Chromalox PG405-5 User Manual
DIVISION 4 SECTION
U-RAD
SALES
REFERENCE
DATE
SERVICE REFERENCE
Installation, Operation
and
RENEWAL PARTS IDENTIFICATION
161-048457-001
APRIL, 2005
PG405-5
(Supersedes PG405-4)
Chromalox
®
© 2010 Chromalox, Inc.
Model Volts kW
Overall Heated
U-RAD-2 120 or 240
800 12-3/4 8-5/16
U-RAD-2V 208 or 275
U-RAD-3 120 or 240
1100 15-7/8 11-7/16
U-RAD-3V 208 or 275
U-RAD-4V 208 or 275
1800 23-13/16 19-3/8
U-RAD-4 240 or 480
U-RAD-5V 208 or 275
2500 31-1/4 26-13/16
U-RAD-5 240 or 480
U-RAD-6V 208 or 275
3000 37-1/4 32-13/16
U-RAD-6 240 or 480
U-RAD-7V 208 or 275
3600 43-3/8 38-15/16
U-RAD-7 240 or 480
Type U-RAD Electric Radiant Heaters
The Safety Alert Symbol is used to indicate a
risk of personal injury.
Please familiarize yourself with these instructions before
attempting to install or operate this Radiant Heater.
Before Installing
1. Open carton and remove heater at the place of installation.
Mounting clamps are in parts bag in carton.
2. Check nameplate volt and watt rating against your power supply
voltage and heating requirements of your installation. This
nameplate is located on one end of the heater.
The system designer is responsible for the safety of
this equipment and should install adequate back-up
controls and safety devices with their electric heating equipment. Where the consequences of failure
could result in personal injury or property damage,
back-up controls are essential.
Specifications Table –
Single U-Shaped Element
Model Volts kW
Overall Heated
U-RAD-22 120 or 240
1600 25-1/2 16-5/8
U-RAD-22V 208 or 275
U-RAD-32 120 or 240
1900 28-5/8 19-3/4
U-RAD-32V 208 or 275
U-RAD-33 120 or 240
2200 31-3/4 22-7/8
U-RAD-33V 208 or 275
U-RAD-42V 208 or 275
2600 36-9/16 27-11/16
U-RAD-42 240
U-RAD-43V 208 or 275
2900 39-11/16 30-13/16
U-RAD-43 240
U-RAD-44V 208 or 275
3600 47-9/16 38-11/16
U-RAD-44 240
U-RAD-52V 208 or 275
3300 44 35-1/8
U-RAD-52 240
U-RAD-53V 208 or 275
3600 47-1/8 38-1/4
U-RAD-53 240
U-RAD-54V 208 or 275
4300 55-1/16 46-3/16
U-RAD-54 240 or 480
U-RAD-55V 208 or 275
5000 62-7/16 53-9/16
U-RAD-55 240 or 480
U-RAD-62V 208 or 275
3800 50 41-1/8
U-RAD-62 240
U-RAD-63V 208 or 275
4100 53-1/8 44-1/4
U-RAD-63 240
U-RAD-64V 208 or 275
4800 61-1/16 52-3/16
U-RAD-64 240 or 480
U-RAD-65V 208 or 275
5500 68-1/2 59-5/8
U-RAD-65 240 or 480
U-RAD-66V 208 or 275
6000 74-1/2 65-5/8
U-RAD-66 240 or 480
U-RAD-72V 208 or 275
4400 56-1/8 47-1/4
U-RAD-72 240
U-RAD-73V 208 or 275
4700 59-1/4 50-3/8
U-RAD-73 240
U-RAD-74V 208 or 275
5400 67-1/8 58-1/4
U-RAD-74 240 or 480
U-RAD-75V 208 or 275
6100 74-1/2 65-5/8
U-RAD-75 240 or 480
U-RAD-76V 208 or 275
6600 80-5/8 71-3/4
U-RAD-76 240 or 480
U-RAD-77V 208 or 275
7200 86-3/4 77-7/8
U-RAD-77 240 or 480
Two U-Shaped Elements
A
B
A
B
Conduit
Connector
Single-Element U-RAD
Double-Element U-RAD
Length (In.)
Length (In.)
!
INSTALLATION
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do
so could result in personal injury or property damage. Heater must be installed or serviced by a qualified person in accordance with the National
Electrical Code, NFPA 70.
Mounting
1. These radiant heaters are designed for indoor installation only.
2. Clamps — Heaters are mounted by means of the mounting
clamp and 3/8” bolt assembly which is used as shown in Fig. 2.
Clamp assembly may be attached to heater by sliding over end
or by snapping over top of extruded frame section at any point
along its length (see Fig. 3). For proper heater support, the maximum distance between clamps must not exceed 48”. On extralong heaters, more than two clamps are furnished.
3. Mounting Holes — When heaters are mounted adjacent to
each other in the same plane, note that distance between mounting
holes on framing to support heaters will be 3-11/16”minimum.
When heaters are not in the same plane, i.e. set at an angle to one
another, distance between mounting holes in framing will be either
greater or less than 3-11/16”.
4. Framing — Where an extensive installation is being made,
the use of continuous slot metal framing manufactured by several concerns will be of assistance in saving time and money.
The frame is reusable.
5. Reflector Spacer Sheets — Where heaters are not mounted
side by side (see Fig. 4), reflector spacer sheets can be used
between heaters. These reflector spacer sheets and companion
reflectors consisting of an extruded aluminum housing with
reflector sheet and mounting clamps are available. Check with
local sales representative.
6. Insulation — Where unusually high work temperatures are
encountered, it may be desirable to insulate backs of heaters
with high-temperature fibrous insulation. A suggested method
of accomplishing this is indicated in Fig. 4.
7. Ventilation — Where solvents, water, etc. are being evaporat-
ed from work in process, it is necessary to provide substantial
quantities of ventilation air to carry away the resulting vapors.
FIRE HAZARD. Since Radiant heaters are capable
of developing high temperatures, extreme care
should be taken to:
A. Keep combustible materials at least 6” away
form sides and back of heater housing and its supporting brackets and spaced far enough in front of
heater (heating element side) so thermal radiation
from the elements will not ignite combustible
materials.
B. If combustible materials are being processed,
stoppage of process should initiate immediate
heater shutdown and interception of residual heat
from radiant heaters (use radiation baffles or move
heaters away from work).
C. In the case of solvents of an explosive nature,
ventilation air must be in sufficient volume to
dilute the solvent vapor so that explosive mixtures
cannot occur, refer to NFPA 86, Standard for Ovens
and Furnaces.
Figure 4
Insulation
Reflector
Spacer Sheet
Mounting Frame
Figure 1 — Heater Parts and Dimensions
Terminal Cover
Terminal Block
Element
Polished Aluminum Reflector
Interlocking Connector
Housing
Mounting
Clamp
Assembly
2-3/8”
3-11/16”
1/4”
1-7/8”
Figure 3
2-3/8”
2-15/16”
3-
Figure 2
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