AERCO C-More Controls Manual June 2010 - Manual (Page 8)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
Page 8 of 162 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 04/22/14
GF-112 Phone: 800-526-0288 OMM-0032_0E
1.3 FEATURES AND BENEFITS
Benchmark, Innovation and KC series units equipped with C-More Control Panels include the
following additional features and benefits:
1.3.1 System Start Temperature
This feature allows a boiler to be enabled or disabled based on the outside air temperature.
When the outside air temperature goes below the System Start Temperature, the boiler is
enabled. When the outside air temperature is above the System Start Temperature, the boiler is
disabled. This feature may be used in any boiler mode of operation. It requires that an outdoor
air temperature sensor be connected to the boiler.
1.3.2 Setpoint Low Limit
This option allows the user to limit how low the unit’s setpoint can be set. The allowable range is
40°F to 240°F. The factory default is set at 60°F.
1.3.3 Setpoint High Limit
This option has two functions. In the Indoor/Outdoor Reset, Constant Setpoint and 4 to 20 mA
Remote Setpoint Modes, the Setpoint High Limit option limits how high the unit’s setpoint can be
set. The allowable range is 40°F to 240°F.
In the 4 to 20 mA Direct Drive, Combination or BST/ACS Mode of operation, the Setpoint High
Limit acts as a temperature limiting governor. Should the unit’s outlet temperature equal the
Setpoint High Limit Setting, a PID function will intervene and maintain the outlet temperature at
the Setpoint High Limit minus the Setpoint Limit Band.
To use the Setpoint High Limit feature, the Setpoint Limiting option must be enabled and a
Setpoint Limit Band selected. This Band is preset at 5°F, however it is adjustable from 0°F to
10°F.
1.3.4 Temp Hi Limit
This is a temperature limit feature that will shut down the unit and generate an alarm if the outlet
temperature exceeds its setting. It is preset at 210°F, but adjustable from 40°F to 240°F.
1.3.5 Max Valve Position
This feature allows the user to limit the unit’s valve position. This feature can be useful if site or
equipment limitations require that less BTU’s be input into the system. This feature is meant to
be used only on a temporary basis until the system or equipment limitations are resolved.
1.3.6 Pump Delay Timer
The C-More Control Panel allows the user to turn a pump on and off as the boiler cycles on and
off on demand. The Pump Delay Timer feature allows the user to keep the pump running up to
30 minutes after the unit has shut down and the demand satisfied.
1.3.7 Aux Start On Delay
This feature works in conjunction with the Auxiliary Relay. When a call for heat is produced, the
Aux Relay will energize and can be used to start a system or gas booster pump, open a louver
or valve, or start some other necessary system process. The Aux Start On Delay is a timer that
can be set from 0 to 120 seconds. It tells the combustion control system to wait a specified
period of time for the device started by the Aux Relay to come up to speed, open or make a
proving switch. Once the waiting period expires, the start sequence will resume. Should the
device not prove within the preset time interval, the unit will shut down and generate an alarm.