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®
Chromalox
SERVICE REFERENCE
Installation Operation
DIVISION 4 SECTION ADH
SALES
and
REFERENCE (Supersedes PF438-3) PF438-4
161-057949-001
RENEWAL PARTS IDENTIFICATION
DATE SEPTEMBER, 2004
Type ADH and ADHT
Air Duct Heaters
Specifications — Table A
No. Mtg.
Approx. Approx. Holes
Dimensions (In.)
Net. Wt. Net. Wt. No. 9/32” No.
Model (Lbs.) Model (Lbs.) Volts Phase kW Elements Dia. Circuits A B C D E H K L M
ADH-005 8 ADHT-005 10 480 3 5 3 10 1 5-5/8 20-3/8
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GENERAL sition. The slope of the transformation piece on the upstream side of the equipment is limited to 30° as indicated in Figure 3. FIRE/EXPLOSION HAZARD. This heater is not On the leaving side, the slope should not be more than 45°. intended for use in hazardous atmospheres where 6. Use moisture proof terminal cover in atmospheres bearing cor- flammable vapors, gases, liquids or other com- rosive fumes or excessive moisture. bustible atmospheres are present as defined in the 7. Use explosio
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INSTALLATION (cont’d.) 6. In high ambient temperature operations, least corrosive action and least oxidation to the terminals will occur if the heaters are HAZARD OF FIRE. Since these heaters are capable of mounted with the terminals in the coolest possible ambient, developing high temperatures, extreme care should usually on the bottom or side of the duct. be taken to: A. Minimum duct size is “A” or “L” dimension +3/8” and “B” A. Avoid installing heaters in an atmosphere containing com- dimens
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OPERATION Do not operate heater at voltages in excess of that stamped on the heater since excess voltage will shorten heater life. MAINTENANCE 1. Periodically clean terminals and terminal covers of dust and corro- sion to maintain good electrical connections and to permit rapid heat dissipation. Use airblast, and be careful to avoid damage to ELECTRIC SHOCK HAZARD. Disconnect all power mica insulation. before installing or servicing heater. Failure to do 2. Check for loose terminal connections.
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WIRING DIAGRAMS ADH-040, ADHT-040 ADH-045, ADHT-045 2 Circuits per Heater, Circuit A, 15 Elements, 2 Circuits per Heater, Circuit A, B, 12 Elements per Circuit, Circuit B, 12 Elements, 27 Elements per Heater 24 Elements per Heater AL1 BL1 AL1, BL1 AL2 BL2 AL2, BL2 AL3, BL3 AL3 BL3 Typical Circuit Circuit A Circuit B ADH-050, ADHT-050 2 Circuits per Heater, Circuit A 18 Elements, Circuit B 12 Elements, 30 Elements per Heater AL1 BL1 BL2 AL2 BL3 AL3 Circuit A Circuit B ADH-060, ADHT-060 ADH-080, A
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WIRING DIAGRAMS ADHT-120 ADH-144 4 Circuits per Heater, Circuit A, B, C, D, 4 Circuits per Heater, Circuit A, B, C, D, 9 Elements per Circuit, 36 Elements per Heater 12 Elements per Circuit, 48 Elements per Heater AL1, BL1, CL1, DL1 AL1, BL1, CL1, DL1 AL2, BL2, CL2, DL2 AL2, BL2, CL2, DL2 AL3, BL3, CL3, DL3 AL3, BL3, CL3, DL3 Typical Circuit Typical Circuit ADH-160 ADH-162, ADHT-180 8 Circuits, Circuit A, B, C, D, E, F, G, H, 6 Circuits, Circuit A, B, C, D, E, F, 6 Elements per Circuit, 48 Eleme
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RENEWAL PARTS IDENTIFICATION — TYPE ADH ❶❷ ❸ * ❹❺ ❻ Individual Element Element Support Rod Terminal Block Replacement Flange Model Retaining Clip Spacer Plate Spacers Assembly Element ADH-005 393-055440-007 (3) 121-055367-001 272-511327-001 (6) 271-055370-001 242-055376-001 (4) 303-027852-001 ADH-010 393-055440-006 (6) 121-055367-002 272-511327-001 (12) 271-055370-002 242-055376-001 (4) 303-027852-001 ADH-015 393-055440-007 (9) 121-055367-003 272-511327-001 (18) 271-055370-003 242-055376-001 (4)
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RENEWAL PARTS IDENTIFICATION — TYPE ADHT ❶❷ ❸ ❹ * ❺❻ ❼ ❽ Individual Element Element Support Rod Terminal Block Thermocouple Replacement Thermocouples Flange Model Retaining Clip Spacer Plate Spacers Assembly Terminal Block Element ADHT-005 393-055441-007 (3) 309-122380-003 121-055367-001 272-511327-001 (6) 271-055370-016 242-055376-002 (4) 303-027852-001 303-122014-002 ADHT-010 393-055441-006 (6) 309-122380-003 121-055367-002 272-511327-001 (12) 271-055370-017 242-055376-002 (4) 303-027852-001 3
