MC2: 10/03/12 Page
83
of
90
GF-115-H
TAG-0083_0B
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
CHAPTER 13:
BOILER WATER QUALITY AND
MAINTENANCE
IMPORTANT!
•
AERCO requires that the boiler loop to be de-coupled from the system loop. This can be achieved by
one of the following:
o
Employing primary-secondary piping.
o
Installation of a hydraulic separator between the boiler and the system loop.
o
Installation of a heat exchanger (for example, plate heat exchanger) between the boiler and the
system loop.
If water treatment used in the system is not Aluminum compatible, the use of
a heat exchanger between the system and the boiler piping is MANDATORY.
•
AERCO requires cleaning of the whole system and to fit a mandatory Y-strainer on the return pipe to
the boiler, equipped with isolation valves (See
Figures 16
to
23
at the end of Piping Design
Application Guide
GF115-P-H
. See
Section C.4
in this manual for Flushing, Treatment, and
Cleansing tips and guidelines).
•
For boiler replacement installations, cleaning of the whole system is required before connecting the
Modulex boiler (See
Section C.4
for Flushing, Treatment, and Cleansing tips and guidelines).
•
Failure to clean a system will limit it from the full benefits offered by the high efficiency Modulex boiler.
•
Boiler drain valve and condensate drain trap should be arranged to permit the fluids to drain freely, by
gravity, to a convenient floor drain.
•
Relief valve must be installed vertically in the top, side, or to a valveless header connected to the
water supply outlet.
•
Locate water supply and return fittings (i.e. unions, elbows, etc.) a minimum of 6 inches (from the
boiler fittings to prevent interference with the removal of the boiler panels and covers.
•
All piping and electrical connections (i.e. service switches, conduit boxes, etc.) should be located at a
minimum of 6 inches from the boiler panels and covers.
•
See
Table 1
for sizing guidelines for the mandatory primary pump and boiler strainer.
A discharge pipe must be used and must not have an internal cross-sectional area less than the outlet of
the relief valve. The discharge pipe must be installed so that there will be no danger of scalding to the
boiler attendants. See
Figure 1
, next page, for discharge pipe example on the Modulex boiler. The relief
valve point of discharge piping must have provisions for proper drainage.
]
