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Section 12:
Sequence of Operation:
DANGER
ELECTRICAL SHOCK HAZARD
Disconnect electric before service.
More than one disconnect switch
may be required to disconnect
electric from equipment.
Equipment must always be
properly grounded.
12.1 Unit Configuration
Based on the unit's application, the unit may be
configured in any number styles to achieve the described
functionality. Refer to the unit’s model number to see
which configuration the unit was supplied with.
12.2 Controls Options
Unit may be controlled in one of the following ways:
• Factory-mounted ALC controls (by factory)
• Factory-mounted DDC controls (by others)
• Factory-mounted terminal strip for field-mounted
• Factory-mounted terminal strip for electromechanical
controls (by factory or by others)
Unit Nomenclature Control Options:
A = ALC, Standard Program, DOAS
B = ALC, Standard Program, Recirculating
C = ALC, Standard Program, DOAS with LON
D = ALC, Standard Program, Recirculating with LON
E = Controls by Others, Factory Mounted
F = Terminal Strip, Controls Provided and Mounted by Others
G = Remote Thermostat
H = Compressor Lockout Thermostat
12.2.1 Factory-Mounted ALC Controls
(by factory)
The ALC control option consists of a factory programmed
controller and a series of factory-wired sensors. The
controller can operate in a 100% stand alone mode with
the use of a hand-held display. It can also connect to
a building automation system (BMS) using one of four
compatible protocols (BACnet®, LonWorks with the
optional Echelon card, Modbus, N2). The point mapping
to these protocols can be pre-set, so that the protocol and
baud rates desired can be easily field-selected without the
need for additional downloads or technician assistance.
Depending on the options ordered, remote sensors may
be installed and wired to the controller.
12.2.2 Factory-Mounted DDC Controls
(by others)
Field-supplied DDC controls are mounted by the factory
per the customer’s specifications.
12.2.3 Factory-Mounted Terminal Strip for
Field-Mounted DDC Controls (by others)
Field-supplied DDC controls can be connected to the
factory-mounted and factory-wired terminal strip.
12.2.4 Factory-Mounted Terminal Strip for
Remote Thermostat
(by factory or by others)
A factory-supplied or field-supplied thermostat can be
connected to the factory-mounted and factory wired
terminal. The 24V factory-supplied thermostat has the
following capabilities:
• Up to 4 heat/2 cool with humidity control -
for heat pump
• Up to 3 heat/2 cool with humidity control -
for straight cool
The thermostat features a 45-90 °F [7-32 °C] temperature
control range with a +/- 1 °F [0.5 °C] accuracy and are
capable of connecting to optional factory-supplied remote
indoor air and outdoor air temperature sensors.
Figure 16: Equipment Touch Display
RC/FC Series Installation, Operation, and Maintenance Manual