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GAS-FIRED BOILER Boiler Manual
PART 7: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL
(CONTINUED)
I. CONDENSATE REMOVAL SYSTEM
This is a condensing high efficiency appliance,
therefore this unit has a condensate removal
system. Condensate is nothing more than water
vapor, derived from the combustion products,
similar to an automobile when it is initially start-
ed. It is very important that the condensate line
is sloped away from the boiler and down to a
suitable inside drain, if the condensate outlet on
the Munchkin Boiler is lower than the drain, you
must use a condensate removal pump (kit P/N
554200 available from Heat Transfer Products,
Inc.) A condensate filter, if required by local
authorities can be made up of lime crystals,
marble or phosphate chips will neutralize the
condensate. This can be done in the field by the
installer or you may purchase one from Heat
Transfer Products, Inc. (P/N N1100) It is also very
important that the condensate line is not
exposed to freezing temperatures, or any other
type of blockage. Plastic tubing must be the only
material used for the condensate line. Steel,
brass, copper or others will be subject to corro-
sion or deterioration. A second vent may be
necessary to prevent condensate line vacuum
lock if a long horizontal run is used. Also, an
increase in pipe size may be necessary to drain
properly. Support of the condensation line may
be necessary to avoid blockage of the conden-
sate flow.
CAUTION
The condensate line must remain unobstructed,
allowing free flow of condensate. If condensate
is allowed to freeze in the line or if the line is
obstructed in any other manor, condensate can
exit from the boiler tee, resulting in potential
water damage to property.
NOTICE
Use materials approved by the authority having
jurisdiction. In the absence of other authority,
PVC and CPVC pipe must comply with ASTM
D1785, F441 or D2665. Cement and primer must
comply with ASTM D2564 or F493. For Canada,
use CSA or ULC certified PVC or CPVC pipe,
fittings and cement.
When installing a condensate pump, select one
approved for use with condensing boilers and
furnaces. The pump should have an overflow
switch to prevent property damage from
condensate spillage.
Condensate from the Munchkin Boiler will be
slightly acidic (typically with a pH from 3.2 to
4.5). Install a neutralizing filter if required by
local codes.