Chromalox WCRT-100 Installations- und Betriebsanleitung

Blättern Sie online oder laden Sie pdf Installations- und Betriebsanleitung für Thermostat Chromalox WCRT-100 herunter. Chromalox WCRT-100 4 Seiten. Weather-corrosion resistant room thermostat

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Type WCRT thermostats are intended for use in harsh environ-

ments. They tolerate continuous spraying with water, high humid-

ity, airborne contaminates and moderately corrosive conditions.

The nickel plated sensing bulb is attached directly to the bottom of

the case where it is shielded from damage or accumulations of

insulating particles. The molded Noryl case is sealed at the cover

with a neoprene gasket and the adjusting knob opening is closed

with a lubricated O ring. Underwriters Laboratories has tested the

WCRT and found it meets the requirement for NEMA 4X areas.

High levels of accuracy and sensitivity, 2

vided by the WCRT. Switching is done by heavy duty, precision,

single stage, SPDT line voltage snap action switch. Setting is

accomplished by rotating the adjusting knob. The dial face is print-

ed with large, contrasting numbers and letters on a lustrous back-

ground for good visibility. Color coding clearly identifies the func-

tion of each conductor.

Applications – Automatically controls room temperature by turn-

ing electric air heaters on and off. Can be used to control the air

heaters directly, within thermostat rating. For higher ratings use

thermostat with magnetic contactor. Place thermostat on inside wall,

away from undue heating or cooling influences, about 4 feet above

the floor.

Installation

and

OPERATION INSTRUCTIONS

UL LISTED

Figure 1

° differential, are pro-

WCRT Weather-Corrosion

Resistant Room

Thermostat

Specifications – Table A

Temperature Switch

Model

Range (°F)

Action

WCRT-100

40-100

SPDT

GENERAL

NOTICE: Type WCRT thermostats are designed for temperature

control service only. Because they do not fail safe, they should

not be used for temperature limiting duty.

W W A A R R N N I I N N G G : : Users should install adequate back-up

controls and safety devices with their electric heat-

ing equipment. Where the consequences of failure

may be severe, back-up controls are essential.

Although the safety of the installation is the

responsibility of the user, Chromalox will be

glad to make equipment recommendations.

Principle of Operation – Control action of these thermostats is

provided through the principle of liquid volume change. With a

variation in temperature, the liquid in the sensing element expands

or contracts, causing a bellows to actuate the switching mechanism.

WARNING: Not for use in hazardous environments as

described in National Electrical Code. Failure to com-

ply can result in explosion or fire.

LO Setting is positive open (black to red) for heating loads and

is positive closed (black to blue) for cooling loads.

Note: It is not recommended to switch systems directly from heat-

ing to cooling and vice versa.

WCRT

(Supersedes PK471-3)

161-562767-001

DECEMBER, 1998

Maximum Rating

Description

120 Vac

Full Load Inductive

16.0A

Locked Rotor

80.0A

Non-Inductive

25.0A

Pilot Duty

125VA

PK471-4

240 Vac

277 Vac

12.0A

10.0A

60.0A

55.0A

25.0A

22.0A

125VA