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TABLE OF CONTENTS
Specifications .............................................................................. Page 3
Rules for Safe Operation ............................................................. Page 4-5
General Overview of Aquastar .................................................... Page 6
Locating the Heater for Safe Proper Combustion........................ Page 7
Installation ................................................................................... Page 8
Connecting Gas and Water Lines & Pressure Relief Valve ......... Page 9-10
Vent Pipe Connection .................................................................. Page 10
Safety Before Lighting .................................................................Page 11
Lighting Instructions .................................................................... Page 11
Setting Water Temperature ..........................................................Page 12
Maintenance & Service ............................................................... Page 12-14
Trouble Shooting ......................................................................... Page 14-18
Cleaning Pilot Assembly .............................................................. Page 19
Calibration and Thermostat Test.................................................. Page 20-21
Description of Operation and Parts Layout Diagrams ................. Page 22-26
Gas Line Size, Vent Size & Height Guide Lines .......................... Page 27
This well engineered, tankless gas water
heater has all the features a water heater
should have:
The instantaneous principle of heating water is
very simple. Cold water enters the heater when
a hot water faucet is opened. This flow of water
causes the gas valve to open. Gas flows to the
burners and is ignited by the pilot flame. The heat
exchanger then absorbs the heat generated by
the burners and transfers it to the cold water as it
travels through the heat exchanger. When the hot
water is turned off, the gas valve automatically
closes and the burners shut off. Your hot water
faucet is an ignition key for hot water. You now
have complete control over your hot water energy
use. [See pages 22-26 for detailed Description
of Operation and Parts Layout Diagrams].
FEATURES
• Automatic thermostatic control for steady
hot water temperature. Burner output is
proportional to water flow for maximum
energy efficiency.
• Automatic thermostatic control for steady
hot water temperature.
• Safety thermocouple at pilot and burner.
• Automatic Energy Cut-Off mechanism.
• Built-in gas shut-off valve.
• Stainless steel burners with stabilized blue
flame.
• Built-in corrosion resistant draft inducer.
• Long working life insured by heavy-duty
high quality materials.
• Compact space saver: mounts on wall
with four screws.
• Easy installation.
• 2.2 gpm (removable) flow restrictor to
ensure water flow will never exceed heater
capacity.