Installation Guide
Residen al Gas Water Heater Use and Care Guide for Manufactured Homes • 23
OPERATION
fans, etc.) in your home. Also, close any
fi replace dampers.
3
Allow the water heater’s main
burner to operate for fi ve
minutes. Pass a newly
ex nguished match approximately one
inch from the dra hood’s relief opening.
Smoke from the match should be steadily
drawn into the opening indica ng the
water heater is ge ng adequate air and
the vent system is working.
Figure 33: Test the air supply and vent to make
sure the water heater has adequate air and is
venting properly.
4
If the main burner has been
opera ng for fi ve minutes but
the match smoke dri s around
or is blown away from the opening, turn
the gas control knob OFF. Inspect the vent
system and repair if necessary. In many
cases, failure to pass the air supply and
vent test indicates the water heater is not
ge ng enough air or there is a problem
with the vent system. It may be necessary
to increase the air supply.
WARNING! Burn Hazard. Do not
touch the vent, doing so can cause
burns. If the dra hood does not draw
in smoke from a match a er fi ve
minutes of main burner opera on, shut
the gas supply off , and do not operate
the water heater un l the vent system
and air supply have been checked by a
qualifi ed person and repaired if
necessary. Con nuing to operate the
water heater in this condi on could
lead to serious injury or death from
carbon monoxide poisoning.
Temperature Control
System
Adjus ng the Temperature
With the installa on steps completed,
you may adjust the water heater’s
temperature se ng if desired.
1
Set the gas valve to the desired
temperature. The “HOT”
se ng sets the water
temperature to approximately 120°F,
reducing the risk of scald injury. You
may wish to set a higher temperature to
provide hot water for automa c
dishwashers or laundry machines, to
provide more hot water capacity, and to
reduce bacterial growth. Higher tank
temperatures (140° F) kill bacteria that
cause a condi on known as “smelly
water” and can reduce the levels of
bacteria that cause water-borne
diseases.
WARNING! Higher temperatures
increase the risk of scalding, but even at
120°F, hot water can scald (see Table 1
on page 4).
If you increase the water heater’s
temperature se ng, install Thermosta c
Mixing Valve(s) at each point-of-use to
reduce the risk of scalding.
2
To adjust the water heater’s
thermostat:
Figure 34: Adjust the gas control knob to “HOT”.
Turn the gas control knob on the gas
control valve to the right to the following
se ngs.
• “A” 128°F
• “B” 138°F
• “C” 147°F
• “VERY HOT” 160°F
NOTICE: The temperatures above are
approximates. The actual temperature
of the heated water may vary.
3
Wait for the water to heat up.
If you have no hot water a er
two hours, refer to the
Troubleshoo ng Sec on (page 24).
NOTICE: If the tank is full of cold water,
condensa on may form inside the water
heater. This condensa on may drop on
the burner causing a sizzling sound. In
some cases, you may see a small puddle
on the fl oor. Condensa on is normal and
should go away once the tank reaches its
normal opera ng procedure.
WARNING! If you have increased the
temperature se ng and the
Thermosta c Mixing Valves are not set
properly (or not installed) you could
scald yourself while checking the
temperature.
4
Check water temperature at
several points of use in your
home (for example, bathtub
faucet, shower, or lavatory sink) and
adjust the Thermosta c Mixing Valves as
needed. If you aren’t sure how to adjust
the Thermosta c Mixing Valve se ngs,
or aren’t sure if you have Thermosta c
Mixing Valves, contact a qualifi ed
person.
Opera ng Modes
The gas control valve has two diff erent
opera ng modes: Standard and
Vaca on. The Standard mode allows
you to adjust the water temperature to
your desired se ng. The Vaca on (VAC)
mode holds the water temperature at
55°F and is recommended when not
using hot water for an extended period
of me. The VAC se ng also reduces
energy losses and keeps the tank from
freezing during cold weather but can
cause a Hydrogen gas build up. See
cau on on page 6.
OPERATION