Viconics VT7225 series User Manual

6 | 028-6145-00 November 2017
CONFIGURATION
PARAMETERS
DEFAULT VALUE
SIGNIFICANCE AND ADJUSTMENTS
Unocc HT
Default value = 62°F (17°C)
Unoccupied heating setpoint
Range is: 0 to 180 °F (-17 to 82 °C)
Heat max
Default value = 90°F (32°C)
Maximum occupied & unoccupied heating setpoint
adjustment.
Range: 0 to 180°F (-17.0 to 82°C)
Heat min
Default value = 54°F (12 °C)
Minimum occupied & unoccupied cooling setpoint
adjustment. Heating setpoint range is:
0 to 180°F (-17.0 to 82°C)
Note: Heat max has priority over Heat min value.
Pband
Default: 3
Adjust the proportional band used by the Room Controller
PI control loop.
Note that the default value of 3.0°F (1.2 °C) gives
satisfactory operation in most normal installation cases.
The use of a proportional band different than the factory
one is normally warranted in applications where the Room
Controller location is problematic and leads to unwanted
cycling of the unit. A typical example is a wall mounted unit
where the Room Controller is installed between the return
and supply air feeds and is directly influenced by the supply
air stream of the unit.
Note: When a supply sensor is connected to UI3, this
parameter is not used. The internal proportional band is
fixed at 50 °F (27 °C).
VALUE
°F SCALE PBAND
°C SCALE
PBAND
3
3 F
1.2 C
4
4 F
1.7 C
5
5 F
2.2 C
6
6 F
2.8 C
7
7 F
3.3 C
8
8 F
3.9 C
9
9 F
5.0 C
10
10 F
5.6 C
Set Type
Default: Permnent
Temporar: (temporary) Local changes to the heating or
cooling setpoints by the user are temporary. They will
remain effective for the duration specified by “ToccTime”.
Setpoints will then revert back to their default value after
internal timer “ToccTime” expires.
Permnent: (permanent) Any change of occupied or
unoccupied setpoints through the keypad by the user are
permanent and saved to & EEPROM

Viconics VT7225 series Specifications

General

Brand	Viconics
Model	VT7225 series
Category	Controller
Language	English