Installation Manual

WHL-019 REV. 12.17.14

PART 8 – START-UP PROCEDURE

FOR YOUR OWN SAFETY READ BEFORE OPERATING

1. This water heater does not have pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light

the burner by hand.

2. BEFORE OPERATING: smell all around the water heater area for gas. Be sure to smell next to the floor because some gas is

heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

 Do not try to light any water heater.

 Do not touch any electric switch; do not use any phone in your building.

 Immediately call your gas supplier from a neighbor's phone. Follow the gas suppliers' instructions.

 If you cannot reach your gas supplier, call the fire department.

 Turn off gas shutoff valve (located outside of the water heater) so that the handle is crosswise to the gas pipe. If the handle will

not turn by hand, don't try to force or repair it, call a qualified service technician. Force or attempted repair may result in a fire

or explosion.

4. Do not use this water heater if any part has been under water. Immediately call a qualified service technician to inspect the water

heater and to replace any part of the control system and any gas control that has been damaged.

5. The water heater shall be installed so the gas ignition system components are protected from water (dripping, spraying, rain, etc.)

during water heater operation and service (circulator replacement, condensate trap, control replacement, etc.)

Failure to follow these instructions could result in property damage, serious personal injury, or death.

A. OPERATING INSTRUCTIONS

If you smell gas, STOP. Follow listed safety instructions above. If you do not smell gas, follow the next steps.

1. Turn on all electric power to water heater. Make sure tank is full with cold water and purge all piping. To assure adequate purging,

open all hot water faucets.

Ensure the water heater is full of water before firing the burner. Failure to do so will damage the heater. Such damage IS NOT covered

by warranty, and could result in property damage, serious personal injury, or death.

2. Adjust the temperature set point of the heater to the desired level. The factory default setting is 119

F. If changes are necessary,

follow “Overall Water Heater and Control Operation” in this section.

3. If the water heater fails to start, refer to the Troubleshooting section in the back of this manual.

B. OVERALL WATER HEATER AND CONTROL OPERATION

To adjust the temperature of stored water, press and hold {S3} for 2 seconds. The first item is: DU: Water Temperature Set Point –

factory set at 119°F. Adjust down by pressing {S1} to a temperature as low as 95°F. Adjust up as high as 160°F by pressing the {S2}.

Press {S3} again to display DH, the differential which is factory set at 7°F and adjustable down to 1°F by pressing {S1} and up to 18°F

by pressing {S2}. Note: Due to the highly advanced control on this water heater, which compensates for varying inlet water

temperature, the actual differential temperature may vary slightly from your setting. Press {S3} again to display the factory default

temperature measurement in Fahrenheit. Change the default to Celsius by pressing {S1}. When finished, press {S3} one final time to

place unit back into operation. The control automatically re-starts if no key is pressed for 2 minutes.

C. STATUS MENU

Installers are also able to check the current status of the heater parameters by pressing {S4} for 3 seconds. Once activated, the display

will show |d1| alternating value of the actual upper supply tank temperature. Actual values are displayed for each function. To view the

next value, simply press {S/4} to go to the next displayed value. Listed below are the values which can be displayed. These values

cannot be changed. To exit this menu, press {S3} to resume normal operation.

Function Value

|d1| — Actual temperature from upper tank sensor

|d2| — Actual temperature from lower sensor