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This well engineered, gas water heater has all the fea- AquaStar 125B LP and 125B NG Specifications tures a water heater should have: It operates on the principle of heating water instantaneously “on demand”. When a hot water faucet is opened, cold Gas Input max.: 117,000 Btu/hr water flows through the coils of the heat exchanger in the min.: 28,000 Btu/hr Aquastar. This same flow opens the gas valve, and the burners are ignited by the pilot flame. The heat exchanger Water Connection 1/2” Thre
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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 treatment to prevent corrosion and freezing must not be introduced into the system, and (c) if the space heating requires water temperatures higher than those required for do- mestic, potable water, a mixing valve or other similar devi
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4. You must vent your heater. See section on Vent Pipe Do not obstruct the flow of combustion and ventilation Connections, Page 5. air to the appliance. If installed near a clothes dryer it is very important that the dryer be properly vented. Failure 5. The appliance must be disconnected from the gas to properly vent a dryer could result in a gradual supply piping system during any pressure testing at accumulation of lint on the water heater fin coils and pressures in excess of 1/2 Psig (3.5 kP
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The incandescent particle tray (shipped loose in the car- CLEARANCES ton with the water heater) must be attached at the bottom of the water heater front cover at the time of installation. The Aquastar 125 B is design certified for installation on a Use the screws provided. See figure 2 combustible wall and for installation in an alcove with the minimum clearances to combustible and non -combustible construction listed below A. Top 12 inches ( 305 mm) B. Front Open C. Back 0 inches D. Sides 4 i
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The flue connection for the AquaStar 125B is 5 inches. (660 meters) above sea level. On appliances being However, in Canada, for installations at high altitude (2000- installed above 2000 ft (660 meters) elevation, the inlet 4500 feet above sea level) a six inch flue is required. A 5" gas pressure should be set at installation to the value by 6" flue adaptor must be affixed to the flue collar of the shown below. AquaStar with at least two screws. See figure 3 NOTE: The gas pressures specified b
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LIGHTING INSTRUCTIONS 1. STOP! Read the safety information above on this plate. 2. The Gas valve must be turned off by sliding the gas valve button to the far left under the OFF ( ) mark. 3. Wait five (5) minutes to clear out any gas. If you smell gas, STOP! Follow “B” in the safety information above on this plate. If you don’t smell gas, go to next step. Fig. 8 - Water Flow Control Knob 4. The pilot burner is located behind the peephole in the front center of the jacket directly below this i
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the pilot burner and or the pilot burner orifice may need to Main Burner Flames: The main burner flames should be be cleaned, the orifice may need to be replaced, and or blue, with a more intense blue cone in the center core. the air screen may need cleaning. The pilot flame should Yellow flames could be a sign of wrong size gas orifices or envelop approximately 10 mm (3/8") of the tip of the dirty burners, or a blockage on the heat exchangers fins. thermocouple. If it is too small, the pilot bu
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Although the filters can lengthen the cleaning intervals, 6. Faulty thermocouple (part #8747202083) or they can never completely prevent such clogging. In electromagnet ) Unless these 2 parts are at least 8 consequence the gas jet issuing from the pilot orifice is to 10 years old, it is very unlikely that they are faulty. reduced and or the air mixture is reduced. The pilot flame Before testing, reconfirm that #2 is absolutely is weak and thus can no longer heat the thermocouple correct, and tha
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7. Water valve parts may be dirty or components 3. Btu input is too low due to insufficient gas pressure damaged. It is extremely important for a tankless Water valve and component parts must be totally free of instantaneous water heater to have the right size dirt. First check that the venturi is free of dirt particles. In gas line to obtain the correct gas pressure hard water areas, mineral deposits can eventually (3 to 5 See specifications on page 2. Unlike storage tank water years in hard wa
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Fig. 11 - Diagram of AquaStar 125 B 1 3 2 4 5 6 7 9 8 10 11 12 1. Heat exchanger 8. Gas control slide 2. Pilot assembly 9. Piezo igniter 3. Burner manifold gas 10. Water valve pressure test nipple 11. Temperature adjustment 4. Main gas burner selector 5. Pilot gas tubing 12. Gas inlet gas pressure 6. Gas valve test nipple 7. Pressure tap screw location 13
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Fig. 12 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 125B 1 Cover ¤ 8 705 421 025 2 Plastic collar ¤ 8 700 403 008 3 Temperature adjustment knob ¤ 8 702 000 111 4 Panel back ¤ 8 705 402 164 5 Draft divertor ¤ 8 705 505 354 6 Heat exchanger ¤ 8 705 406 235 7 Hot water pipe ¤ 8 700 705 556 8 Cold water pipe ¤ 8 700 705 294 9 Heat exchanger washer ¤ 8 710 103 045 10 Overheat sensor (ECO) ¤ 8 707 206 040 11 Main burner assembly LPG 8 708 120 296 Main burner assembly NG 8 708 120 298 12 Pilot burner as
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