GF-135
Esteem 399 Low NOx Boiler
Chapter 11
OMM-0089_0A
Installation, Operation & Maintenance Manual Start-Up Preparation
Page
87
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
11.2.2 Cleaning of New Boiler/System:
Perform the following to clean a new boiler and system.
Cleaning a New Boiler and System
1. Install new boiler and flush system with cleaner water to remove any debris.
2. Fill system with fresh water and proper amount of inhibitor.
3. Verify pH and inhibitor level per inhibit or manufacturer’s specs; add inhibitor if necessary.
11.2.3 Filling the Boiler System
Perform the following to fill the boiler system.
Filling the Boiler System
1. Close the boiler drain valve located on the bottom of the unit and any manual or automatic air
vent in the system.
2. Open all system isolation valves.
3. Fill the boiler system to correct system pressure. Correct pressure will vary with each
application.
NOTE
Typical residential system fill pressure is 12 psi. System pressure
will increase when system temperature increases. Operating
pressure of the system should never exceed 25 psi.
4. Purge air and sediment in each zone of the boiler system through the purge valve. Open air
vents to allow air to be purged in the zones.
5. Once the system is completely filled and purged of all air and sediment, check the system
pressure and check/repair any leaks.
WARNING!
Unrepaired system leaks will cause continual makeup water to be
added to the boiler. Continual makeup water will cause mineral
buildup within the heat exchanger, reducing the heat transfer,
causing possible heat buildup and eventual heat exchanger failure.
11.3 CHECK LOW WATER CUT-OFF DEVICE
The Esteem boiler is provided with a factory installed LWCO device that measures system
pressure of more than 10 psi.
Remove the front jacket panel and check for continuity across the low water cut-off device wire
terminals. The contacts should be closed when system pressure is greater than 10 psi. See
Figure A-2 in Appendix A for location of the LWCO (Item 6).
