Hydronic Controller Input And Output Information; Window Open; Unoccupied Mode; Frost Protection - Honeywell WebVision User Manual

Heat and cool sequences can be selected to be active or not
active, giving a total of four different sequence options:
• Heat only
• Cool only
• Heat/cool changeover
• Heat and cool sequence
Modes Of Operation
The controller has the following modes of operation.
Occupied mode
This is the normal operating condition for a room or zone
when it is occupied. The controller can be switched into this
mode by a network command, by the room occupancy sensor,
or by a bypass button on the wall module.
Standby mode
The standby mode saves energy by reducing heating or
cooling demand during periods where the room is temporarily
unoccupied.
Inputs
Outputs Description
Inputs Digital Window/occupancy/
changeover/
air flow/condensation
Override
Analog Temperature Sensor
Setpoint Adjustment
Outputs Digital Override LED
Triac (2pais) Heat and Cool
HYD Outputs
Description
HYD applications can have a variable number of heating and
cooling stages. The number of pipes used on the unit could be
two or four. The outputs could be of staged, PWM, floating, or
Thermal type. In addition the outputs can be of Change over
mode.
Purpose
Define the operation of the hydronic controller outputs and the
type of equipment to be controlled.
Table 42. Hydronic Controller Input and Output Information.
PIN
Function Number
4
7
9
8
6
14, 15, 17, 18 24 Vac; 250 mA max continuous; 650 mA max surge (<=30 sec)

Unoccupied mode

This mode is used for longer unoccupied periods, such as at
night or during weekends and holidays.

Window open

If the controller is configured for window open detection, the
controller automatically disables heat and cool control until the
window is closed again. Frost protection remains active.

Frost protection

If the temperature drops below 46 ºF (8 ºC), the controller
enables the heating circuit as frost protection.
Fan fail
When configured with an air flow detector, the controller
protects equipment by disabling the system when the fan fails
(for fan coil units with manual fan speed control).
Changeover
The controller operates two-pipe units configured with a
changeover input.
HYD Inputs/Outputs
Closed<=400 ohm; open>=10K ohm
Closed<=400 ohm; open>=3.3k ohm
20K ohm NTC (25 °C)
10k Ohm
ON: 5 Vdc, 10 mA.
OFF: 0 Vdc, <1 mA
Mode
Configuration can be performed with the wizard Off-line or
On-line.
Procedure
1. Click the Outputs button on the left pane to open the
Output Configuration page.
2. Enter information into available fields.
3. Click Commit to save the settings or Reset to revert to
the last saved settings.
4. Click Next to display the Input Configuration page.
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WEBVISION™
Characteristics
95-7769—01