Chromalox SDRA - Manual
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Table of Contents:
- Page 2 – IMPORTANT INSTRUCTIONS; SAVE THESE INSTRUCTIONS.; WIRING
- Page 3 – ACCESSORIES; SDRA heaters can be easily field if modified to vary the fan speed.; Adjustable Damper and Duct Adaptor; Rear of; Adjustable
- Page 4 – FAN SPEED ADJUSTMENTS; Leave; Table 1
- Page 5 – WIRING DIAGRAMS
- Page 6 – PARTS LOCATION; Element Assembly 30kW
DATE
SALES
REFERENCE
DIVISION
SECTION
Chromalox
®
(Supersedes PF499-1)
PF499-2
SDRA
161-304812-003
AUGUST, 2010
4
RENEWAL PARTS IDENTIFICATION
Installation, Operation
and
Portable Industrial Unit
Blower Air Heater
Types SDRA and SDRA-RG
© 2010 Chromalox, Inc.
Specifications – Table 1
GENERAL
IMPORTANT:
SAVE THESE INSTRUCTIONS
RISK OF FIRE. Do not use as a residential or house-
hold heater
Hazard of Fire or Discoloration of Temperature
Sensitive Fabrics. Do not use as a residential or
household heater. Keep combustible material and
such fabrics away from heater. Do not operate heater
where flammable vapors, gases or liquids are present.
Heaters in the heat mode should not be operated in
room temperatures above 130˚F. Fan motor is not
designed to operate in ambients below -10˚F.
To avoid personal injury read “IMPORTANT INSTRUC-
TIONS” on page 2 before installation or operation of
heater.
Keep electrical cords and combustible materials, such
as drapes and other furnishings, away from heater.
Electrical Data (60 Hz)
Dimensions (In)
Model
Volts
kW
Phase
Amps
BTU
Height
Width
Depth
SDRA-30-43
480
30
3
37.2
102,360
38.5
26
44
SDRA-30-93
600
30
3
30.0
102,360
38.5
26
44
SDRA-48-43
480
48
3
58.9
163,776
38.5
30-1/4
44
SDRA-48-93
600
48
3
47.3
163,776
38.5
30-1/4
44
SDRA-60-43
480
60
3
73.3
204,720
38.5
30-1/4
44
SDRA-60-93
600
60
3
58.9
204,720
38.5
30-1/4
44
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Summary
2 IMPORTANT INSTRUCTIONS When using electrical appliances, basic precautions should always befollowed to reduce the risk of fire, electric shock and injury to persons,including the following: 1. Read all instructions before using this heater. 2. This heater is hot when in use. To avoid burns, do not...
3 WIRING (cont’d.) ACCESSORIES Temperature Rise vs Duct Length 30 kW 100 75 50 25 0 0 100 75 50 25 125 150 175 Duct Length in Feet Temperature Rise ˚F 1500 RPM 1800 RPM 2200 RPM Temperature Rise vs Duct Length 48 kW 100 60 40 20 0 0 100 75 50 25 125 150 175 Duct Length in Feet Temperature Rise ˚F 12...
FAN SPEED ADJUSTMENTS Changing the Pitch Diameter of the Sheaves:1. Tools required: 5/32” allen wrench, 3/8” nut driver, 9/16” boxwrench and a medium size phillips screwdriver. 2. Remove the lower belt cover by removing the (5) sheet metalscrews. 3. Remove the rear grille by removing the (4) 1/4” bo...
