AERCO C-More Controls - Manual (Page 5)

C-MORE CONTROL PANEL OPERATION
SECTION 1 -
GENERAL INFORMATION
1.1 INTRODUCTION
The information in this Section provides a guide
to the operation of KC and Benchmark Series
units using the C-More Control Panel. In
addition, it provides information describing the
numerous types of external sensors and control
devices which can be interfaced to the unit using
terminals provided in the Input/Output (I/O) Box
utilized with the Control Panel. Information
regarding the set up of all Water Heater and
Boiler Operating Modes is also included herein.
1.2 SAFETY PRECAUTIONS AND
WARNINGS
It is imperative that the initial startup of KC and
Benchmark Series units be performed by factory
trained personnel. Operation prior to initial
startup by factory trained personnel will void the
equipment warranty. In addition, the following
WARNINGS and CAUTIONS must be observed
at all times.
CAUTION:
All initial installation procedures must be
satisfied before attempting to start the unit.
WARNING:
ELECTRICAL VOLTAGES IN KC SERIES
UNITS INCLUDE 120 AND 24 VOLTS AC.
VOLTAGES IN BENCHMARK SERIES UNITS
MAY ALSO INCLUDE 460 AND 220 VOLTS
AC. THEREFORE, THESE UNITS MUST BE
SERVICED ONLY BY FACTORY CERTIFIED
SERVICE TECHNICIANS.
WARNING:
DO NOT ATTEMPT TO DRY FIRE THE
UNIT. STARTING THE UNIT WITHOUT A
FULL WATER LEVEL CAN SERIOUSLY
DAMAGE THE UNIT AND MAY RESULT IN
PERSONNEL INJURY OR PROPERTY
DAMAGE. THIS SITUATION WILL VOID ANY
WARRANTY.
1.3
with
limit how low the
1.3.4
FEATURES AND BENEFITS
KC and Benchmark Series units equipped
the new C-More Control Panel include a number
of additional features and benefits. These
include:
1.3.1 System Start Temperature
The Sy tem Start Temperature feature s 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
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
BMS 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