Aquastar 125b Ng Manual
INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC. If the information in this manual is not followed exactly. AquaStar 125B LP and 125B NG Specifications. Bosch Aquastar 125b Ng Manual Bosch 125b lp installation & operating instructions manual, view and download bosch 125b lp installation & operating instructions manual.
Aquastar Chemicals
. INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND LIQUEFIED PETROLEUM GAS MODEL 125B LP and 125B NG (Flow Modulated) Suitable for water (potable) heating and space heating Intended for variable flow applications with steady cold water inlet temperatures. For preheated domestic hot water, install the 125 BS model. “on demand”. When a hot water faucet is opened, cold water flows through the coils of the heat exchanger in the Aquastar. This same flow opens the gas valve, and the burners are ignited by the pilot flame.
Bosch Aquastar 125b Ng Manual
The heat exchanger coils absorb the heat generated by the burners and trans- fer heat to the water. FRONT VIEW MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE INSTALLATIONS AQUASTAR MODELS 125B / 125BL / 125BS / 125X MODEL 125B / 125B LOW PRESSURE / 125B SOLAR / 125X TOP (A) FRONT (B) BACK SIDES. 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. Confirm that your Aquastar is venting properly when all these other appliances are running. See section on venting. WARNING Note: The burners of an instantaneous “on demand” water heater such as the AquaStar are only on at the time that hot water is actually being used, the venting stack is WALL STUDS therefore cold except for the short durations when hot water.
The flue connection for the AquaStar 125B is 5 inches. However, in Canada, for installations at high altitude (2000- 4500 feet above sea level) a six inch flue is required. A 5' by 6' flue adaptor must be affixed to the flue collar of the AquaStar with at least two screws.
Be certain there are no loose particles or dirt in the piping. Blow out or flush the lines before connecting to the AquaStar. A ball valve should be installed on the cold water feed line to facilitate servicing the heater. It just does not make sense to overheat water and then mix in cold to cool it off. You cannot run out of hot water with an AquaStar, so set the dial for the temperature you prefer.
Note: 105 ° F is the maximum recommended for a hot bath. Air screen filter TROUBLE SHOOTING Introduction The AquaStar 125 burners are activated by a water flow valve. Numerous water related problems can cause this water valve to malfunction such as: Insufficient water flow volume to activate the burners at its minimum flow requirement. When a hot water faucet is opened.
If there is a crossover in the plumbing, the necessary pressure drop in the AquaStar will be insufficient, or totally eliminated. A plumbing crossover can be caused by a bad washer at a single lever faucet or incorrect plumbing or a mixing valve in the line, etc. Note: This will increase the activation flow rate. Inlet water temperature is too high (as with solar preheated water) Note: Only the Model “S” AquaStar should be used if the inlet water is preheated.
Reduce inlet gas pressure WATER IS NOT HOT ENOUGH 1. Pilot assembly Burner manifold gas pressure test nipple Main gas burner Pilot gas tubing Gas valve Pressure tap screw location Diagram of AquaStar 125 B Gas control slide Piezo igniter Water valve Temperature adjustment selector Gas inlet gas pressure test nipple. INTERIOR COMPONENTS DIAGRAM AND PARTS LIST Fig. INTERIOR COMPONENTS DIAGRAM Cover Plastic collar Temperature adjustment knob Panel back Draft divertor Heat exchanger Hot water pipe Cold water pipe Heat exchanger washer Overheat sensor (ECO) Main burner assembly Main burner assembly Pilot burner assembly Pilot air screen Piezo electrode Pilot orifice “. Nominal Iron Pipe Size. MAXIMUM LENGTH Semi-rigid Tubing MAXIMUM LENGTH.
Flex tubing greatly reduces capacity and, therefore, is not recommended. Minimum Vent Size. and Height Minimum Diameter 5 inches. NOTE: Vent size must not be restricted. Installation must comply with national fuel gas code venting requirements for a 117,000 Btu Category I appliance and any applicable local codes.
. 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. 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”. 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. 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 device must be provided to reduce. 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.
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. 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.
Bosch Aquastar 125b Ng Service Manual
Contact your local dealer. 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). 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. 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. Gas regulator may be shut or damaged. Tighten the thermocouple nut snugly but not too tight. 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. 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.
10 - Diagram of AquaStar 125 BL Gas control slide Heat exchanger Piezo igniter Pilot assembly Location of pressure tap Burner manifold gas nipple pressure test nipple Water valve Pilot gas tubing Gas inlet gas pressure Main gas burner test nipple Gas valve. 11 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST.
11 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 125BL Cover ¤ 8 705 421 031 Cap cover ¤ 8 703 304 011 Water connection gasket ¤ 8 710 103 043 Draft divertor ¤ 8 705 505 354 Heat exchanger ¤ 8 705 406 235 Hot water pipe ¤. INSTALLATION CHECKLIST GAS LINE SIZE Natural Gas Nominal Iron Pipe Size. 1/2' 3/4' 1' 150' MAXIMUM LENGTH Liquid Propane Semi-rigid Tubing 1/2' 5/8' 3/4' 7/8' 150' MAXIMUM LENGTH RECOMMENDED. Flex tubing greatly reduces capacity and, therefore, is not recommended.
Minimum Vent Size. and Height Minimum Diameter Minimum Height.