Installation Guide

Residen al Gas Water Heater Use and Care Guide for Manufactured Homes • 9
GETTING STARTED
GETTING STARTED
Enclosure Installa on
Requirements
WARNING! Do not store or use
fl ammable materials, vapors, or liquids
in the water heater enclosure. Do not
use the enclosure as a storage area.
Air for combus on and ven la on must
not be supplied from the occupied
spaces of the manufactured (mobile)
home. IMPORTANT: The opening that
provides outside air to your water
heater must have a minimum free
area of 20 square inches. Also, ensure
that your installa on complies with all
applicable code requirements.
The following methods may be used
to provide suffi cient combus on and
ven la on air to the water heater when
it is installed in the enclosure. See
Figure 3: Enclosure Confi gura ons.
Method I
Provide a single air opening in the
exterior door of the enclosure. The
opening must have a minimum free
area of 20 square inches. The bo om
of the opening must be within 6 inches
from the bo om edge of the door.
Cover the opening with 1/4 inch wire
mesh screen or louvers.
Method II
For enclosures with a solid exterior
door, provide an air opening in the fl oor.
The opening must have a minimum
diameter of 5 inches (20 square inches
minimum free area) and be covered
with 1/4-inch wire mesh screen.
IMPORTANT: The drain pan must not
cover any por on of the air intake
opening in the fl oor.
Also, if the manufactured home is
skirted, an air intake opening with a
minimum free area of 32 square inches
must be provided in the skirt. Other
gas fi red appliances in the home may
require addi onal free air openings.
Consult the manufacturers for correct
sizing.
IMPORTANT:
• The water heater must be secured
with brackets/straps as described
in Securing the Water Heater, page
15.
• A discharge line must be installed
as described in the typical
installa on graphic. See COMPLETED
INSTALLATION (TYPICAL), page 2.
• There must be adequate space
(clearances) for periodic servicing
(e.g., a minimum of 24 inches of
front clearance). The installa on
must allow a minimum clearance
from combus ble surfaces as stated
on the ra ng plate.
• It is recommended that the water
heater be installed in a metal drain
pan. The drain pan should be piped
to an adequate drain or through the
structural fl oor of the enclosure.
• Do not obstruct the combus on and
ven la on air openings.
• If the water heater is installed
directly on carpe ng, it shall be
installed on a metal or wood panel
extending beyond the full width and
depth of the water heater by at least
3 in (76.2mm) in any direc on. If the
water heater is installed in an alcove
or closet, the en re fl oor shall be
covered by the aforestated panel.
• Do not install near air-moving devices
such as exhaust fans, ven la on
systems, or clothes dryers.
• Prevent the water lines and discharge
lines from freezing.
General Requirements
• The water heater shall not be
installed in the occupied space of
the manufactured (mobile) home.
• Inspect and maintain your water
heater in accordance with this
manual’s instruc ons. Inspect the
drain pan, pipes, and surrounding
area regularly and fi x any leaks found.
• At least annually, check and clean the
air fi lter. See the maintenance sec on
for steps on cleaning the air fi lter.
Gas Piping
Requirements
Gas piping must be installed according
to local and state codes or, in the
absence of local and state codes,
the NaƟ onal Fuel Gas Code, ANSI
Z223.1(NFPA 54)-current edi on.
Manufactured home manufacturers
must conform with The Manufactured
Home ConstrucƟ on and Safety
Standard, Title 24 CFR, Part 3280.
NOTICE: When installing gas piping,
apply pipe joint compound or Tefl on®
tape approved for fuel gases.
Figure 4: Gas Piping
1. Install a readily accessible manual
shut-off valve in the gas supply line
as recommended by the local u lity.
Know the loca on of this valve and
how to turn off the gas to this unit.