Chromalox PG412-10 User Manual

(Supersedes PG412-9)

PG412-10

RADD

161-026681-001

DECEMBER, 2008

4

RENEWAL PARTS IDENTIFICATION

Installation, Operation

and

DATE

SALES

REFERENCE

DIVISION SECTION

Chromalox

®

© 2010 Chromalox, Inc.

Type RADD Electric

Radiant Heaters

Specifications

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 sup-

ply 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.

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.

1. These radiant heaters are designed for indoor installation only.

2. Mounting Clamps — Mount heaters by using the mounting

clamp and 3/8” bolt assembly.

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. 2) For proper heater support, the
maximum distance between clamps must not exceed 48”. On
extra-long 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
framing is reusable.

(Interlocking Connectors

Discontinued)

AB

Model No. Volts kW Overall Length Heated Length

RADD-2164 120 or 240

1.6 24-3/8 16-1/2

RADD-2164V 208 or 275
RADD-3224 120 or 240

2.2 30-5/8 22-3/4

RADD-3224V 208 or 275
RADD-3264V 208 or 275

2.6 35-7/8 28-5/16

RADD-3264 240 or 480
RADD-4364V 208 or 275

3.6 46-5/8 38-1/2

RADD-4364 240 or 480
RADD-5434V 208 or 275

4.3 53-7/8 45-7/16

RADD-5434 240 or 480
RADD-5504V 208 or 275

5.0 61-3/8 53-3/8

RADD-5504 240 or 480
RADD-6544V 208 or 275

5.4 65-7/8 58-1/4

RADD-6544 240 or 480
RADD-6604V 208 or 275

6.0 73-3/4 65-3/4

RADD-6604 240 or 480
RADD-7674V 208 or 275

6.7 79-7/8 72-1/4

RADD-7674 240 or 480
RADD-7724V 208 or 275

7.2 85-3/4 78

RADD-7724 240 or 480
RADD-8904V 208 or 275

9.0 106 97-1/2

RADD-8904 240 or 480
RADD-7604X10 240 or 480 8.0 114-1/8 106
RADD-7604X13 240 or 480 10 141 132
RADD-7604X9A 240 or 480 11 160-5/8 150
RADD-7724X38 240 or 480 13 185-5/8 174

B

A

Figure 1 — Heater Parts and Dimensions

Figure 2

!

-2-

INSTALLATION (cont’d.)

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.

ELECTRIC SHOCK HAZARD. Any installation
involving electric heaters must be performed by a
qualified person and must be effectively grounded
in accordance with the National Electrical Code to
eliminate shock hazard.

1. Electrical connection to the Radiant Heater is made through

two openings tapped for 1/2” connector. Openings are in the
top of the extruded heater housing, one near each end.

2. Access to Radiant Heater terminals is obtained by removing

the two screws in each of the terminal box covers.

3. Wiring should be run in flexible or rigid metal conduit and

must be installed in accordance with the requirements of the
National Electric Code and such other local requirements as
may be applicable.

4. Wires supplying power to heating element terminals shall have

insulation rated for 150°C minimum.

High Temperatures will oxidize copper. Use only nickel­plated copper wire for supplying power to heater. Do not
use aluminum conductors.

5. A sufficient length of high temperature wire (not less than 12”

should extend from heater terminals to a remote connection
box whose location involves normal room temperatures there­by permitting use of normal electrical wiring to that point.

6. Leave loop of wire in heater terminal box to allow for expan-

sion movement of heating elements.

7. Assemble terminal, screw, saddle clamp and wire as shown in

Figure 3.

8. Hold terminal with pliers and tighten the terminal screw

securely with a screwdriver.

9. Single End. Parallel Wiring (Fig. 4A) Power wiring enters

heater through either of the 1/2” tapped openings in heater
housing. Wiring to opposite end is conveyed through wire-way
provided behind integral reflector in housing extrusion. High
temperature wire must be used; maximum wire diameter (over
insulation) must not exceed 0.224”. Each element must be
rated at applied line voltage.

10. Single End, Series Wiring (Fig. 4B) Power wiring enters

heater through either of the 1/2” tapped openings in heater
housing. Heating element terminals at opposite end are wired
in series. High temperature wiring must be used. Each element
must be rated at 1/2 line voltage.

External series wiring of radiant heater assemblies is not prac­tical when internal series connections can be made so easily.

WIRING

Single End — Parallel

Figure 4A

Single End — Series

Figure 4B

Figure 3

5. Reflector Spacer Sheets —

Where heaters are not mounted side
by side (see Fig. 2), 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 factory.

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.