Desa Tech 12-IR, 24-IR, 24-IRP, 36-IR, 48-IR Owner's Manual
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TYPE OF GAS...........................For use with Propane Only
INPUT RATING....................................12-IR 11,000 BTU/hr
.............................24-IR/24-IRP 22,000 BTU/hr
........................................36-IR 33,000 BTU/hr
........................................48-IR 44,000 BTU/hr
MANIFOLD PRESSURE..........................28" Water Column
ORIFICE SIZE....................................................No. 69 Drill
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WARNING: Improper installation, alteration,
service or maintenance can cause property damage,
injury, or death. Read the installation operating and
maintenance instrucitons thoroughly before installing or
servicing this equipment.
OPERATING INFORMATION
This is a propane, direct-fired, heater. It's intended use is
primarily temporary heating of buildings under construction,
alteration or repair.
WARNING:
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NOT FOR HOME OR RECREATIONAL VEHICLE USE
Propane is heavier than air. If propane leaks from a connection or fitting, it sinks to the floor, collecting there with the
surrounding air, forming a potentially explosive mixture.
Obviously, propane leaks should be avoided, so set up the
propane supply with utmost care. Leak check new connections or reconnections with a soap and water solution and
follow all connection instructions herein. Also ask your
propane dealer for advice on the propane supply installation
and ask him to check it if there are any questions.
Direct-fired means that all of the combustion products from
burning propane enter the heated space. Even though this
heater operates very close to 100 percent combustion efficiency, it still produces small amounts of carbon monoxide.
Carbon monoxide (called CO) is toxic.
CO can build up in a heated space and failure to provide
adequate ventilation could result in death. The symptoms of
inadequate ventilation are:
headache
dizziness
burning eyes and nose
nausea
dry mouth or sore throat
So, be sure to follow advice about VENTILATION in these
operating instructions.
SCHEU PRODUCTS COMPANY, INCORPORATED
Mail: P.O. Box 5050, Upland, CA 91785-5050
Plant: 8855 Baker Ave., Rancho Cucamonga, CA 91730
ASSEMBLY AND OPERATING INSTRUCTIONS
UNIVERSAL MODELS 12-IR, 24-IR, 24-IRP, 36-IR, 48-IR
ALL PRO MODELS SPC-12, SPC-24, SPC-24P, SPC-36, SPC-48
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FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH THIS HEATER, CAN RESULT IN DEATH,
SERIOUS BODILY INJURY AND PROPERTY LOSS OR DAMAGE
FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION,
AND CARBON MONOXIDE POISONING.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE
INSTRUCTIONS SHOULD USE OR SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS
AN INSTRUCTIONS MANUAL, LABELS, ETC. CONTACT THE
MANUFACTURER.
TELEPHONE: 909 981-5343
INFRA-RED HEATERS
GENERAL HAZARD WARNING:
SAFETY PRECAUTIONS
1. Check the heater thoroughly for damage. DO NOT operate a
damaged heater.
2. Do not modify the heater or operate a heater which has
been modified from its original condition.
3. Use only propane gas.
4. Use only VAPOR WITHDRAWAL propane cylinders. If there
is any question about vapor withdrawal, ask your propane
dealer.
5. Mount propane cylinders vertically (shutoff valve up). Secure
them from falling or being knocked over and protect them
fromdamage.
6. Do not direct heat toward propane cylinders.
7. Use only the hose and regulator assembly provided with the
heater. Inspect hose assembly before each use of the
heater. If there is excessive abrasion or wear, or hose is
cut, replace with hose assembly listed on parts list before
using heater. The hose and fittings shall be protected
from damage and deterioration.
8. For indoor or outdoor use. AREA MUST BE WELL VENTILATED. Provide minimum openings of 1 sq. ft. near the floor
and 1 sq. ft. near the ceiling (also see "Operating Information").
9. If at any time gas odor is detected, IMMEDIATELY DISCONTINUE operation until the source of gas has been located
and corrected.
10. Install the heater such that it is not directly exposed to water
spray, rain, dripping water and/or wind.
11. Maintain minimum clearance from normal combustible
materials (like paper) as follows: rear-2 ft.; sides-3 ft.;
front-6 ft. Locate 10 ft. from canvas or plastic tarpaulins or
similar coverings and secure them to prevent flapping or
movement due to wind action.
12. Operate only on a stable, level surface.
13. Since permanent skin tissue damage can occur, avoid
contact with the unit while it is operating or shortly after it
has been shut off.
14. Operate the unit in a draft-free area or protect the heater
fromdrafts.
15. Do not move, handle or service while hot or burning.
16. Use only in accordance with local codes or, in the absence
of local codes, with the Standard for the Storage and
Handling of Liquefied Petroleum Gases ANSI/NFPA 581998, and National Fuel Gas Code ANSI Z223.1/NFPA
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WARNING; FIRE, BURN, INHALATION, AND EXPLOSION HAZARD. KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING MATERIALS,
PAPER OR CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY THE INSTRUCTIONS NEVER USE THE
HEATER IN SPACES WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE,
SOLVENTS, PAINT THINNER, DUST PARTICLES OR UNKNOWN CHEMICALS.
OPERATING INSTRUCTIONS
PREPARING FOR OPERATION
1. Inspect the heater for possible shipping damage. If any
is found, immediately notify the dealer.
2. Follow all of the “Safety Precautions” and “Operating
Information" on page 1, and “Propane Fuel Information” on page 4.
3. Refer to the exploded view on page 3 for general
assembly layout. Regulator: Heater is to be hooked up
to the regulator (set at 28” water column) supplied with
the heater.
4. HEATER ASSEMBLY:
a) Lay the heater reflector down down on a flat level
surface (the manifold mounting lug will be up).
b) Attach the manifold to the burner/reflector assem-
bly as shown in the exploded view.
c) Be sure that the neck(s) of the manifold are
pushed al l of t h e w ay i n t o t he o n e ( 1) inch tube(s)
of the burner assembly(s).
d) Position and tighten the adapter clamp(s).
e) The manifold mounting lug (the rectangular piece
of 1/8” thick steel that is welded to the manifold)
must face the direction shown in the exploded
view.
f) Attach the loose thermocouple end to the connec-
tion at the thermoelectric valve.
g) Tighten the connection finger tight, then tighten an
additional maximum ¼ turn using a 3/8” open end
wrench.
5. If you have the 24,000 BTU w/Piezo (all others go to
step7):
a) Place the piezo mounting bracket with the attach
ment surface on the left side of the manifold
mounting lug, the piezo bracket will cross over the
lug.
b) Lineup the mounting holes on the piezo bracket
and the lug, then securely attach the piezo bracket
to the lug with the two 10-24x3/8 machine screws
and hex nuts provided.
c) Insert the loose end of the electrode wire onto the
terminal on the piezo igniter.
6. HEATER MOUNTING (for Quad Heater go to step 7):
a) Assemble the flattened end of the heater support
to the manifold mounting lug with a lock bolt (3/816 x 1 ¼ bolt).
b) Place the 3/8-16 whiz nut onto the remaining 3/8-
16 x 1 ¼ bolt, with the nut serrations away from the
bolt head.
c) Attach the lock bolt assembly into the remaining
base support weld nut, making sure that the nut
serrations face the base support.
d) Mount the heater onto a standard 20 or 40 #
propane cylinder by placing the slot in the heater
support over the propane cylinder flange. Tighten
the lock bolt assembly, then secure with the nut.
7. QUAD-HEAD HEATER MOUNTING
a) Mount the quad-head heater onto a 100# cylinder
Page 2
by placing the collar assembly over the threaded
neck (for cylinder valve cover) and tighten the wing
nut.
b) Place the slot in the heater support over the propane
cylinder flange.
c) Tighten the lock bolt assembly, then secure with the
nut.
8. Check the ‘O’ ring on the POL before each use (see page
4). Replace the ‘O’ ring if there is any sign of ware or
damage.
9. After the heater is securely attached to the propane
cylinder connect the POL fitting of the hose and regulator
assembly to the propane cylinder by rotating the POL nut
counterclockwise into the propane cylinder’s valve outlet. Securely tighten with a wrench.
10. Securely tighten all gas connections.
11. Open the cylinder’s gas valve and check all gas connections with a soap and water solution. DO NOT USE A
FLAME.
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WARNING: DO NOT LOOK OVER TOP OF
HEATER (REFLECTOR) DURING IGNITION.
This heater may produce a small puff of flame
during ignition, which could result in serious
bodily injury.
START
1. Fully open the valve on the propane cylinder.
2. Depress the red button on the safety valve admitting gas
to the heater. Place a lighted match near the face of the
ceramic element using the hole located on the side of the
reflector. If the hose is filled with air, allow a few seconds
for gas to reach element. DO NOT LIGHT AT THE
ORIFICE.
3. 24-IRP: Depress the red button on the safety valve
admitting gas to the heater. Push and release the
piezo ignition button until the gas on the surface of the grid
ignites. this may take several strikes of the piezo.
Ignition may be observed using the holes located on the
sides of the reflector. DO NOT LOOK OVER TOP OF
REFLECTOR! If the hose is filled with air allow a few
seconds for the gas to reach the grids.
4. When the gas on the face of the ceramic element lights,
continue to hold the button depressed for 30 seconds,
then release. On multiple head units, check to see that
all elements are burning.
5. If the flame goes out, wait 5 minutes and repeat the
lighting procedure.
STOP
1. Securely close valve at propane cylinder.
2. Do not attempt to relight for 5 minutes.
RESTART AFTER SAFETY SHUTDOWN
1. Securely close valve at propane cylinder.
2. Wait 5 minutes.
3. Restart following "Start" procedure.
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