Honeywell PVL4022AS User Manual

5

62-0287—03

The controller enclosure is constructed of a plastic base plate 

and a plastic factory-snap-on cover. 

NOTE: The controller is designed so that the cover does not 

need to be removed from the base plate for either 

mounting or wiring.

The controller mounts using four screws inserted through the 

corners of the base plate. Fasten securely with four No. 6 or 

No. 8 machine or sheet metal screws.

The controller can be mounted in any orientation. Ventilation 

openings are designed into the cover to allow proper heat 

dissipation, regardless of the mounting orientation.

To mount  the PUL1012S, PUL4024S, PUL6438S, 

PVL4024NS, or PVL6438NS controller on a DIN rail [standard 

EN50022; 1-3/8 in. x 9/32 in. (7.5 mm x 35 mm)], refer to 

Fig. 8 and perform the following steps:

1. Holding the controller with its top tilted in towards the 

DIN rail, hook the two top tabs on the back of the con-

troller onto the top of the DIN rail.

2. Push down and in to snap the two bottom flex connec-

tors of the controller onto the DIN rail.

For PVL0000AS, PVL4022AS, PVL4024NS, PVL6436AS, and 

PVL6438NS, connect the air flow pickup to the two restrictor 

ports on the controller (see Fig. 9).

NOTES:

—

Use 1/4 inch (6 mm) outside diameter, with a 

0.040 in. (1 mm) wall thickness, plenum-rated 

1219 FR (94V-2) tubing.

—

Always use a fresh cut on the end of the tubing 

that connects to the air flow pickups and the 

restrictor ports on the controller.

Connect the high pressure or upstream tube to the plastic 

restrictor port labeled (

+

), and the low pressure or 

downstream tube to the restrictor port labeled (

-

). See labeling 

in Fig. 9. When twin tubing is used from the pickup, split the 

pickup tubing a short length to accommodate the connections.

NOTES:

—

If controllers are mounted in unusually dusty or 

dirty environments, an inline, 5-micron disposable 

air filter (use 5-micron filters compatible with 

pneumatic controls) is recommended for the high 

pressure line (marked as 

+

) connected to the air 

flow pickup.

—

The tubing from the air flow pickup to the control-

ler should not exceed three feet (0.914 m). Any 

length greater than this will degrade the flow 

sensing accuracy.

—

Use caution when removing tubing from a con-

nector. Always pull straight away from the con-

nector or use diagonal cutters to cut the edge of 

the tubing attached to the connector. Never 

remove by pulling at an angle.

All wiring must comply with applicable electrical codes and 

ordinances, or as specified on installation wiring diagrams. 

Controller wiring is terminated to the screw terminal blocks 

located on the top and the bottom of the device.

Disconnect power supply before beginning wiring or 

making wiring connections, to prevent electrical shock 

or equipment damage.

DIN RAIL

TOP TABS

BOTTOM FLEX

CONNECTORS

M16815

M23556A

AIR FLOW 

PICKUP 

Δ

P 

1 2 3 4 5 6 7 8 

1 

0 

9 

2 3 4 5 6 7 8  0 

9 

1 

1  1 1 1 1 1 1 1  2 

1 

1 2 3 4 5 6 7 8  0 

9 

2 

2 2 

2 2 2 2 2 2  3 

3 

1 2 3 4 5 6 7 8  0 

9 

3 

3 

3 

3 3 

3 3 

3 4 

RESTRICTOR 

PORT 

RESTRICTOR 

PORT 

CONNECTOR 

TUBING