White Rodgers 2A20-2 Installation Manual download pdf

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS RD., ST. LOUIS, MO. 63123

(314) 577-1300, FAX (314) 577-1517

9999 HWY. 48, MARKHAM, ONT. L3P 3J3

(905) 475-4653, FAX (905) 475-4625

Printed in U.S.A.

INSTALLATION INSTRUCTIONS

DESCRIPTION

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY

BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE

PERSONAL INJURY AND/OR PROPERTY DAMAGE.

These explosion resisting thermostats are designed for control-

ling heating installations having hazardous atmospheres, such

as oil refinery, coal mine, flour mill, etc. They are designed for

line voltage operation, but may also be used as low voltage pilot

controls. White-Rodgers explosion resisting controls are avail-

able with either self-contained or remote sensitive bulbs.

The self-contained type is especially recommended for heating

installations of large air space.

The remote element type is applicable to installations such as

ducts, ovens or liquid baths.

PRECAUTIONS

EXPLOSION RESISTING CONTROLS

Heating Service

SPECIFICATIONS

THESE CONTROLS MUST BE INSTALLED BY A QUALIFIED

INSTALLER.

Do not exceed the specification ratings.

All wiring must conform to local and national electrical codes and

ordinances.

This control is a precision instrument, and should be handled

carefully. Rough handling or distorting components could cause

the control to malfunction.

This control has been accurately calibrated at the factory. Any

attempt to calibrate this control will void the White-Rodgers

warranty.

WARNING

Do not use on circuits exceeding specified voltage.

Higher voltage will damage control and could cause

shock or fire hazard.

CAUTION

To prevent electrical shock and/or equipment damage,

disconnect electric power to system at main fuse or

circuit breaker box until installation is complete.

Enclosure: Designed for Class I, Group D; Class II, Groups

E, F and G locations.

Electrical Opening: 1/2" pipe thread in bottom of enclosure.

Switch Action: S.P.S.T. – Open on Rise

Dimensions of Enclosure: 6-1/8" high

5-1/4" wide over lugs

4-5/8" deep over adjusting knob

WHITE-RODGERS

Operator: Save these instructions for future use!

PART NO. 37-1119B

Replaces 37-1119 & 37-9160

9551

1 2 3 4 5 6

Summary of Contents

Page 1 - WHITE-RODGERS

WHITE-RODGERS DIVISIONEMERSON ELECTRIC CO.9797 REAVIS RD., ST. LOUIS, MO. 63123(314) 577-1300, FAX (314) 577-15179999 HWY. 48, MARKHAM, ONT. L3P 3J3

Page 2 - SETTING THE CONTROL

2INSTALLATION OF REMOTE BULB TYPESOn controls with internal adjustment, the electric power must bedisconnected before removing the front cover to chan

Page 3 - SETTING THE CONTROL (CONT.)

3SETTING THE CONTROL (CONT.)CONTROLS WITH A FIXED DIFFERENTIALThe indicator (B) points to the temperature at which the contactsopen.To set the control

Page 4

WHITE-RODGERS DIVISIONEMERSON ELECTRIC CO.9797 REAVIS RD., ST. LOUIS, MO. 63123(314) 577-1300, TÉLÉCOPIEUR (314) 577-15179999 HWY. 48, MARKHAM, ONT.

Page 5 - RÉGLAGE DE LA COMMANDE

2INSTALLATION DES MODÈLES AVEC CAPTEUR À DISTANCEAprès avoir choisi un emplacement adéquat pour lacommande, détacher le couvercle en dévissant les 6 v

Page 6

3RÉGLAGE DE LA COMMANDE (suite)COMMANDES À DIFFÉRENTIEL RÉGLABLEL’indicateur mobile donne la température à laquelle lescontacts seront ouverts. L’indi

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White Rodgers 2A20-2 Installation Manual

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