D6
8-20-07
FAN COIL UNIT CONTROLS
Analog Electronic Controls
Variable Air Volume • EPIC Fan Technology
®
• ECM Motor
FEATURES:
• Proportional + Integral control action provides precise flow
and temperature control.
• Standalone operation.
• Pressure Independent fan operation ensures airflow settings
remain constant.
• Factory calibrated controls simplify field installation and
eliminate field balancing.
• Less costly than digital controls with no software
programming requirement.
• Suitable for all types and sizes of residential and commercial
building applications.
• Modern ergonomic, easy to use thermostat with large LCD
display for live temperature read-out and nine function keys.
• Nine programmable functions for Set-point. Maximum
Airflow, Minimum (deadband) Airflow, ºF/ ºC mode, Two
Unoccupied Modes (off and deadband mode), Proportional
Band, Integration Time and Temperature Offset adjustment.
Cooling Operation:
On a call for cooling, the chilled water valve will begin to
modulate open. As the cooling demand increases, the valve
will continue to open until the discharge air temperature
reaches 52ºF (11ºC). On a continued call for cooling, the fan
will begin to modulate toward the maximum cooling fan airflow
as the chilled water valve continues to modulate open
maintaining a 52ºF (11ºC) discharge air temperature. This
process will continue until the fan reaches the cooling
maximum airflow.
Deadband Operation:
With no demand in the space, there will be no call for heating
or cooling. The fan will be at minimum airflow. The chilled
water valve will be off. The hot water valve on the electric heat
will also be off.
Heating Operation:
On a call for heating, the fan will ramp up to the fan heating
setting and the first stage of heat will be energized. This may
be either an on/off hot water valve or a stage of electric heat.
Units with electric heat have an optional second stage
available. The fan may also be set to operate at a second
higher heating airflow setting. In the case of single stage
heating, it can be energized at either output. On a decrease in
heating demand, the sequence will reverse.
F DISCHARGE TEMP.
Standard Control Sequence ACN • Cooling and 1 or 2 Stage Heating
Off Unoccupied Mode:
The fan coil unit will be off. The heating set point will default to
50ºF (10ºC).
Deadband Unoccupied Mode:
In the unoccupied mode the fan will run at the preset minimum
fan set point. The room temperature set point will default to
70ºF (21ºC), the heating set point will default to 60ºF and the
cooling set point will default to 80ºF (27ºC).
CTE-5201W36 Analog LCD thermostat
CEE-5201 Analog controller
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