Installation Manual

ManualsBrandsBosch ManualsCooling & Air QualityAquastar 125BO Natural Gas Outdoor Tankless Water Heater

MODEL 125BO LP and 125BO NG - OUTDOOR MODEL

For exterior use only

Piezo Ignition

Suitable for heating potable water only

Not approved for space heating purposes

AQ 125 BO NG - Natural Gas

AQ 125 BO LP - Liquefied Petroleum (LP) Gas

8 716 473 147 US (05.12) AL

Warning: If the information in this manual is not

followed exactly, a fire or explosion may result

causing property damage, personal injury or death.

Do not store or use gasoline or other flammable

vapor and liquids in the vicinity of this or any other

appliance.

Improper installation, adjustment, alteration, service

or maintenance can cause injury or property

damage. Refer to this manual. For assistance or

additional information consult a qualified installer,

service agency or the gas supplier.

In the Commonwealth of Massachusetts this

product is approved only for seasonal use.

Installation must be performed by a licensed

plumber or gas fitter.

Upon completion of the installation, these

instructions should be handed to the user of the

appliance for future reference.

What to do if you smell gas

• Close gas valve.

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any

phone in your building.

• If you cannot reach your gas supplier, call the fire

department.

• Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier’s instructions

•

Installation and service must be performed by a

qualified installer, service agency or the gas supplier.

Summary of content (24 pages)

PAGE 1
MODEL 125BO LP and 125BO NG - OUTDOOR MODEL For exterior use only Piezo Ignition Suitable for heating potable water only Not approved for space heating purposes 8 716 473 147 US (05.12) AL AQ 125 BO NG - Natural Gas AQ 125 BO LP - Liquefied Petroleum (LP) Gas Warning: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
PAGE 2
Index Index 1 Warning 2 2 2.1 2.2 2.3 2.4 2.5 Appliance details Features AQ125 BO specifications (Technical data) Unpacking the AQ-125-BO heater General rules to follow for safe operation Dimensions and installation clearances 4 4 4 5 5 6 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.
PAGE 3
Warning What to do if you smell gas • Close gas valve. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. • Installation and service must be performed by a qualified installer, service agency or the gas supplier.
PAGE 4
Appliance details 2 Appliance details 2.1 Features • Burner output proportional to hot water flow demand for maximum energy efficiency • Stainless steel burners with stabilized blue flame • Built-in corrosion resistant draft diverter • Cold water connection (inches) - ½” • Water valve material: Polymer (PPS) (Polypropylene Sulfid) • Minimum water flow: 0.5 gallon/minute (1.9 l/m) • Minimum recommended water pressure: 30 PSI (2.
PAGE 5
Appliance details 2.3 Unpacking the AQ-125-BO heater This heater is packed securely. Before installing the unit, be certain you have the correct heater for your type of Gas - Propane or Natural Gas. Identification labels are found on the shipping box, and on the rating plate which is located on the right side panel of the cover. The box includes: • Pressure relief valve • Heat shield • Mounting screws 2.4 General rules to follow for safe operation B 1.
PAGE 6
Appliance details 2.5 Dimensions and installation clearances Fig. 3 Dimensions Fig. 4 Minimum clearances Model AQ125 BO TOP (A) 3 ft. FRONT (B) 4 ft. BACK 0” SIDES 4 ft. BOTTOM (C) 1 ft.
PAGE 7
Installation instructions 3 Installation instructions 3.1 Introduction Please follow these instructions. Failure to follow instructions may result in: B Damage or injury. B Improper operation. B Loss of warranty. Danger: Flue gases will be released through the vent cap. Flue gas is very hot and contains carbon monoxide. The heater cannot be installed indoors. To prevent risk of fire and poisoning by carbon monoxide, assure all clearances indicated in manual.
PAGE 8
Installation instructions 3.3 Heater placement and clearances 3.4 The AQ125 BO is design certified for installation directly on a combustible wall. (see 3.4 Mounting installation). For installation on vinyl siding see Fig. 7. Keep the area below the heater free of combustible material. Minimum clearances If the appliance is installed under an overhang, there must be a 36” clearance from the top of the appliance and the mounting area must be open in front and on the sides of the appliance.
PAGE 9
Installation instructions Fig. 7 B Secure heater to wall using enclosed mounting screws. Use mounting template for proper screw location. B Locate head of screw in the key hole of the top mounting bracket. Vent Safety System The AQ125 BO will shut down if the intake or exhaust louvers on the vent cap are blocked for any reason; see troubleshooting section on page 17.
PAGE 10
Installation instructions 3.5 Gas piping & connections Before connecting the gas supply, check the rating plate on the right side of the heater 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 to CGA B149 INSTALLATION CODES and/or local installation codes.
PAGE 11
Installation instructions FOR NATURAL GAS Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Copper tubing is prohibited for use with Natural Gas in the Commonwealth of Massachusetts and not recommended elsewhere. Follow boxed numbers for piping just one AQ125 BO (example: ¾” B.I. Natural Gas pipe for 20 ft (6.1m).
PAGE 12
Installation instructions 3.6 Measuring gas pressure Connecting manometer B Shut off gas. B Remove front cover and locate inlet gas pressure measuring point on the right side of the gas valve. B Loosen screw from test point on the left side of gas valve and connect manometer tube on test point. Static pressure test B Turn gas supply back on. B Operate all other gas appliances on same gas piping system at maximum output. B Record static gas pressure reading on back page of manual.
PAGE 13
Installation instructions 3.8 Electrical connections Warning: Confirm that the water heater is appropriately grounded and that the installation meets all electrical codes. Outdoor electrical outlets have special requirements. Warning: For safety reasons, disconnect the power supply to the heater before any service or testing is performed. Warning: This heater must be electrically grounded in accordance with the most recent edition of the National Electrical Code. NFPA 70.
PAGE 14
Operation instructions 4 Operation instructions 4.1 For your safety read before operating your water heater Warning: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance employs a piezo-igniter to light the pilot burner. When lighting the pilot, follow these instructions exactly. B. What to do if you smell gas. WHAT TO DO IF YOU SMELL GAS B Do not try to light any appliance.
PAGE 15
Operation instructions GAS CONTROL SLIDE TEMPERATURE ADJUSTMENT KNOB Fig. 10 Temperature Adjustment Controls Temperature adjustment knob The temperature adjustment knob on the front bottom of the heater (see Fig. 10) adjusts temperature by adjusting flow capacity. See table 4 for details. Knob position clockwise counterclockwise 90°F 45°F Activation rate 0.5 GPM 1.1 GPM Max flow rate 2.0 GPM 3.
PAGE 16
Maintenance and service 5 Maintenance and service 5.1 Maintenance intervals The 125 BO requires periodic maintenance. The below time maintenance intervals should kept the unit operating for many years. Every year B Inspect inlet water filter screen ( 5.2) B Inspect pilot assembly and flame ( 5.3) B Inspect burner assembly ( 5.4) Every 2 years B Lubricate and clean water valve ( 5.2) Every 3 to 5 years B Rebuild water valve ( 5.2) B Clean pilot assembly and clean or replace orifice ( 5.3) 5.
PAGE 17
Troubleshooting 6 Troubleshooting 6.1 Introduction Many of the questions customers ask regarding operation of this unit can be answered by following the troubleshooting steps as outlined below. Visit our web site at www.boschhotwater.com for more detailed troubleshooting. For best results, perform each step before proceeding to the next. The suggested solutions may require that the cover be taken off. (See chapter 3.4). 6.2 Pilot will not light • 1.
PAGE 18
Troubleshooting • 5. Service water valve See chapter 5.2 for intervals and instructions. • 6. ECO (overheat sensor) tripped due to overheating re-ignite the appliance 10 minutes later. If it happens again, contact your service person. 6.6 Water is too hot • 1. Check gas type on right side panel rating plate. NG is a natural gas unit and LP is for liquid propane. • 2. Since the unit does not measure incoming water temperature, the output water may be warmer in the summer than in the winter.
PAGE 19
Interior components and diagram parts list 7 Interior components and diagram parts list 7.1 Interior components 1 3 2 4 6 5 7 8 9 10 11 Fig.
PAGE 20
Interior components and diagram parts list 7.2 Components diagram Fig.
PAGE 21
Interior components and diagram parts list 7.
PAGE 22
Protecting the environment 8 Protecting the environment Packing The packing box may be fully recycled as confirmed by the recycling symbol . Components Many parts in the heater can be fully recycled in the end of the product life. Contact your city authorities for information about the disposal of recyclable products. Saving water resources: B Make sure you close all the taps after any use. Avoid leaving the taps dripping. Repair any leaking tap. B Define the temperature you want.
PAGE 23
Twelve Year Limited Warranty 9 Twelve Year Limited Warranty General Aquastar water heaters are warranted by the Manufacturer (BOSCH) through BBT North America. BBT North America (BBTNA) will furnish a replacement heat exchanger and will furnish a replacement of any other part which fails in normal use and service within the applicable periods specified below, in accordance with the terms of this warranty. The BBTNA replacement will be warranted for the unexpired portion of the original warranty.
PAGE 24
Installer Checklist, to be performed by installer upon installation Serial Number ___ ___ ___ ___ ___ ___ ___ ___ (8 digit serial number is located on rating plate on right side panel) Gas Pressure Reading* Static__________ Operating__________ Building Water Pressure __________ Range if on Well system __________ Average Winter Temperature __________ Average Summer Temperature __________ Installing Company _____________________________________________ Installer name ____________________________