UE 400 Series - User Manual

To Next Page

IMT400-09

www.ueonline.com

400 Series

Temperature Controls

Types: B400, B402, B403, C400,

C402,C403, E400, E402, E403,

F400, F402, F403

UNITED ELECTRIC

CONTROLS

Installation and Maintenance

Instructions

Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of Recommended

Practices, Liabilities and Warranties.

IMT400-09

GENERAL

The 400 Series temperature switch utilizes either a liquid filled sensing stem

(immersion stem, direct mounting) or liquid filled sensing bulb (bulb &

capillary, remote mounting) to detect a temperature change. The response

at a predetermined set point(s) actuates one, two or three snap-acting

switches, converting the temperature signal into an electrical signal. Control

set point(s) may be varied by turning an internal calibrated pointer and

dial (B & E type) or internal adjustment screw (C & F) according to the

procedures outlined (See Part II – Adjustments)

THESE PRODUCTS DO NOT HAVE ANY FIELD REPLACEABLE PARTS.

MAXIMUM TEMPERATURE* STATED IN LITERATURE AND ON

NAMEPLATE MUST NEVER BE EXCEEDED, EVEN BY SURGES IN

THE SYSTEM. OCCASIONAL OPERATION OF UNIT UP TO MAX.

TEMPERATURE IS ACCEPTABLE (E.G., START-UP, TESTING). CONTINUOUS

OPERATION SHOULD BE RESTRICTED TO THE DESIGNATED ADJUSTABLE

RANGE.

*Maximum Temperatures - the highest temperature to which a sensing

element may be occasionally operated without adversely affecting set point

calibaration and repeatability.

Please refer to the product bulletins for product specifications. Product

bulletin may be found at www.ueonline.com

PART I - Installation

Tools Needed

Flathead Screwdriver

Hammer (for alternative wire knockouts)

Adjustable wrench

MOUNTING

ALWAYS LOCATE UNITS WHERE SHOCK, VIBRATION AND

TEMPERATURE FLUCTUATIONS ARE MINIMAL. DO NOT MOUNT UNIT

IN AMBIENT TEMPERATURES EXCEEDING PUBLISHED LIMITS.

400 SERIES TEMPERATURE CONTROLS CAN BE MOUNTED IN ANY

POSITION, PROVIDED THE ELECTRICAL CONDUIT IS NOT FACING UP.

THE PREFERRED MOUNTING POSITION IS VERTICAL (TEMPERATURE

CONNECTION FACING DOWN), SPECIFICALLY WHERE HEAVY CONDENSATION IS

EXPECTED.

For remote mounting, mount the unit via the (2) 1/4” screw clearance holes

on the enclosure (see dimensions). Fully immerse the bulb and 6” of capil-

lary in the control zone. It is generally desirable to place the bulb close to the

heating or cooling source in order to sense temperature fluctuations quickly.

Be sure to locate the bulb so that it will not be exposed to temperatures

beyond the instruments range limits.

ALWAYS HOLD A WRENCH ON THE IMMERSION STEM HEX WHEN

MOUNTING UNIT. DO NOT TIGHTEN BY TURNING ENCLOSURE. THIS

WILL DAMAGE SENSOR AND WEAKEN SOLDERED OR WELDED

JOINTS.

On models supplied with an external manual reset button, be sure to leave

sufficient finger space over the reset button for the operator to reset the

control.

WIRING

DISCONNECT ALL SUPPLY CIRCUITS BEFORE WIRING UNIT. WIRE

UNITS ACCORDING TO NATIONAL AND LOCAL ELECTRICAL CODES.

MAXIMUM RECOMMENDED WIRE SIZE IS 14 AWG. THE RECOM-

MENDED TIGHTENING TORQUE FOR FIELD WIRING TERMINALS IS 7 TO 17

IN-LBS.

ELECTRICAL RATINGS STATED IN LITERATURE AND ON NAMEPLATE

SHOULD NEVER BE EXCEEDED. OVER-LOAD ON A SWITCH CAN CAUSE

FAILURE ON THE FIRST CYCLE.

Remove the two screws retaining the cover and cover gasket, a 3/4” NPT E/C

is provided on the right of the enclosure in addition to the two (2) cast-in 7/8”

diameter knockouts for 1/2” electrical conduit that are located on the left side

and rear of the enclosure. These can easily be knocked out by placing the

blade of a screwdriver in the groove and tapping sharply with a hammer.

Connect conduit to the enclosure and wire directly to the switch terminals

according to local and national electrical codes. Bring the wires up to

terminals from the rear of the enclosure. (See Figure 1.) If manual reset

switch or DPDT options are used, lead wires are supplied, color coded as

follows:

Manual Reset Option 1530

(for 400)

Manual Reset Option 1530

(for 402)

Switch 1 Switch 1 Switch 2

C Violet Violet Yellow

NO Blue Blue Orange

NC Black Black Red

Need help?

Do you have a question about the UE 400 Series and is the answer not in the manual?

Summary

General Product Information

Product Limitations and Operating Limits

Information on field replaceable parts and maximum operating temperature limits.

Unit Mounting and Wiring Guidelines

Instructions for unit mounting, wiring, and electrical codes.

Installation Procedures

Mounting the Temperature Control

Guidance on locating and mounting the unit to minimize environmental impact.

Wiring the Temperature Control

Steps for connecting electrical wiring according to codes and specifications.

Manual Reset Option Operation

Explanation of how the manual reset switch functions and its setting requirement.

Adjustments and Calibration

Adjusting C400 & F400 Series

Procedure for adjusting temperature set points using internal screws.

Adjusting C402, C403, F402 & F403 Series

How to set switches individually or together, noting triple switch limitations.

Adjusting B400, B402, B403, E400, E402 & E403 Series

Calibration process using internal adjustment screws and zero adjustment screws.

Dimensional Drawings

Dimensions for B & C Models

Specifications and measurements for B & C series models.

Dimensions for E & F Models

Specifications and measurements for E & F series models.

Recommended Practices and Warranty

Best Practices and Safety Warnings

Crucial considerations for specifying, installing, and operating UE units safely.

Limited Warranty Details

Information regarding the seller's warranty for product defects.

Liability Limitations

Explanation of the seller's liability limits concerning product use and performance.