AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 86)

GF-135 Esteem 399 Low NOx Boiler
Chapter 11
OMM-0089_0A Installation, Operation & Maintenance Manual Start-Up Preparation
11.1.5 Check and Test Antifreeze
For boiler systems containing antifreeze solutions, follow the antifreeze manufacturer’s
instructions in verifying the inhibitor level and to ensure the fluid characteristics are within
specification requirements.
Due to the degradation of inhibitors over time, antifreeze fluids must be periodically replaced.
Refer to the manufacturer of the antifreeze for additional instructions.
11.1.6 Use of Antifreeze in the Boiler System
WARNING!
Never use automotive antifreeze, ethylene glycol antifreeze, or
undiluted antifreeze, in the primary system as freeze protection.
This can cause severe personal injury, death or substantial
property damage.
Determine the antifreeze fluid quantity using the system water content volume and following the
antifreeze manufacturer instructions.
The water volume of the Esteem 399 Low NOx boiler is approximately 7 gallons [26 L].
Remember to include the volume of the expansion tank.
Check with local codes requirements for the installation of backflow preventers or actual
disconnection from the boiler’s cold water fill or make up water supply line.
NOTE
Massachusetts Code requires the installation of a backflow
preventer if antifreeze is used.
Ensure the concentration of antifreeze to water does not exceed a 50/50 ratio.
NOTE
System water, including additives, must be practically non-toxic,
having a toxicity rating or Class of 1, as listed in Clinical Toxicology
of Commercial Products.
11.2 BOILER CLEANING
11.2.1 Cleaning an Old Boiler and System
Perform the following to clean an old boiler and system.
Cleaning an Old Boiler and System
1. Drain the existing system.
2. Fill system with fresh water and cleaner.
3. Place existing boiler in operation and run all zones.
4. Follow manufacturer’s instructions for proper cleaner concentration and proper cleaning time.
5. Thoroughly drain and flush system with fresh water after cleaning.
Page 86 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288