AERCO C-More Controls - Manual (Page 6)

C-MORE CONTROL PANEL OPERATION
Temp Hi Limit
mperature limit featur
1.3.5 Max Fire Rate
user to limit the unit’s
1.3.6 Pump Delay Timer
llows the user to
1.3.7 Aux Start On Delay
feature works in
1.3.8
Failsafe Mode
the user to select
1.3.9 RS232 Monitoring
mputer or other
1.3.10 Aux Temp
temperature sensor to be
1.4 CONTROL PANEL DESCRIPTION
wo
The Temp Hi Limit is a te e The F
that will shut down the unit and generate an
alarm if the if the outlet temperature exceeds its
setting. It is preset at 210°F, however it is
adjustable from 40°F to 240°F.
This feature allows the
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.
firing rate. 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.
The C-More control system a
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.
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.
The AUX START ON DELAY
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.
ailsafe mode allows
This feature allows a laptop co
This feature permits a
connected to the Aux Sensor In terminals in the
I/O Box. The sensor must be within the
resistance range used with the C-More Control
system. It can be used to monitor the user’s
parameter of choice. This feature is always
enabled. This is strictly a monitoring function
and plays no role in control of the unit.
The C-More Control Panel is available in t
models. One model has a horizontal panel
control layout as shown in Figure 1-1A and is
used on KC Series units. The other model has a
vertical panel control layout as shown in Figure
1-1B and is used on Benchmark Series units.
These models contain identical controls,
indicators and displays and are functionally
identical. These controls, indicators and displays
are listed and described in Table 1-1.
2