Aertrim Activation; Operation Details - Watts AERCO Benchmark BMK5000 Operation And Service Manual

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 9 – AERTRIM OPERATION

9.2 AERTRIM ACTIVATION

AERtrim is activated at the factory prior to shipping all Benchmark Platinum boilers. However, if
the Edge Controller is replaced for any reason, you must activate the AERtrim function by entering
an activation code, as described below. Note that the activation code for each unit is unique,
based on the unit's serial number, and thus cannot be transferred to any other unit; if you have
multiple units, you must take care to install the correct code on the correct unit.
AERtrim Activation Instructions
1. Record the following information from the unit you wish to activate. To do this, go to the
Main Menu → Advanced Setup → Performance → AERtrim → AERtrim Settings
scroll down until you see the following parameters:
•
Unit Serial #, found on the unit's code plate. For example, G-18-1050
•
Trim ID
•
Fixed ID
2. Contact AERCO Sales Administration with the information found in step 1. They will
provide you with an activation code.
3. Once you have obtained the activation code, go back to
→ Performance → AERtrim → AERtrim
4. Find the Activation Code parameter, enter the activation code and press Save.
5. Scroll back to the top of the AERtrim Settings screen and set the AERtrim parameter to
Enabled.
AERtrim → O2 Trim Parameters
6. Go to the
O2 Lower Limit parameters are at default values but can be changed as needed.
NOTE: For full instructions, including all menu options, see the Edge Controller Manual,
Section 6.6.1: AERtrim.

9.3 OPERATION DETAILS

During operation, the AERtrim system will adjust the command voltage sent to the combustion
air blower within a limited range. The amount of voltage trim depends on the error between the
desired O % (target %) and the current reading of the O
2
low limits of blower voltage for each valve position. The total amount of corrective voltage trim
is limited by the controller to insure safe and reliable operation of the system.
The AERtrim system has a rolling active/inactive operation based on 4 hours on / 10 hours off
sequence. Since this is a trim function and not an active control function, the trim activity can
make adjustments in the blower voltage calibration values on the 4/10 schedule to effectively
control the air/fuel mixture without continuous operation of the sensor. This method achieves
the objective for long term efficiency of boiler operation while maximizing the sensor life in the
boiler environment. The 14-hour cycle insures that the 4 hour on period will be active for any
hour of the day every four days as shown below.
OMM-0137_J •
12/20/2022
Settings.
screen. The O2 Target, O2 Upper Limit and
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Main Menu → Advanced Setup
sensor (O %) and also on high and
2 2
and
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