AHG Solutions Guide_Edition 2.7

Contents
Modulex EXT - Condensing Boilers
Each heat generating module within our Modulex EXT
boilers is self-contained, with its own downfiring premix
gas burner, fan, ignition and safety controls. As
system load decreases, a built-in Boiler Cascade Manager
modulates the boiler down to the combined minimum. As
loads continue to reduce, individual modules are switched
off as necessary down to a minimum output of a single
module – 12kW for 150-350kW models and 22kW for 440-
1200kW models. This ensures optimum load matching
and minimises wasteful boiler cycling, maximising energy
efficiency in the process. The combination of a high
modulation ratio up to 1:54 and a high output plus very low
water content ensures rapid warm-up and turn-down times
for Modulex EXT boilers. They are subsequently also able to
respond quickly to changing demands throughout the day.
Thanks to their modular design, Modulex EXT boilers will
continue to operate even in the unlikely event that a single
module malfunctions.
CONDENSING &
CONVENTIONAL BOILERS
Features
• Exceptional energy efficiency
(up to 109% at the minimum modulated capacity)
• Low noise
• Ultra low emissions
• Full BMS capability.
Allows monitoring of performance and faults
• Variable Water Flow rate - Allows the boiler to operate at a
constant 20°ΔT – maintaining the boiler at the most efficient
duty point.
• Able to be supplied as dismantled - When needing to achieve
installation in tight plant rooms or inaccessible areas, this
feature can enable much better access and often saves
significant costs involved in placing equipment via a crane
from outside the building.
Advantages
• High turndown ratio of up to 1:54 - This provides significant
energy savings, particularly for part load or low load
requirements. It also stops boiler cycling and contributes to
its very quiet operation.
• Multi burner construction - If one burner requires
maintenance, the other burners can continue to operate,
providing built-in redundancy.
• Small space saving footprint - This makes it easy to install
in plant rooms where floor space is at a premium.
Full BMS
capability
Allows monitoring
of performance
and faults
Low nox