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temperature display in °F or °C, the related LED would be
lighted on the controller.
3. Touch "
" or "
" button to adjust the temperature to
your desired settings. The wall controller settings are from
95°F (35°C) to 124°F (51°C).
The temperature can be selected to operate in two
different methods:
− Method 1: Point of use mixing: Set the controller
temperature to a desired output temperature, typically
elevated above comfortable bathing temperatures. I.E
115°F(46°C). Turn the hot water on, once hot, add cold
water to achieve desired temperature.
− Method 2: Single point use: Set the controller
temperature to a desired output temperature for the
faucet you want to use, typically set to the desired
bathing temperature. I.E. 100°F. The unit will maintain
the set temperature by use of the hot water faucet only,
no need to mix cold water.
4. Turn on the water faucet(s) and use as desired. The water
temperature exiting the appliance (not faucet) will display.
Safe Operation
WARNING
Scald Hazard
● Never let infants, children, elderly adjust the water
temperature or be left unsupervised when using hot water.
Failure to follow instruction may lead to serious injury.
Consider the following points for safe use of the appliance:
● Install an RV water regulator to the inlet of the coach, and
operate between (35-70PSI).
● The factory default water temperature setting is 115°F
(46°C).
● There may be a variation between the temperature
delivered from the ap pliance and the temperature at the
faucet due to water conditions between seasons like hot
summer or the length of pipe from the appliance.
● Always check the water temperature, in reference to the
chart below, by the display (step 3/4) and hand touch
before bathing or with other hot water uses.
Temperature °F (°C)
Time before skin becomes scalded
155 (68)
1 Second
148 (64)
2 Seconds
140 (60)
5 Seconds
133 (56)
15 Seconds
127 (52)
1 Minute
124 (51)
3 Minutes
120 (48)
5 Minutes
100 (37)
Safe Bathing Temperature
Source: Moritz, A.R. / Herriques, F.C.: Studies of thermal injuries:
the relative importance of time and surface temperature in
causation of cutaneous burns A. J. Pathol 1947; 23: 695 - 720.
CCD-0005507 Rev: 09-13-22
Water Control Valve
The water heater is equipped with a water flow control valve,
set from the factory at MAX flow. The valve will reduce the
water flow and capacity through the water heater to improve
water heating performance.
Under extreme conditions, it may be necessary to adjust the
valve accordingly:
● Cold water inlet conditions approximately less than 45°F
(7°C)
● Higher water inlet pressures >65 PSI.
To operate (Fig. 36):
● Reduce water flow: Rotate knob clockwise until a solid
stop.
● Increase water flow: Rotate knob counter clockwise until
a solid stop.
Fig. 36
High Altitude Use
This appliance can be used at high altitude and has been
tested up to 4500ft. For prolonged use at higher altitudes
please contact support@furrion.com.
Antifreeze Function
(for FWH09AFA and FWH09AFA-AM models only)
● The appliance can be used in freezing conditions, by
operating a burner sequence program to keep the
water liquid. The function operates automatically when
the appliance water falls below 43°F (6°C), and it will
automatically shut off when it is warmed.
● It will likely be necessary to manually adjust the water
control valve to the min setting when using the water
heater in freezing conditions.
● If the RV is to be stored, with no use, the water heater
should be winterized appropriately per the instructions on
page 14 "Winterizing Water Heater".
● The freeze protection system only protects the water
heater appliance from freezing and will not prevent
freezing of the water system in the coach. Ensure the
coach is properly insulated and protected from freezing
conditions.
● It is normal for the water heater to operate the burner
system at different frequencies and duration for this
mode.
NOTE: The antifreeze function is in-operable if any of the
following are turned off:
● Water heater appliance
● 12V+ house electric
● Gas supply
- 13 -
Water flow
MIN
MAX
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