7
MFH-I&S-02
CAUTION:
Operation of this water heater in air contaminated by
perchloroethylene, any chlorinated hydrocarbon or strong oxidizing agents, will result
in serious damage to brass orifices, internal steel parts and void the warranty.
IMPORTANT
– BURNER MUST BE LEVEL.
Models containing a cast iron burner
are equipped with an adjustable air shutter. The air shutter on the front of the main
burner must be adjusted when the water heater is installed. See installation instructions
for proper air shutter adjustment procedures.
STATE OF CALIFORNIA NOTICE
WARNING:
This water heater must be braced, anchored or strapped to
avoid falling or moving during an earthquake. See instructions for correct installation
procedures.
WARNING:
If not installed, operated and maintained in accordance with
the manufacturer’s instructions this product could expose you to substances in the fuel
or form combustion which can cause death or serious illness including, cancer, birth
defects or other reproductive harm.
SUITABLE FOR WATER (PORTABLE) HEATING AND SPACE HEATING
Toxic chemicals, such as used for boiler treatment, shall not be introduced into potable
water heater used for space heating. This water heater may never be connected to any
existing heating system or component(s) previously used with a nonpotable water
heater appliance.
THERMOSTAT ADJUSTMENT
The thermostat dial is adjusted to its lowest temperature position when shipped
from the factory. When adjusting the thermostat it should be remembered
that lower temperature settings are more energy efficient. To adjust the
thermostat, turn the dial clockwise until the minimum acceptable temperature
is set. It is suggested that the starting point setting not exceed the “HOT” mark
[approximately 120
°
F
(49
°
C)
] on the thermostat, as indicated in Figure 2.
Figure 2
IMPORTANT
The water heater should be inspected at a minimum annually by a
qualified service technician for damaged components and/or joints
not sealed. DO NOT operate this water heater if any part is found
damaged or if any joint is found not sealed.
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within
five (5) seconds at a temperature setting of 135°F
(57°C)
. To protect
against hot water injury, install an anti-scald tempering valve in the water
system. This valve will reduce point of discharge temperature by mixing
cold and hot water in branch water lines. A licensed plumbing professional
or local plumbing authority should be consulted.
Note:
This water heater is equipped with an energy cut out device to
prevent overheating. 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 does
not indicate a leak. It will disappear when the tank becomes heated.
WARNING
Water heaters are heat producing appliances. To avoid damage or injury there
shall be no materials stored against the water heater or vent-air intake system
and proper care shall be taken to avoid unnecessary contact (especially by
children) with the water heater and vent-air intake system.
UNDER NO
CIRCUMSTANCES SHALL FLAMMABLE MATERIALS, SUCH AS
GASOLINE OR PAINT THINNER BE USED OR STORED IN THE
VICINITY OF THIS WATER HEATER, VENT-AIR INTAKE SYSTEM OR IN
ANY LOCATION FROM WHICH FUMES COULD REACH THE WATER
HEATER OR VENT-AIR INTAKE SYSTEM.
Figure 3
BURNER FLAME CHECK
Steel Burner:
These models are equipped with self adjusting air mixture and
do not have an adjustable air shutter (
See Figure
3). At periodic intervals, a
visual check of the main burner and pilot flames should be made to determine
if they are burning properly. The main burner flame should light smoothly from
the pilot.
MAINTENANCE
The following maintenance should be performed by a qualified service technician
at the minimum periodic intervals suggested below. In some installations, the
maintenance interval may be more frequent depending on the amount of use
and the operating conditions of the water heater. Regular inspection and
maintenance of the water heater and vent-air intake system will help to ensure
safe and reliable operation.
1. Annually check the operation of the thermostat.
2. The flow of combustion and ventilation air
MUST NOT
be restricted. Clear
the combustion air openings of any dirt, dust, or other resctrictions.
WARNING!
The ventilation air system may be
HOT.
3. At all times keep the water heater area clear and free from combustible
materials, gasoline and other flammable vapors and liquids.
4. Bi-annually conduct a visual check of the main and pilot burner flames to
determine that they are burning properly. See Burner Flame Check section
on page 7.
5. Annually remove the inner door and main burner assembly to clean orifices
and related parts of any dirt or other foreign material. Inspect the burner
ports for obstructions or debris and clean with a wire brush as needed. Wire
brush and/or vacuum clean the combustion chamber as needed to remove
scale deposits and debris.
Note:
It is imperative for proper operation of
the water heater that the inner door be replaced in the original location.
