Heat Transfer MODCON VWH 300 LP Installation & Maintenance page 32

PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL
monitors the condensate level to prevent it
from backing up into the combustion system.
There is a ¾" sweat connection provided to
connect the outlet of the collection system to
a drain or condensate pump. (See table 6-3
for approved condensate piping material)
CAUTION
It is very important that the condensate piping
be no smaller than ¾" and you must use a tee
at the condensate connection with the branch
vertically up and open to the atmosphere so it
will not cause a vacuum that could obstruct the
flow of condensate from the boiler. The
condensate piping should also be properly
supported with pipe supports to prevent
sagging and to maintain the pitch of the piping.
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GAS-FIRED HOT WATER SUPPLY BOILER
4. Condensate Neutralization
The condensate from the boiler is slightly
acidic with a ph of 3.2 - 4.5 Heat Transfer
Products recommends neutralizing the
condensate with a Condensate Neutralizer Kit
(p/n 7350P-611) that can be added to your
system to avoid long term damage to the
drainage system and to meet local code
requirements. The neutralizer kit is connected
to the drain system and contains marble
chips that will neutralize the ph level of the
water vapor. The neutralizer should be
checked at least once a year and the marble
chips should be replenished if necessary.
When replacing the marble chips, they
should be no smaller than ½" to avoid
blockage in condensate piping. (Refer to Fig.
6-1 and 6-2 for piping of the Condensate
neutralizer.)
Boiler Manual
(CONTINUED)