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Johnson Controls P-3800 Reset Volume Controller

Reset Volume Controller
P-3800

The P-3800 Reset Volume Controller regulates the flow of air in Variable Air Volume (VAV) boxes. The P-3800 controls the output volume, between adjustable minimum and maximum limits, in response to a reset signal from a thermostat or some other master controller. The P-3800 is available in two models.

• fully adjustable - reset start point - reset range - minimum and maximum flow set points
• provides controllable flow down to 0.01 in. WG velocity pressure
• reset range adjustable 0.15 to 1.6 in. WG
• isolated diaphragm design accepts any sensing line
• fits most competitors’ mounting brackets
• provided with barbed fittings on all ports
• includes a replaceable filter/orifice assembly
• constant reset span

Select a link under the "item" tab below to order.

Cat #hermostatConfiguration.
P-3800-1Direct ActingDADR
P-3800-1Reverse ActingRARR
P-3800-2Reverse ActingDARR
P-3800-2Direct ActingRADR
Control Pressure 1 to 20 psig (7 to 138 kPa)
Set Point Adjustable 3 to 18 psig (21 to 124 kPa)
Accuracy ±1 PSI (±7 kPa)
Maximum System (In) Pressure 10 in. WG
Ambient Temperature Limits -20 to 140°F (-30 to 60°C)
Connections Barbed Fitting for 1/4 in. O.D. Polyethylene Tubing
Barbed Fitting for 5/32 or 1/4 in. O.D. Polyethylene Tubing
Mounting Bracket Supplied


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