ISSUE DATE 12-12-08 REV. DATE 12-12-08 REV. LEVEL: 01 ECN: GP-5179 OIPM P/N 3420466 PG
11
OF
20
OPERATION
When power is provided to these heaters the heater
elements will take several minutes to achieve full
infrared output that can be confirmed by an orange to
dull red glow on the element sheath. The element
sheath under this condition is operating between 1,500
and 1,600° F emitting medium wavelength (approx. 3
microns or millionths of a meter) infrared energy. This
energy, that can also be considered “radiation” is not
harmful, yet is very effective at heating objects and
surfaces that are within the line-of-sight of the elements
and the heater’s reflective surfaces.
When power is provided or removed from these
heaters, you may hear unfamiliar sounds that are caused
by the expansion and contraction of metal components
in the heater. This is normal.
There are no on/off switches, tip-over switches or over-
temperature safety cut out devices included on any of
these heaters. See the Accessories section of this
manual for more details.
FIRE HAZARD
BURN HAZARD
•
Serious injury or death
may occur.
•
Always operate heaters on
level surfaces.
•
Allow heater to fully cool
after power is removed
before touching or
working on it.
•
Do not leave heaters
unattended while in
operation
•
Maintain minimum
clearances to combustibles
as shown in table below.
MODEL
REQUIRED CLEARANCES
TO COMBUSTIBLES
FROM FRONT OF HEATER
FHK-212-1CA
2 Feet
FHK-2
3 feet
FHK-4
3 Feet
FHK-6
4 Feet
FHK-13
7 Feet
If any metal-sheath element has an obvious
“bowing” or sagging condition during
operation, an over-voltage / over-
temperature condition may exist. De-
energize the heater immediately and allow to
fully cool. Replace all elements that have
been distorted in any way. Before returning
power to heaters, make certain the power
supply voltage is no more than 2% above the
rating on the heater data label.
