Chromalox WR-80EP Инструкции по установке и эксплуатации - Страница 2

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WARNING: Hazard of Electric Shock. Disconnect all

power before wiring or servicing this control.

1. After a suitable location has been chosen for the control,

remove the front cover by using a

(furnished with control) in the 6 cover screws.

2. Electric wiring to heater must be installed in accordance with

National Electrical Code and with local codes. WARNING:

Use copper conductors only.

3. Entrance for wiring is provided by one

bottom of the housing. Wiring to control housing must be in

rigid conduit also in accordance with National Electrical Codes

(NEC) for hazardous locations. (See Figure 2)

4. Connect wires according to wiring diagrams (Figures 3 and 4).

Note: Electrical connections should be made with generous

loops of wire – approximately 6" per lead.

Note: If load amperage or voltage rating exceeds switch rating,

a contactor must be used. Contactor and wiring to be supplied

by customer. (See Figure 4)

Figure 3 — Single phase loads when load does not exceed

rating of thermostat.

WARNING: Hazard of Electric Shock. Extreme care

should be exercised during calibration adjustments

because of shock hazard due to exposed electrical

terminals.

DANGER: Calibration will involve exposure of inter-

nal control terminals to ambient conditions during

some

part

the

Combustible materials which cause hazardous

conditions must not be present during recalibra-

tion process – otherwise explosion may result.

WR-80EP thermostats are accurately calibrated at the factory

so the dial setting correctly indicates the temperature at which the

contacts open on temperature rise. If, as a result of damage in tran-

" Allen Head Wrench,

-14 NPT hole in the

Ground

CALIBRATION

recalibration

procedure.

Please refer to the Chromalox limited warranty applicable to this product at

http://www.chromalox.com/customer-service/policies/termsofsale.aspx.

1347 HEIL QUAKER BLVD., LAVERGNE, TN 37086

Phone: (615) 793-3900

WIRING

Replacing Cover

1. Set the internal dial and the external dial to the same setting so

that the hole in the dial lines up with pin on the arm that is

operated by the knob. (See Figure 2)

2. Replace 6 cover screws and tighten with Allen Wrench provided.

Fixed

Indicator

Figure 2

Figure 4 — Single phase loads when load exceeds rating of thermostat and three

phase loads.

sit or for other reasons the room temperature differs appreciably

from the dial setting, the calibration may be adjusted as follows:

1. Note temperature on the thermometer.

2. Set dial at highest temperature.

3. Turn dial slowly to lower temperature and stop when thermo-

stat contacts open.

4. Remove cover using the

wiring.

5. Loosen two dial screws (Figure 2). Carefully turn the dial only

to correct temperature setting as indicated by thermometer. Be

sure the thermostat shaft is not moved during this operation.

6. Tighten the dial screws and replace thermostat cover. (See

"Replacing Cover")

Limited Warranty:

www.chromalox.com

Ground

Electrical

Connections

-14

N.P.T. Thread

Ground

" Allen Head Wrench as in #1