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INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125B LPL and 125B NGL (Non-Modulated)
Suitable for heating potable water
Certified for space heating in combination with potable water only
Not certified for space heating only. Intended for either recirculation to storage or cold water inlet flow that
is non-varying. For variable flow, install the 125 B or the 125 X model.
WARNING
If the information in th
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This well engineered, gas water heater has been AquaStar 125B LPL and 125B NGL Specifications specially designed to operate as a circulating water heater. Gas Input max.: 117,000 Btu/hr min.: 60,000 Btu/hr FEATURES Water Connection 1/2” Thread fitting - High Quality Materials for Long Working Life. H x W x D 29 3/4” x 18 1/4” x 8 3/4" - Copper heating coils for endless supply of hot water. Vent 5” - Safety thermocouple at pilot burner. Gas Connection 1/2” NPT thread - Automatic overheating pr
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FRONT VIEW SIDE VIEW MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS MODEL 125BL TOP (A) 12" FRONT (B) 4" BACK 0" SIDES 4" FLOOR (C) 12" * FLUE DIAMETER 5" * Some local codes require 18” in garage installations AQUASTAR MODEL 125BL 3 D861_059
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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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7. Correct gas pressure is critical for the optimum WARNING: The water in this water heater is cold operation of this heater (see specifications on page 2). Gas and always remains cold except for the times that hot piping must be sized to provide the required pressure at water is being used DO NOT INSTALL IN AN AREA the maximum output of the heater, while all the other gas WHERE IT COULD FREEZE. appliances are in operation. Check with your local gas This heater is neither designed for nor appr
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dilution of flue gases. which, if mounted directly to a brittle, friable board, such Appliances located in confined spaces:) The confined space as plasterboard, can cause failure of mounting. must be provided with two permanent openings, one In earthquake-prone zones, CEC recommends that commencing within 12 inches of the top and one installers use a large washer and lag screw through the commencing within 12 inches of the bottom of the existing holes used to hang the heater to affix the upper e
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Code if vent will have elbows or share venting with another appliance. 5” X 6” ADAPTOR The vent connector should have as much vertical rise USED ON HIGH ALTITUDE as possible (minimum 12”) before any horizontal run. Optional powervent available in order to sidewall vent. Contact your local dealer. The appliance must be located as close as practicable to a chimney or vent. The vent pipe sections must be secured to each other with sheet metal screws. Keep in mind the minimum clearance from the top
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NOTE: The gas pressures specified below refer to NOTE: Do not apply soap solution to pilot filter screen or pressures taken at the test pressure nipple on the gas pilot orifice area. If you have a leak, shut off the gas. After inlet pipe just above the regulator (See Fig 4). These verifying that required gaskets are in place, tighten readings should be taken while the heater is operating appropriate fittings to stop leak. Turn the gas on and check at full input — i.e. with the gas control posit
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If control button(s) are jammed, close the gas supply and Connecting the pressure relief valve (PRV) call a qualified service technician. Attempted forceful repair A listed pressure relief valve supplied with the heater must may result in a fire or explosion. be installed at the time of installation. No valve is to be D. Do not use this appliance if any part has been under placed between the PRV and the heater. No reducing water. coupling or other restriction may be installed in the discharge li
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toward you and lift up and out. THE FOLLOWING To access the pilot orifice, remove 2 screws holding pilot OPERATIONS SHOULD BE PERFORMED BY A assembly in place. Then loosen compression fittings to QUALIFIED SERVICE PERSON: expose pilot orifice. Vent System: Should be checked annually. Clean and repair as needed. Water Valve (Part # 8707002478): The water valve on this heater should be serviced periodically. Lubricate component AIR SCREEN #25 on page 14 with a small amount of silicon, faucet or l
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C. Gas regulator may be shut or damaged. Tighten the thermocouple nut snugly but not too tight. 2. In-line AquaStar gas regulator jammed (usually on 4. Poor circuit connections at the ECO. (Energy Cut- LP gas) Off overheat protection) Replace or unjam the regulator. Note: The regulator Oxidation or looseness of the ECO terminal connections furnished with the heater is designed for low gas pressure. can result in millivolt current loss through the thermocouple Excessive pressure will lock it up (
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system preventing the pressure drop in the Aquastar (i.e. temperature relay for the primary circulator pump is possibly cold water is entering the water heater from both sides and set too high. the burners will not come on). To confirm there is no crossover in the plumbing, shut off WATER IS NOT HOT ENOUGH the cold water supply to the AquaStar. Open your hot water taps. 1. Water flow rate is too high. There should not be any water flowing. If there is water Decrease the flow rate. flowing, there
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Fig. 10 - Diagram of AquaStar 125 BL 1 3 2 5 4 6 8 7 9 10 11 7. Gas control slide 1. Heat exchanger 8. Piezo igniter 2. Pilot assembly 9. Location of pressure tap 3. Burner manifold gas nipple pressure test nipple 10. Water valve 4. Pilot gas tubing 11. Gas inlet gas pressure 5. Main gas burner test nipple 6. Gas valve 13
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Fig. 11 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 14
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Fig. 11 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 125BL 1 Cover ¤ 8 705 421 031 2 Cap cover ¤ 8 703 304 011 3 Water connection gasket ¤ 8 710 103 043 4 Draft divertor ¤ 8 705 505 354 5 Heat exchanger ¤ 8 705 406 235 6 Hot water pipe ¤ 8 700 705 431 7 Cold water pipe ¤ 8 700 705 294 8 Heat exchanger washer ¤ 8 710 103 045 9 Overheat sensor (ECO) ¤ 8 707 206 017 10 Main burner assembly LPG 8 708 120 296 Main burner assembly NG 8 708 120 298 11 Pilot burner assembly ¤ 8 708 105 337 11a Pilot filte
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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
