Modulex Light Commercial Series
CHAPTER 4: Installation Instructions
OMM-0158_A
• 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
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4.18 Important Installation Warnings
Oxygen Levels in the System Water Warning
All necessary precautions must be taken for preventing the formation and localization of oxygen
in the system’s water. For this reason, ensure that the plastic piping used in under-floor heating
systems is impermeable to oxygen.
Antifreeze Compatibility Warning
If any anti-freeze solutions are used ensure that they are compatible with aluminum and any other
boiler components and materials.
Lime Scale and Corrosive Water Damage Warning
Any damage caused to the boiler due to the formation of lime scale or by corrosive water will not
be covered by the warranty. Appropriate steps must be taken to ensure the indirect tank water
heater does not become plugged by scale caused by hard water or sediment. If the indirect tank
water heater becomes plugged by either scaling from hard water or sediment it is not the
responsibility of AERCO International.
Connection to Refrigeration System Warning
The boiler, when used in connection with a refrigeration system, must be installed so the chilled
medium is piped in parallel with the boiler with appropriate valves to prevent the chilled medium
from entering the boiler.
The boiler piping system of a hot water boiler connected to heating coils located in air Handling
units where they may be exposed to refrigerated air circulation must be equipped with flow control
valves or other automatic means to prevent gravity circulation of the boiler water during cooling.
4.19 Air Intake Connection
Install air intake as shown in Figure 4-21. For air intake connection piping use only:
•
Ø 4’’ PVC Pipes Schedule 40 for Modulex EXT 450-600 2S
•
Ø 6’’ PVC Pipes Schedule 40 for Modulex EXT 800-1100 2S
Figure 4-19: MODULEX EXT Air Intake Connection
NOTE:
Use silicone to
lubricate the internal
surface of the seals
before assembling.
