Chromalox PK407-4 Installation, Betrieb und Erneuerung Identifizierung der Teile - Seite 3

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ELECTRIC SHOCK HAZARD. Disconect all power to

heater before installing or servicing thermostat.

Failure to do so could result in personal injury or

property damage. Thermostat must be installed by a

qualified person in accordance with the National

Electrical Code, NFPA 70.

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

local and National Electrical Codes.

CAUTION: Use copper conductors only.

2. Entrance for wiring is provided by two

of base plate.

3. If control is a "KC" model (Knob Cover), remove knob cover

as in Figure 5.

4. Set thermostat knob to OFF position and then remove knob by

lifting knob from shaft. (See Figure 6)

5. Loosen two screws from end of base plate and remove ther-

mostat cover (see Figure 7).

Figure 8 — Three-Phase "Y" Load

Note: One line (terminals 5-6) is controlled by the dial and is on continually whenever the dial is moved from the off position. The other

two lines are thermostatically controlled and cycle with the rise or fall in temperature.

Figure 10

ELECTRIC SHOCK HAZARD. Disconnect all power

before attempting to calibrate thermostat. Failure

to comply could result in personal injury.

These controls are factory calibrated to the range indicated on

the control adjustment knob.

" conduit holes in end

Pilot Light

(Optional)

Thermometer

Load (Tank, vat, die or platen)

WIRING

6. Connect wires according to wiring diagrams (Figures 8 thru

12). Note: Electrical connections should be made with gener-

ous loops of wire — approximately 6" per lead.

7. Replace cover, tighten screws, replace dial knob and dial knob

cover.

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

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

by customer.

Figure 5

CALIBRATION

Figure 11

If calibration is required, either one of two methods may be

followed.

1. If accurate measurement standards are not available, the ther-

mostat can readily be adjusted to a known temperature stan-

dard such as boiling water (212°F) (see Figure 10).

2. With the aid of an accurate thermometer or other temperature

measuring device, recalibration may be performed within the

process as in Figure 11.

Figure 6

Pilot Light

(Optional)

Figure 9 — Three-Phase Delta Load

Figure 12

Figure 7