OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
Model # 125-R / 125-RN
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instructions in a safe
place for future reference. Do not allow anyone who has not read these instructions to assemble,
light, adjust or operate the heater.
GAS-FIRED INFRA-RED
PORTABLE CONSTRUCTION HEATER
DO NOT LEAVE HEATER UNATTENDED OR IN OPERATION WHILE SLEEPING
CYLINDER NOT INCLUDED
GENERAL HAZARD WARNING:
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, CARBON MONOXIDE POISONING, AND/OR
ELECTRICAL SHOCK.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS SHOULD USE OR
SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS INSTRUCTION MANUALS, LABELS,
ETC., CONTACT THE MANUFACTURER.
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.
WARNING: NOT FOR HOME OR RECREATIONAL VEHICLE USE
04/03 Revision L1 #18666
SPECIFICATIONS
MODEL NO................................125-R.............125RN
GAS TYPE ................................ LP-Gas...... Natual Gas
MAX. INLET PRESSURE. ... 14 IN. W.C...... 14 IN. W.C.
MIN. INLET PRESSURE .. 13.5 IN. W.C........ 7 IN. W.C.
MANIFOLD PRESSURE .. 12.5 IN. W.C......... 6 IN.W.C.
WARNING
DO NOT EXCEED ½ psi (14” w.c.) GAS
PRESSURE TO THE GAS CONTROL VALVE.
VENTILATION
WARNING
THIS APPLIANCE IS UNVENTED AND MUST BE
USED ONLY IN A WELL VENTILATED AREA.
The flow of combustion and ventilation air must not be
obstructed. DO NOT use in a tightly enclosed area.
Any combustion process requires and consumes oxygen, and
may produce carbon monoxide. This heater must be operated
with adequate ventilation. Two openings directly to the outdoors
must be provided, one low and one high, preferably on opposite
sides of the area to be heated. Each of these openings must
provide at least three square inches of combustion air-intake area
and exhaust outlet area for every 1000 BTUs per hour of heater
input rate in order to complete the combustion/ventilation
process. Provide additional ventilation for any additional fuelburning appliances and/or additional occupants.
CLEARANCE (Minimum clearances to combustible materials)
Do not exceed the gas supply pressures shown on rating plates. The maximum inlet gas supply pressures and minimum inlet supply
pressures (for purposes of input adjustment) for LP-Gas and Natural gas are shown as follows:
MODEL NO. BTU/HR RATING NORMAL OPERATING CLEARANCES TO
TYPE GAS POSTION COMBUSTIBLES
NATURAL LP-GAS TOP SIDES BACK
125-R
125,000* VERTICAL 48” 60” 60”
125RN 125,000 VERTICAL 48” 60” 60”
*Tank size and tank temperature can directly affect BTU output
CONTENTS
FOR YOUR SAFETY
Installation Instructions .................................................. 3
Location ....................................................................... 3
Piping .......................................................................... 3
Odor Fading Warning................................................4
Operating Instructions .................................................. 5
Lighting and Shut Down ............................................... 5
Maintenance Instructions ............................................. 6
Replacement Parts List ............................................... 7
Service and Parts Ordering Information ........................ 9
Do not use this heater in a space where
gasoline or other liquids having flammable
vapors are stored or used.
The heater is designed and approved for use as a construction
heater under ANSI Z83.7 / CGA 2.14 - 2000
We cannot anticipate every use which may be made of our
heaters. CHECK WITH YOUR LOCAL FIRE SAFETY AUTHORITY IF
YOU HAVE QUESTIONS ABOUT APPLICATIONS.
Other standards govern the use of fuel gases and heat producing
products in specific applications. Your local authority can advise
you about these.
This appliance is intended to be used primarily for the heating of
buildings under construction, alteration or repair.
THE STATE OF CALIFORNIA REQUIRES THE FOLLOWING WARNING:
WARNING
Combustion by-products produced when using this product contain
carbon monoxide, a chemical known to the State of California to
cause cancer and birth defects (or other reproductive harm).
Operating Instructions and Owner’s Manual
2
INSTALLATION INSTRUCTIONS
GENERAL:
READ THESE INSTRUCTIONS CAREFULLY. Read and adhere
to these instructions. DO NOT allow anyone who has not
read these instructions to assemble, light, adjust or operate
this heater.
DO NOT attempt to operate the heater with any gas other
than that indicated on the heater nameplate.
For the U.S. and/or Canada, the installation of this appliance
must comply with local and/or Provincial codes or, in the
absence of these codes,
• With the (U.S.) National Fuel Gas Code, ANSI Z223.1 –
Latest Edition (for Natural and LP-Gas operation,
Models 125-RN, 125-R), and with the (U.S)
Standard for the Storage and Handling of Liquefied
Petroleum Gases, ANSI/NFPA 58 (for LP Gas
operation, Model 125-R), or
• with the current (Canadian) CAN/CGA B149.1 AND
B149.2 INSTALLATION CODES.
This heater (including hose and regulator assembly if applicable)
must be inspected before each use and at least annually by a
qualified service person. If the hose for Model 125-R shows
evidence of excessive abrasion or wear, or if the hose is
cut, it must be replaced prior to the heater being put into
operation. The replacement hose assembly shall be that
specified by the manufacturer. See the parts list.
LOCATION
The heater (and LP-Gas supply cylinder if applicable) must be
located on a hard, flat, level surface to minimize the risk of
accidental tipping. If an LP Gas supply cylinder is used (i.e. with
Model 125-R), the cylinder should be adequately restrained
to prevent accidental tipping. DO NOT operate this heater
with the supply cylinder in any other than the upright
position.
This appliance must be installed only in locations where the
potential for physical damage to the appliance (i.e., due to
physical contact) is reduced to a minimum.
The installer must inform the owner/operator of this appliance
that precautions must be taken to protect the appliance from
physical damage.
This appliance produces radiant heat. Therefore, it must be
located at least six feet away from any LP-Gascontainerand
ust not be directed toward any LP-Gas container within 20
feet.
Due to high surface and exhaust temperatures, adults and
children must observe clearances to avoid burns or
clothing ignition.
The heater must be installed in a location such that it will
not be exposed directly to water spray, rain, and/or dripping
water.
Use of this heater in a draft/windy area decreases its
efficiency. If possible, operate the unit in a draft free area.
PIPING
For Model 125-R
(for use with LP-Gas)
This model may be connected to a self-contained LP-Gas
supply system using the hose and regulator assembly
supplied with the appliance, OR, it may be connected to a
permanently installed LP-Gas supply system.
If connected to a self-contained LP-Gas supply system,
the hose assembly must be inspected prior to each
use of the heater. If it is evident that there is excessive
abrasion or wear, or if the hose is cut, it must be
replaced prior to the heater being put into operation.
If connected to a self-contained LP-Gas supply system,
the cylinder must have no less than a minimum
capacity of 20 pounds and no more than a maximum
capacity of 100 pounds of LP-Gas. DO NOT connect
this appliance to a cylinder having less than a nominal
20 pounds capacity of LP-Gas. DO NOT connect this
appliance to more than one (1) 100 pound cylinder.
WARNING
NEVER USE A FORK LIFT TRUCK TYPE
CYLINDER.
The connection of Model 125-R to an LP-Gas cylinder must
be made in a well ventilated area using the regulator and
hose assembly supplied with the appliance. DO NOT
attempt to adjust this regulator. It has been preset at the
factory to provide safe and proper operation of the
appliance. Use a 7/8” open end wrench to connect the POL
fitting (supplied with the LP regulator) to the LP-Gas cylinder.
Turn the POL nut in a counter-clockwise direction (left hand
thread) until tight. DO NOT use pipe compound
on POL threads.
The heater must be located at least six feet away from any
LP-Gas cylinder and must not be directed toward any LP-Gas
cylinder within 20 feet. If more than one heater is used,
they and the supply cylinders must be separated by at least
20 feet.
The gas supply must be turned off at the LP-Gas supply
cylinder when the heater is not in use.
When the heater is to be stored indoors, the connection
between the LP-Gas supply cylinder and the heater must be
disconnected and the cylinder removed from the heater and
stored in accordance with Chapter 5 of the Standard for the
Storage and Handling of Liquefied Petroleum Gases. ANSI/
NFPA 58 (U.S.) OR CAN/CGA B149.2 (Canada).
If connected to a permanently installed LP-Gas supply
system, the system requires the use of a two-stage
gas regulator assembly which is normally provided by
your LP Gas dealer as part of the LP-Gas supply
system. Consult with your local LP Gas dealer for
details concerning proper equipment and installation.
Operating Instructions and Owner’s Manual
3
ODOR FADE WARNING
WARNING
Asphyxiation Hazard
• Do not use this heater for heating human living quarters.
• Do not use in unventilated areas.
• The flow of combustion and ventilation air must not be
obstructed.
• Proper ventilation air must be provided to support the
combustion air requirements of the heater being used.
• Refer to the specification section of the heater’s manual,
FUEL GAS ODOR
LP gas and natural gas have man-made odorants added specifically for detection of fuel gas leaks.
If a gas leak occurs you should be able to smell the fuel gas. Since Propane (LP) is heavier than air you should smell for the gas
odor low to the floor.
• Do not take any action that could ignite the fuel gas. Do not
operate any electrical switches. Do not pull any power
supply or extension cords. Do not light matches or any other
source of flame. Do not use your telephone.
• Get everyone out of the building and away from the area
immediately.
• Close all propane (LP) gas tank or cylinder fuel supply
valves, or the main fuel supply valve located at the meter if
you use natural gas.
• Propane (LP) gas is heavier than air and may settle in low
ANY GAS ODOR IS YOUR SIGNAL TO GO INTO IMMEDIATE ACTION!
heater dataplate, or contact the Scheu Products Company to
determine combustion air ventilation requirements of the
heater.
• Lack of proper ventilation air will lead to improper
combustion.
• Improper combustion can lead to carbon monoxide
poisoning leading to serious injury or death. Symptom of
carbon monoxide poisoning can include headaches
dizziness and difficulty in breathing.
areas. When you have reason to suspect a propane leak,
keep out of all low areas.
• Use your neighbor’s phone and call your fuel gas supplier
and your fire department. Do not re-enter the building or
area.
• Stay out of the building and away from the area until
declared safe by the firefighters and your fuel gas supplier.
• FINALLY, let the fuel gas service person and the firefighters
check for escaped gas. Have them air out the building and
area before you return. Properly trained service people must
repair any leaks, check for further leakages, and then relight
the appliance for you.
ODOR FADING - NO ODOR DETECTED
• Some people cannot smell well. Some people cannot smell
the odor of the man-made chemical added to propane (LP)
or natural gas. You must determine if you can smell the
odorant in these fuel gases.
• Learn to recognize the odor of propane (LP) gas and natural
gas. Local propane (LP) gas dealers will be more than
happy to give you a scratch and sniff pamphlet. Use it to
become familiar with the fuel gas odor.
• Smoking can decrease your ability to smell. Being around
an odor for a period of time can affect your sensitivity to that
particular odor. Odors present in animal confinement
buildings can mask fuel gas odor.
ATTENTION - CRITICAL POINTS TO REMEMBER!
• Propane (LP) gas has a distinctive odor. Learn to recognize
these odors. (Reference Fuel Gas Odor and Odor Fading
sections above.
• Even If you are not property trained in the service and repair
of the heater, ALWAYS be consciously aware of the odors of
propane (LP) gas and natural gas.
• If you have not been properly trained in repair and service of
propane (LP) gas then do not attempt to light heater,
perform service or repairs, or make any adjustments to the
heater on the propane (LP) gas fuel system.
• The odorant in propane (LP) gas and natural gas is
colorless and the intensity of its odor can fade under
some circumstances.
• If there is an underground leak, the movement of gas
through the soil can filter the odorant.
• Propane (LP) gas odor may differ in intensity at different
levels. Since Propane (LP) gas is heavier than air, there
may be more odor at lower levels.
• Always be sensitive to the slightest gas odor. If you
continue to detect any gas odor, no matter how small, treat it
as a serious leak. Immediately go into action as discussed
previously.
• A periodic sniff test around the heater or at the heater’s
joints; i.e. hose, connections, etc., is a good safety practice
under any conditions. If you smell even a small amount of
gas, CONTACT YOUR FUEL GAS SUPPLIER IMMEDIATELY.
DO NOT WAIT!
Operating Instructions and Owner’s Manual
4
For Model 125-RN (for use with natural gas)
Piping must be clean and free from scale or burrs.
Install regulator supplied with heater. Connect with 1/2”
NPT nipple (not included) to Control Valve.
Connect the appliance to an appropriately designed and
installed fuel supply system. This system must include an
approved manual shut-off valve which is readily accessible
and is located within six (6) feet of the appliance.
Additionally, a sediment trap or drip leg must be located
upstream of this manual shut-off valve. Refer to the
appropriate (natural gas) installation code noted above. If a
flexible connector is used, it must be of an approved type.
Before attempting to ignite the appliance, all gas fittings and
connections must be thoroughly checked for gas leaks. Apply a
small amount of a mild soap and water solution to all fittings
and connections and observe for escaping bubbles. If any leaks
are detected, shut off the gas supply to the appliance
immediately. Wait a minimum of five minutes, repair the leak(s)
and retest for leakage. Dry all fittings and connections after leak
testing.
WARNING
NEVER USE A FLAME FOR GAS LEAK
TESTING.
OPERATING INSTRUCTIONS
WARNING
IF YOU DO NOT FOLLOW THESE
INSTRUCTIONS EXACTLY, A FIRE OR
EXPLOSION MAY RESULT CAUSING
PROPERTY DAMAGE, PERSONAL INJURY, OR
LOSS OF LIFE.
CAUTION
THIS APPLIANCE IS HOT DURING NORMAL
OPERATION, AVOID PHYSICAL CONTACT.
CAUTION
DO NOT PLACE CLOTHING OR OTHER
COMBUSTIBLE MATERIALS ON THIS
APPLIANCE. DO NOT MOVE OR
HANDLE HEATER DURING OPERATION
OR UNTIL COMPLETELY COOL.
DO NOT operate this heater if any part has been under
water. Call a qualified service technician to inspect the
appliance and to replace any part of the control system or
gas control valve which has been under water.
This appliance must be installed and operated only in
locations where the potential for physical damage to the
appliance is reduced to a minimum. The owner/operator of
this appliance must ensure that precautions are taken to
protect the appliance from physical damage.
LIGHTING AND SHUT DOWN
Lighting the Heater
1 Before attempting the light the heater, smell all around
the heater area for gas. Be sure to smell next to the
floor because LP Gas is heavier than air and will settle
on the floor. Turn on the gas supply to the appliance
and check all fittings and connections for gas leaks
using a mild soap and water solution. Read
enclosed Odor Fade and Propane Sheet for
additional information about detecting propane
leaks. NEVER use a match to check for gas
leaks. Should a gas leak occur, shut off the gas
supply to the appliance immediately. Wait a
minimum of five minutes before repairing the leak.
2 Use only the fuel intended for this appliance.
Check the appliance rating plate for the correct
fuel information.
3 Turn the gas valve knob clockwise to the “OFF”
position. See Fig. 1 and Fig. 2 for location of appliance
parts.
4 Wait a sufficient length of time (at least five minutes)
to allow gas which may have accumulated in burner
compartment to escape.
5 Turn on the main gas supply.
6 Turn the gas valve knob counter-clockwise to the
“PILOT” position (see Fig. 1).
7a Depress and turn Control Knob counterclockwise to
“Pilot” position and hold for 1-2 minutes. This may take
longer to purge air from the supply hose depending on
the length of the hose being used.
Depress red spark ignition button to light pilot flame
(repeat until pilot lights) and continue to hold Control
Knob at “Pilot” positionfor 30-60 seconds to enable
Pilot Light Safety System.
Fully turn Control Knob to “Hi” position to light burner. or ...
7b To light the pilot, move the lighting hole cover aside
(see Fig. 1) and place a lighted match into the hole.
Depress the gas valve knob and hold while lighting and
observing the pilot burner. Ensure that the pilot burner
ignites from the match. Allow the pilot to burn
approximately 30 seconds before releasing the gas
Operating Instructions and Owner’s Manual
5
valve knob. If pilot does not remain lighted, repeat
the lighting operation allowing a longer period of
time before releasing the gas valve knob.
NOTE: In cases where long runs of gas supply lines
have been installed ahead of the appliance, it may be
necessary to bleed trapped air out of the supply lines
before lighting the pilot. New installations generally
require bleed of supply lines. Wait a minimum of five
minutes after bleeding the supply lines before
attempting to light the heater.
Adjust pilot if necessary as noted under “Pilot Burner
Adjustment.”
8. Turn the gas valve knob counter-clockwise to the
“ON” position (see Fig. 1). The burner will light. DO
NOT operate the heater in any other than the full
“ON” position.
9. IMPORTANT: DO NOT attempt to adjust the main
burner input using the main gas supply valve, for
this may cause the pilot and thermocouple to shut
down the burner (Fig. 2).
Shut-down instructions:
To turn the heater OFF,
• For short periods of time, turn the main burner off by
rotating the gas valve knob clockwise to the “PILOT”
position.
• For extended periods of non use, turn the appliance
completely off by rotating the gas valve knob clockwise
to the “PILOT” position, depress the knob slightly, then
rotate the knob fully clockwise to the “OFF” position.
(Note: For Model 125-R, also turn off the gas
supply cylinder.)
Pilot burner adjustment:
1. Remove the pilot adjustment cap. The pilot adjustment
cap is a slotted screw located in front of the “Pilot”
designation stamped on top of valve body just below
the gas valve knob.
2. Adjust the pilot key to provide properly sized flame.
Rotate the key “clockwise” to decrease or “counterclockwise” to increase flame.
3. Replace the pilot adjustment cap.
heater being put into operation. The replacement hose
assembly shall be that specified by the manufacturer. See
the parts list.
The appliance area must be kept free and clear of
combustible materials, gasoline and other flammable
vapors and liquids at all times.
The flow of combustion and ventilation air must not be
obstructed.
Cleaning the heater:
Periodically, the heater must be cleaned of all dirt and dust
particles.
DANGER
DO NOT ATTEMPT TO CLEAN THE HEATER
WHILE IT IS OPERATING OR WHILE IT IS STILL
HOT.
Turn the heater off and wait until it has completely cooled (at
least 20minutes) before cleaning.
Clean the outside of the heater using a damp cloth. DO NOT
clean the heater by spraying water on it. Wipe the outside of the
heater off with a dry cloth after cleaning.
Clean the inside of the heater using compressed air. Blow air
back and forth along all inside surfaces until all dust has been
dislodged.
Clean the orifice of each burner with a #69 drill bit (for LP-Gas).
Clean the orifice manually (by hand) – DO NOT use power drill.
Clean the thermocouple lead.
DO NOT operate this heater if any part has been under
water. Call a qualified service person to inspect the
appliance and to replace any part of the control system or
gas control valve which has been under water.
This heater must be inspected at least annually by a qualified
service person.
WARNING
Do not exceed ½ PSI gas pressure to
appliance gas control valve.
MAINTENANCE INSTRUCTIONS
This heater (including hose and regulator assembly if applicable)
must be inspected before each use. If the hose for the
Model 125-R shows evidence of excessive abrasion or
wear, or if the hose is cut, it must be replaced prior to the
Operating Instructions and Owner’s Manual
6
Figure 1
REPLACEMENT PARTS LIST FOR
MODELS 125-R / 125-RN
SEE BACK PAGE FOR PARTS ORDERING INFORMATION
REF. # ITEM # DESCRIPTION
1 ..................... 00332 .......... Manual Control Valve
2 ..................... 04466 .......... Filter/Diffuser
3 ..................... 05363 .......... Orifice Pilot(125-R)
4 ..................... 09352 .......... Thermocouple
5 ..................... 11357 .......... Pilot Burner
6 ..................... 11695 .......... Regulator (125-R)
7 ..................... 11666 .......... Regulator (125-RN)
8 ..................... 05374 .......... Orifice Pilot (125-RN)
9 ..................... CR805 ......... Ignitor
Figure 2
10 ................... CR835 ......... Piezo
11.................... CR820......... Axle
12 ................... CR815 ......... Axle Brackets
13 ................... CR810 ......... Wheel
Operating Instructions and Owner’s Manual
7
Combustion Chamber
GAS-FIRED INFRA-RED PORTABLE CONSTRUCTION HEATER
MODELS 125-RN / 125-R
Frame Assembly
Top Plate
12
11
Mounting Bracket
5
4
Pilot Supply Tube
7
9
10
3
8
6
2
13
Propane Hose
Pressure Test Port
1
Operating Instructions and Owner’s Manual
8
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
Model # 125-R / 125-RN
WARNING:
USE ONLY MANUFACTURER’S REPLACEMENT PARTS. USE OF ANY OTHER PARTS
COULD CAUSE INJURY OR DEATH. REPLACEMENT PARTS ARE ONLY AVAILABLE
DIRECT FROM THE FACTORY AND MUST BE INSTALLED BY A QUALIFIED
SERVICE AGENCY.
PARTS ORDERING INFORMATION:
PURCHASING: Accessories may be purchased at any Scheu Products Co.
local dealer or direct from the factory
FOR INFORMATION REGARDING SERVICE
Please call Toll-Free 888-619-7060
E-Mail Address: php@scheuco.com
Our office hours are 7:00 AM – 4:00 PM, CT, Monday through Friday.
Please include the model number, date of purchase, and description of problem
in all communication.
WARRANTY
Gas Fired Infra Red Portable Construction Heater 125-RN & 125-R.
Scheu Products Co.. warrants that Infra Red Heaters manufactured and sold will be
free from defects in material and workmanship.
Parts assemblies controls, etc. furnished by Scheu Products Co. will carry a one (1)
year warranty on the applicable warranties of the suppliers.
The sole responsibility of Scheu Products Co. under this warranty shall be to replace
or repair any part for which a written claim is made to Scheu Products Co.. within the
time limit of this warranty which is returned upon request to Scheu Products Co.
F.O.B. Rancho Cucamonga, CA. or F.O.B. an Scheu Products Co.. authorized
service facility and which is proved to be defective upon inspection by Scheu
Products Co..
This warranty shall not apply to any part or product which has been subjected to
misuse or neglect, damaged by accident, or rendered defective by reason of
improper installation. THIS WARRANTY IS IN LIEU OF ANY AND ALL OTHER
WARRANTIES, EXPRESSED OR IMPLIED, and of any other responsibility of Scheu
Products Co. for parts or products sold by Scheu Products Co., including
consequential or special damages.
Scheu Products Co. reserves the right to make changes at any time, without
notice or obligation, in colors, specifications, accessories, materials and models.
Operating Instructions and Owner’s Manual
9
ANSI Z83.7/CGA 2.14-2000
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