WARNING
: Improper installation,
adjustment, alteration, service or maintenance can
cause injury or property damage. Refer to this manual.
For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
Upon completion of the installation, these instructions
should be handed to the user of the appliance for
future reference.
FEATURING: Automatic Variable Power Modulating Gas
Valve, Electronic Ignition and Power Venting
INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATER FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125FX LP and 125FX NG
(Flow Modulated with Electronic Ignition and Power Venting – a Type III Category Appliance)
Suitable for heating potable water only
Not approved for space heating purposes
Intended for variable flow applications with steady cold water inlet temperatures.
For preheated domestic hot water, install the 125 BS model. For recirculating applications, install the 125 BL model.
WARNING
If the information in this manual is not followed
exactly. A fire or explosion may result causing property
damage, personal injury or death.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable,
combustible or corrosive vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
- Close gas valve. Open windows.
- Do not try to light any appliance.
- Do not touch any electrical switch; do not use any
phone in your building.
- Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
- If you cannot reach your gas supplier, call the fire
department.
- Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
Specifications .................................................... Page 2
Rules for safe operation .................................... Page 4
Locating the Heater ............................................ Page 4
Combustion Air Requirements ............................ Page 5
Mounting the Heater ........................................... Page 6
Venting the Heater ............................................. Page 6
Gas Connections ............................................... Page 9
Water Connections .......................................... Page 10
Electrical Connections ...................................... Page 11
Safety before turning on the heater ................... Page 12
Lighting and Operating instructions .................. Page 12
Setting water temperature ................................ Page 12
Maintenance & Service..................................... Page 13
Trouble Shooting .............................................. Page 14
Diagram of AquaStar......................................... Page 17
Components and Parts List .............................. Page 18
TABLE OF CONTENTS
6
720
606
455
(01.05)
J
S 2
Principle of Operation:
When a hot water faucet is opened, the flow of water through
the heater causes the gas valve to open. At the same time
a microswitch is activated which sends a spark to the pilot.
The flame sensor confirms that the pilot has been lighted
and allows the first two burners to ignite. The flame sensor
confirms correct activation and all burners ignite. The pilot
goes out. The power exhaust system runs as long as the
burners are on. The heat exchanger coils absorb the heat
generated by the burners and transfer heat to the water.
When the hot water faucet is shut off, the gas valve
automatically closes and the burners turn off, followed
immediately by the exhaust system. Your hot water faucet
is an ignition key to turn on the water heater, giving you
control over your hot water energy use. Every time you turn
off your hot water faucet, the energy consumption for hot
water returns to zero.
FEATURES
- Electronic Pilot Ignition
- On/Off switch to activate system
- Power Venting with safety shutoff
- High Quality Materials for Long Working Life.
- Copper heating coils for endless supply of hot water.
- Burner output proportional to hot water flow demand for
maximum energy efficiency.
- Safety flame sensor at pilot burner.
- Automatic overheating protection shut-off sensor.
- Stainless steel burners with stabilized blue flame.
- Built-in corrosion resistant power venter.
- Compact space saver: mounts on a wall with two hooks.
- Easily removable one-piece cover.
- Easy one person installation.
- Adjustable water flow restrictor to ensure that water flow
demand will not exceed the heating capacity of the heater.
AquaStar 125FX LP and 125FX NG Specifications
Water Connection 1/2” Thread fitting
H x W x D 29 3/4” x 18 1/4” x 8 3/4"
Vent 4” (Category III Gas Appliance)
Gas Connection 1/2” NPT thread
Min. Water Pressure 18 Psi
Max. Water Pressure 150 Psi
Shipping Weight 50.6 LB
Net Weight 44 LB
2.0 GPM at 90° rise
4.0 GPM at 45° rise
Min. Water Flow 1/2 gal/min
120V/60Hz 1.2 Amps
LP GAS Supply Pressure inlet. min. 11” W.C.*
max. 14” W.C.*
LP GAS Manifold pressure 9.9” W.C.**
Natural Gas Pressure inlet min.: 7” W.C.*
max.: 14” W.C.*
Natural Gas Manifold Pressure 5.38 W.C.**
* Inlet gas pressure must not exceed this value
** For purposes of input adjustment
UNPACKING THE AQUASTAR HEATER
This heater is packed securely. The box includes two water connection fittings, a control knob, a gas pressure regulator,
a pressure relief valve, an incandescent particle tray, two hooks for hanging the heater, this manual, a personal letter, a
warranty statement and a warranty registration card. Do not lose this manual as there is a charge for replacement.
Please complete and return the enclosed warranty registration card.
AQ125FXNG
AQ125FXLPG
max. 130 000 Btu/hr 125 000 Btu/hr
min.
28 000 Btu/hr
28 000 Btu/hr
Gas input 3
MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON
COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS
FRONT VIEW
SIDE VIEW
AQUASTAR MODEL 125FX
D084_089
* Some local codes require 18” in garage installations
MODEL 125FX
TOP (A)
12"
FRONT (B)
4"
BACK
0"
SIDES
4"
FLOOR (C)
12" *
FLUE DIAMETER
4" 4
GENERAL RULES TO FOLLOW
FOR SAFE OPERATION
1. You should follow these instructions when you install
your heater. In the United States: The installation must
conform with local codes or, in the absence of local codes,
the National Fuel Gas Code ANSI Z223.1/NFPA 54.
In Canada: The Installation should conform with CGA
B149.(1,2) INSTALLATION CODES and /or local installation
codes.
2. Carefully plan where you install the heater. Correct
combustion air supply and flue pipe installation are very
important. If not installed correctly, fatal accidents can be
caused by lack of air, carbon monoxide poisoning or fire.
3. The place where you install the heater must have
enough ventilation. The National Fire Codes do not
allow gas fired water heater installation in bathrooms,
bedrooms or any occupied rooms normally kept
closed. See the section below on locating the heater.
4. You must install your heater so that the venting complies
with all requirements. Venting must comply with all
requirements for Category III gas appliances. See section
on Venting the Heater, pages 6 and 7.
5. The appliance must be disconnected from the gas supply
piping system during any pressure testing at pressures in
excess of 1/2 Psig (3.5 kPa).
The appliance must be isolated from the gas supply piping
during any pressure testing of the gas supply piping system
at test pressures in excess of 1/2 Psig (3.5Kpa). The
appliance and its gas connection must be leak tested before
placing the appliance in operation.
6. Keep water heater area clear and free from combustibles
and flammable liquids. Do not locate the heater over any
material that might burn. Do not install heater over carpeting.
7. Correct gas pressure is critical for the optimum
operation of this heater (see specifications on page 2 and
chart on page 9). Gas piping must be sized to provide the
required pressure at the maximum output of the heater.
Check with your local gas supplier, and see the section on
connecting the gas supply.
8. Should overheating occur or the gas supply fail to shut
off, turn off the gas supply at the manual gas shut off valve
on the gas line.
9. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the control
system and any gas control that has been under water.
10.When installed, the appliance must be electrically
grounded in accordance with local codes or, in the absence
of local codes, in accordance with the National Electrical
Code ANSINFPA 70 and/or the CSA 22.1 Electrical Code.
PROPER LOCATION FOR INSTALLING
YOUR HEATER
Carefully select the location of your new heater. For your
safety and for proper heater operation, you must provide an
abundant supply of combustion air and a proper venting
installation.
The heater may still operate even when improperly vented.
It will, however, be less efficient and could eventually damage
the heater. It could even result in human sickness or death
due to oxygen deprivation and carbon monoxide poisoning.
Before installing the unit, be certain you have the correct
heater for your type of Gas – Propane or Natural Gas.
Identification labels are found on the shipping box, and on
the rating plate which is located on the right side panel of
the cover. Also, each burner orifice is stamped with a number
(79 for LPG and 120 for Natural Gas).
Follow the guidelines below:
1. National building codes require that you do not install
this appliance in bathrooms, bedrooms, unvented
closet or any occupied rooms normally kept closed.
2. Simult