Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions
OMM-0095_0H
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
37
of
144
GF-139
Phone: 800-526-0288
09/15/2017
The liquid column, inside the condensate siphon, (see Condensate Siphon Filling Plug in Figure
4-9) needs to be filled with water after installation. The minimum height of the water in the
column, when all the fans are in operation, must be at least 25 mm (1 in.).
In order to avoid ice formation while the boiler is operating, which can cause the boiler to stop
functioning, the entire condensate evacuation system must be well insulated. Note that it is
forbidden to evacuate the condensate through an open gutter to prevent the risk of ice forming
and avoid exposure of the corrosive condensate to the external environment.
The condensate must be neutralized before being evacuated to the sewer, which can be
achieved by mixing the condensate with lime or with drain water coming from washing
machines, dish washing machines, etc., which normally has a base pH.
The connection to the sewer will be through a closed, but visible drain. Given the high acidity
(pH 3 to 5) of the condensate, only plastic material may be used for the condensate evacuation
pipes. Moreover it must be dimensioned and constructed so as to allow the correct out-flow to
the drain, preventing any bottleneck and any leakage.
Consult local codes regarding condensate neutralization. Neutralization may be obtained by
mixing it with the buildings drain water or with limestone, which normally has a base pH.
AERCO International offers a condensate neutralizing kit and a neutralizing tank, for preparing
condensate waste for safe evacuation into a sewer system, if other means of neutralizing the
waste are not available.
Figure 4-9: MODULEX EXT Condensate Piping
The outlet of the condensate drain pipe exits from the right side of the boiler, just below the
RIGHT-SIDE flue outlet opening.
IMPORTANT!
If it is not possible to use a 4’’ (101mm) base or housekeeping pad on which to place the
boiler, install the boiler on the floor and provide a well or trough (minimum of 4’’ - 101 mm
deep) in which to lodge the U of the condensate piping. See Figure 4-9.
WARNING!
•
Before commissioning the boiler, fill the condensate siphon with water, at the
dedicated filling-up plug. See Figure 4-9.
•
Do not install the condensate drain where freezing may occur.
Use materials approved by the authority having jurisdiction in your area. In the absence of such
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 ULC certified PVC or CPVC
pipe, fittings and cement.
Periodic cleaning of the condensate disposal system must be
carried out.