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INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
Suitable for water (potable) heating and space heating
Intended for low flow domestic hot water applications with steady cold water inlet temperatures
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.
MODEL 38B LP and NG (Non Modulating)
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 4
Combustion Air Requirements ........................... Page 4
Mounting the Heater .......................................... Page 5
Venting the Heater ............................................. Page 5
Gas Connections ............................................... Page 6
Water Connections ............................................ Page 6
Safety before lighting the pilot ............................ Page 7
Lighting instructions ........................................... Page 8
Setting water temperature ................................. Page 8
Trouble Shooting ............................................. Page 10
Diagram of AquaStar ....................................... Page 13
Components and Parts List ............................. Page 14
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Summary of Contents for AquaStar 38B LP
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Page 1: Table Of Contents
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND LIQUEFIED PETROLEUM GAS MODEL 38B LP and NG (Non Modulating) Suitable for water (potable) heating and space heating Intended for low flow domestic hot water applications with steady cold water inlet temperatures... -
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 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...
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Page 4: Rules For Safe Operation
Confirm that your Aquastar is venting properly when all these other appliances are running. See section on venting. -
Page 5: Mounting The Heater
2000 cubic feet for the Aquastar 38B alone. CLEARANCES The Aquastar 38 B is design certified for installation on a combustible wall and for installation in an alcove or closet with the minimum clearances to combustible and non - combustible construction listed below A. -
Page 6: Gas Connections
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 therefore cold except for the short durations when hot water... -
Page 7: Safety Before Lighting The Pilot
1/2” NPT connections to be made. 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 8: Lighting Instructions
(50°F is average in the U.S.). If you plan to supply the AquaStar 38 B, with preheated water (i.e.) solar installation, the unit could overheat. It will then shut off on safety when the outlet temperature reaches 185°F. -
Page 9: Maintenance & Service
MAINTENANCE AND SERVICE Approximately once a year, the AquaStar should be checked, cleaned and serviced as necessary. To remove the front cover, first remove the incandescent particle tray, then pull off the temperature adjustment knob, unscrew and remove the plastic collar and unscrew the central screw located at the bottom of the front cover. -
Page 10: Trouble Shooting
TROUBLE SHOOTING Introduction The AquaStar 38 burners are ignited 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 — ie. 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 AquaStar and the outlet Compare water temperature at outlet of the AquaStar (hold the AquaStar’s outlet pipe with your hand) and at the tap. If these two are very different, check for mixing valve or plumbing crossover (see “MAIN BURNERS WILL NOT IGNITE...”...
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Page 13: Diagram Of Aquastar
Heat exchanger Pilot assembly Burner manifold gas pressure test nipple Pilot gas tubing Main gas burner Fig. 9 - Diagram of AquaStar 38 B Inlet gas pressure test nipple Gas valve Gas control slide Piezo igniter Temperature adjustment knob Water valve... -
Page 14: Components And Parts List
Fig. 10 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST... - Page 15 Cover Temperature adjustment knob Panel back Draft divertor Heat exchanger Overheat sensor (ECO) Hot water pipe Main burner assembly Main burner assembly Burner assembly washer Piezo electrode Pilot burner assembly Pilot air screen Pilot orifice “ Pilot Tube Thermocouple Gas valve Gas valve Electromagnet Thermocable...
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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 4 inches * NOTE: Vent size must not be restricted. Installation must comply with national fuel gas code venting requirements for a 40,000 Btu Category I appliance and any applicable local codes.