Chromalox PF497-1 user manual

Summary of the content on the page No. 1

®
Chromalox
Installation, Operation
DIVISION 4 SECTION
DRA
and
SALES
(Supersedes PF-497) (Supersedes PG422-1)
REFERENCE PF497-1
RENEWAL PARTS IDENTIFICATION 161-304812-001
DATE
NOVEMBER, 2002
Portable Industrial
Unit Blower Air Heater
Type DRA
Specifications – Table 1
Electrical Data (60 Hz) Dimensions (In.)
Model
Volts kW Phase Amps* 1/3 PhBTUHeight Width Depth
DRA-07-83 208 7.5 1 and 3 36.3/21.0 25,590 34.25 27.5 25
DRA-07-23 240/208 7.5/5.6 1 and 3 31.5/18.3** 25,590 34.25 27.5 25
DRA-10-83 2

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IMPORTANT INSTRUCTIONS When using electrical appliances, basic precautions should always 8. Do not run cord under carpeting. Do not cover cord with throw be followed to reduce the risk of fire, electric shock and injury to rugs, runners or the like. Arrange cord away from traffic area persons, including the following: and where it will not be tripped over. 1. Read all instructions before using this heater. 9. To disconnect heater, turn thermostat off, then remove plug 2. This heater is hot when

Summary of the content on the page No. 3

WIRING Chart A — Cable and Plug Selection Wiring Wire 25’ Cord SetOptional Plugs ModelkW VoltsPhase Diag. No. Amps SizeChromalox Catalog No. Locking Type Non Lock Type DRA-07-83 7.5 208 1 1A 36.3 8/3 PLC-2508-3 ——— PGN-6-50 DRA-07-83 7.5 208 3 1 21.0 10/4 PLC-2510-4 PGL-15-30 PGN-15-50 DRA-07-23 5.6 208 1 1A 27.1 10/3 PLC-2510-3 PGL-15-30 PGN-6-50 DRA-07-23 5.6 208 3 1 15.7 12/4 PLC-2512-4 PGL-15-20 PGN-15-20 DRA-07-23 7.5 240 1 1A 31.5 8/3 PLC-2508-3 ——— PGN-6-50 DRA-07-23 7.5 240 3 1 18.2 12/4

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WIRING Cord Preparation for Chromalox Portable Heaters 3. Slide fitting onto cord and tighten knurled nut to secure fitting 1. Determine the gage and number of conductors from the tabu- to cord. lation below using amps and phase from the heater nameplate. 4. Select plug to match electrical rating of cord. It is not recommended that cord exceed 50 feet in length. 5. On opposite end of cord prepare end as directed by instructions that are provided with the plug. Chromalox Cord Kit* Cord Ga/No. Con

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WIRING DIAGRAMS Diag. 1 – FACTORY WIRED 3 PHASE Diag. 1a – FIELD CONVERSION TO 1 PHASE Cord by others. Cord by others. Type "SO" or equal Type "SO" or equal sized to meet nameplate requirements sized to meet nameplate 6 6 requirements 5 5 2 2 3 2 6 6 L3 T3 1 5 Front of Front of 1 5 1 L2 L2 4 Heater T2 T2 Heater 4 L1 3 L1 3 T1 2 T1 1 4 4 All control wiring Thermostat same as Diag. 1 1 3 3 Instructions: 1. Loosen screws on load side of contactor. Remove all lead wire. 4 6 Red 2. Insert lea

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MAINTENANCE Replace or repair damaged cords or plugs immediately. Check tightness of all electrical connections prior to energizing Dragon. Blow out or vacuum away any dirt or debries that may have accu- ELECTRIC SHOCK HAZARD. Disconnect heater mulated around the control enclosure fan motor or heating ele- from power supply before servicing and/or inspect- ments. ing the heater; failure to do so may result in elec- trical shock. RENEWAL PARTS IDENTIFICATION Element MotorFan ContactorControl Mode