A.O. Smith FMHR-30, FMHR-40 User Manual
ENERGY SAVER
MANUFACTURED HOUSING
Residential Gas
Water Heaters
GAS CONTROL CONVERTIBLE FOR
NATURAL AND PROPANE GAS
• For flexibility to meet the varying needs
of manufactured housing installations.
SIDE-MOUNTED 3/4˝ COLD WATER
INLET
• For ease of installation when cold water
supply originates below the structure.
• Top mounted 3/4˝ hot water outlet.
GREEN CHOICE® GAS BURNER
• Patented eco-friendly burner design
reduces NOx emissions by up to 33%
and complies with Low-NOx emission
requirements of less than 40 ng/J.
COREGARD™ ANODE ROD
• Our anode rods have a stainless steel
core that extends the life of the anode
rod allowing superior tank protection far
longer than standard anode rods.
BLUE DIAMOND® GLASS COATING
• Provides superior corrosion resistance
compared to industry standard glass
lining.
ENHANCED-FLOW BRASS DRAIN
VALVE
• Our residential water heaters have a
solid brass, tamper resistant, enhancedflow,ball type, drain valve.
• Uses a standard female hose fitting that
allows for fast and easy draining during
maintenance.
• Designed for easy operation, this valve
includes an integral screwdriver slot that
features a 1/4 turn (open/close) radius,
which not only permits full straightthrough water flow but also a quick and
positive shut off.
CODE COMPLIANCE
• Meets UBC, CEC and HUD National
Codes/
• Meets the thermal efficiency and
standby loss requirements of the U.S.
Department of Energy and current
edition of ASHRAE/IESNA 90.1.
• Complies with the Federal Energy
Conservation Standards effective April
16, 2015, in accordance with the Energy
Policy and Conservation Act (EPCA), as
amended.
CSA CERTIFIED AND ASME RATED
T&P RELIEF VALVE
COMPLIES WITH HUD STANDARDS
FOR MANUFACTURED HOUSING
INSTALLATION
MAXIMUM HYDROSTATIC
WORKING PRESSURE 150 PSI
DESIGN-CERTIFIED BY CSA
INTERNATIONAL
• Certified at 300 PSI test pressure and
150 PSI working pressure.
• Listed according to ANSI Z21.10.1-CSA
4.1 standards governing storage tanktype gas water heaters.
6-YEAR LIMITED TANK AND
2-YEAR LIMITED PARTS
WARRANTY
• For complete information, consult
written warranty or go to hotwater.com.
©2015 A. O. Smith Corporation. All rights reserved.
www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015
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AOSRG47100
Residential Gas
Water Heaters
DIMENSIONS IN INCHES
Draft
Hood
Outlet
Model
Number
FMHR-30 30 55 0.63 35,500 32,000 36 2 61-1/2 58 18 13 14-1/4 52 3 or 4 129
FMHR-40 40 62 0.62 35,500 32,000 36 2 61-3/4 58-1/4 20 13 14-1/4 51-3/4 3 or 4 153
All models ship from the factory for use with natural gas. A complete propane (LP) burner is supplied for converting to propane gas.
All models are certified from sea level to 10,100 ft. elevation. No option availavle for top T&P.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
Gallon
Capacity
First Hour
Rating
Gallon
Energy
Factor
ANODE ROD
BTU Input
Per Hour
Natural
Gas
BTU Input
Per Hour
Propane
Gas
Recovery @
90°F Rise
Gallon Per
Hour
Insulation A B C D E F
Approx.
Shipping
ROOF JACK INSTALLATION
HOT WATER OUTLET
CONNECTION 3/4˝
NIPPLE SUPPLIED
A
B
T&P VALVE
F
C
COLD WATER INLET
CONNECTION,
3/4˝ NIPPLE SUPPLIED
E
D
This water heater must have a properly-installed draft hood and be
connected to a listed roof jack that terminates to the outdoors. The
roof jack vent pipe must be secured to the draft hood with sheet
metal screws. (Roof jack not furnished.)
The following roof jack models are certified for use with this water
heater and are available from your water heater supplier:
Field Controls No. 987 for roof pitch of 5-12 or less:
Kit Number Maximum Length Between Roof and Ceiling
9002964005 12”
9002965005 32”
9002966005 60”
9002967005 95”
White Metal Products 3RJ for roof pitch of 3-12 or less:
Kit Number Maximum Length Between Roof and Ceiling
9007941005 14”
9007942005 30”
Weight
(lbs)
GAS CONNECTOR
1/2˝ FEMALE
For technical information call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
www.hotwater.com | 800-527-1953 Toll-Free USA
Install the roof jack according to its manufacturer’s instructions.
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AOSRG47100
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