Chapter 2: General Information; Correct Use Of The Appliance; Water Treatment; Information To Be Made Available To The User - Watts AERCO EXT Installation, Operation & Maintenance Manual

Modulex EXT Commercial Series

CHAPTER 2: General Information

CHAPTER 2: GENERAL INFORMATION

2.1 Correct Use of the Appliance

The MODULEX EXT Commercial boiler has been designed utilizing the latest heating technologies
and in compliance with current safety regulations. However, if not used or operated properly, the
unit may cause injury or death to persons, or serious damage to the equipment or surrounding
objects.
The MODULEX EXT Commercial boiler is designed to be used in pumped hot water central heating
systems. Any other use of this appliance shall be considered improper, and AERCO declines any
responsibility for damages or injuries caused by the improper use of this equipment. In order to use
the equipment appropriately and safely according to its design, it is essential to carefully follow the
instructions in this manual.

2.2 Water Treatment

•
It is vital to maintain the pH of boiler water between 6.5 and 8. Failure to do so could result in severe
damage to the boiler.
•
The hardness of the main water supply influences the frequency with which the heat exchanger
must be cleaned.
•
In hard water areas where the main water can exceed 9 grains per gallon (gpg) total hardness, a
scale reducing device is recommended.
•
In order to improve the resistance to lime scale it is recommended that the domestic hot water
temperature be as near as possible to the temperature required for end use.
•
AERCO recommends inspecting the state of cleanliness of the domestic hot water heat exchanger
at the end of the first year and subsequently, on the basis of the lime scale found, this period can
be extended to two years after the initial inspection.

2.3 Information To Be Made Available to The User

Go through the information in this manual with the owner/operator and make sure that he or she is
familiar with all necessary operating instructions, in particular:
•
These instructions shall be made available to the end user, together with any other literature
regarding this appliance. It is highly recommended that the user keeps these documents in a safe
and convenient place in order to always have them at hand for future reference.
•
It is imperative that a proper venting and exhaust system be implemented with this unit. Refer to
the AERCO Venting Application Guide (TAG-0098).
•
It is absolutely forbidden to make any alterations to the boiler not in keeping with the manufacturer's
recommendations and instructions.
•
It is critical to check the system's water pressure and ensure it is at the correct pressure.
•
For optimal operation of time and temperature controls, thermostats, heating controls, and
radiators, refer to separate Ufly Controller User Manual (OMM-0159).
•
It is obligatory to carry out comprehensive maintenance services annually with a combustion
analysis every two years (in compliance with national and local laws).
•
If the appliance is sold or transferred to another owner, or if the present user moves from the
installation site and leaves the appliance installed, ensure that the manual stays with the boiler so
that it can be consulted by the new owner and/or installer.
Failure to follow these instructions can cause injury to persons or animals or damage to property. The
manufacturer shall not be held liable for any such injury and/or damage.
OMM-0160_A • DRAFT Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 10 of 117