A
BOILER FEED SYSTEM MAY BE USED IN
CONJUNCTION WITH AN EXISTING
CONDENSATE RECEIVER SYSTEM BY
ALLOWING THE RECEIVER SYSTEM TO
PUMP CONDENSATE INTO THE BOILER
FEED SYSTEM TANK
.
N
OTE
:
IT IS NOT RECOMMENDED TO
PROVIDE THE MAKE
-
UP FOR A CLOSED
STEAM HEATING SYSTEM TO THE BOILER BY
MEANS OF A WATER FEEDER
. I
T IS
PREFERRED THAT SYSTEM MAKE
-
UP BE
CONNECTED TO THE CONDENSATE RETURN
TANK OF A BOILER FEED SYSTEM
.
3.4-2
CLEAN OR REPLACE ALL SYSTEM PIPING
AND HEATING UNITS
N
OTE
:
FOR SOME OLD SYSTEMS
,
THERE IS A RELUCTANCE TO CLEAN THE
PIPING BECAUSE OF THE POSSIBILITY OF
LEAKS OCCURRING IN BADLY CORRODED
LINES
. S
HOULD THE CUSTOMER REFUSE
CLEANING
,
IT IS NECESSARY TO INSTALL
FILTRATION EQUIPMENT
. I
NSTALL EITHER A
FIBROUS FILTER OR A CENTRIFUGAL FILTER
IN THE BOILER RETURN PIPING
. T
HIS WILL
COLLECT AND REMOVE SEDIMENT FROM
THE SYSTEM
. A
BOOSTER PUMP MAY HAVE
TO BE INSTALLED AS WELL TO OVERCOME
THE ADDITIONAL PRESSURE DROP
INTRODUCED IN THE LINE BY THE FILTER
.
W
HEN FILLING THE SYSTEM
,
PROVIDE
CHEMICAL TREATMENT AS OUTLINED IN
S
ECTION
3.5.
Arrange for chemical and mechanical cleaning of
the entire system. A chemical treatment company
should be consulted for the proper means of this
chemical cleaning.
Replace any piping considered to be deteriorated
beyond safe or cleanable condition. Flush the system
clean, being certain to isolate the boiler.
DO NOT FLUSH THE SYSTEM THROUGH THE
BOILER.
C
AUTION
:
FAILURE TO PROPERLY
CLEAN THE SYSTEM OR TO INSTALL
MECHANICAL SEDIMENT REMOVAL
EQUIPMENT CAN RESULT IN PIPE
BLOCKAGE AND SEVERE CORROSION
PLUS DAMAGE TO PUMPS
,
CONTROLS
,
AND AIR REMOVAL DEVICES
.
3.5 BOILER WATER TREATMENT
3.5-1
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.
3.5-2 OBJECTIVES
The basic objectives of water treatment are:
?
Prevent the accumulation of scale and
deposits in the boiler.
?
Remove dissolved gases from the water.
?
Protect the boiler against corrosion.
?
Maintain the highest possible boiler
efficiency.
?
Decrease the amount of boiler down
time from cleaning.
3.5-3 CONTINUOUS
MONITORING
REQUIRED
Water treatment should be checked and
maintained 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
