MC2: 10/03/12 Page
28
of
90
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
GF-115-H
OMM-0083_0B
Modulex MLX Series Gas Fired Boiler System
Operation and Maintenance Manual
Chap 5:
Piping
5.6 System Filling and Draining
Reference the following points when filling and draining the system:
•
For filling-up the system, a filling tap has to be inserted on the system return pipe.
•
The filling-up can also be made through the draining tap on the boiler return manifold.
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In both cases, an approved hydraulic disconnection system has to be fitted.
•
Before connecting the boiler, carefully rinse out the whole system with running water.
5.7 Notes On Condensate Drain
To maintain proper flow of condensate the drain pipe must slope toward the drain of at least 3/8 in./ft.
(30 mm/m). The liquid column inside the condensate siphon needs to be filled with water after
installation. Its minimum height when all the fans are in operation must be at least 1 in. (25 mm). See
Figure 5-1
. In order to help avoid ice from forming, the condensate piping system must be well
insulated.
Do not install the condensate drain where freezing may occur.
Consult local codes with regard to condensate neutralization. Neutralization can be obtained by mixing
it with the buildings drain water or with limestone, which normally have a base pH.
INITIAL TRAP
FILLING-UP PLUG
THE UPPER PART OF THE DRAIN
PIPE SHALL NOT BE HIGHER
THAN THE TRAY BOTTOM
0.98" [25mm]*
BOILER
ROOM
FLOOR
TO CONDENSATE
DRAIN WITH MIN.
INCLINATION OF
3/8 IN/FT [30 mm/M]
TOWARD DRAIN
BASE (MIN. H = 4" [100 mm ]
5.9" [150 mm]**
5.9"
[150 mm]**
Figure 5-1: Typical Condensate Drain Installation
5.8 Gas Mains and Connections
Connect gas service meter to control assembly in accordance with the current version of the ANSI Z223.1
and the local codes or utility. Prior to operation, the complete gas train must be leak tested using a non-
corrosive soap. For gas pipe sizing and additional details, see
GF-115-P-H
.
WARNING
!
!
