TAC AL-161-4 User Guide

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TAC

1354 Clifford Avenue P. O. Box 2940 Loves Park, IL 61132-2940 www.tac.com

Application

The AL-161-4 is a three-way air switching valve used for central supply air changeover in dual pressures systems.

Features

• Die cast aluminum actuator with replaceable

neoprene diaphragm

AL-161-4

Three-way Air Switching Valve

General Instructions

Applicable Literature

• TAC Cross-Reference Guide, F-23638

• TAC Reference Manual, F-21683

• TAC Application Manual, F-21335

• TAC Valve Products Catalog, F-27384

• EN-123 Air Quality Requirements for Pneumatic

HVAC Control Systems, F-22516

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SPECIFICATIONS

Valve Body Rating: 250 psig (1724 kPa). Actuator Maximum Air Pressure: 30 psig (207 kPa). Spring Range 8-13 psig (55-90 kPa). Flow Capacity: 25,920 scim (7,080 ml/s) at 15 psig (103 kPa) supply with 1 psig (6.9 kPa)

drop.

Connections:

Actuator, 1/8" FNPT.

Valve Body, 1/2" FNPT. Port Code and Flow Pattern: See Table-1. Ambient Temperature Limits:

Shipping & Storage, -40 to 220 ° F (-40 to 104° C).

Operating, 35 to 140° F (2 to 60° C). Humidity: 5 to 95% RH, non-condensing. Location: NEMA Type 1.

Table-1 Flow Pattern.

Stem Up

(No Air to Actuator)

Flow Closed Port Flow Closed Port

B to AB* A A to AB* B

*AB Common.

20 psig (138 kPa) Air to Actuator

Stem Down

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TYPICAL APPLICATIONS

INSTALLATION

Inspection

Requirements

Electric Time

L1 L2

AL-1XX

Switch

Contacts Open: Contacts Closed:

Inspect the package for damage. If damaged, notify the appropriate carrier immediately. If undamaged, open the package and inspect the device for obvious damage. Return damaged products.

Solenoid Air Valve

(E/P Relay)

20 psig to Thermostats 15 psig to Thermostats

Figure-1 Typical Piping Diagram.

N.C.

N.O.

15 psi

(103 kPa)

AL-161-4

AAB

20 psi

(138 kPa)

Pressure

Gauge

0-30 psig

Supply Main to

Thermostats

• Job piping diagrams

• Tools (not provided):

– Appropriate drill and drill bit for mounting screws

– Appropriate screw drivers and wrenches

• Mounting screws (not provided)

• Training: Installer must be a qualified, experienced technician



W A R N I N G

• Disconnect the power supply (line power) before installation to prevent equipment damage.

• Make all connections in accordance with the piping diagram

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C A U T I O N

• Do not exceed the ratings of the device(s).

• Avoid locations where excessive moisture, corrosive fumes, or vibration is present.

• Do not install insulation on any part of the actuator.

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Mounting

Piping

CHECKOUT

MAINTENANCE

FIELD REPAIR

DIMENSIONAL DATA

The AL-161-4 is not position sensitive.

1. Mount the AL-161-4 to the wall or the subpanel of a control cabinet at any angle, using the attached mounting bracket.

2. Use three (3) 1/4" (6 mm) mounting screws (not provided) to secure the AL-161-4 to the mounting surface.

3. See Figure-2 for mounting dimensions.

Refer to the typical piping application in Figure-1.

With no air to the actuator the flow will be from ports B to AB. Apply 20 psig (38 kPa) to the actuator; the flow will be from ports A to AB.

Regular maintenance of the total system is recommended for sustained optimum performance. For information on air quality requirements consult EN-123, Air Quality Requirements for Pneumatic HVAC Control Systems, F-22516.

Use part number PNV-102-1 when the replacement of the actuator diaphragm is necessary.

See Figure-2 for dimensional data.

3-1/2

(89)

Mounting Slot

9/32 (7) dia.

4-13/16

(122)

1-1/4

(32)

4-5/8 (117)

2-1/2

(64)

(76)

1-1/4

(32)

Mounting

Slots

1-1/8

(29)

9/32 (7) dia.

1-5/8

(41)

7/8 (22)

Allow 3" (76 mm) clearance above assembly for actuator removal.

Dimensions in inches. ( ) mm.

Figure-2 AL-161-4 Air Switching Valve Dimensions.

2-13/16

(71)

2-1/4

(57)

1-11/16

(43)

3-5/8

(92)

6-1/16

(154)

1-15/32

(37)

F-21286-3

TAC

1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940

www.tac.com