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VAV-PRC011M-EN 135

Controls Specifications

returns the system to unoccupied mode. The digital display zone sensor requires seven wires, one

for 24-VAC power.

Pneumatic Controls

Normally-Open Actuator

Pneumatic 3 to 8 psig (20 to 55 kPa) spring-range pneumatic actuator.

Normally-Closed Actuator

Pneumatic 8 to 13 psig (55 to 90 kPa) spring-range pneumatic actuator.

3011 Pneumatic Volume Regulator (PVR)

The regulator is a thermostat reset velocity controller, which provides consistent air delivery within

5% of cataloged flow down to 15% of unit cataloged cfm, independent of changes in system static

pressure. Factory-calibrated, field-adjustable setpoints for minimum and maximum flows.

Average total unit bleed rate, excluding thermostat, is 28.8 scim at 20 psig (7.87 mL/min at 138 kPa)

supply.

3501 Pneumatic Volume Regulator (PVR)

The 3501 regulator is a linear-reset volume controller. This PVR is used to maintain a constant

volume of airflow from the dual-duct unit when constant volume control is used. Average total unit

bleed rate, excluding thermostat, is 43.2 scim at 20 psig (11.8 mL/min at 138 kPa) supply.

Considerations for Pneumatic Thermostat

Field-supplied and -installed based on chosen control options, a direct-acting or a reverse- acting,

one-pipe or two-pipe pneumatic room thermostat will control the available air valve, reheat and

fan switch to maintain room temperature setpoint. The following pneumatic control features are

available with VariTrane terminal units:

• Controls Option – PN00: Cooling with Normally-Open damper and actuator only (Reverse-

Acting Thermostat)

• Controls Option – PN04: Cooling with hot water reheat, Normally-Open damper, 3011 PVR

(Direct-Acting Thermostat)

• Controls Option – PN05: Cooling with electric reheat, Normally-Open damper, 3011 PVR

(Reverse-Acting Thermostat)

• Controls Option – PN08: Cooling and Heating, Normally-Open dampers, actuators only

(Reverse-Acting Thermostat)

• Controls Option – PN09: Cooling and Heating, Normally-Open dampers, 3011 PVR’s (Direct-

Acting Thermostat)

• Controls Option – PN10: Cooling and Heating, Normally-Open dampers, 3501 PVR’s, Dual-Duct

Constant Volume (Direct-Acting Thermostat)

• Controls Option – PN11: Cooling with hot water reheat, Normally-Open damper, 3011 PVR - Auto

Dual Minimum (Direct-Acting Thermostat) (N.O. Water Valve)

• Controls Option – PN32: Cooling with hot water reheat, Normally-Open damper, 3011 PVR -

Constant Volume (Direct-Acting Thermostat)

• Controls Option – PN34: Cooling with electric reheat, Normally-Open damper, 3011 PVR -

Constant Volume (Reverse-Acting Thermostat)

• Controls Option – PN51: Cooling with reheat, Normally-Open damper, 3011 PVR Duct Pressure

Switch (Reverse-Acting Thermostat)

• Controls Option – PN52: Cooling with reheat, Normally-Open damper, 3011 PVR - Dual Pressure

Minimum (Reverse-Acting Thermostat)

• Controls Option – PC00: Cooling Only with Normally-Closed damper - Direct-Acting Thermostat

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