AM Series Boilers and Water Heaters User Manual
CHAPTER 10
– MAINTENANCE
OMM-0100_E
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GF-146
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11/15/2019
Technical Support
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(800) 526-0288
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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.
C
lose 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.
10.24 Water and Flue Temperature Sensor
The boiler has a number of sensors that measure temperature. For proper function, the
electrical resistance between the sensor wires must correspond with the values shown in Figure
10-12 for both boilers and water heaters.
