G-8
H-093630_EN • 00
TEXAS 99 - 230
General Description
This floor-standing storage water heater is a com-
pact, low-emission condensing appliance with a
pre-mix burner and a stainless steel heat exchanger.
The fully radial burner ensures a high modulation ra-
tio, combustion stability and very low NOx emissions.
This appliance produces Domestic Hot Water
through a unique and proven helical “fire-tube” heat
exchanger, that offers a large heat exchange surface
to optimise energy and heating efficiency. The heat
exchanger is built inside a stainless steel tank, that
can store and deliver large volumes of hot water.
The appliances are built for natural gas but can
be converted to operate with liquefied petroleum
gas (propane), by performing combustion and fan
speed adjustments according to the procedure
provided in this manual. The conversion process
should take place before commissioning and com-
ply with applicable local regulations and standards.
The water circuit of appliance is
provided with a
built-in circulation pump to allow internal circulation
of water inside the tank.
The hinged front door and access panel make it
easier to access control panel and electronic com-
ponents, as well as the internal pump.
Frost Protection
The TEXAS water heaters have a built-in an ti-frost
protection. The pump and the burner are started as
required when the water temperature drops below
5°C (as measured by the appliance internal sensor
installed on the return circuit).
The pump and/or burner will turn off when the tem-
perature reaches the required setpoint.
P
roduct
d
escrIPtIon
The anti-frost protection function only protects the
appliance, not the entire system.
Safety Devices
The water heaters of the TEXAS range are equipped
with a series of sensors and switches that provide
safety for your appliance and water circuit, such as:
î
Water circuit temperature sensors (inlet/outlet)
î
Gas pressure switch
î
Flue pressure switch
î
Air pressure switch
î
Water high limit switch
î
Burner door high limit switch
î
Flue temperature sensor
î
Alarm contacts
The TEXAS water heaters
are not
provided with
the following mandatory safety equipment that the
installer must place in the system, in accordance
with the applicable local standards and regulations:
î
A DHW expansion tank, suitable for the system
size
î
A safety group and manometer.
Optional equipment
Some optional equipment can be used with the
TEXAS water heaters. Please contact your AIC
representative for more information and a list of
available equipment.
To lengthen the life of your appliance and heating
system, in addition to the characteristics of the hy-
draulic circuit described in
“Requirements for the
Hydraulic Circuits” on page I-31,
the following
equipment can be installed in the circui
t:
î
Water filter
î
Dirt separator
î
Air separator