AERCO C-More Controls Manual June 2010 - Manual (Page 66)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
Page 66 of 162 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 04/22/14
GF-112 Phone: 800-526-0288 OMM-0032_0E
MENU OPTION SETTING
Boiler (or Heater)
Mode Constant Setpoint
Internal Setpt Select desired setpoint using
▲
and ▼ arrow keys (40°F to 240°F)
Refer to paragraph 2.2 for detailed instructions on changing menu options.
5.3.2 Remote Setpoint Modes
The unit’s setpoint can be remotely controlled by an Energy Management System (EMS)
utilizing either a current or voltage signal level.
The current/ voltage signal can be at either of the following levels:
• 4 - 20 mA/1 - 5 Vdc
• 0 - 20 mA/0 - 5 Vdc
The factory default setting for the Remote Setpoint mode is 4 - 20 mA/1 - 5 Vdc. With this
setting, a 4 to 20 mA/1 to 5 Vdc signal, sent by an EMS or BAS, is used to change the unit's
setpoint. The 4 mA/1V signal is equal to a 40°F setpoint while a 20 mA /5V signal is equal to a
240°F setpoint. When a 0 to 20 mA/0 to 5 Vdc signal is used, 0 mA is equal to a 40°F setpoint.
In addition to the current and voltage signals described above, the Remote Setpoint mode can
also be driven by a RS485 Modbus Network signal from an EMS or BAS.
The Remote Setpoint modes of operation can be used to drive single as well as multiple units.
NOTE
If a voltage, rather than current signal is used to control the
remote setpoint, a DIP switch adjustment must be made on the
PMC Board located in the Control Panel Assembly. Refer to
Appendix D for details.
In order to enable the Remote Setpoint Mode, the following menu setting must be made in the
Configuration Menu:
MENU OPTION SETTING
Boiler Mode Remote Setpoint
Remote Signal 4-20mA/1-5V,
0-20mA/0-5V, or Network
Refer to paragraph 2.2 for detailed instructions on changing menu options.
If the Network setting is selected for RS485 Modbus operation, a valid Comm Address must be
entered in the Setup Menu. Refer to Modbus Communication Manual GF-114 for additional
information.
While it is possible to change the settings of temperature related functions, the unit is factory
preset with settings that work well in most applications. It is suggested that an AERCO
representative be contacted, prior to changing any temperature related function settings. For
descriptions of temperature-related functions and their factory defaults, refer to Tables 3-1 and
3-2.