Modulex EXT Series Piping Application Guide
TAG-0096
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
5
of
7
Phone: 800-526-0288
10/06/2021
6.
GAS HEADER SIZING
Main supply gas pipe sizing should be developed for the total plant. Boiler gas manifold piping should
be sized based on the volume requirements and lengths between boilers and the fuel main. Header
sizes can be either full size or stepped in size as units are connected. A typical gas piping header
diagram for two AERCO Modulex boilers is illustrated in
Figure 2
. Header should be located above or
behind boiler. Gas piping should not be installed directly over top or front of any part of boiler.
Figure 2: Typical Multiple Boiler Gas Manifold Construction
Ensure proper clearances for maintenance. Piping should not interfere with the removal of the
unit’s sheet
metal nor impede maintenance. Observe service clearances around the boiler as listed below and as
shown in Figures 3, 4, and 5:
EXT 450 2S, 600 2S, 800 2S and 1100 2S
•
TOP of the boiler:
24‘‘ (600 mm)
•
FRONT of the boiler:
24’’ (600 mm)
•
RIGHT side:
24’’ (600 mm)
•
LEFT side:
24’’ (600 mm)
•
FLOOR/GROUND:
4’’ (100 mm)
•
BACK of the boiler:
24’’ (600 mm)
EXT 1500 2S, 2300 2S, 2600 2S and 3000 2S
•
TOP of the boiler:
24‘‘ (600 mm)
•
FRONT of the boiler:
24’’ (600 mm)
•
Exhaust vent side:
32
’’ (600 mm)
•
All non-vented sides:
24’’ (600 mm)
•
FLOOR/GROUND:
4’’ (100 mm)
