Chromalox PD412-5 Folheto

Model CIT-218 (Figure 3) is designed for through-the-wall
installation.
1. To install, drill three holes in side of crucible at proper height

using hole dimensions shown in Figure 4 or by using gasket
enclosed with heater as a template.

2. Insert heater first through gasket and then through tank wall

opening making sure that gasket is firmly seated between
heater flange and tank wall.

3. Using standard hardware bolts and nuts consistent with the hole

diameter and the tank wall thickness, secure heater into place.

DANGER: Hazard of Fire. - Since these heaters are
capable of developing high temperatures, extreme
care should be taken to:
A. Avoid installing heaters in an atmosphere containing combustible

gases and vapors.

B. Avoid contact between heater and combustible material.
C. Keep combustible materials far enough away to be free of the

effects of high temperatures.

9 9   -   0 5 8

T A   -   S9 -   E F
Litho in U.S.A.

1. Electrical wiring to heater must be installed in accordance with the

National Electrical Code and with local codes by a qualified per-

sonas defined in the NEC.

2. When element wattages are not equal, heaters must not be connect-

ed in series.

3. Electrical wiring to heater should be contained in rigid conduit or in

sealed flexible hose to keep corrosive vapors and liquids out of the
terminal housing. If high humidity is encountered, the conduit
should slope away from the heater.

4. If flexible cord is employed, a watertight connector should be used

for entry of the cord into the terminal box. Outdoor applications
require liquid-tight conduit and connectors.

5. Bring the power line wires through the opening in the terminal box.

Connect line wires as shown in the appropriate wiring diagrams
(see Diagrams 1, 2 and 3).

Ground

Thermostat

Heating

Element

Power

Supply

L1

L2

Contactor

Heating

Element(s)

Ground

Thermostat

Power

Supply

Control

Circuit

T1

T2

L1

L2

Contactor

Heating

Elements

Ground

Thermostat

Three

Phase

Power

Supply

Control

Circuit

T1

T2

T3

L1

L2

L3

1. Do not operate heaters at voltages in excess of that stamped on the

heater since excess voltage will shorten life.

2. Always maintain 6" to 8" of liquid above the heated portion of the

element to prevent exposure of the effective heated length. If the
heater is not properly submerged, it may overheat and shorten
heater life. DO NOT OPERATE HEATER IF DRY.

3. Sludge should not be allowed to buildup to the point where it con-

tacts heater as this can lead to premature heater failure.

4. Buildup of dross accumulation on the surface of liquid metal

should be prevented to insure satisfactory operation of the heater.

5. When melting solids by direct immersion, a surface vent should

be provided to allow gases to escape. 

1. Heaters should be checked periodically for coatings and corrosion

and cleaned if necessary.

2. The tank should be checked regularly for sediment around the heater

as sediment can act as an insulator and shorten heater life. 

3. Remove any accumulated sludge deposits from heater and from tank.

4. Check for loose terminal connections and tighten if necessary.

5. If corrosion is indicated in the terminal housing, check terminal box

gasket and replace if necessary. Check conduit layout to correct con-
ditions that allow corrosion to enter the terminal housing.

6. Clean terminal ends of all contamination.

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

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