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INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125HX LP and 125HX NG
(Flow Modulated with Electronic Ignition)
Suitable for heating potable water only
Not approved for space heating purposes
Intended for variable flow applications with steady cold water inlet temperatures.
WARNING
If the information in this manual is not followed
exactly, a fire or explosion may result causing property
damage, personal
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Principle of Operation: AquaStar 125HX LP and 125HX NG Specifications When a hot water faucet is opened, the water flow through the heater causes the gas valve to open. At the same time the hydro-generator activates the electronics which Gas Input max.: 117,000 Btu/hr sends a spark to the pilot. The flame sensor confirms the min.: 28,000 Btu/hr pilot has been lighted and allows the first two burners to come on. The flame sensor confirms correct activation and Water Connection ½” Thread fitting
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FRONT VIEW SIDE VIEW MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS MODEL 125 HX TOP (A) 12" FRONT (B) 4" BACK 0" SIDES 4" FLOOR (C) 12" * VENT DIAMETER 5" * Some local codes require 18” in garage installations AQUASTAR MODEL 125HX 6 720 606 804 (02.10) 3
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The heater may still operate even when improperly vented. GENERAL RULES TO FOLLOW It will, however, be less efficient and could eventually damage FOR SAFE OPERATION the heater. It could even result in human sickness or death due to oxygen deprivation and carbon monoxide poisoning. 1. You should follow these instructions when you install Follow the guidelines below: your heater. In the United States: The installation must conform with local codes or, in the absence of local codes, 1. Place your
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This product is not approved for manufactured homes Louvers, grills and screens have a blocking effect. If the (mobile home), recreational vehicles (RV) or boats. effective free area is not known, increase the sizes of your Reference ANSI Z21.10.3. openings by 75% if your louvers are wood and by 30% if This product is neither designed or approved for your louvers are metal. Refer to the National Fuel Gas Code for complete information. In buildings of tight construction outside installations. all
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at least 1/4 inch for every foot of its horizontal length. Keep the horizontal section short and avoid too many elbows. WALL STUDS To check the draft: Close all doors and windows to the outside. 13 ¼” Turn on all appliances that force air out of the building. SUPPORT BOARD These include all exhaust/ventilation fans, furnaces, clothes dryers, wood burning stoves, etc. Open all doors between the AquaStar and these other appliances. With the control knob set fully clockwise and strong hot 1” X 4” w
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GAS CONNECTIONS and Gas Regulator GAS LINE SIZING NOTE: The Aquastar 125 HX is supplied with a gas -It is strongly recommended that the Natural Gas pipe pressure regulator that must be installed on the heater be Black Iron pipe the entire distance from the outside before attaching the gas supply line. See figure 4. meter to the inlet of the Aquastar regulator. 1/2” Black Failure to install the gas regulator as shown in figure Iron pipe up to 10 feet, 3/4” Black Iron pipe up to 40 4 will be a vi
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GAS PIPING, CONNECTIONS and Gas Regulator Before connecting the gas supply, check the rating plate on the right side of the front cover to be sure that the heater is rated for the same gas to which it will be connected. In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54. In Canada: The Installation should conform with CGA B149 INSTALLATION CODES and /or local installation codes. GAS LINE SIZING Th
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The discharge line must be installed such that it allows WATER CONNECTIONS complete drainage of both the PRV and the line. When facing the heater, the cold water inlet is on your right The location of the PRV must be readily accessible for and the hot water outlet is on your left. servicing or replacement, and be mounted as close to the Although water piping throughout your structure may be water heater as possible. See Fig 7. To install the PRV, a other than copper, we recommend that copper pip
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LIGHTING AND OPERATING INSTRUCTIONS 1. STOP! Read the safety information above on this label. 2. The gas valve must be shut off by putting the ON/OFF switch to position “ ”. Wait five (5) minutes to clear out any gas. If you smell gas, STOP! Follow “B” in the safety information above. If you do not smell gas, go to Fig. 8 - Temperature Adjustment Knob the next step. The position you select on the temperature adjustment knob 3. This water heater is equipped with a safety pilot burner will depend
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To clean the pilot burner and/ or the pilot orifice : Turn MAINTENANCE AND SERVICE off the gas to the unit. Set the On/Off switch to Off (position REVIEW MAINTENANCE TABLE ON THE BACK OF THIS ). Remove the cover of the heater. To do so, pull off MANUAL. the temperature adjustment knob and unscrew and remove Approximately once a year, the AquaStar should be checked the plastic collar. Pull main cover out toward you and lift up and cleaned. To remove the front cover, first remove the and out. The
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Problems are stated in upper case, bold face. Most common SPARK APPEARS AT PILOT WHEN HOT WATER TAP causes for the problems follow in order of likelihood. The TURNED ON, BUT PILOT AND BURNERS WILL NOT suggested solutions require that the cover be taken off. To IGNITE do this, remove incandescent particle tray, pull off the temperature adjustment knob and unscrew and remove the 1. Air in the Gas Line plastic collar. Pull main cover out toward you and lift up Normally this is a problem at time of
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PILOT LIGHTS BUT BURNERS WILL NOT COME ON 5. Flue gas safety device tripped Ventilate the room and re-ignite the appliance 10 minutes 1. Confirm water valve assembly is working properly. later. If it happens again, contact your service person or Controlled Energy.. 2. Confirm the flame sensor is in its proper position. WATER IS TOO HOT 3. Confirm the burner electrovalve switch is functioning properly. 1. Temperature Selection too high Call CEC Turn the temperature adjustment knob counter-clockwi
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HOT WATER TEMPERATURE FLUCTUATES 1. Unbalanced pressure in waterlines The added restriction caused by the Aquastar in the hot water system can result in uneven pressures between the cold and the hot. In such cases when mixing cold water at the tap, the lower hot water pressure may be overpowered by a much higher cold water pressure, which may cause the Aquastar burners to shut down. Make sure faucet aerators or shower heads are free of minerals. Do not add any flow restrictor to the shower head.
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Fig. 14 - Diagram of AquaStar 125 HX 1 3 2 4 5 6 7 8 10 9 12 11 6 720 606 804-10.1AL 1. Heat exchanger 7. on/off switch 2. Pilot assembly 8. LED operation indicator 3. Burner manifold gas 9. Water valve pressure test nipple 10. Temperature adjustment selector 4. Main gas burner 11. Gas inlet gas pressure test nipple 5. Pilot gas tubing 12. Hose 6. LED failure indicator 6 720 606 804 (02.10) 15
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Fig. 15 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 16 6 720 606 804 (02.10)
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Fig. 15 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 125HX 1 Cover 8 705 421 752 2 Temperature adjustment knob 8 702 000 111 3 Temperature adjustment collar 8 700 403 008 4 Draft diverter 8 705 505 354 5 Heat exchanger 8 705 406 235 7 Main burner 8 708 120 298 NG 7 Main burner 8 708 120 296 LP 8 Burner assembly washer 8 710 103 060 9 Throttle disc 8 700 100 174 LP 10 Pilot burner 8 708 105 491 LP 10 Pilot burner 8 708 105 337 NG 11 Piezo electrode 8 718 107 067 12 Pilot orifice 8 708 200 069 NG 12
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18 6 720 606 804 (02.10)
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6 720 606 804 (02.10) 19
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INSTALLATION CHECKLIST GAS LINE SIZE Natural Gas Nominal Iron Pipe Size* 1/2" 3/4" 1" MAXIMUM LENGTH 10' 40' 150' Liquid Propane Semi-rigid Tubing 1/2" 5/8" 3/4" 7/8" NOT MAXIMUM LENGTH 20' 60' 150' RECOMMENDED * Flex tubing greatly reduces capacity and, therefore, is not recommended. Minimum Vent Size* and Height Minimum Diameter Minimum Height** 5 inches 6 feet * NOTE: Vent size must not be restricted. Installation must comply with national fuel gas code venting requirements for a 117,000 Bt
