Operation; General; Normal Operation; Start Up - AquaStar 240 FX Installation And Owner's Manual

OPERATION

General

The AQ240FX Water Heater is an instantaneous,
tankless water heater
household and commercial hot water with total
efficiency. The principle behind the AQ240FX Water
Heater is simple. Once you open a hot water tap,
water flows through the water heater. The water
flow sensor signals the computer to electronically
ignite the burners and the computer monitors the
water temperature, volume of water, and gas flow
the insure you get the right amount of hot water.
After the burners are ignited the "fire on" lamp is lit.
The burners activate at a .75 gallon per minute flow
rate. After the burners are ignited, the flow rate can
be lowered to 0.6 gallons per minute to maintain the
heater on.
Now as long as you have water, adequate gas
supply and electricity, you will get an endless flow
of hot water. Open a hot water tap to turn on the
water heater. Close the tap to turn off the water
heater.

Normal Operation

To Turn on water heater
1. Open a hot water tap.
2. Burners ignite, "Fire On" lamp is lit and the
exhaust fan operates.
3. Mix with cold water to get the correct
temperature water.
To Turn off your water heater
1. Close the hot water tap
designed to supply
2. "Fire On" lamp extinguished, the exhaust fan
will continue to operate for 70 seconds.
Once the unit has been properly installed, check the
gas and water connections for leaks. Check for
proper ventilation and combustion air to the heater.
Purge the gas and water lines to remove debris.
Then follow these steps to turn on your unit.
1. Close the manual gas control valve located on
the gas line.
2. Fully open the manual water control valve on
the water supply line.
3. Open a hot water tap, to verify that water will
flow to that tap. Then close the hot water tap.
4. Fully open the manual gas control valve
installed.
5. Turn on the 120 volt 60 Hz power supply to the
water heater.
The 240FX has been set at the factory to deliver
122º F (50º C) water. This is electronically
controlled by the computer. When drawing hot
water, mix with cold water if necessary to get a
desired temperature.
See degree rise table on page 22.
WARNING : Temperatures above 125º F (52º C)
can cause severe burns or death from scalding.
Children, the disabled and the elderly are at high
risk of being injured. Feel the water temperature
before bathing or showering. Do not leave children,
disabled, and the elderly unsupervised.
The inlet water temperature will dictate how
much hot water you can produce, but you will
not be able to produce more than 5.3 gallons
per minute of hot water because there is a flow
governor restricting the water flow.
Freeze Prevention Devices
This unit comes equipped with heaters that
discourage the unit from freezing in an outdoor
4

Start Up

Temperature