Aquastar 38B NG User Manual

WARNING: Improper installation, adjustment,alteration, service or maintenance can cause injuryor property damage. Refer to this manual. Forassistanc

10TROUBLE SHOOTINGIntroductionThe AquaStar 38 burners are ignited by a water flow valve.Numerous water related problems can cause this watervalve to m

11BURNERS DO NOT IGNITE WHEN HOT WATER ISTURNED ON1. Pilot is not on.Light the pilot. See lighting instructions.2. Pilot lighting push button not turn

12heaters, the burners of a tankless water heater must bevery powerful to heat water instantaneously since they dothis only at the time hot water is a

13Fig. 9 - Diagram of AquaStar 38 B 2 4 810 17911 1. Heat exchanger 2. Pilot assembly 3. Burner manifold gaspressure test nipple 4. Pilot gas tu

Fig. 10 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST

Fig. 10INTERIOR COMPONENTS DIAGRAMAND PARTS LIST 38B1 Cover ¤ 8 705 421 0212 Temperature adjustment knob ¤ 8 702 000 1823 Panel back ¤ 8 705 402 17

GAS LINE SIZENatural GasNominal Iron Pipe Size* 3/8" 1/2"MAXIMUM LENGTH20' 80'Liquid PropaneSemi-rigid Tubing 3/8" 1/2"M

2This well engineered, gas water heater has all the fea-tures a water heater should have:It operates on the principle of heating water instantaneously

3If you are using the AquaStar for combined space heating and potable water heating (seeschematic diagram below), all piping and other components conn

4GENERAL RULES TO FOLLOWFOR SAFE OPERATION1. You should follow these instructions when you installyour heater. In the United States: The installation

5Appliances located in confined spaces:) The confinedspace must be provided with two permanent openings,one commencing within 12 inches of the top and

6WARNINGNote: The burners of an instantaneous “on demand” waterheater such as the AquaStar are only on at the time thathot water is actually being use

7Fig. 3 - Water valve, top viewConnecting the pressure relief valve (PRV)A listed pressure relief valve supplied with the heater mustbe installed at t

8Fig. 6 - Water Flow Control KnobWhat is the best temperature setting? Because AquaStarwater heaters deliver endless hot water at the temperatureyou

9Fig. 8 - Pilot burner with air screen/ pilot orificeFig. 7 - Characteristic Pilot FlameMAINTENANCE AND SERVICEApproximately once a year, the AquaStar