AERCO C-More Controls Manual June 2010 - Manual (Page 9)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
04/22/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 Page 9 of 162
OMM-0032_0E Phone: 800-526-0288 GF-112
1.3.8 Failsafe Mode
The Failsafe mode allows the user to select whether the unit shuts down or switches to the
Constant Setpoint mode of operation in the event that a loss of signal causes the unit to become
inoperable. For example, if a 4 to 20 mA Remote Setpoint signal is being sent, but is not seen
by the unit, the unit will shut down or automatically switch to the Constant Setpoint mode and
work off the unit’s internal setpoint. The default setting for this option is Shutdown.
1.3.9 RS232 Monitoring
This feature allows a laptop computer or other suitable device to be connected to the RS232
port on the Control Panel front panel. This permits the unit to be monitored either locally or
remotely via a Modem.
1.3.10 Password Entry
A simplified password entry feature allows the user to enter passwords one digit at a time,
starting with the most significant digit (MSD). This eliminates the long and tedious process of
holding down the ▲ or ▼ arrow key until the full password (3 or 4 digits) appears in the display.
Refer to Table 3-1 for additional information.
NOTE
See Table 1-1 for a Feature Compatibility Chart associated with a
number of the following features.
1.3.11 Ignition Retry Functions
It is now possible to successfully ignite the system following a momentary spurious fault
condition. To aid in the unattended recovery from this type of spurious incident, the following
Ignition Retry functions have been implemented:
• Air Flow Fault During Purge
• Flame Loss During Run
Refer to paragraphs 4.2.1 and 4.2.2 for additional information.
1.3.12 Fire Rate (FR) Change Rate
The FR Change Rate defines the rate at which the Fire Rate will increase or decrease. The
purpose of slowing down the fire rate velocity when decreasing is to prevent flameouts caused
by the inability of the blower motor to slow down in proportion to a rapid fire rate decrease.
When decreasing the fire rate during operation above 30% Valve Position, the rate will decrease
at the standard 0.5 seconds per 1% Valve Position. When operating at or below 30% Valve
Position, the slow-down feature is enabled and the Fire Rate will decrease at the rate defined by
the FR Change Rate value set in the Factory Menu. The rate can be Factory-set from 0.5 to 60
seconds per 1% Fire Rate (default = 1.5 seconds per 1% Valve Position).
The FR Change Rate feature is always enabled for Boilers. However, this feature is not active
for Water Heaters.
1.3.13 PID Correction Deadband
The PID Correction Deadband allows the Outlet Temperature to drift within a temperature range
defined by Setpoint, Deadband High and Deadband Low.
Allowing the Outlet Temperature to drift from the Setpoint Temperature minimizes Air Fuel Valve
corrections when deemed unnecessary.