AM Series Boilers and Water Heaters
CHAPTER 10 – MAINTENANCE
OMM-0100_0D
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
131
of
154
GF-146
Ph.: 800-526-0288
03/28/16
Replacing the Burner 1 (Master) Control Board
- Continued
9. Ensure that all connections that are now disconnected from the replacement board are
secure from shorts or damage by electrically insulating each of the plugs.
10. Replace all covers.
11. Turn on electrical power to the unit.
12. Gain access to the Factory menu, per Appendix B, and set all parameters as shown in the
column “Burner 1 (Master)”. Take special note of parameter 3050, as the unit has lost the
function of a control board, and the 3050 value must be reduced by one unit to reflect this.
13. Shut off electrical power to the unit;
14. Turn on the power to the unit. Now the new Burner 1 control board should drive the unit
correctly.
10.23 Draining the Water from the Unit
To drain the water from the unit, follow the steps below:
Draining the Water from the Unit
1. Cool down the unit by setting the control temperature to the maximum (see Section 9.2 for
boilers and Section 9.14 for water heaters) and wait the temperature gauge shows less than
104°F (40°C).
2. Turn OFF all electrical power off to the heater.
3. Close the manual gas shutoff valve, Figure 7-1.
4. Close the heater isolation valves in the heating system. If isolation valves haven’t been
installed, the entire heating system will have to be drained.
5.
Check that the heating system fill valve is closed.
6. Connect a hose to the drain valves and place the other end of the hose in a sink or some
other suitable drain.
7. Open the drain valves and wait for all water drain.
8. If unit isolation valves have not been installed in the heating system open any bleed valves
at the highest point of the system.
9. After draining out all the water, close the bleed valves and the unit drain valves.
