Electric Heater User Manual

INSTALLATION
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do
so could result in personal injury or property dam-
age. Heater must be installed or serviced by a qual-
ified person in accordance with the National
Electrical Code, NFPA 70.
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 Figure
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 Figure 3.) 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 others
will be of assistance in saving time and money. The framing is
reusable.
5. R
eflector Spacer Sheets — Where heaters are not mounted side
by side (see Figure 4), reflector spacer sheets can be used between
heaters. These reflector spacer sheets and companion reflectors
consisting of an extruded aluminum housing with reflector sheets
and mounting clamps are available. Check factory.
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 Figure 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 sup-
porting 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.
2
Figure 1 — Heater Parts and Dimensions
3-11/16”
1-9/16”
Wiring Entry
One Hole Each End
1/2” 14 N P S L
Interlocking
Connector (optional)
Housing
Polished Aluminum Reflector
Element
Terminal Cover
Terminal Block
End Plate
Mounting
Clamp
Assembly
2-3/8”
1-7/8”
1/4”
Figure 2
Figure 3
3-11/16”
2-15/16”
2-3/8”
Figure 4
Mounting Frame
Insulation
Reflector
Spacer Sheet