Maytag HRN11240P, User Manual

13

FIGURE 16.

Insulation Blankets

Insulation blankets available to the general public for external
use on gas water heaters are not necessary with Maytag
products. The purpose of an insulation blanket is to reduce the
standby heat loss encountered with storage tank heaters. Your
Maytag water heater meets or exceeds the National Appliance
Energy Conservation Act standards with respect to insulation
and standby loss requirements, making an insulation blanket
unnecessary.

Should you choose to apply an insulation blanket to this heater,
you should follow these instructions (See Figure 7 for
identification of components mentioned below). Failure to follow
these instructions can restrict the air flow required for proper
combustion, potentially resulting in fire, asphyxiation, serious
personal injury or death.

•

Do not

 apply insulation to the top of the water heater, as this

will interfere with safe operation of the draft hood.

•

Do not

 cover the outer door, thermostat or temperature &

pressure relief valve.

•

Do not 

allow insulation to come within 2” (50.8 mm) of the

floor to prevent blockage of combustion air flow to the burner.

•

Do not

 cover the instruction manual. Keep it on the side of

the water heater or nearby for future reference.

•

Do

 obtain new warning and instruction labels from Maytag

for placement on the blanket directly over the existing labels.

•

Do

 inspect the insulation blanket frequently to make certain

it does not sag, thereby obstructing combustion air flow.

Combustion Air and Ventilation for
Appliances Located in Unconfined Spaces

UNCONFINED SPACE

 is space whose volume is not less than

50 cubic feet per 1,000 Btu per hour (4.8 m

3

 per kW) of the

aggregate input rating of all appliances installed in that space.
Rooms communicating directly with the space in which the
appliances are installed, through openings not furnished with
doors, are considered a part of the unconfined space.

In unconfined spaces in buildings, infiltration may be adequate
to provide air for combustion, ventilation and dilution of flue
gases.  However, in buildings of tight construction (for example,
weather stripping, heavily insulated, caulked, vapor barrier, etc.),
additional air may need to be provided using the methods
described in 

Combustion Air and Ventilation for Appliances

Located in Confined Spaces

.

Combustion Air and Ventilation for
Appliances Located in Confined Spaces

CONFINED SPACE

 is a space whose volume is less than

50 cubic feet per 1,000 Btu per hour (4.8 m

3

 per kW)  of the

aggregate input rating of all appliances installed in that space.

A. ALL AIR FROM INSIDE BUILDINGS:

(See Figure 9 and 10 on page 11 and Figure 17 below)

The confined space shall be provided with two permanent

openings communicating directly with an additional room(s)
of sufficient volume so that the combined volume of all spaces
meets the criteria for an unconfined space.  The total input of
all gas utilization equipment installed in the combined space
shall be considered in making this determination.  Each
opening shall have a minimum free area of one square inch
per 1,000 Btu per hour (22 cm

2

/kW) of the total input rating of all

gas utilization equipment in the confined space, but not less
than 100 square inches (645 cm

2

).  One opening shall

commence within 12 inches (30 cm) of the top and one
commencing within 12 inches (30 cm) of the bottom of the
enclosures.

FIGURE 17.

• Install water heater in accordance

with the instruction manual and
NFPA 54.

• To avoid injury, combustion and

ventilation air must be taken from
outdoors.

• Do not place chemical vapor

emitting products near water
heater.