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INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125B LP and 125B NG (Flow Modulated)
Suitable for water (potable) heating and space heating
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
: 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
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
- 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.
TABLE OF CONTENTS
Specifications .................................................... Page 2
Rules for safe operation .................................... Page 4
Locating the Heater ........................................... Page 5
Combustion Air Requirements ........................... Page 5
Mounting the Heater .......................................... Page 6
Venting the Heater ............................................. Page 6
Gas Connections ............................................... Page 7
Water Connections ............................................ Page 8
Safety before lighting the pilot ............................ Page 8
Lighting instructions ........................................... Page 9
Setting water temperature ................................. Page 9
Trouble Shooting ............................................. Page 10
Diagram of AquaStar ....................................... Page 13
Components and Parts List ............................. Page 14
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Summary of Contents for AquaStar 125B LP
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Page 1: Table Of Contents
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND LIQUEFIED PETROLEUM GAS MODEL 125B LP and 125B NG (Flow Modulated) Suitable for water (potable) heating and space heating Intended for variable flow applications with steady cold water inlet temperatures. For preheated domestic hot water, install the 125 BS model. -
Page 2: Specifications
“on demand”. When a hot water faucet is opened, cold water flows through the coils of the heat exchanger in the Aquastar. This same flow opens the gas valve, and the burners are ignited by the pilot flame. The heat exchanger coils absorb the heat generated by the burners and trans- fer heat to the water. - Page 3 FRONT VIEW MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE INSTALLATIONS AQUASTAR MODELS 125B / 125BL / 125BS / 125X MODEL 125B / 125B LOW PRESSURE / 125B SOLAR / 125X TOP (A) FRONT (B) BACK SIDES...
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Page 4: Rules For Safe Operation
If you are using the AquaStar for combined space heating and potable water heating (see schematic diagram below) , all piping and other components connected to the system must be suitable for potable water, (b) toxic chemicals such as those commonly used for boiler... -
Page 5: Combustion Air Requirements
Confirm that your Aquastar is venting properly when all these other appliances are running. See section on venting. -
Page 6: Mounting The Heater
WARNING Note: The burners of an instantaneous “on demand” water heater such as the AquaStar are only on at the time that hot water is actually being used, the venting stack is WALL STUDS therefore cold except for the short durations when hot water... -
Page 7: Gas Connections
The flue connection for the AquaStar 125B is 5 inches. However, in Canada, for installations at high altitude (2000- 4500 feet above sea level) a six inch flue is required. A 5" by 6" flue adaptor must be affixed to the flue collar of the AquaStar with at least two screws. -
Page 8: Water Connections
Be certain there are no loose particles or dirt in the piping. Blow out or flush the lines before connecting to the AquaStar. A ball valve should be installed on the cold water feed line to facilitate servicing the heater. -
Page 9: Lighting Instructions
It just does not make sense to overheat water and then mix in cold to cool it off. You cannot run out of hot water with an AquaStar, so set the dial for the temperature you prefer . Note: 105 ° F is the maximum recommended for a hot bath. -
Page 10: Trouble Shooting
Air screen filter TROUBLE SHOOTING Introduction The AquaStar 125 burners are activated by a water flow valve. Numerous water related problems can cause this water valve to malfunction such as: Insufficient water flow volume to activate the burners at its minimum flow requirement;... - Page 11 — i.e. when a hot water faucet is opened. If there is a crossover in the plumbing, the necessary pressure drop in the AquaStar will be insufficient, or totally eliminated. A plumbing crossover can be caused by a bad washer at a single lever faucet or incorrect plumbing or a mixing valve in the line, etc.
- Page 12 Note: This will increase the activation flow rate. 2. Inlet water temperature is too high (as with solar preheated water) Note: Only the Model “S” AquaStar should be used if the inlet water is preheated. 3. Reduce inlet gas pressure WATER IS NOT HOT ENOUGH 1.
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Page 13: Diagram Of Aquastar
Pilot assembly Burner manifold gas pressure test nipple Main gas burner Pilot gas tubing Gas valve Pressure tap screw location Diagram of AquaStar 125 B Gas control slide Piezo igniter Water valve Temperature adjustment selector Gas inlet gas pressure test nipple... -
Page 14: Components And Parts List
- INTERIOR COMPONENTS DIAGRAM AND PARTS LIST Fig. 12... - Page 15 INTERIOR COMPONENTS DIAGRAM Cover Plastic collar Temperature adjustment knob Panel back Draft divertor Heat exchanger Hot water pipe Cold water pipe Heat exchanger washer Overheat sensor (ECO) Main burner assembly Main burner assembly Pilot burner assembly Pilot air screen Piezo electrode Pilot orifice “...
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Page 16: Installation Checklist
Nominal Iron Pipe Size* MAXIMUM LENGTH Semi-rigid Tubing MAXIMUM LENGTH * Flex tubing greatly reduces capacity and, therefore, is not recommended. Minimum Vent Size* and Height Minimum Diameter 5 inches * NOTE: Vent size must not be restricted. Installation must comply with national fuel gas code venting requirements for a 117,000 Btu Category I appliance and any applicable local codes.