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100

R435 (2374-401)

Air Motion Relay

Model Chart

Specifications

Accessories

This relay is used to sense suction and/or

discharge pressures across a coil or fan and

control pneumatic damper actuators or valves

piped downstream from this device. By the use of

sensing lines located at a fan suction and

discharge and piped to the low and high ports of

this relay, this device is able to detect whether or

not a fan is operating. This same operation can

also be detected by using one port of the R435 as a

reference port and piping the other port to the fan

suction or discharge providing there is a

differential pressure of at least 0.15 in. W.C.

Features:

• Useful for proving fan-operation pneumatically, without the

use of electrical devices.

• Originally designed for use with Unit-Ventilators, the R435

may be used to operate diverting relays (such as the R504

Series) for Air-Handling Unit Control Systems.

Model No.

Wholesale

Model No.

Description

R435 2374-401 Air Motion Relay.

Pressure output 3 to 15 psig (21 to 103 kPa).

Pressure input Minimum 0.15 in. W.C.(373 Pa) differential.

Environment

Maximum ambient temperature 140qF (60qC).

Locations Avoid areas with excessive vibration or corrosive materials.

Supply air pressure Clean, dry, oil free air required (refer. EN-123).

Nominal 20 psig (103 kPa).

Maximum 30 psig (207 kPa).

Connections

LO/HI Ports 3/8 in. O.D. plastic tubing.

Signal 1/4 in. O.D. plastic tubing.

Maximum static pressure 12 in. W.C. (2988 Pa).

Main air consumption 27.6 scim (7.5 mL/s).

Air capacity 48 scim. (13.1 mL/s).

Mounting Transmitter must be mounted in a horizontal position with the correct side up.

Dimensions 5-9/16 H x 5-5/16 W x 2-11/16 D in. (141 x 135 x 69 mm).

Weight 0.5 lb. (227 g).

Model No. Description

AP-302 Static pressure tip — 1/4 in. O.D. tubing.

AP-305 Static pressure tip — 1/8 in. pipe thread.

R435

(2374-