Modulex EXT

A breakthrough in high-efficiency design, AERCO’s condensing and fully modulating Modulex boilers support 321 to 3060 MBH hydronic heating systems while delivering a greater degree of operating reliability for customer peace of mind. To achieve the greatest possible fuel savings, each boiler combines independent, 161,500 or 382,000 BTU/hr thermal modules that operate to deliver superior turndown and a range of non-cycling operation not readily achieved by competitive equipment or controls.

FEATURES AND BENEFITS

  • Condensing Boiler
  • Natural Gas or Propane
  • Unmatched Turndown
  • 7:1 to 39:1 Depending Upon Unit
  • Whisper Quiet Operation <50 dBa
  • Low NOx Emission <20 ppm
  • Direct or Conventional Vent with PVC, CPVC,Polypropylene or AL29-4C Materials
  • Common Vent Capability
  • Outdoor Installation Capable with no additional accessories or changes
  • Small, Doorway-Size Footprint
  • Flexible Piping and Venting Connections
  • Equipped with Sealed Combustion
  • Superior Reliability
  • Minimal Maintenance
  • Easy Open Access for Serviceability
  • 0-10V output to control primary VFD pump
  • Supports Integration to BAS System
Model Min. Input BTU/hr. Max. Input BTU/hr. Max Output* BTU/hr. Efficiency Range
MLX EXT 321 46,000 321,000 281,000-305,000 87% to 99%
MLX EXT 481 46,000 481,500 422,000-457,000 87% to 99%
MLX EXT 641 46,000 642,000 564,000-609,000 87% to 99%
MLX EXT 802 46,000 802,500 707,000-762,000 87% to 99%
MLX EXT 962 46,000 963,000 850,000-914,000 87% to 99%
MLX EXT 1123 46,000 1,123,500 993,000-1,067,000 87% to 99%
MLX EXT 1530 83,000 1,530,000 1,448,000-1,518,403
MLX EXT 1912 83,000 1,912,000 1,810,000-1,903,000
MLX EXT 2295 83,000 2,295,000 2,171,913-2,286,476
MLX EXT 2677 83,000 2,677,000 2,533,925-2,672,390
MLX EXT 3060 83,000 3,060,000 2,897,080-3,071,951
*Note: Max output varies depending on supply and return water temperatures, please contact for factory representative for greater details

Combustion view ports and easy access to all operating components further simplify minimal maintenance requirements. The Modulex EXT comes standard with a powder coated enclosure allowing for outdoor installations. In addition to controlling the boiler according to a constant set point, indoor/outdoor reset or 0-10V signal, one or more units can be integrated via Modbus communications protocol to a facility wide Energy Management or Building Automation System.In addition to minimizing redundant capacity needed for any project, these quiet and lightweight boilers can support low NOX and low gas pressure applications as well as a variety of venting materials. The unit offers multiple supply/return piping and venting locations for installation flexibility and allows for multiple units to be easily co-located for greater than 3 million BTU/hr applications.

OPTIONS AND ACCESSORIES

AERCO Condensate Neutralizer Kit

Ideal for neutralizing condensate from condensing boilers and furnaces operating on natural gas or propane.

Communications Gateway

Optional accessory supports boiler or BMS integration with BACnet, LonWorks and N2 systems.

Constant Speed Pumps

These kits include a circuit setter which allows for setting flow rates that meet the minimum allowable boiler flow rate and do not exceed the maximum. Pump Kits 99127-1 to 99127-7 are in-line and permanently lubricated for ease of maintenance with a cast iron body and electrical requirement of 115V/1ph/60Hz. Pump Kits 99208-3 to 99208-7 incorporate back-pull-out design which allows service without disturbing the piping; cast iron body and electrical requirement of 115V/208-230V/1ph/60Hz.

Hydraulic Separator

These hydraulic separators establish primary-secondary piping for AM Series boiler applications. Primary-secondary piping de-couples the boiler loop from the system loop — making it independent from system loop pressure fluctuations associated with opening/closing of zone valves or 3-way valves.

Sentinel Products

Compatible with all materials found in a hydronic loop, these chemicals offer overall protection of a heating system from sludge, scale, corrosion, and freeze conditions.

Variable Speed Pumps

These kits include an Interface Module that accepts 0-10VDC control input for remote adjustment of differential pressure setpoint or pump speed. The pumps are in line, flanged wet rotor circulator for ease of maintenance with a cast iron body and electrical requirement of 230V/1ph/60Hz.

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