Page 3 - Warning
6 720 608 263 Warning 3 FCC:This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired opera-t...
Page 4 - Appliance details; Features
6 720 608 263 4 Appliance details 2 Appliance details 2.1 Features Parts• Touch pad interface control• High power pre-mix compact burner with low NOx emissions • Modulating gas valve with constant gas to air ratio control • Modulating water valve for improved comfort and temperature control. Safety•...
Page 5 - Unpacking the 2400 E heater; Rating plate sticker; Remove front cover
6 720 608 263 Appliance details 5 • CO 2 level set from factory, see chapter 5.4. Dimensions • Depth (in): 8 ½” (220 mm) • Width (in): 15 ¾” (400 mm) • Height (in): 23 ½” (600 mm) • Weight: 47 pounds (21 kg). Gas types Natural Gas.LP Gas.Converting the gas type can only be done by a certifiedgas tec...
Page 7 - Dimensions and Minimum installation clearances; Dimensions; Minimum clearances
6 720 608 263 Appliance details 7 2.5 Dimensions and Minimum installation clearances Fig. 4 Dimensions 1 Cover 2 On/Off switch 3 Reset button 4 LCD display 5 Program button 6 Temperature buttons Fig. 5 Minimum clearances Model 2400 E TOP (A) 12” FRONT (B) 1” BACK 0” SIDES 1” FLOOR (C) 12” Table 1 Mi...
Page 8 - Installation instructions; Introduction
6 720 608 263 8 Installation instructions 3 Installation instructions 3.1 Introduction Please follow these instructions. Failure to followinstructions may result in: B Damage or injury. B Improper operation. B Loss of warranty. If you are unable to perform the tasks required to installthis heater pr...
Page 9 - Mounting the heater; Combustion air requirements; Single pipe installation
6 720 608 263 Installation instructions 9 Fig. 6 Mounting the heater 3.5 Combustion air requirements Twin pipe method: The 2400 E is designed as a sealed combustionappliance. It is recommended that the combustion airbe provided by a dedicated 3” or 4” pipe to the outside.The combustion air pipe may ...
Page 11 - Venting; a maximum of three 90° elbows are
6 720 608 263 Installation instructions 11 3.6 Venting 3.6.1 Vent material and specifications Establish vent clearances that comply with the vent manufacturer's specifications. In all cases follow local codes. Note : Listed thimbles or collars are necessary to pass through wall and ceiling partition...
Page 12 - to 4 inch increaser required when using 4 inch; Combustion air inlet connection; Fig. 11 Combustion air inlet connection; Table 4 Approved vent termination and condensate
6 720 608 263 12 Installation instructions may result in a hazardous condition. For specific questions concerning vent material, specifications, usage or installation, contact the vent manufacturer directly. Vent Safety System The 2400 E will shut down if inadequate exhaustventing is detected or a l...
Page 13 - bottom
6 720 608 263 Installation instructions 13 3.6.3 Condensate drain tube requirements Exhaust collar condensate drain installation (supplied with heater) B The condensate drain tube kit must be used for all installation types. Failure to properly install condensate drain will void the warranty. B When...
Page 14 - Fig. 14 Horizontal twin pipe termination; Vertical terminations; 6 Vertical vent terminations clearances; Interior masonry chimneys; Failure to install a
6 720 608 263 14 Installation instructions a 3" or 4" pipe from the outside. See Chapter 3.5 for more direction on combustion air. B To reduce pressure differentials between the exhaust and combustion air intake, it is recommended that both terminators exit on the same plane. See Fig. 14 for...
Page 16 - MANUFACTURER REQUIREMENTS - GAS
6 720 608 263 16 Installation instructions 1. Detailed instructions for the installation of the vent-ing system or the venting system components: and2. A complete parts list for the venting system design or venting system.(d) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED . Wh...
Page 17 - Description
6 720 608 263 Installation instructions 17 Recommended exhaust vent terminator clearances Fig. 17 * Subject to local codes and anticipated snow level ** Other equipment that operates with a mechanical air inlet may require greater distances, reference manufacturer's instructions NOTE: terminating ex...
Page 18 - 8 Horizontal side wall venting installation
6 720 608 263 18 Installation instructions 3.6.7 Exhaust vent configuration examples Supporting the exhaust vent system Fig. 18 Horizontal side wall venting installation (combustion air piping not shown) Note: Pitch venting up 1/4" per foot to termination and add additional condensate drain for ...
Page 19 - Gas piping & connections; GAS CONNECTIONS; GAS LINE SIZING
6 720 608 263 Installation instructions 19 3.7 Gas piping & connections Before connecting the gas supply, check the ratingplate on the right side of the heater to be sure that theheater is rated for the same gas to which it will beconnected.In the United States: The installation must conform wit...
Page 20 - FOR NATURAL GAS; corrugated) Tubing in Thousands of BTU per Hour of; FOR LP GAS
6 720 608 263 20 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 dropof 0.3” in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Fig. 22 Follow boxed num...
Page 21 - Measuring gas pressure; Connecting Manometer; Static; Operating; Gas Pressure Reading (see Chapter; Table 7; Table 8
6 720 608 263 Installation instructions 21 3.8 Measuring gas pressure Confirm proper gas pressure upon installation. Connecting Manometer B Shut off gas supply at installer supplied shutoff valve. B Remove front cover and locate inlet gas pressuremeasuring point (see Fig. 24). B Loosen screw inside ...
Page 22 - Water connections; If water flow or pressure is low, or heater does; HOT
6 720 608 263 22 Installation instructions 3.9 Water connections B When facing the heater, the ¾” cold inlet connection is on the bottom right and the hot connection is on the bottom left. Centrally locating the water heater is recommended to keep hot water distribution times even throughout the str...
Page 23 - Electrical connections; Fig. 27 Recirculation application; For
6 720 608 263 Installation instructions 23 3.10 Electrical connections The 2400 E requires an electrical power supply from a120VAC / 60Hz circuit (with a dedicated outlet) andmust be properly grounded.A means for switching of f the 120VAC power supplymust be provided.The heater is wired as shown in ...
Page 24 - Operation instructions; WHAT TO DO IF YOU SMELL GAS; Power; On
6 720 608 263 24 Operation instructions 4 Operation instructions Fig. 28 1 On/Off switch 2 Reset button 3 Program “ “ button 4 Increasing temperature selector 5 Decreasing temperature selector 6 LCD display 4.1 For your safety, read before oper-ating your water heater A. This appliance is equipped w...
Page 25 - Temperature selection; To select output water temperature:
6 720 608 263 Operation instructions 25 Off B To shut down the appliance move the on/off switch to the “off” position ( 0 ). 4.3 Temperature selection To select output water temperature: B Press buttons and in order to reach desired temperature. Fig. 30 If the outlet water temperature is set too hig...
Page 26 - Low flowing fixtures are the leading cause of
6 720 608 263 26 Operation instructions Setting the water temperature The desired temperature of the hot water can be adjusted on the front control panel of the heater.The 2400 E has an electronically controlled gas valve that modulates the burner input in response to both varying hotwater flow rate...
Page 27 - Fig. 32 Remote control; Operation; Programming “Program” function; button; Using “Program” function; Locked condition; Fig. 37 Locked condition
6 720 608 263 Operation instructions 27 4.4 Use of optional remote control accessory Fig. 32 Remote control The wireless remote control accessory and thetemperature selector buttons on the front of the waterheater operate identically. Contact your installer ordistributor to order the remote control ...
Page 28 - Maintenance and service; Annual maintenance
6 720 608 263 28 Maintenance and service 5 Maintenance and service The unit should be checked once a year by a gastechnician. If repairs are needed, the repairs should bedone by a gas technician 5.1 Annual maintenance (To remove front cover, see page 5.) Venting System • Venting system - inspect ins...
Page 30 - Fig. 40 Measuring port; Fig. 42 Adjusting P1 CO; Note; CO; LP Gas; levels increase when the cover is installed.; Table 9
6 720 608 263 30 Maintenance and service pipe (approx 1.5" inserted). Avoid air gaps betweenprobe and measuring port as it can alter readings. Fig. 40 Measuring port B While holding the Program (P) button, turn the ON/OFF switch to ON (I) position (see Fig. 41). As soonas ‘188’ flashes on the di...
Page 31 - Fig. 43 Adjusting P2 CO; Final Readings
6 720 608 263 Maintenance and service 31 Fig. 43 Adjusting P2 CO 2 level 3. Verify both P1 and P2 CO 2 readings are within the ranges specified in table 10. Repeat steps 1 and 2 as necesssary until CO 2 values are within the specified ranges. 4. Once CO 2 values are within the specified ranges, veri...
Page 32 - Control board diagnostics; Diagnostic menu
6 720 608 263 32 Maintenance and service 5.5 Control board diagnostics 1. Turn on/off switch on water heater to off (O) position. 2. Press and hold the program ( ) button while turning the on/off switch to the on (I) position. The display will cycle through a startup procedure including the software...
Page 33 - Troubleshooting
6 720 608 263 Troubleshooting 33 6 Troubleshooting 6.1 Introduction Many of the questions customers ask regardingoperation of this unit can be answered by following thetroubleshooting steps as outlined below. Visit our website at www.boschhotwater.com for more detailedtroubleshooting. For best resul...
Page 34 - Low water flow/pressure
6 720 608 263 34 Troubleshooting 7. Cold water is mixing into the hot water lines (plumbing crossover). A plumbing crossover can unintentionally mix cold water with the hot water leaving the heater. The end result is a cooler water temperature than desired. To check for a plumbing crossover, shut of...
Page 35 - Lack of adequate combustion air. Drawing
6 720 608 263 Troubleshooting 35 2. Improper venting. Venting that is unsealed, the wrong material, too big in diameter or too long in run willresult in unstable burner flames and noise. Ensureventing is correct and in accordance withspecifications in chapter 3.6. 3. Lack of adequate combustion air....
Page 36 - Error code diagnostics; Part numbers subject to change.; Display; Old style overheat cutoff fuse; * By installer or service technician only.
6 720 608 263 36 Troubleshooting 6.8 Error code diagnostics Part numbers subject to change. Display Cause Solution A2 Fault in the flue gas limiter (part# 8700400032). Note: Old style overheat cutoff fuse (8700400019) has been replaced with this new limiter. 1. Check for flue gas leakage around the ...
Page 37 - Possible defective control unit. Call Bosch Water; Table 6; on page
6 720 608 263 Troubleshooting 37 C1 Fan rotation too low on startup.(part# 8707204039) 1. Disconnect power supply cord. Check wire connections on back side of fan and the two large wire connectors on the control unit. Removal of lower access panel on control unit is necessary to access connectors.2....
Page 38 - and clear
6 720 608 263 38 Troubleshooting E1 Over-temperature detected by temperature sensor on hot water pipe.(part# 8700400015) 1. This water heater must be supplied with cold water for domestic hot water only. Do not recirculate water through this heater or supply with preheated water.2. Check that the ho...
Page 41 - Electrical diagram; Fig. 44 Electrical scheme
6 720 608 263 Electrical diagram 41 7 Electrical diagram Fig. 44 Electrical scheme 1 Intlet water temperature sensor 2 Ionization sensor 3 Water flow sensor 4 Flue gas limiter 5 Temperature limiter / ECO 6 Gas valve 7 Fan 8 Water valve 9 AC Plug 10 Ignition electrode 11 Display PCB 12 ON/OFF switch ...
Page 42 - Fig. 45 Functional scheme
6 720 608 263 42 2400 E Functional scheme 8 2400 E Functional scheme Fig. 45 Functional scheme
Page 43 - Interior components diagram and parts list; Interior components; Fig. 47 Appliance overview
6 720 608 263 Interior components diagram and parts list 43 9 Interior components diagram and parts list 9.1 Interior components Fig. 46 Components 1 Cover 2 On/Off switch 3 Reset button 4 LCD display 5 Program button 6 Temperature switches 7 Flue gas collector 8 Mixer 9 Heat exchanger 10 Observatio...
Page 44 - Components diagram; Fig. 48 Components Diagram
6 720 608 263 44 Interior components diagram and parts list 9.2 Components diagram Fig. 48 Components Diagram
Page 45 - Parts list; Item
6 720 608 263 Interior components diagram and parts list 45 9.3 Parts list Item Description Reference 1 Front cover 8 705 421 837 2 Shield 8 705 506 661 3 Heat exchanger 8 705 406 285 4 Heat exchanger top gasket 8 704 701 052 5 Clip 8 716 102 607 6 Heat exchanger bottom gasket 8 704 701 054 7 O-ring...
Page 46 - Protecting the environment; Packing
6 720 608 263 46 Protecting the environment 10 Protecting the environment Packing The packing box may be fully recycled as confirmed bythe recycling symbol . Components Many parts in the heater can be fully recycled in the endof the product life. Contact your city authorities forinformation about th...
Page 47 - Twelve Year Limited Warranty
6 720 608 263 Twelve Year Limited Warranty 47 11 Twelve Year Limited Warranty General Aquastar water heaters are warranted by theManufacturer (BOSCH) through BBT North America. BBT North America (BBTNA) will furnish a replacement heat exchanger and will furnish a replacement of anyother part which f...
Page 48 - Recycled paper; Waitsfield, VT all rights reserved; Estrada de Cacia; BBT; NORTH AMERICA
Recycled paper © 2007 BBT NORTH AMERICA, Waitsfield, VT all rights reserved Replacement Parts available from: BBT Termotecnologia Portugal S.A. Estrada de Cacia 3801 - 856 Aveiro - PORTUGAL BBT NORTH AMERICA Bosch Group Bosch Water Heating340 Mad River ParkWaitsfield, VT 05673Phone 800-642-3111Fax (...
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