Each controller is programmable because the user
chooses which function blocks to use and how to connect
them. It is configurable because each Function Block has
user-defined behavior.
The PVB6436AS and PVB6438NS models are Variable Air
Volume (VAV) controllers, and the PUB6438S and
PUB6438SR models are Unitary controllers.
VAV Equipment Control
(PVB0000AS, PVB4022AS,
PVB4024NS, PVB6436AS, and
PVB6438NS)
The VAV controllers provide pressure-independent air flow
control and pressure-dependent damper control. VAV
systems generally provide cool air only to zones. However,
each controller has additional programmable inputs and
outputs that may be used to control devices, such as a fan
or VAV box reheat coils. Heaters can be staged electric or
modulating hot water. Supply and exhaust pressurization
control are provided on a zone basis.
Unitary Equipment Control
(PUB1012S, PUB4024S, PUB6438S,
and PUB6438SR)
Unitary equipment includes natural convection units,
radiant panels, unit heaters, unit ventilators, fan coil units,
and heat pumps. Unitary equipment does not require a
central fan. Depending on design, unitary equipment may
perform one or all of the functions of HVAC—ventilation,
filtration, heating, cooling, humidification and
distribution. Unitary equipment frequently requires a
distribution system for steam or hot and or chilled water.
SPECIFICATIONS
Electrical
Rated Voltage: 20-30 Vac; 50/60 Hz
Power Consumption:
100 VA for controller and all connected loads (including
the actuator on model PVB6436AS)
Controller only Load: 5 VA maximum; models PVB6438NS,
PUB6438S, and PUB6438SR
Controller and Actuator Load: 9 VA maximum; model
PVB6436AS
External Sensors Power Output: 20 Vdc ±10% @ 75 mA
maximum
