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Tech Info for AquaStar 125FX Series Water Heaters
General information for installing the AquaStar 125FX tankless gas water heater. See installation manuals
for more detailed info about these quality on demand water heaters.
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Installation info for the Aquastar gas water heater Model 125FX
Follow information provided on this page.
Installation and
service must be performed by a qualified installer, service agency or the gas
supplier.
Other tips: when venting the 125 Series water heater - it is best to rise 12" off
top of hot water heater before making any 45 or 90 degree elbows , then rise ¼" per
foot when running any horizontal vent pipe. Size gas line properly. Install the
provided gas regulator with its directional arrow facing the gas flow path (also
be sure to properly regulate Liquid Propane (LP) Natural Gas at source when
supplying Aquastar), this small regulator that is provided is NOT to be used on
a high pressure line.
·Required clearances
| MODEL 125FX Series |
Amount |
| TOP |
12" |
| FRONT |
4" |
| BACK |
0" |
| SIDES |
4" |
| FLOOR |
12" |
·Gas & Venting AquaStar 125FX
| Gas |
1/2" |
5/8" |
3/4" |
7/8" |
1" |
| Liquid Propane (LP) |
Not Recommended |
20 feet |
60 feet |
150 feet |
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| Natural Gas |
10 feet |
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40 feet |
|
150 feet |
| Venting (Horizontal Only) |
Diameter |
Max Length |
| 4 inches |
15 feet with two 90-degree elbows and subtract 5 feet for each
additional elbow. |
*For the AquaStar 125FX - either galvanized or stainless steel sealed pipe.
·Dimensions Model 125FX Series
| Height |
Width |
Depth |
Weight |
| 29-3/4" |
18-1/4" |
8-3/4" |
45 lbs. |
·Combustion Air Required Model 125 Series
In order to ensure an adequate supply of combustion air, the
National Fuel Gas Code requires that any conventional vented gas appliance be
installed in a room with a minimum volume of 50 cubic feet per 1,000 Btu/hr
rated input. The following is the minimum size of the open space in which the
Aquastar tankless water heater Model 125 X may be installed in compliance
with this requirement:
| Model |
Volume |
Area with an 8' ceiling |
| 125 Series |
6,400 cubic feet |
800 square feet |
If the Aquastar water heater is installed in an area smaller than indicated
above, then the installer must make special provisions for combustion air in the
form of two openings, each one within 12" of the top and 12" of the bottom of
the space, having a total free area of 1 square inch per 1,000 Btu/hr of rated
input if the air is taken from inside the house. This requirement reduces to 1
square inch per 4,000 Btu/hr if the air is taken from the outside.
Note: This calculation assumes normal rates of
"infiltration" of outside air. A super-insulated, super-tight space/building may
require outside air for the Aquastar water heater even though the volume/area of the space
meets this application.
Caution: In addition to the above, the Aquastar gas water heater must be
properly vented to ensure safe and efficient operation.
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Need more information - read, download or print a full AquaStar 125FX Series Manual.
Install Manuals
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