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6 |SUNWARMTH
™
CIR INFRARED HEATER WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
INSTALLATION
INSTALLATION
9. Installation
9.1 Project design considerations & guidelines
NOTE: All CIR Infrared Heaters must be installed on a
timer or timer switch.
NOTE: Refer to “9.5 Minimum required clearances”
on page 7 regarding the minimum required
clearances.
The size and quantity of heaters (amount of heat input) required
over an area to provide comfort is affected by the following factors:
9.1.1 General:
— Amount of air movement in the area: “wind chill” requires
additional heat input
—Provide wind breaks wherever possible
— “Spot heating” comfort is most effective if people are heated
from at least two sides
— Available mounting height for heaters at the project site
9.1.2 Indoor application:
— “Space heat” the entire structure (accurate heat loss
calculation required. For assistance contact Stiebel Eltron at
800-582-8423 or info@stiebel-eltron-usa.com), or
— “Spot heat” only part of a cold indoor area
— The activity level of the people: seated at rest, hard physical
labor, etc.
9.1.3 Outdoor application:
NOTE: MODEL CIR 150-1 I IS FOR INDOOR USE ONLY!
— Any area heated outdoors is “spot heat”
— Models CIR 150-1 O, CIR 200-2 O, and CIR 400-2 O are for
indoor or outdoor use
» Desired temperature rise:
— In what seasons is comfort required and what is the outside
design temperature?
— Then what temperature rise is desired for comfort? (10°, 15°,
20°, 25°)
» Calculate the required input to get the desired average
temperature rise:
Input Required per Area per Degree Comfort Temperature Rise
Heat density
per degree F
W/(ft
2
)/°F
Heat density
per degree C
W/(m
2
)/°C
Outdoor heating
(up to 10 mph wind) 2 40
Indoor spot heating
(protected area, low
air movement) 0.75 14
» Input formula = Site Length x Site Width x Temperature Rise x
Heat Density per Degree
Example:
— Outdoor patio: 30 feet long by 10 feet wide
— Desired temperature rise: 20°F (average over the area)
— 30 x 10 x 20 x 2 = 12,000 Watts total input required
Compare the values of the available mounting height and area
dimensions at the project site to the recommended mounting
heights, length and width of coverage area, and typical average
heat distribution in “9.1 Project design considerations & guidelines”
on page 6.
Layout:
— Space the heaters uniformly around the perimeter (and if
required, in the center or throughout the area) to provide
suffi cient heat density to accomplish the desired temperature
rise or spot heat only specifi c locations within the area.
— Provide heat from at least two sides wherever possible
NOTE: The design information presented here is
intended as a guideline. The accuracy of determining
or estimating all factors above will affect performance
and satisfaction. Air movement in particular will
affect comfort.
9.2 General installation instructions
NOTE: Read all instructions and plan the installation
before proceeding.
This appliance conforms to ANSI/UL 1278 or 2021 and is certifi ed
to CAN/CSA C22.2 No.46.
The model CIR 150-1 I is approved for indoor use only. Do not
use this heater in environments such as bathrooms and laundry
rooms. The heater is supplied with an 8 ft (2.4 m) cord with a three
prong plug that must connect to a properly grounded 115–120 V
outlet on a copper wire electrical supply circuit controlled by a
timer switch.
Models CIR 150-2 O, CIR 200-2 O and CIR 400-2 O are approved for
outdoor and indoor use. Do not use these heaters in environments
such as bathrooms and laundry rooms. These models must be
connected to a properly grounded 240 V copper wire electrical
supply circuit(s) controlled by a timer switch. Installation must
conform with the latest edition Electrical Code ANSI/NFPA N0 70
in the U.S.A. and PART 1 CSA C22.1 in Canada.
A mounting bracket suitable for a wall or post is supplied with
the heater. The heater must be mounted to this bracket during
operation. Hardware to fasten the mounting bracket to the
structure is determined by site conditions, and is fi eld supplied
by the installer.
WARNING: Fire
When installing models CIR 150-1 I or CIR 150-1 O avoid
the use of an extension cord because the extension
cord may overheat and cause a risk of fi re. However,
if you must use an extension cord, the cord shall be
No. 14 AWG minimum size and rated not less than 1875
Watts.
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