Enerco MHU 75, MHU 45 User Manual

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Page 1

OPERATING INSTRUCTIONS AND OWNER’S MANUAL

MR. HEATER

LEDO

MHU 45 MHU

COMPACT UNIT HEATER

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.

LEDO

ATSTAR

HSU 45

HSU

WARNING:

injury or property damage. Refer to this manual. For assistance or additional

cause in

formation consult a qualified installer, service agency or the gas supplier.

— WHAT TO DO IF YOU SMELL GAS

• Open Windows

• DO NOT try to light any appliance.

• DO NOT use electrical switches.

• DO NOT use any telephone in your house. Immediately call your local gas supplier from a

neighbor’s telephone. Follow the gas supplier’s instructions.

• Do not touch any electrical switch; do not use any phone in your building.

• Installation and service must be performed by a qualified installer, service agency or the gas

supplier.

• If you cannot reach your gas supplier, call the Fire Department.

Improper installation, adjustment, alteration, service or maintenance can

FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WARNING: If the information in these instructions are not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

03/05 Revision L1 #60016ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-916-3000

Page 2

WARNING:

YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS, SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU

OPERATE THIS HEATER.

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 AN INSTRUCTIONS MANUAL, LABELS, ETC.

CONTACT THE MANUFACTURER.

CONTENTS

UNIT DIMENSIONS ................................................................. 3

SHIPPING ................................................................................ 4

REQUIREMENTS ...................................................................... 4

UNIT HEATER INSTALLATION .................................................. 5

COMBUSTION & VENTILATION AIR ........................................ 5

VENTING ................................................................................. 5

ELECTRICAL CONNECTIONS .................................................... 8

GAS CONNECTION ................................................................. 8

LEAK CHECK ........................................................................... 9

START-UP OPERATION ............................................................. 9

HEATING SEQUENCE OF OPERATION..................................... 10

IGNITION CONTROL LED........................................................ 11

ADJUSTMENTS....................................................................... 11

SERVICE ................................................................................. 12

WIRING DIAGRAM................................................................. 13

PARTS LIST ............................................................................. 14

WARRANTY ........................................................................... 16

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:

The State of California requires the following 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).

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

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AIR

FLOW

HEAT EXCHANGER

(ALUMINIZED STEEL)

MHU45/MHU75 AND HSU45/HSU75 UNIT DIMENSIONS

(N-NATURAL GAS, P-PROPANE)

HANGING

BRACKETS

MOUNTING SLOTS (Typical) 5/16 x 3 Inches (8 x 76 mm)

DIMENSION 45 75

A 12 (305) 17 (432)

B 5-1/2 (140) 6-1/2 (165)

C 4-1/4 (108) 6-3/4 (171)

TOP VIEW

ELECTRIC AL

INLETS

DIRECT

DRIVE FAN

FLUE

OUTLET

GAS

INLET

BACK VIEW

START–UP AND PERFORMANCE CHECK LIST

Job Name: _________________________________________

Job Location: _______________________________________

Installer: __________________________________________

Unit Model No.: ____________________________________

Electrical Connections Tight? ______________________________________________

Supply Voltage __________________________________________________________

Gas Piping Connections Tight & Leak-Tested? _________________________________

Motor Amps ____________________________________________________________

Furnace Btu Input ________________________________________________________

Line Pressure ____________________________________________________________

Manifold Pressure w.c. ____________________________________________________

Job No.: ______________________________________

City: _________________________________________

Serial No.: ____________________________________

HANGING

BRACKETS (2)

ADJUSTABLE

SERVICE

ACCESS PANEL

LOUVERS

SIDE VIEW

Date: ______________________________________

State/Province: ______________________________

Service Technician: ___________________________

Flue Connections Tight? _________________________________________________

Fan Timer Operation Checked? ____________________________________________

THERMOSTAT

Calibrated? ____________________________________________________________

Heat Anticipator Properly Set?

Level? _________________________________________________________________

Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater

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SHIPPING

The heater is completely assembled. Installation instructions, two mounting brackets (shipped loose), and a flue transition are included. Check the unit for shipping damage. The receiving party should contact the last carrier immediately if any shipping damage is found.

REQUIREMENTS – CSA IN THE USA

Installation of gas unit heaters must conform with local building codes or, in the absence of local codes, with the current National Fuel Gas Code ANSI Z223.1.

Installation in aircraft hangers must be in accordance with the current Standard for Aircraft Hangers ANSI/NFPA No. 409.

Installation in parking structures must be in accordance with the current Standard for Parking Structures ANSI/NFPA No. 88A.

Installation in repair garages must be in accordance with the current Standard for Repair Garages ANSI/NFPA No. 88B.

These units are approved for residential applications. For installation in a residential garage these units must be installed so that burners and ignition source are located no less than 18" (457mm) above floor. Heater must be located or protected to avoid physical damage by vehicles. Refer to the National Fuel Gas Code, ANSI Z223.1, current edition.

Authorities having jurisdiction should be consulted before NFPA installation. Air for combustion and ventilation must conform to the methods outlined in ANSI Z223.1, section 5.3, Air for Combustion and Ventilation, or applicable provisions of local building codes. The National Fuel Gas Code is available from:

American National Standard Institute Inc. 11 West 42nd Street New York, NY 10036

These units are CSA International design certified. These unit heaters are certified for installation to combustible material as listed in table 1 and on unit rating plate. Accessibility and service clearances must be observed in addition to fire protection clearances.

All electrical wiring and ground for unit must be in accordance with the regulations of the current National Electric Code ANSI/ No. 70.

The National Electric Code is available from:

National Fire Protection Association 1 Batterymarch Park PO Box 9101 Quincy, MA 02269-9101

TABLE 1

UNIT CLEARANCES

Top Sides Access Panel

in mm in mm in mm

1 25 1 25 18 457

Bottom Rear Single Wall Vent*

in mm in mm in mm

00 184566152

*Except for listed clearance thimbles.

REQUIREMENTS – CSA IN CANADA

The instructions are intended only as a general guide and do not supersede local codes in any way. Authorities having jurisdiction should be consulted before installation. The installation must conform with local building codes or in the absence of local codes, with the current CSA B149.1, Natural Gas and Propane Installation Code. All electrical wiring and grounding for the unit must also comply with the Canadian Electrical Code CSA C22.1, current edition.

These unit heaters are CSA International. certified for the clearances to combustible material listed on the rating plate and table 1. Adequate clearance around air openings into the combustion chamber, clearances from combustible material, and provisions for accessibility and for combustion and ventilation air supply. Provision shall be made for service accessibility to the heater. Note that fire protection clearances may be exceeded to provide additional space for service and accessibility.

GARAGE INSTALLATIONS:

Installation in parking structures must be in accordance with the current Standard for Parking Structures ANSI/NFPA No. 88A.

Installation in repair garages must be in accordance with the current Standard for Repair Garages ANSI/NFPA No. 88B.

1. In a storage area, clearance from heaters to combustible materials must be such that the material shall not attain a temperature above 160°F by continuous operation of the unit.

2. Eight foot minimum clearance from the floor to the bottom of the heater must be maintained. Refer to the CSA B149.1, Natural Gas and Propane Installation Code

AIRCRAFT HANGER:

Installation of gas unit heaters must conform with local building codes or, in the absence of local codes, with the current National Fuel Gas Code ANSI Z223.1.

1. In an area where aircraft are housed or serviced, 10' minimum clearance from highest surface of aircraft to bottom of the heater must be maintained.

2. In other areas, 8' minimum clearance from the floor to bottom of heater must be maintained.

3. Heaters should be located so as to be protected from damage from aircraft or other appliances needed for servicing of aircraft. Refer to requirements of the enforcing authorities.

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

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These units are approved for residential applications. For installation in a residential garage, these units must be installed so that burners and

source are located no less than 18” (457mm) above floor. Heater

ignition must

be located or protected to avoid physical damage by vehicles.

Refer to CSA B149.1, Natural Gas and Propane Installation Code current

edition

a confined area, the heater must be installed in accordance with the

In CSA B149.1, Natural Gas and Propane Installation Code. Be sure to check with

local codes and ordinances for additional requirements.

UNIT HEATER INSTALLATION

The installation shall conform with local building codes or, in the absence of local codes, with the

NFPA 54 or the CSA B 149.1, Natural Gas and Propane Installation Code.

The appliance and venting system is to be inspected once a year by a qualified service agency.

Unit is shipped ready for installation. Unit may be installed as sh

governed by clearances, vent connection, air direction, gas

as suppl

1. If installing unit in an inverted position: Remove and retain screws

2. Choose location for mounting brackets.

3. Remove and retain three screws along top edge (bottom edge

4. Align screw holes on mounting bracket with holes along top edge

5. To support unit, secure mounting bracket to ceiling joist or truss.

figure

own in

y, electrical supply and service accessibility.

securing Rotate louvers directing airflow as desired.

when

(either to bracket

containing flue transition.

Unit

door and rotate door 180o. Secure with retained screws.

inverted) of front of unit.

upright or inverted) of unit. Secure one mounting bracket

front of unit with retained screws. Secure other mounting

to back of unit with screws provided in bag assembly

may also hang on rods as shown in

National Fuel Gas Code, ANSI Z223.1 /

or inverted 180

depending on desired location

figure

COMBUSTION AND VENTILATION AIR

Adequate facilities for supplying air for combustion and ventilation must

section 5.3, Air for Combustion and Ventilation, of the

of National Fuel Gas Code, ANSI Z223.1, in the U.S.A., CSA B149.1

Natural Gas and Propane Installation Code in Canada, or

applicable provisions of local building codes.

gas fired appliances require air to be used for the combustion

All process. In many buildings today, there is a negative indoor air pressure caused by exhaust fans, etc. If sufficient quantities of combustion appliance incomplete excessive carbon monoxide.

CAUTION Insufficient combustion air can cause headaches, nausea,

dizziness, asphyxiation or death.

indoor air is to be used for combustion, it must be free of the following substances or the life of the heat exchanger will be adversely halogen fluorides,

refrigerants, acids, cements and glues, printing inks,

be provided in accordance with the latest edition

air are not available, the heater or another

will operate in an inefficient manner, resulting in

combustion which can result in the production of

affected: chlorine, carbon tetrachloride, cleaning solvent,

paint removers, varnishes, or any other corrosives.

VENTING

A – GENERAL RECOMMENDATIONS AND REQUIREMENT

NOTE: The vent is a passageway, vertical or nearly so, used to

nvey flue gases from an appliance, or its vent connector, to the

co outside

atmosphere. The vent connector is the pipe or duct that

connects

Unit requirements of the local utility, the current standards of the (American)

B149.1 Natural Gas and Propane Installation Code, and the following

a fuel-gas burning appliance to a vent or chimney.

heaters must be vented in compliance with all local codes or

National Fuel Gas Code, ANSI Z223.1 or (Canada) CSA

instructions.

MOUNTIN

BRACKETS

INSTALL UNIT HEATER

(2)

FIGURE 1

SUPPORT

RODS

A metal stamped/extruded transition is supplied with this certified

It must not be modified or altered and must be installed on

unit.

outlet of the induced draft blower assembly prior to the

the

ation of the vent or vent connector. Failure to comply with

install

requirement will void the certification of the unit by the

this approval corrosion tightness

agencies. All joints shall be secured with at least two

resistant screws. All joints must be checked for gas

after installation.

TABLE 2

MAXIMUM VENT LENGTHS

HORIZONTAL VENTS

No. of ft m

Elbows

1 25 7.6

2 20 6.1

3 15 4.6

4 10 3.0

5 5 1.5

Maximum length of vent connector not to exceed 30 ft. (9.1m).

Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater

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B – VERTICAL VENTS USING METAL VENT PIPE – COMMERCIAL AND RESIDENTIAL INSTALLATIONS

MHU/HSU compact unit heaters are listed as Category I appliances

1. MHU/HSU unit heaters are to be used with NFPA- or ANSI-

. The vent connector shall be 3" (76 mm) diameter on 45 unit and 4” (100mm) diameter for the 75 unit. In flue

3. Keep the vent connector runs as short as possible with a

4. When the length of a single wall vent, including elbows,

for vertical vent installations.

approved metal where listed the

chimneys, U.L. listed type B-1 gas vents, single wall

pipe, or listed chimney lining system for gas venting

applicable, as well as the modifications and limitations

in figure 2 . Seal single wall vent material according to

section A - General Recommendations and Requirements.

all cases, a

transition piece (supplied) is required to fit over the

outlet of the induced

minimum

number of elbows. Refer to the (American)

draft assembly on the appliance.

National Fuel Gas Code ANSI Z223.1 or (Canada) CSA B149.1 Na

tural Gas and Propane Installation Code for maximum vent

vent connector lengths. Horizontal run of the vent

and connector cann

from the induced draft blower to the chimney/vent

ot exceed the values in table 2 .

exceeds 5 feet (1.5m), the vent shall be insulated along its entire length with a minimum of 1/2" thick foil faced

rglass 1-1/2# density insulation. If a single wall vent is

fibe

in an unheated area it shall be insulated. Failure to do

used so

will result in condensation of flue gases.

C – HORIZONTAL VENTING – GENERAL

Common venting is not allowed when horizontally venting the unit

ater.

minimum horizontal vent length is three feet (914mm).

The

1. If possible, do not terminate the horizontal vent through a wall that exposed to prevailing wind. Exposure to excessive winds can

unit performance. If such a termination is necessary, use a

affect wind block to protect the vent termination from direct wind.

2. Vent termination must be free from obstructions and at least

12" (306mm) above grade level and maximum snow height.

VENT TERMINATION ON SINGLE WALL VENT

SINGLE WALL TERMINATION

ROOF FLASHING

ROOF PITCHED

FROM 0” TO 45”

2”

NOT BE A

SHALL

CONCEALED

DOUBLE

ROOF FLASHING

SPACE

WALL (TYPE B-1) TERMINATION

CLEARANCE

THIMBL

5. The unit may be vented vertically as a single appliance or as a common venting mai connec

vent with other gas-fired appliances. In common

situations, vent connectors for other appliances must

ntain a 4" (100mm) vertical separation between the vent

tors. Refer to common venting tables in the(American)

National Fuel Gas Code ANSI Z223.1 or (Canada) CSA B149.1

Gas and Propane Installation Code for proper vent

Natural

size

6. Clearance to combustible material is 6" (152mm) for single wall vent material except where a listed clearance thimble

Clearance to combustible material for type B-1 vent or

is used. factory-built

chimney is per manufacturer’s instructions.

7. The vent connector shall be supported without any dips or

Vertical vents shall be supported in accordance with

sags.

r listing and manufacturers’ instructions. All horizontal

thei vent connector runs shall have a slope up to the vertical vent of at least 1/4" per foot (1mm per 50mm).

8. All vertical type B-1 vents, single wall vents, or listed chimney

system must be terminated with a listed ventcap or

lining

roof assembly.

listed

9. The vent must extend at least 3' (1m) above the highest point

it passes through a roof of a building and at least 2’

where

higher than any part of a building within a horizontal

(0.6m) distance (American)

of 10' (3.05m) unless otherwise specified by the

National Fuel Gas Code, ANSI Z223.1 or (Canada)

CSA B149.1 Natural Gas and Propane Installation Code.

vent must extend at least 5' (1.6m) above the highest

The

connected

equipment flue

colla

ROOF PITCHED

FROM 0” TO 45”

12” MAX

JOINT BETWEEN SINGLE WALL VENT

SEAL

AND

“B”VENT AND THE ANNULAR SPACE OF THE “B” VENT

CLEARANCE

SPECIFIED

TO BE AS

ON TYPE “B”

VENT PIPE

FIGURE 2

3. Do not terminate vent directly below roof eaves or above a walkway, or any other area where condensate dripping may

troublesome and may cause some staining. Avoid windows

steam may cause fogging or ice buildup.

where

4. When horizontally vented, minimum clearance for termination from any door, window, gravity air inlet, gas or electric meter, regulators, and relief equipment is 4 ft. (1.2m) for U.S.

ations. Refer to NFPA 54/ANSI Z223.1 in the U.S.A. and

install CSA B149.1 Natural Gas and Propane Installation Code

Canada or with authorities having local jurisdiction. In

in Canada,

vent termination must have a minimum 6 ft.

(1.8mm) horizontal clearance from gas and electric meters

relief devices as specified in the CSA B149.1, Natural

and Gas and Propane Installation

Code.

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

Page 7

5. Vent termination must be a minimum of 4' (1.2m) below or 4’ (1.2m) horizontally from any soffit vent or under-eave vent.

6. Vent must be a minimum of 6' from an inside corner formed by two exterior walls. If possible, leave a 10' clearance.

7. Vent termination must be a minimum of 10' (3m) from any forced air inlet (includes fresh air inlet for other appliances,

as a dryer).

such

8. When termination is routed through an exterior combustible wall

the vent must be supported using a listed clearance thimble. ty thimble. clea connection the

2. inches

Where local authorities permit, a single section of

pe B-1 vent pipe may be used as an alternative to the

When using a type B-1 vent termination use the

rances specified by the vent manufacturer. Seal the

between the single wall and double wall pipes and

annular space of the double wall pipe as shown in figure

Inside edge of vent termination tee must be at least 12

from outside wall as shown in figure 3 .

9. For horizontal venting, the vent pipe shall be supported with hangers aft

no more than 3ft. (1m) apart to prevent movement

er installation.

D – HORIZONTAL VENTING – COMMERCIAL

1. Horizontal commercial installations are for buildings which are

2. The vent pipe diameter for horizontal commercial

attached to living spaces. The vent may be single wall

not vent

material installed according to the sections

Venting A - General Recommendations and

d C - Horizontal Venting General

- Horizontal Venting - Commercial. Refer to figure 3.

ations shall be 4" (101mm) on the 45 and 75units. In all

install

cases a fl

the outlet

ue transition piece (supplied) is required to fit over

of the induced draft assembly on the appliance.

Requirements

3. Refer to table 2 for maximum vent connector lengths.

4. Select a wall termination point that will maintain ¼” rise per slope of horizontal run of vent pipe. The vent may be

foot

wall material minimum 26 GSG (0.46mm) galvanized

single steel or equivalent grade stainless steel. Seal single wall vent material

according to the section A - General

Recommendations and Requirements.

5. For upward sloped vent a condensate tee and drain must be

installed protect used, If will ma

within the first 5’ (1.5m) from the unit heater to

the appliance. If a flexible condensate drain line is

the drain line must include a loop entering the structure.

the unit is shut down for an extended period of time and

be exposed to sub-freezing temperatures, the condensate y freeze.

E – HORIZONTAL VENTING – RESIDENTIAL

1. For horizontal residential installations these units are certified

Category I appliances. The vent may be single wall

as material minimum 25 GSG (0.46mm) galvanized steel or

valent grade stainless steel. Venting A - General

equi

Recommendations and Requirements an Venting General and E - Horizontal Venting - Residential.

Refer to figure 6 .

2. The vent pipe diameter for horizontal residential installations

shall

be 4" (101mm) on both 45 and 75 units. A standard vent transition is required at unit in addition to the transition supplied

with the unit.

3. The maximum vent length is 5’ (1.5m) plus one 90-degree ow.

elb

4. The vent must maintain a ¼” rise per foot of slope upwards

toward

the termination.

d C - Horizontal

CONDENSATE DRAIN THROUGH TEE PIPE AND DRAIN LOOP

UPWARD SLOPE ON HORIZONTAL VENT-COMMERCIAL INSTALLATION

MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIV. STAINLESS STEEL SEALED ACCORDING TO

THESE INSTALLATION INSTRUCITONS. SLOPE: + 1/4 INCH FOR 1 FOOT RUN MINUMUM.

DRAFT BLOWER

INDUCED

NOTE - MINIMUM HORIZONTAL LENGHT 3 FT. (914MM), NOT INCLUDING CAP FOR TERMINATION. REFER TO TABLE 2 FOR MAXIMUM LENGTH AND NUMBER OF ELB

OWS.

COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER

FLUE TRANSITION

ROVIDED)

LISTED THIMBLE

ROUGH COMBUSTIBLE

LOOP WITH WATER

DRAIN

TRAP

(TO CONDENSATE DRAIN)

FIGURE 3

Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater

WALL

12” (30.5 CM)

MINIMUM

HIGHEST

12 INCHES MIN.

(30.5 CM)

ABOVE ALL

SNOWFALL

TERMINATION

VENT

CAP

Page 8

INDUCED

HORIZONTAL VENTING - RESIDENTIAL INSTALLATION

DRAFT BLOWER

FLUE TRANSITION

MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIV. STAINLESS STEEL SEALED INSTRU SLOPED: + 1/4 INCH FOR 1 FOOT RUN MINIMUM.

NOTE - MINIMUM HORIZONTAL LENGTH 3FT. (914MM), NOT INC

MAXIMUM DE

ACCORDING TO THESE INSTALLATION

CTIONS OR A SINGLE SEC TION OF TYPE B-1 VENT.

LUDING CAP FOR TERMINATION.

HORIZONTAL LENGHT 5FT. (1.5M) PLUS ONE 90-

GREE ELBOW.

COMMON

VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.

ROVIDED)

LISTED

COMBUSTION

UPWARD SLOPE

THIMBLE THROUGH

WALL

FIGURE 6

12 INCHES

MIN.

(30.5CM)

VENT

TERMINATION CAP

F – VENTING USING A MASONRY CHIMNEY

The following additional requirements apply when a lined masonry chimn

ey is being used to vent the compact unit heater.

1. Masonry chimneys used to vent Category I units heaters be either tile-lined or lined with a listed metal lining

must system

or dedicated gas vent. Unlined masonry chimneys are

prohibited.

a chimney that is servicing a solid fuel appliance. If a

to fireplace fireplace

A category I appliance must never be connected

chimney flue is used to vent this appliance, the opening must be permanently sealed.

2. A fan assisted unit heater may be commonly vented into an

lined masonry chimney provided:

existing

• The chimney is currently serving at least one draft-hood

equi

pped appliance.

• The vent connector and chimney are sized in accordance

with

venting tables in the (American) National Fuel Gas

ANSI Z223.1 or (Canada) CSA B149.1 Natural Gas

Code

Propane Installation Code.

and

IMPO

RTANT Single appliance venting of a fan assisted unit heater

a tile lined masonry chimney (interior or outside wall) is

into prohibited. vent accordance Gas Propane

3. A type B-1 vent or masonry chimney liner shall terminate

4. Do not install a manual damper, barometric draft regulator,

5. If type B-1 double-wall vent is used inside a chimney, no

6. Insulation for the flexible vent pipe must be an encapsulated

The chimney must first be lined with either type B-1

or an insulated single wall flexible vent lining system, sized in

with venting tables in the (American) National Fuel

Code ANSI Z223.1 or (Canada) CSA B149.1 Natural Gas and

Installation Code.

the roof surface with a listed cap or a listed roof

above assembly listings

in accordance with the terms of their respective

and the vent manufacturer’s instructions.

flue restrictor between the unit heater and the chimney.

other appliance can be vented into the chimney. Outer wall

type B-1 vent pipe must not be exposed to flue products.

fiberglass manu

sleeve recommended by the flexible vent pipe

facturer.

7. The space between liner and chimney wall should NOT be ated with puffed mica or any other loose granular

insul insulating

material.

8. If type B-1 vent or an insulated flexible vent pipe cannot be as liners, the chimney must be rebuilt to accommodate

used

of these methods or some alternate approved method

one must

be found to vent the appliance. When inspection reveals

an existing chimney is not safe for the intended purpose,

that

shall be rebuilt to conform to nationally recognized

it standards, with The ensure

lined or relined with suitable materials or replaced

a gas vent or chimney suitable for venting unit heaters.

chimney passageway must be checked periodically to

that it is clear and free of obstructions.

G – REMOVAL OF UNIT FROM COMMON VENT

In the event that an existing unit heater is removed from a venting

commonly run with separate gas appliances, the venting

system

is likely to be too large to properly vent there maining

system attached each operation, If must

1. Seal any unused openings in the common venting system.

2. Visually inspect the venting system for proper size and

3. In so far as is practical, close all building doors and windows

4. Follow the lighting instructions. Place the appliance being

appliances. The following test should be conducted while

appliance is in operation and the other appliances are not in

yet remain connected to the common venting system.

the venting system has been installed improperly, the system

be corrected.

horizontal leakage, unsafe

and remaining loc dryers

pitch. Determine there is no blockage or restriction,

corrosion, or other deficiencies which could cause an

condition.

all doors between the space in which the appliances

connected to the common venting system are

ated and other spaces of the building. Turn on clothes

and any appliances not connected to the common venting system. Turn on any exhaust fans, such as rangehoods at maximum Close

inspected

rate continuously.

ope

and bathroom exhausts, so they will operate

speed. Do not operate a summer exhaust fan.

fireplace dampers.

in operation. Adjust thermostat so appliance will

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

Page 9

EQUIPMENT GROUND

LINE VOLTAGE FIELD WIRING

UNIT

BLACK

WHITE

5. Test for spillage at the draft hood relief opening after five

minutes of main burner operation. Use the flame of a matchor candle, or smoke from a cigarette, cigar, or pipe.

6. After it has been determined that each appliance remaining

connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous condition of use.

7. If improper venting is observed during any of the above tests,

the common venting system must be corrected. The common venting system should be resized to approach the minimum size as determined by using the appropriate tables in Appendix G in the current standards of the National FuelGas Code, ANSI Z223-1 in the U.S.A. and the appropriate Category I Natural Gas and Propane appliances venting sizing tables in the current standards of the CSA B149.1 Natural Gas and Propane Installation Code in Canada.

NOTE Local codes may supersede any of the above provisions.

BLACK WIRE WITH WHITE TAPE OR

WHITE WIRE WITHOUT TAPE

FIGURE 7

GAS SUPPLY CONNECTION

GROUNDED

JOINT UNION

1/8 NPT

PLUGGED TAP

DRIP LEG

FIGURE 8

GAS SUPPLY TO UNIT HEATER

MANUAL MAIN SHUT-OFF

VALVE WILL NOT HOLD

NORMAL TEST PRESSURE

MANUAL

MAIN SHUT-OFF VALVE

(FURNISHED BY INSTALLER)

GAS FLOW

ISOLATE

GAS VALV E

ELECTRICAL CONNECTIONS

NOTE The MHU/HSU series unit heaters use a direct spark

ignition system. There is no pilot necessary as the spark lights the main burner as the gas valve is turned on. The direct spark ignition

WARNING

Electric shock hazard. Can cause injury or death. Do not use this heater if any part has been under water. Immediately call a qualified service technician to inspect the furnace and to replace any part of the control system and any gas control which has been under water.

WARNING

Danger of explosion. Can cause injury or product or property damage. If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting of f electrical supply.

WARNING

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies.

CAP

UNIT HEATER

FIGURE 9

WARNING

Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly.

Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater

Page 10

control board emits radio noise as the sparking process is

rway. The level of energy may be sufficient to disturb a logic

unde

in a microprocessor controlled thermostat. It is

circuit recommended that an isolation relay be used when connecting

unit heaters to a microprocessor controlled thermostat. Install

the the

thermostat according to instructions provided. Select circuit protection separate breaker)

rvicing. Connect wiring through knockout on the junction box

se loc diag for

Electrically absence Elect with

NOT

tape

Ma field typical be desired

and wire size according to the unit rating plate. Install a

disconnect switch (protected by either fuse or circuit

near the unit so that power can be turned off for

ated on the side of the unit heater. Refer to heater wiring

ram for connection information. Use 18 gauge wire or larger

thermostat connections.

ground unit in accordance with local codes or, in the

of local codes, in accordance with the current National

rical Code (ANSI/NFPA No. 70) in the U.S.A., and in Canada

the current Canadian Electrical Code, Part 1 CSA C22.1.

E Uninsulated ground wires must be wrapped in electrical to avoid damage to the electrical system.

ke line voltage connections as shown in figure 7 . Connect

wiring as shown on wiring diagram on unit. Also refer to

diagram in this manual. An additional thermostat wire must

run to terminal “G” on heater when continuous blower is

GAS CONNECTION

When connecting gas supply, the length of the run from the meter must

be considered in determining the pipe size to avoid excessive

pressure drop. A line pressure of 7" w.c. (178mm w.c.) for natural

should be maintained when sizing piping. A line pressure of 13"

gas w.c. (330mm w.c.) should be maintained for liquefied petroleum

gas. For correct sizing of piping, refer to the (American)

(LP) National Fuel Gas Code ANSI Z223.1 or (Canada) CSA B149.1,

Gas and Propane Installation Code or consult the utility

Natural

jurisdiction.

having

A drip leg should be installed in the vertical pipe run to the unit. In

localities, codes may require that a manual main shutoff

some

and union (furnished by installer) be installed external to the

valve

Union must be of the ground joint type. A drip leg should be

unit.

accessible to permit cleaning and emptying. See figure 8 .

readily

NOTE If a switch box is mounted over electrical knockouts on back

unit, leave a minimum of 4" (102mm) clearance between switch

and drip leg.

box

A 1/8" NPT plugged tap shall be installed immediately upstream of the gas supply connection to the heater.

NOT

E Compounds used on threaded joints of gas piping must be

resistant

to the actions of liquefied petroleum gases.

LEAK CHECK

After gas piping is completed, carefully check all piping connections, solution

CAUTION DO NOT use matches, candles, flame or other sources

IMPO

(field and factory), for gas leaks. Use a soap

or other preferred means.

of ignition to check for gas leaks.

RTANT The heater and its individual shut off valve must be

disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2

(3.45kPa).

psig

appliance must be isolated from the gas supply piping system

The

closing its individual manual gas shutoff valve during any

by pressure testing of the gas supply system at test pressures equal to or less than 1/2 psig (3.45kPa). See figure 9 .

NOT

E In case emergency shutdown is required, shut down main

gas

valve and disconnect main power to unit. These devices should

properly labeled by the installer.

START – UP AND OPERATION

UNIT START–UP

FOR YOUR SAFETY READ BEFORE LIGHTING

LIGHTING smell all around the appliance area for gas. Be

BEFORE

to smell next to the floor because some gas is heavier than

sure

and will settle on the floor.

air

only your hand to push in or turn the gas control knob. Never

Use

tools. If the knob will not push in or turn by hand, do not try to

use

it, call a qualified service technician. Force or attempted

repair repair

may result in a fire or explosion.

MHU

45/75 and HSU 45/75 unit heaters are equipped with an

tomatic spark ignition system. There is no pilot. In case of a

fety shutdown, move thermostat switch to OFF, then return the

sa thermost

Should off electrical

GAS VALVE OPERATION FOR ROBERTSHAW 2000 DER SERIES VALVE (FIGURE 10)

1. STOP! Read the safety information at the beginning of this

2. Set the thermostat to lowest setting.

3. Turn off all electrical power to appliance.

4. This appliance is equipped with an ignition device which

5. Depress knob on gas valve; knob will snap to OFF.

6. Wait five minutes to clear out any gas. If you then smell gas,

7. Turn knob on gas valve 90

8. Turn on electrical power to unit.

9. Set the thermostat to desired setting.

10. The combustion air blower will start. The burners will light

11. If unit does not light first time (gas line not fully purged) it will

12. If lockout occurs, repeat steps 1 through 9.

at switch to HEAT position.

overheating occur, or the gas supply fail to shut off, shut

the manual gas valve to the appliance before shutting off the

supply.

section

automatically lights burner. DO NOT attempt to light the burners

(See

STOP

phon smell

within

attempt

manually.

Figure 10)

! Immediately call your gas supplier from a neighbor’s e. Follow the gas supplier’s instructions. If you do not gas go to next step.

counterclockwise to ON.

40 seconds.

up to two more ignitions before locking out.

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

Page 11

ROBERTSHAW 2000DER GAS VALVE

PRESSURE TAP

INLET

GAS VALVE KNOB SHOWN

OFF POSITION

MANIFOLD

PRESSURE ADJUSTMENT

SCREW

UNDER CAP

MANIFOLD

PRESSURE

TAP

FIGURE 10

13. If appliance still will not operate, follow the instructions “TO OFF GAS TO UNIT” and call your service technician or

TURN gas

supplier.

TO TURN OFF GAS TO UNIT

1. Set thermostat to lowest level.

2. Turn off all electrical power to unit if service is to be

performed

7. The ignition control will energize the fan approximately 45 seconds

after ignition is established.

8. After the thermostat demand is satisfied the gas valve is

5 seconds after the demand is satisfied the

closed; combustion

air blower is shut off.

9. The control center shall shut off the system fan approximately 150 seconds after the gas valve is denergized.

IGNITION CONTROL LED

The ignition control board contains a green LED which indicates the following

TABLE 3

IGNITION CONTROL LED

LED UNIT OPERATION

Slow Flash* Normal Operation - No call for heat

Fast Flash Normal Operation - Call for heat

Cur

rent signal at FLAME terminal 0.6 to 1.0 microamps

2 Flashes System lockout - failed to detect or sustain flame

Current

signal at FLAME terminal <0.6 microamps

3 Flashes Pressure switch failed closed before CAB is energized

failed open after CAB is energized

4 Flashes High limit or rollout switch open

5 Flashes Flame sensed and gas valve not energized

Steady

Off Loss of power

3. Depress knob on gas valve; knob will snap to OFF.

HEATING SEQUENCE OF OPERATION

1. When the thermostat calls for heat, the combustion air ower starts immediately.

2. Combustion air pressure switch proves blower operation

fore allowing power to the ignition controller. This switch is

be factory set and no adjustment is necessary.

3. After prepurge of approximately 30 seconds, the spark

is energized and the solenoid valves open in the gas

ignition

valve

4. The spark then ignites the gas, the ignition sensor proves the

and the combustion process continues.

flame

5. In the event that the flame is not detected after the first 10-

trial for ignition, the controller will repeat steps 3 and

second 4 an additional two times before locking out the gas valve.

control will then automatically repeat steps 3, 4, and 5

Ignition

60 minutes.

after

To interrupt the 60-minute lockout period, move thermostat from “Heat” to “OFF” then back to “HEAT.” Heating

uence then restarts at step 1.

seq

6. The burners shall light without noticeable crossover delay.

shall be no flame lifting from the burner heads,

There

ack or burning within the burner. The flames shall be

flashb predominantly centered

place

blue in color and shall be approximately

in the tubes with no apparent impingement taking

Steady On Ignition control failure

*When thermostat is placed in continuous fan mode LED will slowly flash.

GAS CONVERSION KIT OPTIONAL

Can be purchased at any Enerco / Mr. Heater dealer or direct from the factory under the following numbers 45NG--TO-- LP-----60067 75NG--TO-- LP-----60069 45LP---TO--NG-----60066 75LP---TO--NG-----60071

ADJUSTMENTS

HIGH ALTITUDE

Units may be fired at full input up to 2000 ft. (610m) above sea level. Above 2000 ft. (610m), manifold pressure must be adjusted

some units. Adjust pressure regulator to pressure shown in

4 for natural gas and table 5 for LP/propane gas.

table

GAS FLOW

To check for proper gas flow to the combustion chamber, determine input required number of cubic feet per hour. Determine the flow of gas through the

GAS PRESSURE

1. Check gas line pressure with unit firing at maximum rate. A

the Btu input from the appliance rating plate. Divide this

rating by the Btu per cubic feet of available gas. Result is the

the gas meter for two minutes and multiply by 30 to get

hourly flow of gas.

Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater

Page 12

minimum of 5.0" w.c. for natural gas or 10.4" w.c. for LP/ propane

2. After line pressure has been checked and adjusted, check manifold unit screw kit provided

gas should be maintained for proper unit operation.

pressure. Correct manifold pressure is shown on the

rating plate. See figure 10 for gas pressure adjustment

location. A natural gas to LP/propane gas changeover

is required to convert unit. Refer to installation instructions

with changeover kit for conversion procedure.

LIMIT CONTROL

The limit control switch is factory set and not field adjustable.

TABLE 4

NATURAL GAS MANIFOLD PRESSURES - IN.WC. (KPA)

ALTITUDE FT. (M)

45/75 HSU45/75 0-2000 2 000-4500

MHU

610) (610-1370)

(0-

SERVICE

CAUTION Turn off gas and electrical power to unit before

performing Remember to follow lighting instructions when putting unit back into

any of the original wire as supplied with the appliance must be replaced, it must be replaced with wiring material having a tempe

not use this appliance if any part has been under water. Immedi appliance water.

BURNERS

1. Periodically examine burner flames for proper appearance

2. Before each heating season examine the burners for any

3. Clean burners as follows:

any maintenance or service operations on this unit.

operation after service or maintenance.

rature rating of at least 105°C.

ately call a qualified service technician to inspect the

and replace any gas control which has been under

during the heating season.

deposits

or blockage that may have occurred.

45/75 4.0 (0.99)* 3.6 (0.89)

*No adjustment required.

TABLE 5

LP/P

ROPANE GAS MANIFOLD PRESSURES - IN.WC. (KPA)

ALTITUDE FT. (M)

45/75 HSU45/75 0-2000 2 000-4500

MHU

(0-

610) (610-1370)

45/75 10 (2.49)* 8.0 (1.99)

*No adjustment required.

LOUVER VANE ADJUSTMENTS

Rotate louver vanes to direct airflow upward, downward, straight,

any combination of these directions. When unit is installed in an

or inverted position, louvers may be positioned in the same manner.

COMBUSTION AIR PRESSURE SWITCH

This pressure switch checks for proper combustion air blower

ration before allowing an ignition trial. The switch is factory

ope set and no field adjustment is necessary.

FLAME ROLLOUT SWITCH

The flame rollout switch(es) are located on the burner box top,

d the ignition control board. This normally closed switch

behin

on a temperature rise. Check for adequate combustion air

opens

manually resetting switch.

before

• Turn off both electrical and gas supplies to unit.

• Disconnect gas supply piping, high tension and sensor

Remove gas manifold. Remove burner tray.

leads.

• Clean burners as necessary. Make sure that burner

line up properly to ensure flame crossover.

heads

ck spark gap on electrode and adjust if required. The

Che gap

should be between 0.110 inch and 0.140 inch

79mm to 3.56mm). The gap may be checked with

(2. app

ropriately sized twist drills or feeler gauges.

• Reinstall burner tray, gas manifold, high tension and

sensor

leads. Reconnect gas supply piping.

• Restore electrical power and gas supply. Follow lighting

instructions

to light unit. Check burner flame.

FLUE PASSAGEWAY AND FLUE BOX

The flue passages and flue box should be inspected and cleaned

to each heating season. The sequence of operation should be

prior

follows:

1. Turn off both electrical and gas supply to unit.

2. Disconnect combustion air blower wiring.

3. Remove screws securing flue box to unit. Remove flue box. If

necessa fl

4. Remove turbulator retention bracket and turbulators. Clean

turbul

5. Remove burners as described in section “BURNERS” section.

6. Clean tubes with a wire brush.

7. Reassemble unit. The combustion air and flue box gaskets

shoul

8. Restore electrical power and gas supply. Follow lighting

instructions

ry, remove blower assembly from flue box. Clean

ue box with wire brush.

ators with wire brush.

d also be replaced during reassembly.

to light unit. Check operation of unit.

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

Page 13

WIRING SCHEMATIC FOR UNITS WITH

6-PIN CONNECTOR SCN-KWC CONTROL BOARD

NOTE:IFANYOFTHEORIGINALWIREASSUPPLIEDWITHTHE APPLIANCE MUSTBEREPLACED,ITMUSTBEREPLACEDWITH WIRINGMATERIALHAVING ATEMPERATURERATING OFATLEAST 105°C.

WIRE DIAGRAM

GAS FIRED UNIT HEATER DSI- IGNITION

MHU45L P MHU45NG

HSU4 5L

P HSU45NG

MHU75L

P MHU 75NG

HSU7 5L

P HSU75NG

600 0

6 REV.

LADDER DIAGRAM

Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater

Page 14

COMBUSTION AIR BLOWER

FAILURE TO OPERATE

Under normal operating conditions, the combustion air blower

be checked and cleaned prior to the heating season with

should the power supply disconnected. Use a small brush to clean blower wheel

ELECTRICAL

1. Check all wiring for loose connections.

2. Check for correct voltage at unit (unit operating).

3. Check amperage draw.

FLUE AND CHIMNEY

Check all vent and vent connector joints for tightness. Ensure that connections

are sealed and that there are no blockages.

If unit fails to operate check the following:

1. Is thermostat calling for heat?

2. Is main disconnect closed?

3. Is there a breaker tripped or a fuse blown?

4. Is gas turned on at meter?

5. Is manual shutoff valve open?

6. Is unit ignition system in lock out? If unit locks out again,

service technician to inspect unit.

call

7. Is pressure switch closed? Obstructed flue will cause unit to

shut off at pressure switch. Check flue passage and outlet.

REPAIR PARTS

When ordering repair parts include the complete unit model number listed on the unit rating plate. For example: MHU45/75 and

HSU45/75.

PARTS LIST:

SEE BACK PAGE FOR PARTS ORDERING INFORMATION

REF #. DESCRIPTION 45 ITEM # QUANTITY 75 ITEM # QUANTIT Y

1 ............... CIRCUIT BOARD................................................ .... .... .... .... ... 60105 .................................... 1 ........................................... S/A................................... 1

2 ............... LIMIT SENSOR.................................................... .....................60015 .................................... 1 ...........................................S/A ................................... 1

3 ............... ELECTRODE IGNITER........................................

4 ............... ELECTR ODE SENSOR .........................................................60040 ................................ 1 ........................................... S/A ................................... 1

5 ............... BURNER ................................................................................. .60050 ................................ 3 ........................................... S/A ................................... 5

6 ............... IGNITION LEAD .................................................................. 60045..................................... 1 ........................................... S/A ................................... 1

7 ............... SENSOR LEAD .......................................................................60046 ................................ 1 ........................................... S/A ................................... 1

8 ............... ORIFICE (NAT) .................................................................... 60049 ..................................... 3 ............................................ S/A ................................... 5

9 ............... ORIFICE (LP) .........................................................................60056 ................................ 3 ........................................... S/A ................................... 5

10 ............. GAS VALVE (NAT) ............................................................... 02812 ...................................... 1 ..................................................S/A ................................... 1

11 .............. GAS VA LVE (LP) .................................................................02811 ...................................... 1 ........................................... S/A ................................... 1

12 .............. TRANSFORMER .................................................................60025 ..................................... 1 .......................................... S/A ................................... 1

13 .............. PRESSURE SWITCH ............................................................60030 ..................................... 1 .......................................... S/A ................................... 1

14 ............. HI LIMIT SENSOR HEAT EXCH. ...................................60022 ..................................... 1 ...............................

15 .............. PRESSURE SWITCH TUBE .............................................60031 ..................................... 1 .......................................... S/A ................................... 1

16 ............. INDUCED DRAFT MOTOR ................................................. 60020 ..................................... 1 .......................................... S/A ................................... 1

17 ............. VENT ADAPTER .............................................................. 60130 .................................. 1 .........................................60140............................... 1

18 ............. INDUCED DRAFT MOTOR GA SKET ........................ 60135 ....................................... 1 .......................................... S/A.................................. 1

19 ............. BACK BRACKET .............................................................. 60075 ...................................... 1 .......................................... S/A................................... 1

20 ............. FR ONT BRACKET .............................................................. 60080 ................................. 1 ......................................... S/A................................... 1

21 ............. LOUVERS .......................................................................... 60100 ...................................... 5 .......................................... S/A. .............................. 7

22 ............. LOUVER SPRING .............................................................. 60103 ............................... 5 .......................................... S/A ................................... 7

23 ............. FLUE BOX ............................................................................... 60085 ................................. 1 ..........................................60087............................... 1

24 ............. FLUE BOX GA SKET ........................................................ 60090 ................................ 1 ................................... ......60092............................... 1

25 ............. HEAT EXCHANGER ......................................................... 60065 ................................. 1 ..........................................60068............................... 1

26 ............. ACCESS DOOR ..................................................... 60070 ..................................... 1 ..................... ............... .. . 60072 ............................. 1

27 ............. FRONT .................................................................................... 60095 ................................. 1 ..........................................60097............................... 1

28 ............. SIDE DOOR .......................................................................... 60110 ..................................... 1 ................................... .. .. .60112 ................................. 1

29 ............. WRAPPER .......................................................................... 60115 ...................................... 1 ................................... .. . .. 60117 ............................. 1

30 ............. FAN MOTOR ......................................................................... 60055 ..................................... 1 ..........................................60054............................... 1

31 ............. FAN GUARD ......................................................................... 60120 ...................................... 1 ................................... .. . . .60122 ............................. 1

32 ............. FAN ASSEMBLY ............................................................... 60125....................................... 1 .................................... .. .. 60127 ............................. 1

.......................60035 .................................. 1 .......................

................... S/A ................................... 1

............. S/A ................................... 1

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

Page 15

Mr. Heater / HeatStar • Compact Unit Heater • Model # MHU45/75 HSU45/75

Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater

Page 16

OPERATING INSTRUCTIONS AND OWNER’S MANUAL

MR. HEATER

M O

D E

MHU 45

MHU

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.

M O

D E

ATSTAR

HSU HSU

45 75

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 Enerco / Mr. Heater local dealer

or direct from the factory

FOR INFORMATION REGARDING SERVICE

Please call Toll-Free 800-251-0001 • www.mrheater.com Our office hours are 8:30 AM – 5:00 PM, EST, Monday through Friday. Please include the model number, date of purchase, and description of problem in all communication.

LIMITED WARRANTY

The

company warrants this product to be free from imperfections in material or workmanship,

normal and proper use in accordance with instructions of The Company, for a period of

under th

ree years on parts (limited) and 10 years on the heat exchanger, from the date of delivery to

buyer. The Company, at its option, will repair or replace products returned by the buyer to the

the factory, transportation prepaid within said period and found by the Company to have imperfections

a part is damaged or missing, call our Technical Support Department at 800-251-0001.

Address any Warranty Claims to the Service Department, Enerco Group, Inc., 4560 W. 160TH ST., CLEVELAND, OHIO 44135. Include your name, address and telephone number and include details concerning the claim. Also, supply us with the purchase date and the name and

ress of the dealer from whom you purchased our product.

add

The

foregoing is the full extent of the responsibility of the Company. There are no other warranties, express or implied. Specifically there is no warranty of fitness for a particular purpose for delay caused by imperfections, for consequential damages, or for any charges of the expense of any nature incurred without its written consent. The cost of repair or replacement

be the exclusive remedy for any breach of warranty. There is no warranty against

shall infringeme trade. This warranty will not apply to any product which has been repaired or altered outside

the factory in any respect which in our judgment affects its condition or operation.

Some

states do not allow the exclusion or limitation of incidental or consequential damages,

the above limitation or exclusion may not apply to you. This Warranty gives you specific

so legal rights, and you may have other rights which vary from state to state.

in material or workmanship.

and there is no warranty of merchantability. In no event shall the Company be liable

nt of the like and no implied warranty arising from course of dealing or usage of

ANS Z83.8-(2002) • CSA 2.6-(2 002)

UNIT

HEATER

CSA .10. 96 U.S. (2ND ED.)

UNIT

HEATER FOR RESIDEN TIAL INSTALLAT ION

CATEGORY /CATEORIE

Enerco Group, Inc. reserves the right to make changes at any time, without notice or

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

Enerco | Compact Unit Heater Operating Instructions and Owner’s Manual

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User Manual