Maintenance - Chromalox SDRA-30-43 Installation And Operation Instructions Manual

Maintenance

ELECTRIC SHOCK HAZARD. Disconnect heater from
power supply before servicing and/or inspecting
the heater; failure to do so may result in electrical
shock.
Renewal Parts Identification
Element (11)
Model No. Volts kW Ph. Part No.
SDRA-30-43 480 30 3 118-304793-011(3) 118-304793-013(3) 193-121843-232 072-304551-008
SDRA-30-93 600 30 3 118-304793-012(3) 118-304793-014(3) 193-121843-233 072-304551-008
SDRA-48-43 480 48 3 118-304793-011(3) 118-304793-013(6) 193-121843-232 072-304551-008(2) 315-303786-001 129-025643-001
SDRA-48-93 600 48 3 118-304793-012(3) 118-304793-014(6) 193-121843-233 072-304551-008(2) 315-304252-003 129-025643-001
SDRA-60-43 480 60 3 118-304793-011(6) 118-304793-013(6) 193-121843-232 072-304551-008(2) 315-303786-001 129-025643-001(2) 128-026510-006(6) 303-047468-004
SDRA-60-93 600 60 3 118-304793-012(6) 118-304793-014(6) 193-121843-233 072-304551-008(2) 315-304252-003 129-025643-001(2) 128-026510-006(6) 303-047468-004
* Wired directly to contactor.
All units contain two sets of elements. The ratings of the elements on the discharge end have a lower wattage than the elements on the inlet end of heater.
The ends of the elements are color coded, the lower wattage are color coded yellow and the higher wattage are color coded blue.
a. Lower wattage elements, discharge end, yellow coded
b. Higher wattage elements, fan end, blue coded
Element (12) Motor (16)
Part No. Part No.
Parts Common to all Units
Item Description
18 Temperature Control
19 Hi-Limit Cut-out
23 Toggle Switch
32 Blower Assembly
33 Inlet & Outlet Grille
36 Caster / Locking
37 Handle - Right Side
38 Handle - Left Side
45 Semipneumatic Wheel
77 Pulley Var. Pitch 7/8"
78 Pulley Var. Pitch 5/8"
79 Pulley Belt
86 Pilot Light – Green
87 Pilot Light – Amber
94 Thermostat Knob
95 Thermostat Label
Replace or repair damaged cords or plugs immediately.
Check tightness of all electrical connections prior to energiz-
ing Dragon. Blow out or vacuum away any dirt or debris that
may have accumulated around the control enclosure fan mo-
tor or heating elements.
Contactor (20) Transformer
Part No. (21) Part No.
315-303786-001
315-304252-003
Part No.
300-019560-002
300-049200-004
292-046123-001
021-304823-009
134-304780-002(2)
375-122535-007
139-304779-003
139-304779-004
333-557518-006(2)
225-305091-004
225-305091-003
017-049702-009
213-122066-043
213-122066-042
169-300468-003
220-019122-010
9
Fuse Block (80) Fuse (81)
Part No. Part No.
N/A N/A
N/A N/A
128-026510-005(3) 303-047468-004
128-026510-005(3) 303-047468-004
Term. Block
(84) Part No.
N/A*
N/A*