Chromalox SDRA-RG - Manual (Page 7)

7
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.
Replace or repair damaged cords or plugs immediately. Check tight-
ness of all electrical connections prior to energizing Dragon. Blow out
or vacuum away any dirt or debris that may have accumulated around
the control enclosure fan motor or heating elements.
RENEWAL PARTS IDENTIFICATION
PARTS COMMON TO ALL UNITS
Item Description Part No.
18 Temperature Control 300-019560-002
19 Hi-Limit Cut-out 300-049200-004
23 Toggle Switch 292-046123-001
32 Blower Assembly 021-304823-009
33 Inlet & Outlet Grille 134-304780-002(2)
36 Caster / Locking 375-122535-007
37 Handle - Right Side 139-304779-003
38 Handle - Left Side 139-304779-004
45 Semipneumatic Wheel 333-557518-004(2)
77 Pulley Var. Pitch 7/8” 225-305091-004
78 Pulley Var. Pitch 5/8” 225-305091-003
79 Pulley Belt 017-049702-009
86 Pilot Light - Green 213-122066-043
87 Pilot Light - Amber 213-122066-042
94 Thermostat Knob 169-300468-003
95 Thermostat Label 220-019122-010
Element (11) Element (12) Motor (16) Contactor (20) Transformer (21) Fuse Block (80) Fuse (81) Term. Block (84)
Model No. Volts kW Phase Part No. Part No. Part No. Part No. Part No. Part No. Part No. Part No.
SDRA-30-43 480 30 3 118-304793-011(3) 118-304793-013(3) 193-121843-232 072-304551-008 315-304252-001 N/A N/A N/A*
SDRA-30-93 600 30 3 118-304793-012(3) 118-304793-014(3) 193-121843-233 072-304551-008 315-304252-003 N/A N/A N/A*
SDRA-48-43 480 48 3 118-304793-011(3) 118-304793-013(6) 193-121843-232 072-304551-008(2) 315-304252-001 129-025643-001 128-026510-005(3) 303-047468-004
SDRA-48-93 600 48 3 118-304793-012(3) 118-304793-014(6) 193-121843-233 072-304551-008(2) 315-304252-003 129-025643-001 128-026510-005(3) 303-047468-004
SDRA-60-43 480 60 3 118-304793-011(6) 118-304793-013(6) 193-121843-232 072-304551-008(2) 315-304252-001 129-025643-001(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