CBV-2U4-3T(-N) |
Control Sequence Overview
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HEATING CONTROL
TERMINAL UNIT HEAT
The
CBV-2U4-3T(-N)
has 3 Digital Outputs (DO) to control both fan or heat stages and 2 Analog Outputs (AO)
to control modulating heat or fans. A tri-state heating valve may be configured using
DO-11
and
DO-12
.
On/Off Control
The
CBV-2U4-3T(-N)
may control on/off stages of electric terminal heat. On a fall in zone temperature below
the controller heating setpoint, the
CBV-2U4-3T(-N)
controller will energize the heat stages in sequence from
lowest output number to highest.
When using stages of Electric Heat without a fan, parameters are available to disable electric heat until
airflow reaches a Flowrate setpoint
(A3). Flowrate must stay above
(A3) for the amount of time set in
enabled.
•
(A3) R/W
•
(A112)
•
Modulating Control
The
CBV-2U4-3T(-N)
may control modulating terminal heat. On a fall in zone temperature below the controller
heating setpoint, the
CBV-2U4-3T(-N)
controller will modulate the hot water valve open. Various voltage
ranges and direct or reverse action are available.
Note:
If the
CBV-2U4-3T(-N)
has been configured for a series or parallel fan, heat will not be energized until the fan
has been commanded on.
BASEBOARD HEAT
The
CBV-2U4-3T(-N)
control outputs not being used for terminal unit heat may be used for baseboard heat.
Like terminal unit heat, these may be either analog or digital outputs, depending on what type of point is
available.
In the occupied mode, the baseboard heat will be controlled in sequence with any terminal unit heat.
In the unoccupied mode, the baseboard heat may be configured to operate either in sequence with terminal
unit heat or as the only source of heat.
On/Off Control
If DO point(s) are available, the
CBV-2U4-3T(-N)
may control on/off baseboard heat. On a fall in zone
temperature below the controller heating setpoint, the
CBV-2U4-3T(-N)
controller will energize the
associated baseboard heat.
Modulating Control
If AO or tri-state point(s) are available, the
CBV-2U4-3T(-N)
may control modulating baseboard heat. On a fall
in zone temperature below the controller heating setpoint, the
CBV-2U4-3T(-N)
controller will modulate the
associated baseboard section hot water valve.
Run Only Baseboard heat during unoccupied
Содержание CBV-2U4-3T
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