MC2: 10/03/12 Page 12 of 90
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Modulex MLX Series Gas Fired Boiler System
Operation and Maintenance Manual
Chap 2: General
Description
2.2 Code and Standards Approvals
MODULEX has been reviewed for compliance with the applicable sections of the following North
American Standards:
• Z21.13: Gas fired low pressure steam and hot water boilers.
• ASME SECTION IV: Boiler and pressure vessel code rules for construction of heating
boilers.
• BTS 2000: Testing standard method to determine efficiency of commercial space heating
boilers.
• SCAQMD Rule 1146.2: NOx emissions from water heaters and small boilers.
• CSD-1-2004: Controls and safety devices for automatically fired boilers.
Table 2-1: Modulex Boiler Output Range, Turn-Down Ratio & Condensate Production
Heat
Modules
Model
Output Range MBH
1
(KW)
Turn
Down
Ratio
Condensate Production [gph (l/h)]
Min. Max. Min. Max.
2.3 Installation Flexibility
The Modulex boiler allows for installation flexibility, i.e. it is suitable to be connected with the water
supply and return and the gas connections on the Right Hand (right-hand) side (standard delivery
condition) or on the Left Hand (left-hand) side. This is accomplished by reversing the gas and water
manifolds utilizing the instructions supplied with the boiler. The same is true for the vent pipe
connection, which at the installation, can be moved from the right-hand side (standard delivery condition)
to the left-hand side or to the rear of the boiler. The installation flexibility features include the following:
• Two or more Modulex boilers may be installed in a multiple boiler system with gas connecting pipes,
supply/return water pipes arranged for connection to either the left or right-hand side of each unit.
The unit is shipped with all connections on the right hand side as viewed from the front of the unit.
• The vent pipe may be installed on the right, the left, or behind the heating system.
NOTE
Installation of the vent behind the unit will require accommodations for
the easy removal of the venting in order to provide service that requires
removal of the rear panel.
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