Install Instructions

28 | PIR Ready VT7600 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.
Heat cph
Heating stages cycles
per hour
Default value = 4
C.P.H.
Will set the maximum number of heating stage cycles per hour
under normal control operation. It represents the maximum
number of cycles that the equipment will turn ON and OFF in one
hour.
Note that a higher C.P.H will represent a higher accuracy of control
at the expense of wearing mechanical components faster.
3, 4, 5, 6,7 & 8 C.P.H.
For multi stage models, heat cph applies to W1 & W2
For heat pump models, heat cph applies to W1 only
(Emergency heat )