26 | PIR Ready VT76x7 Series-Installation Guide
Pband
Proportional Band
setting
Default value
2
=
2.0 °F ( 0.6 °C )
Adjust the proportional band used by the Terminal Equipment
Controller PI control loop.
Note that the default value of 2.0 °F ( 1.1 °C ) gives
satisfactory operation in most normal installation cases. The use of
a superior proportional band different than the factory one is
normally warranted in applications where the Terminal Equipment
Controller location is problematic and leads to unwanted cycling of
the unit. A typical example is a wall mounted unit where the
Terminal Equipment Controller is installed between the return and
supply air feeds and is directly influenced by the supply air stream of
the unit.
Value
F scale Pband
C scale Pband
2
2 F
1.1 C
3
3 F
1.7 C
4
4 F
2.2 C
5
5 F
2.8 C
6
6 F
3.3 C
7
7 F
3.9 C
8
8 F
4.4 C
Anticycle
Minimum on/off
operation time for
stages
Default value =
2
minutes
Minimum On/Off operation time of cooling & heating stages.
IMPORTANT,
anti-short cycling can be set to 0 minutes for
equipment that posses their own anti cycling timer. Do not use this
value unless the equipment is equipped with such internal timer.
Failure to do so can damage the equipment.
0, 1, 2, 3, 4 & 5 minutes
Anti-short cycling can be set to 0 minutes for equipment that posses
their own anti cycling timer. Do not use that value unless the
equipment is equipped with such internal timer. Failure to do so can
damage the equipment.
