiency.
5.
Decrease the amount of boiler down
time from cleaning.
3.8.3
Water softener
It is highly recommended that a zeolite water
softener be used for all make-up to the boiler.
It is intended that this be used in addition to
the chemical treatment of the boiler. Water
softening removes calcium and magnesium,
the primary causes of hard boiler scale.
3.8.4
Continuous Monitoring
Water treatment should be checked and
maintained according to Table 14 whenever
the boiler is operating. The boiler operator
should be sure that the boiler is not operating
for long periods without proper water
treatment.
Water treatment may vary from season to
season or over a period of time. Therefore,
the water treatment procedure should be
checked not less than four times a year, and
possibly more frequently as the local water
conditions may indicate.
See Table 13 for examples of typical chemical
agents found in untreated water along with
their potential effects.
Table 13: Chemical Agents and Effects
Compound
Effect
Calcium Carbonate,
(CaCO3)
Soft Scale
Calcium Bicarbonate
(CaHCO3)
Soft scale,
CO2
Calcium Sulphate (CaSO4)
Hard Scale
Calcium Chloride (CaCl2)
Corrosion
Magnesium Carbonate
(MgCO3)
Soft Scale
Magnesium Bicarbonate
(MgHCO4)
Corrosion,
Scale
