Chromalox PD411-10 Installation, Operating, & Maintenance Instructions Download

Page: 7 / 8

Do not operate heater at voltages in excess of that stamped on the
heater since excess voltage will shorten heater life.

Always maintain a minimum of 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 will overheat and
shorten heater life. DO NOT OPERATE HEATER IF DRY.

Keep heating elements above sediment deposits.

4. Low Megohm Condition

— The refractory material used in elec-

tric heaters may absorb moisture during transit, storage or when
subject to humid environments that will reduce the cold insulation
resistance (low megohm). Low megohm may result in a high leak-
age current to ground and nuisance trips of ground fault protection
equipment. Normally, the megohm value increases after heat-up.
Typical insulation valves are 5 megohm or greater on complete

assemblies or 20 megohm on individual unsealed elements. It is
recommended that heaters with 1 megohm or less be dried out
before applying full power. If dried properly, low megohm will not
effect heater life or efficiency.
To correct a low megohm condition, remove terminal enclosure
cover, gaskets, and terminal hardware. Bake heaters in an oven at
300 to 500˚F for several hours or preferably overnight.
An alternate procedure is to cycle the heater in 10 to 15 minute
periods at low voltage until megohm values are normal. Sheath
temperatures should not exceed 350˚F.

NOTE:

Low megohm on heating elements with epoxy or hermetic
seals cannot be serviced in the field. Typical resistance val-
ues when sealed are 200 megohm or greater. Contact Chro-
malox service center at number listed.

OPERATION

Term. Block

Contactor

Thermostat

Junction Box

120V

240V

Low

Liquid

Control

Factory

Field

Term. Block

Contactor

L1
L2

Thermostat

Junction Box

120V

240V

Low

Liquid

Control

Factory

Field

WIRING DIAGRAM 7

WIRING DIAGRAM 8

Factory
Field

120V

240V

Contactor

Thermostat

Low

Liquid

Control

Term. Block

Junction Box

120V

240V

Contactor

Thermostat

Low

Liquid

Control

Term. Block

Junction Box

Factory
Field

WIRING DIAGRAM 6

WIRING DIAGRAM 5

Summary of Contents for PD411-10

Page 1: ...esult in person al injury The seriousness of the potential risk is identified by one of these three words will result in serious injury or death could result in serious injury or death may result in minor or moderate injury Read and follow these instructions to minimize risks of electric shock or fire Save these instructions for future reference Chromalox Type TLC TLO TLS TLI KTLC KTLO KTLS KTLI K...

Page 2: ... Steel 48 56 1 2 TLS 210 2 1 240 480 10 TLS 315 3 1 or 3Δ 240 480 15 Stainless Steel 48 45 TLS 212 2 1 240 480 12 TLS 318 3 1 or 3Δ 240 480 18 Stainless Steel 48 52 1 2 TLS 220 2 1 120 240 480 2 TLS 330 3 1 or 3Δ 120 240 3 Stainless Steel 36 12 1 4 1 or 3Y 480 TLS 240 2 1 120 240 480 4 TLS 360 3 1 or 3Δ 120 240 480 6 Stainless Steel 36 22 1 4 TLS 260 2 1 120 240 480 6 TLS 390 3 1 or 3Δ 120 240 480...

Page 3: ...5 3 1 or 3Δ 240 480 15 Incoloy 48 21 1 4 Fig 2 KTLI 212 2 1 240 480 12 KTLI 318 3 1 or 3Δ 240 480 18 Incoloy 48 23 1 2 Fig 2 KTLI 220 2 1 120 240 480 2 KTLI 330 3 1 or 3Δ 120 240 3 Incoloy 36 10 5 8 Fig 1 1 or 3Y 480 KTLI 240 2 1 120 240 480 4 KTLI 360 3 1 or 3Δ 120 240 480 6 Incoloy 36 13 3 4 Fig 2 KTLI 260 2 1 120 240 480 6 KTLI 390 3 1 or 3Δ 120 240 480 9 Incoloy 36 16 1 8 Fig 2 KTLI 280 2 1 24...

Page 4: ... equipment additional protec tion such as a metal guard may be needed 6 In the electroplating operation the heaters are not under any cir cumstance to be placed between the electrodes and the work 7 When melting solids by direct immersion a surface vent should be provided to allow gases to escape Operate the heater on half volt age until melted material completely covers the heater area 8 A drip l...

Page 5: ...480V Model 1ø 3øΔz 1ø 3øΔz 1ø 3øΔz 3øY Model 1ø 3øΔz 1ø 3øΔz 1ø 3øΔz 3øY Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig TLC TLI and TLS 210 1 1 TLO 310 3 4 3 4 TLC TLI and TLS 212 1 1 TLC TLI and TLS 312 3 4 3 4 TLC TLI TLO and TLS 220 1 1 2 TLC TLI and TLS 315 3 4 3 4 TLO 230 1 1 1 TLC TLI and TLS 318 3 4 3 4 TLC TLI TLO and TLS 240 1 1 1 TLC TLI TLO and TLS 330 3 4 3 4 5 4 6 TLO 250 1 1...

Page 6: ...KTLS 220 1 1 2 KTLC KTLI and KTLS 315 3 4 3 4 KTLO 230 1 1 1 KTLC KTLI and KTLS 318 3 4 3 4 KTLC KTLI KTLO and KTLS 240 1 1 1 KTLC KTLI KTLO and KTLS 330 3 4 3 4 5 4 6 KTLO 250 1 1 1 KTLO 345 3 4 3 4 3 4 KTLC KTLI KTLO and KTLS 260 1 1 1 KTLC KTLI KTLO and KTLS 360 3 4 3 4 3 4 KTLO 270 1 1 KTLO 375 3 4 3 4 3 4 KTLC KTLI and KTLS 280 1 1 KTLC KTLI KTLO and KTLS 390 3 4 3 4 3 4 Note Use wire size an...

Page 7: ... 1 megohm or less be dried out before applying full power If dried properly low megohm will not effect heater life or efficiency To correct a low megohm condition remove terminal enclosure cover gaskets and terminal hardware Bake heaters in an oven at 300 to 500 F for several hours or preferably overnight An alternate procedure is to cycle the heater in 10 to 15 minute periods at low voltage until...

Page 8: ...t and replace if necessary Check conduit layout to correct conditions that allow corrosion to enter the ter minal enclosure 6 Clean terminal ends of all contamination 1 Thermostat Kit order by PCN A 0 100 F PCN 277835 B 60 250 F PCN 277819 2 Thermostat Knob A 0 100 F 169 019605 002 B 60 250 F 169 019604 001 C 200 550 F 169 019604 002 3 Sludge Legs A TLC KTLC Series 176 114713 001 B TLI KTLI Series...

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