User Manual

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 8 – WATER HEATER MANAGEMENT
OMM-0103_0A AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 117 of 178
GF-147 Phone: [phone] PRI: 10/28/2014
8.3.4 Modbus Header Sensor
This optional feature allows users to monitor the combined system Outlet Temperature or the
system Tank temperature via Modbus. This feature requires a Modbus temperature sensor
module to read and transmit the temperature to the Master unit. Temperature may be viewed in
either ˚F or ˚C.
Each unit has the following Modbus Header Temp points available:
 MB Head Temp En: This menu allows the user to enable/disable the Modbus Header
Temp.
 Header Temp Addr: A user must enter Modbus module address. Default is 240.
 Header Tmp Point: A user must enter Modbus register point. Default is 14.
 WHM Header Temp: This menu item displays the Temperature.
8.3.5 Automatic Temperature Sensor Calibration
This feature allows the user to automatically calibrate the temperature sensors to achieve
optimal system performance and efficiency. This feature requires an AERCO Temperature
Calibration dongle (fixed resistor set) and a password level to access the calibration menu.
Following are the steps required to Auto-calibrate the temperature sensors.
1. Disable the unit.
2. Remove the P1 harness from the back of the CMORE box and insert the dongle in its
place.
3. In the “Cal Temp Sensor” item of the calibration menu, change the menu entry to “Start”
and hit the “Enter” Key.
4. This feature will only calibrate Inlet water Temp, FFWD Water Temp, Exhaust Air temp
and Outlet Water Temp.
5. In this version, this feature will not calibrate the Inlet Air temp and Outdoor Air temp
sensors. Once the calibration has been completed, remove the dongle and insert the
harness P1 back into the C-More.
8.3.6 Manual Mode Password Required
In order to prevent unauthorized or inadvertent setting the MANUAL mode of operation, entering
a valid password is required to set the C-More in MANUAL mode. Any level password will
enable the Manual Mode button. Manual mode is a temporary run state and switches back to
Automatic mode once the password expires after 1 hour of menu inactivity.
8.3.7 Quick Re-Flash Feature
As of Firmware version 3.08.05, critical system settings can be saved prior to Re-Flashing a
unit. The settings can then be recalled following the RE-Flashing to avoid manual entry of all
system settings. The system settings are saved on the C-More PMC board. To save settings,
enable “Save CMore Setup” in the Diagnostic Menu. To restore all system settings following a
system re-flash, select “Restore Setup” in the Diagnostic menu. This feature was added to
make it easier to update the firmware on a unit and is available on versions 3.08.05 or greater.
IMPORTANT NOTE:
Following a “Restore Setup” operation, the C-More power MUST be cycled
off and on to assure the settings are restored.