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MFH-I&S-02

INSTALLATION & SERVICE MANUAL

MANUFACTURED HOME (MOBILE HOME)

GAS WATER HEATER

For your family’s comfort, safety and convenience, we recommend
this water heater be installed and serviced by a plumbing
professional.

TABLE OF CONTENTS

GENERAL INFORMATION .......................................................... 1

INSTALLATION ..................................................................... 2

Locating The Water Heater ............................................... 2
Minimum Clearances ......................................................... 2
Venting ........................................................................... 3
Combustion Air Supply ..................................................... 3
Water Connections .......................................................... 4
Gas Connections .............................................................. 5
Gas Conversion Instructions ............................................. 5

GENERAL OPERATION .............................................................. 6

Lighting and Shutdown Instructions .................................. 6
Thermostat Adjustment .................................................... 7
Burner Flame Check .......................................................... 7

MAINTENANCE ........................................................................ 7
TYPICAL INSTALLATION INSTRUCTIONS ..................................... 8

GENERAL INFORMATION

This gas-fired water heater is design certified by underwriter’s laboratories in
accordance with the HUD Manufacturer Home Construction and Safety Standard,
Title 24, part 3280.

The warranty for this water heater is in effect only when the water heater is
installed, adjusted, and operated in accordance with these Installation and
Operating Instructions. The manufacturer will not be liable for any damage
resulting from alteration and/or failure to comply with these instructions.

This water heater must be installed in accordance with local codes. In the
absence of local codes, it must be installed in compliance with The Federal
Manufactured Home Construction and Safety Stand Title 24 CRF, part 3280 or
CAN/CSA Z240 MH series, mobile home. In the absence of such standard, The
Standard for mobile Homes (ANSI/NFPA No. 601B-1977).

This water heater is of the closed combustion type (direct venting) where all the
combustion air is supplied from the outdoors through the air intake and all
combusted gas products are vented directly to the outside by means of the
roof jack. No draft diverter (vent hood) is required for this water heater.

Underwriters Laboratories, Inc. has tested a representative sample of this
water heater design for its safety of operation.  The ULA listing of this water
heater includes the field installation of the following components: roof jack, leg
enclosure (optional), air intake tube (optional), and heater tie down materials.
These components for field installation may have been shipped with this heater
and must be installed according to the instructions (see page 8). No other
components are approved for use with this water heater.

This water heater has been designed and certified for the purpose of heating
potable water.  The installation and use of this water heater for any purpose
other than the heating of potable water may cause damage to the water
heater, create a hazardous condition, and nullify the warranty.

Do not use this appliance if any part has been submerged in water. You should
contact the plumbing professional who installed the water heater to inspect the
appliance and to replace any part of the control system including the combination
gas control which has been submerged in water.

This water heater has been manufactured for operation at altitudes from sea
level to 2000 feet (610m) (unless otherwise specified on the water heater
rating plate).  For use of this appliance at an elevation greater than 2000 feet
(610m), contact the dealer or manufacturer listed on the rating plate for
information on any necessary modification. Uncorrected operation of this
appliance may create a hazard to life and property.

 WARNING

If the information in these instructions is not followed exactly,
a fire or explosion may result causing property damage, personal
injury or death.

FOR YOUR SAFETY

Do not store or use gasoline or other flammable, combustible, or
corrosive vapors and liquids in the vicinity of this or any other
appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any

telephone in your building.

• Immediately call your gas supplier from a neighbor’s

telephone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire

department.

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

 CAUTION

Incorrect operation of this appliance may create a hazard to
life and property and will nullify the warranty.

 DANGER

Do not store or use gasoline or other flammable, combustible, or
corrosive vapors and liquids in the vicinity of this or any other
appliance.

IMPORTANT

Before proceeding, please inspect the water heater and components for
possible damage.

 DO NOT

 install any damaged components. If damage is evident

then please contact the supplier where the water heater was
purchased or the manufacturer listed on the rating plate for replacement parts.

Summary of Contents for MFH-I&S-02

Page 1: ... instructions see page 8 No other components are approved for use with this water heater This water heater has been designed and certified for the purpose of heating potable water The installation and use of this water heater for any purpose other than the heating of potable water may cause damage to the water heater create a hazardous condition and nullify the warranty Do not use this appliance i...

Page 2: ...water heater The drain pan as described above can be purchased from your plumbing professional The drain pan must be piped to an adequate drain The piping must be at least 3 4 inch 1 9 cm in diameter and pitched for proper drainage It is recommended that a minimum clearance of 4 inches 10 2 cm be provided on the side of the water heater for servicing and maintenance of the combination temperature ...

Page 3: ...w the underside sheathing and secure with the screws provided THE BOTTOM OF THE AIR INTAKE MUST BE AT LEAST 12 30 5cm ABOVE THE GROUND LEVEL 4 Seal the openings around the air intake and underside sheathing to resist the entrance of rodents 5 Position the water heater so it is centered above the air intake Note The water heater should also be centered with the openings in the roof and ceiling to a...

Page 4: ...al minutes at the kitchen sink before you use any electrical appliance which is connected to the hot water system If hydrogen is present there will be an unsual sound such as air escaping through the pipes as hot water begins to flow Do not smoke or have open flame near the faucet at the time it is open WARNING For protection against excessive temperatures and pressure install temperatureandpressu...

Page 5: ...mustbeisolatedfromthegassupply piping system by closing its manual shut off valve during any pressure testing of the gas supply system at test pressures equal to or less than psi 3 5kPa The supply line must be capped when not connected to the water heater 3 Change the pilot regulator by removing thermostat dial and pilot regulator cap Depress and rotate knob clockwise to the L P setting using a sc...

Page 6: ...red home mobile home TO FILL THE WATER HEATER 1 Close the water heater drain valve by turning the knob clockwise 2 Open the cold water supply shut off valve 3 Open several hot water faucets to allow air to escape from the system 4 When a steady stream of water flows from the faucets the water heater is filled Close the faucets and check for water leaks at the water heater drain valve combination t...

Page 7: ...verheating Should overheating occur or the gas supply fail to shut off turn off the manual gas control valve to the appliance and call qualified service technician Note Whenever the water heater is filled with cold water condensate will form on the cool tank surface and drops of water will fall on the hot burner and combustion chamber surfaces producing a sizzling noise Condensation is normal and ...

Page 8: ... FOR YOUR SAFETY DO NOT ATTEMPT REPAIR OF COMBINATION GAS CONTROL BURNERS OR GAS PIPING REFER REPAIRS TO A QUALIFIED SERVICE TECHNICIAN WARNING THIS WATER MAY BE HOT 9 A combination sacrificial anode rod hot water outlet nipple has been installed to extend tank life The anode rod should be inspected periodically every 2 years and replaced when necessary to prolong tank life Water conditions in you...

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