HeatStar HS125NG, HS125LP Operating Instructions And Owner's Manual

OPERATING INSTRUCTIONS AND OWNER’S MANUAL

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.

MODEL

HS125NG, HS125LP

GAS-FIRED INFRA-RED
PORTABLE CONSTRUCTION HEATER

DO NOT LEAVE HEATER UNATTENDED OR IN OPERATION WHILE SLEEPING

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

01/15 18666 2015 JMHEATSTAR by ENERCO, 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 866-447-2194

SPECIFICATIONS

MODEL NO. .................................. HS125LP .......... HS125NG

GAS TYPE ........................................ LP-Gas ........ Natual Gas

MAX. INLET PRESSURE. ........... 14 IN. W.C. ....... 14 IN. W.C.

MIN. INLET PRESSURE .............. 14 IN. W.C. ....... 14 IN. W.C.

MANIFOLD PRESSURE .............. 12 IN. W.C. .......6.5 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 fuel-burning

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
HS125LP 95 - 125,000* VERTICAL 48” 60” 60”
HS125NG 72 -2125,000 VERTICAL 48” 60” 60”

*Tank size and tank temperature can directly affect BTU output

CONTENTS

Installation Instructions ..................................................... 3

Location ............................................................................ 3

Piping ............................................................................... 3

Operating Instructions ...................................................... 4

Lighting and Shut Down ...................................................4

Maintenance Instructions ..................................................5

Replacement Parts List ...................................................... 6

Service and Parts Ordering Information .............................8

THE STATE OF CALIFORNIA REQUIRES THE FOLLOWING WARNINGS:

FOR YOUR SAFETY

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

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 for temporary heating of
buildings under construction, alteration or repair.

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).

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or

other reproductive harm.

Operating Instructions and Owner’s ManualGas-Fired Infra-Red Portable Construction Heater

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

HS125NG and HS125LP), and with the (U.S) Standard
for the Storage and Handling of Liquefied Petroleum
Gases, ANSI/NFPA 58 (for LP Gas operation, Model
MH125LP, HS125LP), 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 HS125LP 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 HS125LP), 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-Gas container and must not be
directed toward any LP-Gas container within 20 feet.

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 HS125LP
(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
40 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 40 pounds capacity of

LP-Gas.

WARNING

NEVER USE A FORK LIFT TRUCK TYPE
CYLINDER.

The connection of Model HS125LP 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. Check local codes.

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.

For Model HS125NG (for use with natural gas)

Operating Instructions and Owner’s ManualGas-Fired Infra-Red Portable Construction Heater

3

For Model HS125NG (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 INSTRUC TIONS

ODOR FADE WARNING

WARNING

• Do not use in unventilated areas.

• The flow of combustion and ventilation air must

• Proper ventilation air must be provided to

• Refer to the specification section of the heater’s

• Lack of proper ventilation air will lead to

• Improper combustion can lead to carbon

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.

WARNING

Asphyxiation Hazard

IF YOU DO NOT FOLLOW THESE INSTRUCTIONS
EXACTLY, A FIRE OR EXPLOSION MAY RESULT

not be obstructed.

CAUSING PROPERTY DAMAGE, PERSONAL
INJURY, OR LOSS OF LIFE.

support the combustion air requirements of the
heater being used.

CAUTION

manual, heater dataplate, or contact the factory
to determine combustion air ventilation

THIS APPLIANCE IS HOT DURING NORMAL

requirements of the heater.

OPERATION, AVOID PHYSICAL CONTACT.

improper combustion.

monoxide poisoning leading to serious injury or

CAUTION

death. Symptom of carbon monoxide poisoning

DO NOT PLACE CLOTHING OR OTHER

can include headaches, dizziness and difficulty

COMBUSTIBLE MATERIALS ON THIS APPLIANCE.

in breathing.

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. ANY
GAS ODOR IS YOUR SIGNAL TO GO INTO IMMEDIATE

ACTION!

• 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 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.

• 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.

Operating Instructions and Owner’s ManualGas-Fired Infra-Red Portable Construction Heater

4

Piping must be clean and free from scale or burrs.

ATTENTION - CRITICAL POINTS TO

Install regulator supplied with heater. Connect with 1/2” NPT

REMEMBER!

nipple (not included) to Control Valve.

• Propane (LP) gas has a distinctive odor. Learn to

Connect the appliance to an appropriately designed and

recognize these odors. (Reference Fuel Gas Odor and

installed fuel supply system. This system must include an

Odor Fading sections above.

approved manual shut-off valve which is readily accessible and

• Even If you are not property trained in the service and

is located within six (6) feet of the appliance. Additionally, a

repair of the heater, ALWAYS be consciously aware of

sediment trap or drip leg must be located upstream of this

the odors of propane (LP) gas and natural gas.

manual shut-off valve. Refer to the appropriate (natural gas)

• If you have not been properly trained in repair and

installation code noted above. If a flexible connector is used,

service of propane (LP) gas then do not attempt to

it must be of an approved type.

light heater, perform service or repairs, or make any

Before attempting to ignite the appliance, all gas fittings and

adjustments to the heater on the propane (LP) gas fuel

connections must be thoroughly checked for gas leaks. Apply a

system.

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

OPERATING INSTRUC TIONS

leakage. Dry all fittings and connections after leak testing.

WARNING

WARNING

IF YOU DO NOT FOLLOW THESE INSTRUCTIONS

NEVER USE A FLAME FOR GAS LEAK TESTING.
EXACTLY, A FIRE OR EXPLOSION MAY RESULT

CAUSING PROPERTY DAMAGE, PERSONAL

OPERATING INSTRUC TIONS

INJURY, OR LOSS OF LIFE.

WARNING

CAUTION

IF YOU DO NOT FOLLOW THESE INSTRUCTIONS

THIS APPLIANCE IS HOT DURING NORMAL
EXACTLY, A FIRE OR EXPLOSION MAY RESULT

OPERATION, AVOID PHYSICAL CONTACT.
CAUSING PROPERTY DAMAGE, PERSONAL
INJURY, OR LOSS OF LIFE.

CAUTION

DO NOT PLACE CLOTHING OR OTHER

CAUTION

COMBUSTIBLE MATERIALS ON THIS APPLIANCE.
THIS APPLIANCE IS HOT DURING NORMAL

OPERATION, AVOID PHYSICAL CONTACT.

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.

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.

CAUTION

DO NOT PLACE CLOTHING OR OTHER
COMBUSTIBLE MATERIALS ON THIS APPLIANCE.

LIGHTING AND SHUT DOWN

Lighting the Heater

1 Before attempting to 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. 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 Depress knob then 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.

6a 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 “ON” position to light burner.

or...

6b 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 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.”

7. Turn the gas valve knob counter-clockwise to the “ON”
position (see Fig. 1). The burner will light. Turn knob
clockwise until stop for low fire position.

8. IMPORTANT: DO NOT attempt to adjust the main
burner input beyond stop, for this may cause the pilot

and thermocouple to shut down the burner (Fig. 2).

Operating Instructions and Owner’s ManualGas-Fired Infra-Red Portable Construction Heater

5

OPERATING INSTRUCTIONS AND OWNER’S MANUAL

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.

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 Mr. Heater or HeatStar local
dealer or direct from the factory

FOR INFORMATION REGARDING SERVICE

Please call Toll-Free 866-477-2194
www.enerco.com • www.heatstarbyenerco.com
Our office hours are 8:00 AM – 5:00 PM, EST, Monday through Friday.

Please include the model number, date of purchase, and description of problem in
all communication.

MODEL

HS125NG, HS125LP

WARRANTY

Gas Fired Infra Red Portable Construction Heater HS125NG & HS125LP

HEATSTAR by ENERCO warrants that Infra Red Heaters manufactured and sold will be free

from defects in material and workmanship.

Parts assemblies controls, etc. furnished by HEATSTAR by ENERCO will carry a one (1) year
warranty on the applicable warranties of the suppliers.

The sole responsibility of HEATSTAR by ENERCO under this warranty shall be to replace or
repair any part for which a written claim is made to HEATSTAR by ENERCO within the time

limit of this warranty which is returned upon request to HEATSTAR by ENERCO – F.O.B.
Cleveland Ohio – or F.O.B. an HEATSTAR by ENERCO authorized service facility and which is

proved to be defective upon inspection by HEATSTAR by ENERCO Technical Products.

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 HEATSTAR by ENERCO for parts or products sold by HEATSTAR
by ENERCO, including consequential or special damages.

HEATSTAR by ENERCO reserves the right to make changes at any time, without notice

or obligation, in colors, specifications, accessories, materials and models.

PRODUCT REGISTRATION: Thank you for your purchase.
Please log in to http://www.egiregistration.com to register your product.

HEATSTAR by ENERCO, 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 866-447-2194
Enerco and Mr. Heater are registered trademarks of Enerco Group, Inc.

© 2015, Enerco/Mr. Heater. All rights reserved

ANSI Z83.7b/CSA 2.14b - 2009