AERCO C-More Controls Manual June 2010 - Manual (Page 10)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
Page 10 of 162 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 04/22/14
GF-112 Phone: 800-526-0288 OMM-0032_0E
When the Setpoint Temperature is reached, and remains stable for a period of 15 seconds, the
Deadband mode is enabled and the °F or °C LED will flash on and off.
No Air Fuel Valve corrections will be attempted until the Outlet Temperature exits the Deadband
zone.
The Deadband High and Deadband Low functions are located in the Configuration Menu.
The default values are: Deadband High = 2, Deadband Low = 2.
1.3.14 On/Off Cycling Reduction Functions
When the unit is firing at close to the shutdown limit (minimum Fire Rate), the C-More will
attempt to delay unit shutdown to the Standby Mode for as long as possible, while still
maintaining adequate temperature control. This is accomplished utilizing the HI DB Setpt EN
and Deadband High functions in the Configuration Menu. Refer to Table 3-1 and paragraph
3.1.2.
1.3.15 Demand Offset
The Demand Offset entry allows re-ignition delay of the unit while maintaining proper
temperature control. In normal operation, the unit will re-ignite when the PID Loop calculates
that the required Fire Rate is greater than the Start Level value. Refer to the Demand Offset
entry in the Configuration Menu (Table 3-1) and paragraph 3.1.3.
1.3.16 PID Turn-On Delay
The PID Turn ON Delay defines the time the unit will stay at the “Low Fire” Valve Position level
following the warm-up period after re-igniting. This feature will delay the time in which the
temperature is regulated to the full Setpoint value thus further reducing on/off cycling.
PID Turn ON Delay is in the FACTORY Menu (Default setting is 60 seconds).
The PID Turn ON Delay feature is active only for Boilers and is NOT active for Water Heaters.
Setting the Demand Offset (paragraph 1.3.15) to Zero (0) will also disable the PID Turn ON
Delay.
1.3.17 Propane/Natural Gas Selection
A new entry has been added to the Configuration Menu. This entry permits the selection of
either Natural Gas or Propane as the fuel type (Default = Natural Gas). Refer to Table 3-1 for
additional information on this function.
1.3.18 Set Blower Speed During Purge
It is possible to experience failure to successfully ignite the system at startup, due to the inability
of the blower motor to slow down to the required rate following a pre ignition purge cycle.
A new entry, Purge Blwr Offst (Purge Blower Offset), has been added to the Factory Menu to
define the offset of full blower speed used for the pre-ignition purge cycle.
This will affect the 0-10v outputs.
The default value for the Purge Blwr Offst entry is 0.0. The setting range is 0.0 to 8.0.
NOTE
Purge Blwr Offst will NOT affect blower operation during
IGNITION or normal RUN operations.