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Part 9 - Controls
A. Start-Up
Once the unit has been properly installed, check the gas and water
connections for leaks. Check for proper ventilation and combustible
air supply to the water heater. Purge the gas and water lines to
remove debris. Then follow the steps below to power on the water
heater.
1.
Close the manual gas shut-off valve located on the gas line.
2.
Fully open the manual water shut-off valve on the water supply
line.
3.
To ensure complete filling of the tank, allow air to exit by
opening the nearest hot water faucet. Allow water to run until a
constant flow is obtained. This will let air out of the water heater
and piping.
4.
Open each hot water tap to ensure that water will flow. Then
close the hot water tap.
5.
Fully open the manual shut-off gas valve.
6.
Plug in the 120 VAC / 60 Hz power supply to the water heater
and turn on the unit.
DO NOT use this water heater unless it is completely filled with
water. Water must flow from the hot water faucet before turning
"ON" gas to the water heater. The water heater will be damaged
if it is operated while empty. Such damages ARE NOT covered by
product warranty.
B. How to Use the Control Interface
1.
To turn the Water Heater LCD Display from ON to OFF, press the
Button. The current stored water temperature setting will
display. Press the
or
setting.
2.
When tank water temperature is lower than setting temperature,
the water heater will start the burner automatically and LCD
monitor will display IN USE.
3.
To turn the water heater display OFF press
NOTE: The temperature on the LCD display does not control the
output temperature of the water heater. To adjust hot water output
temperature, see Section B.
buttons to select your temperature
.
Figure 42 - LCD Display Detail
C. Temperature Setting Procedure
The water heater is shipped ready to operate at NORMAL 127
o
(52.7
C), and can be field adjusted to operate at HOT (137
o
o
and HOTTER (147
F [63.8
C]) temperatures.
After turning on the water heater and selecting the temperature
setting, let it operate and come to temperature.
After the water heater comes to temperature, open a hot water faucet.
The water heater mixing valve is factory set to operate at 120
o
(48.9
C). The mixing valve setpoint temperature can be adjusted from
o
o
70 – 145
F (21.1 - 62.8
C).
To adjust the mixing valve:
1.
Ensure the water heater is filled with water and powered on.
2.
Loosen the knob screw. Lift knob.
3.
Turn knob clockwise or counter clockwise to adjust temperature.
The temperature will change on the water heater display. Adjust
to the desired temperature.
4.
Reposition knob to lock position.
5.
Retighten screw.
NOTE: To ensure proper operation, the mixing valve temperature
o
should be set at least 5
F below that of the tank setpoint temperature.
Households with small children, disabled, or elderly persons may
o
require a 120
F or lower temperature setting to prevent severe
personal injury or death due to scalding.
Hotter water increases the risk of scald injury. Scalding may occur
within 5 seconds at a setting of 140
o
over 125
F can instantly cause severe burns, or death, from scalds.
Children, disabled, and elderly are at the highest risk of being scalded.
Mixing valve temperature settings should be done by a licensed
contractor per local requirements. To ensure correct temperature
control, check water temperature with a thermometer at a faucet.
Feel water before bathing or showering!
It is recommended to inspect the mixing valve annually. Ensure
the proper water temperature is being delivered. If not, replace the
mixing valve.
whl-605 Rev. 002 Rel. 000 Date 1.23.19
41
o
o
o
F [58.3
C])
o
o
o
F (60
C). Water temperature
F
F
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