Bosch C1050ES Installation Manual Download Page 2

Page: 2 / 72

6 720 646 812

Index

Warning

Appliance details

2.1

Features

2.2

Specifications (Technical data)

2.3

Unpacking the heater

2.4

General rules to follow for safe operation

2.5

Dimensions and minimum
installation clearances

Installation instructions

3.1

Specialized tools

3.2

Introduction

3.3

Venting

3.4

Combustion air requirements

3.5

Proper location for installing your heater

3.6

Heater placement and clearances

3.7

Mounting installation

3.8

Gas piping & connections

3.9

Water connections

3.10 Water quality

3.11 Filling the condensate trap

3.12 Domestic hot water recirculation

3.13 Space heating applications

3.14 Measuring gas pressure

Electrical connections

4.1

Electrical power supply

4.2

Position of the fuses in control unit

Operation instructions

5.1

Description LCD Display

5.2

For your safety read before operating
your water heater

5.3

Power

5.4

Temperature selection

5.5

Use of optional remote control accessory
(part no. TSTAT2)

5.6

Operation

5.7

Reset button

5.8

Program button

5.9

Locked condition

Maintenance and service

6.1

Annual maintenance

6.2

Winterizing for seasonal use

6.3

Mineral scale build-up

6.4

Condensing heat exchanger unit

6.5

Adjusting CO2

6.6

Program values

6.7

Control board diagnostics

Troubleshooting

7.1

Introduction

7.2

Burner does not ignite when hot
water is turned ON

7.3

Water is too hot

7.4

Water is not hot enough

7.5

Low water flow/pressure

7.6

Hot water temperature fluctuates at tap

7.7

Noisy burner/heater during operation

Problem solving

8.1

Error code diagnostics

Electrical diagram

Sensor resistance charts

Functional scheme

Interior components diagram
and parts list

12.1 Interior components

12.2 Components diagram

Protecting the environment

LIFETIME LIMITED WARRANTY
FOR BOSCH PRO TANKLESS
WATER HEATERS

Notes

Summary of Contents for C1050ES

Page 1: ...operty 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 must be installed 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...

Page 2: ... read before operating your water heater 38 5 3 Power 38 5 4 Temperature selection 38 5 5 Use of optional remote control accessory part no TSTAT2 39 5 6 Operation 39 5 7 Reset button 39 5 8 Program button 40 5 9 Locked condition 40 6 Maintenance and service 41 6 1 Annual maintenance 41 6 2 Winterizing for seasonal use 41 6 3 Mineral scale build up 42 6 4 Condensing heat exchanger unit 42 6 5 Adjus...

Page 3: ...lure to do so could result in severe personal injury or death Warning The heater must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0 5 psig Warning The appliance should be located in an area where leakage of the heater or connections will not result in damage to the area adjacent to the appliance or to lower fl...

Page 4: ...eater is used in a space heating application all piping and components connected to the water heater must be suitable for use with potable water Warning Toxic chemicals such such as those used for boiler treatment shall not be introduced into the potable water used for space heating Warning A water heater which will be used to supply potable water shall not be connected to any heating system or co...

Page 5: ...lter part 8 703 305 356 Concentric termination kit 196016 Exhaust Intake bird screen L2594 Condensate drain tee 196061 included with Con centric termination kit Pipe Cover PTPCES High temperature kit 7736500074 Recess box kit 7736500043 Pressure relief valve FWL 2 2 2 Specifications Technical data Approved in US Canada Capacity Maximum flow rate 7 15 GPM 27 l min at a 45 F 25 C rise Maximum output...

Page 6: ...ch is located on the right side panel of the cover Fig 2 Rating plate A Serial number B Type of gas The box includes C 950 ES Bracket for wall hanging the heater Exhaust vent adaptor with 4 screws and gasket provided Combustion air inlet adaptor with 3 screws and gas ket provided Installation manual manual can be downloaded at www bosch climate us Product registration card Energy Guide label Pleas...

Page 7: ...located on bottom rear of cover see Fig 3 Fig 3 Loosen the two screws B Lift front cover panel upward and remove Fig 4 Remove the front cover To remove combustion cover service only B Open the four clips and remove the combustion cover see Fig 5 Fig 5 Remove the combustion cover 6720644956 11 1V ...

Page 8: ...r See chapter 3 3 page 10 on VENTING B 5 The appliance and its gas connection must be leak tested before placing the appliance in operation The appliance must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve not supplied with heater during any pressure testing at pressures in excess of Psig 3 5 kPa B 6 Keep water heater area clear and free from combu...

Page 9: ...button 2 Reset button 3 Program key 4 Power ON or stand by LED 5 LCD display 6 Up button 7 Down button Fig 7 Minimum clearances Note For servicing access a 2ft clearance is recommended to the front cover 6720608000 03 2AL 6 4 Model C 950 ES TOP A 12 FRONT B 1 BACK 0 SIDES 1 FLOOR C 12 Table 1 Minimum clearances ...

Page 10: ...rdous condition such as explosion or carbon monoxide poisoning could result Bosch Thermotechnology Corp is not responsible for improperly installed appliances i Common installation practice is to first determine the venting combustion air point of termination then design the piping layout back to the heater Warning B Do not reduce the exhaust or combustion air vent pipe sizes B Do not common vent ...

Page 11: ... vent pipe The minimum combustion air pipe length is one 90 elbow Description Length Kit part no and quantity 196016 3 In Rain Cap N A 1 4 In Diameter SDR 26 Pipe 24 In long 1 3 In Y Concentric Fitting N A 1 2 In Diameter SDR 26 Pipe 37 1 8 in long 1 3 In Condensate drain Tee N A 1 1 5 In Condensate drain bushing N A 1 Table 3 Concentric vent part breakdown 6720608836 27 2V 3 76mm 3 76mm INTAKE EX...

Page 12: ...er the exhaust or combus tion air piping 3 Venting Maximum allowable Exhaust pipe length Maximum allowable Combustion air pipe length Elbow Equivalency 90 45 Twin pipe system 31ft 31ft 5 ft 3 ft Concen tric system 23ft 23ft 5 ft 3 ft Table 5 Maximum Allowable Exhaust and Combustion Air Lengths for 3 venting 4 Venting Maximum allowable Exhaust pipe length Maximum allowable Combustion air pipe lengt...

Page 13: ... example Max length 23 90 elbow reduction 10 sub total 13 45 elbow reduction 3 Total 10 Table 11 i For this example the maximum allowable combustion air pipe length is 10 feet System used Twin pipe Number of 90 elbows needed 1 Number of 45 elbows needed 2 Table 12 Calculation of example Max length 63 90 elbow reduction 2 5 sub total 61 5 45 elbow reduction 3 Total 58 5 Table 13 i For this example ...

Page 14: ...ventilated soffit F Clearance to outside corner G Clearance to inside corner H Clearance to each side of center line extended above meter regulator assembly 36 in within a height 15 feet above meter regulator assembly I Clearance to service regulator vent outlet 36 in J Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other application 36 in 12 in K Clear...

Page 15: ...ntilated soffit F Clearance to outside corner G Clearance to inside corner H Clearance to each side of center line extended above meter regulator assembly 36 in within a height 15 feet above meter regulator assembly I Clearance to service regulator vent outlet 36 in J Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other application 36 in 4 feet below or...

Page 16: ...non freezing climates only Fig 13 Horizontal venting system concentric vent Fig 14 Horizontal parallel venting system twin pipe direct vent 6720608836 24 2V 3 80mm INTAKE EXHAUST MAINTAIN 12 IN 18 IN FOR CANADA MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL MAXIMUM OF 24 IN ABOVE ROOF DRAIN TEE 4 HORIZONTAL RUN DOWN TO TERMINATOR SIDE OF WATER HEATER NOTE MINIMUM 1FT OF STRAIGHT VENT PIPE ...

Page 17: ...o the top of the unit Fig 17 position 2 using the 3 screws and gasket provided and install 3 air intake pipe over the accessory Fig 17 Inlet connection 3 3 5 Connecting the condensate water drain i NOTE Vent pipe must be completely vertical when inserting or blue gasket inside exhaust accessory can become displaced Exhaust accessory can be removed with vent pipe attached to check gasket position 6...

Page 18: ... negative draft A leading cause of negative draft is combustion appliances in the building not being supplied with sufficient combustion air A wood stove or furnace can pull its combustion air from the water heater s vent pipe allowing the cold incoming air to freeze the cold water in the heat exchanger Supplying more combustion air for all com bustion appliances is the solution A HVAC specialist ...

Page 19: ...n the exhaust vent piping Ensure directional arrow on damper label faces in the same direction as exhaust flow If installed horizontally the axis must be horizontal or slightly pitched up towards termination to ensure damper closes 100 when heater is not running To allow accessibility damper must not be installed in an enclosed section of vent pipe Do not install damper in unconditioned spaces e g...

Page 20: ...ke necessary adjustments to fan speed values may result in improper operation of the appliance First calculate the total equivalent vent length This is the straight pipe length of both exhaust and combustion air plus the number of elbows used To determine the length equivalency of each elbow refer to tables 5 and 6 Use the equivalent vent length value to determine the appropriate fan speed values ...

Page 21: ... for instructions Table 18 Fan speed adjustment for 3 piping 1 Full equivalent length inlet outlet piping fittings Natural Gas Liquid propane Altitude above sea level Vent terminal Total equivalent vent length1 Minimum power fan speed P2 Maximum power fan speed P1 Maximum power fan speed P1 0 2000 ft 0 610 m Concentric 3 5 39 ft 13 No modification required No modification required For operation at...

Page 22: ...the selected value is memorized Adjusting maximum power fan speed P1 To select fan speed B Press ON OFF button into OFF B Press and hold Program button and press ON OFF button to turn appliance ON Fig 25 B As soon as 188 is displayed release Program but ton and the display reads P2 B Press the minus button to display P1 B Press Program button to enter P1 adjustment The current setting will appear ...

Page 23: ... minimum height of eight 8 feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall ...

Page 24: ... be 9950 cubic feet 281 8 cubic meters for the water heater alone b In unconfined spaces in buildings of conventional frame masonry or metal construction infiltration air is normally adequate to provide air for combustion Appliances located in confined spaces The confined space must be provided with two per manent openings one commencing within 12 inches 304 8mm of the top and one commencing withi...

Page 25: ...ust be kept level on the wall surface see Fig 27 page 26 B Hang the appliance on the bracket see Fig 28 page 27 Fig 26 Distance between support boards Warning The water in this water heater is cold and always remains cold except for the times the burner is on In the event of power outage in conjunction with freezing temperatures it is recommended that the heater be drained See chapter 6 2 page 41 ...

Page 26: ...uired for any appliance connector is see Fig 31 for more details on pipe sizing B Undersized flexible appliance connector not permit ted B National Fuel Gas Code requires that a sediment trap drip leg be installed on gas appliances not so equipped The drip leg must be accessible and not subject to freezing conditions Install in accordance with the recommendations of the serving gas supplier see Fi...

Page 27: ...acturer s sizing tables to determine the pipe diameter necessary If there are more gas drawing appliances on the line size the gas line according to the total maximum amount of BTU draw input rating of for all appliances combined Note Undersizing the gas line may result in diminished hot water flow rate and temperature See chapter 3 14 page 35 for the procedure to measure gas pressure Proper gas p...

Page 28: ...ck Iron Pipe Feet Pipe Internal Size Diameter inches inches 10 20 30 40 50 60 70 80 90 100 125 150 175 200 1 4 0 364 32 22 18 15 14 12 11 11 10 9 8 8 7 6 3 8 0 493 72 49 40 34 30 27 25 23 22 21 18 17 15 14 1 2 0 622 132 92 73 63 56 50 46 43 40 38 34 31 28 26 3 4 0 824 278 190 152 130 115 105 96 90 84 79 72 64 59 55 1 1 049 520 350 285 245 215 195 180 170 160 150 130 120 110 100 1 1 4 1 380 1050 73...

Page 29: ...ction Be certain there are no loose particles or dirt in the piping Blow out or flush the lines before connecting to the water heater B Full port shutoff valves should be installed on both the cold water supply and hot water outlet lines to facilitate servicing the heater see Fig 34 B For installation on a private well system with the use of a pressure tank the lowest pressure range setting recomm...

Page 30: ...above a drain and installed such that it allows complete drainage of both the PRV and the line The discharge line must be placed where it will not cause any damage The location of the PRV must be readily accessible for servicing or replacement and be mounted as close to the water heater as possible See Fig 34 To install the PRV a suitable fitting connected to an extension on a T fitting can be swe...

Page 31: ...5 page 7 B Remove the clip and disconnect the drain tube see Fig 36 Fig 36 Disconnect drain tube B Fill the condensate trap by pouring approx 14 oz 400ml of water into the top of the drain tube To avoid damage to the appliance use a funnel in this operation see Fig 37 page 31 Fig 37 Filling the condensate trap after installation B Loosen the three screws of the control unit Fig 38 B Put the contro...

Page 32: ...irculation design using the water heater in conjunction with an Ariston mini tank water heater This schematic is for illustration only and must not be used for actual Installation without appropriate engineering and technical advice from a properly licensed professional in the locality where the installation is made Fig 40 Recirculation application 1 Full port isolation valve 2 Circulator pump on ...

Page 33: ...be taken to protect users of potable water from scalding Warning Propylene glycol may be used for freeze prevention ONLY on the space heating side of the heat exchang er Do not use ethylene glycol automo tive antifreeze Warning The use of a flow switch is recommended to ensure DHW priority and to prevent cold blow situations when the Bosch tankless water heater is used with an air handling system ...

Page 34: ...tmospheric vacuum breaker 8 Cold inlet 9 Check valve 10 Pump 11 Thermostatic mixing valve 12 Thermometer optional 13 DHW outlet 14 Water to water heat exchanger 15 Backflow preventer 16 Automatic water feed 17 Thermostat 18 Space heating zone 19 Zone controller 20 Space heating pump 21 Expansion tank 22 Pressure relief valve 6720644887 02 1V 2 1 3 5 6 7 8 13 11 12 5 21 17 20 14 10 9 9 9 15 16 22 1...

Page 35: ...n on high volume of hot water flow at least 6 gpm and burner will light If heater display reverts to P2 open more hot water fixtures to allow sufficient flow Press until P1 reappears on the display B Record lowest operating gas pressure reading in table 22 Gas pressures lower than 3 5 W C for Natural Gas or 8 W C for LPG will result in insufficient degree rise to the hot water being used reduced h...

Page 36: ...rews from the control unit Fig 46 B Remove the six screws from the back cover of the control unit see Fig 47 pos 2 B Check the fuses in the printed circuit board see Fig 47 pos 3 Fig 47 Fuses position B After checking the fuses reinstall all parts in reverse order Warning For safety reasons disconnect the power supply cord to the heater before any service or testing is performed Warning This heate...

Page 37: ...stand by LED 5 1 Description LCD Display Fig 49 Power bar indicator input Fig 50 Temperature indicator Fig 51 Error indicator Fig 52 Locked condition indicator only with remote control Fig 53 Flame indicator Fig 54 Solar mode indicator see chapter 5 4 page 38 Fig 55 Remote control indicator Warning Do not use any cleaning agressive or corrosive agents to clean the window ...

Page 38: ...56 Off B To shut down the appliance press the On Off button again 5 4 Temperature selection To select hot water temperature B Press buttons or in order to reach desired temperature Fig 57 Setting the water temperature The desired temperature of the hot water can be adjusted on the front control panel of the heater The water heater has an electronically controlled gas valve that modulates the burne...

Page 39: ...ercentage in use 5 7 Reset button If the LCD shows the error symbol do not shut off power or unplug the heater Follow instructions below to reset error first Record the error code on LCD and consult Problem solving section 8 1 page 49 Fig 61 After following instructions indicated in Troubleshooting section B press reset button firmly in order to return heater to normal operation Fig 62 Reset butto...

Page 40: ... order to select memorized temperature B Press Program key LCD shows pre memorized temperature which is now the hot water selected temperature 5 9 Locked condition This condition is only valid for appliances with one or more remote controls installed Fig 64 Locked condition Whenever LCD shows the temperature setting cannot be adjusted because the appliance is in use by a user which already selecte...

Page 41: ...ld up or blockage To access fincoil consult service bulletin at www bosch climate us If there is evidence of soot build up or blockage the heat exchanger should be removed by a professsional and cleaned thoroughly Condensate trap Check water level in the condensate trap see Fig 35 If appliance is out of service for more than 10 days fill as described on page 31 Check for debris and clean if needed...

Page 42: ...oute the other end of this line into a descaling reservoir 7 Using a 3rd line C from the descaling reservoir connect to the inlet side of circulating pump Install a filter on the end of the line in the descaling reservoir 8 Make sure all connections are water tight 9 Fill tank with descaling solution so both lines inside are submersed We recommend a straight white vinegar solution If using a comme...

Page 43: ...Avoid air gaps between probe and measuring port as they can alter readings Fig 68 Measuring port B While holding the Program P button press the ON OFF button to turn ON the heater see Fig 69 As soon as 188 flashes on the display release the Program button The display should now read P2 Press button until P1 appears on display Fig 69 B Measuring CO2 Combustion cover Installed B Open all hot water t...

Page 44: ... very sensitive and should be made in small increments It may take several minutes for readings to stabilize 3 Verify both P1 and P2 CO2 readings are within the ranges specified in table 24 Repeat steps 1 and 2 as necesssary until CO2 values are within the specified ranges Final Readings P1 CO2 Reading CO2 P2 CO2 Reading CO2 D Returning to Service 1 Return slotted screw cover to original position ...

Page 45: ...46 LP 46 21 NG 48 LP 48 see chapter 3 14 page 35 note reducing P1 values below maximum will reduce maximum power of the appliance P2 Minimum Power 13 12 20 see chapter 3 3 7 page 20 P3 Remote Controls installed _0 _0 6 see chapter 5 5 page 39 P4 Access to Diagnostic Mode E 0d 10f see chapter 6 7 page 46 P5 Cascade Mode NO NO CC contact Bosch for details P6 Temperature Unit F F C P7 Appliance Type ...

Page 46: ...d back ON again to return heater to normal function 6 7 1 Working hours To see how many hours the appliance has worked please enter the Diagnostic menu chapter 6 7 B Select the sub mode H0 Write the number that shows in the display B Select the sub mode H1 Write the number that shows in the display B Select the sub mode H2 Write the number that shows in the display After checking the sub modes H0 ...

Page 47: ...tions between the water valve control unit and electrode set See chapter 12 2 page 59 for location of these parts 9 Water heater in solar mode If inlet water temperatures exceed the water heater s set temperature the burners will not ignite and the solar mode indicator will show on the display See Fig 54 page 37 7 3 Water is too hot 1 Selected temperature on the unit is too high To lower output te...

Page 48: ...ired for activation Verify inlet filter screen is clean and clear of debris See chapter 6 1 page 41 for inlet filter cleaning instructions 3 Heater deactivated by temperature balancing valves If the outlet water temperature is set too high the heater can produce temperatures that are too hot A temperature balance shower valve will automatically mix in cold water to reduce the hot water temperature...

Page 49: ...t 1 Check backflow temperature sensor connection See Fig 77 1 page 57 2 Replace exhaust temperature sensor 3 Check sensor ref page 54 chapter 10 Outlet temperature sensor fault Temperature below 36 F or above 210 F 1 Check red wire connections at hot water temperature sensor Clean terminals with an eraser If badly corroded replace sensor and wire harness See Fig 72 page 53 2 Sensor may trip if wat...

Page 50: ...ol unit call Bosch Water Heating for further instructions Flashing Water flow signal over specified maximum value Water flow 10 gallon min Status message 1 Disconnect power supply cord and check wire connections on water valve and the two connectors on the control board see Fig 84 page 65 2 Excessive water pressure and flow Ensure water pressure is less than 150psi and flow rate is below 10 gallon...

Page 51: ...r has a high mineral content periodic descaling may necessary see chapter 6 3 page 42 5 Unplug power supply cord to the water heater Open a hot water tap for several minutes to allow cold water to pass through heat exchanger Close hot water tap and disconnect lead wires to overheat sensor Using a multimeter check continuity through overheat sensor contacts Replace sensor if open No flame ionizatio...

Page 52: ...esetting error code Use the reset button to reset any error codes 3 Possible defective control unit call Bosch Water Heating for further instructions Ionization error at standby 1 Loose connection to the flame ionization rod Verify that the thinner wire leading from the control unit is securely connected to the set of electrodes located on the lower front of the heat exchanger 2 Flame ionization r...

Page 53: ...or 8 Flue gas limiter 9 Heat exchanger overheat sensor ECO 10 Gas valve 11 Exhaust temperature sensor 12 Water valve 13 Primary fan 14 ON OFF switch 15 Secondary fan 16 AC plug 17 Main connection 18 Ignition electrodes 19 Ground post 20 Antifreeze kit connection 21 Fuse 22 Fuse 20 1 16 1 JP5 JP6 JP7 JP8 JP2 M PS M M E FS T 104 C T 220 F T 90 C T 194 F Casc input Casc output 2 1 4 5 6 7 9 10 11 12 ...

Page 54: ... 29 30 31 32 33 34 35 36 37 Resistance Kohm Temp ºF 0 5 10 15 2 0 2 5 3 0 3 5 4 0 4 5 50 55 6 0 6 5 70 75 8 0 8 5 9 0 9 5 10 0 10 5 110 Temp ºC Inlet NTC characteristics 3 2 3 7 4 2 4 7 52 57 6 2 6 7 72 77 8 2 8 7 9 2 9 7 10 2 10 7 112 117 12 2 12 7 13 2 13 7 14 2 14 7 152 157 16 2 16 7 172 177 18 2 18 7 19 2 19 7 2 0 2 2 0 7 2 12 2 17 2 2 2 2 2 7 2 3 2 2 3 7 2 4 2 2 4 7 0 1 2 3 4 5 6 7 8 9 10 11 ...

Page 55: ... 17 2 17 7 18 2 18 7 19 2 19 7 2 0 2 2 0 7 2 12 2 17 2 2 2 2 2 7 2 3 2 2 3 7 2 4 2 2 4 7 2 5 2 2 5 7 2 6 2 2 6 7 2 7 2 2 7 7 2 8 2 2 8 7 2 9 2 2 9 7 3 0 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 Resistance Kohm Temp ºF 0 5 10 15 2 0 2 5 3 0 3 5 4 0 4 5 50 55 6 0 6 5 70 75 8 0 8 5 9 0 9 5 10 0 10 5 110 115 12 0 12 5 13 0 13 5 14 0 14 5...

Page 56: ...6 720 646 812 56 Functional scheme 11 Functional scheme Fig 76 Functional scheme ...

Page 57: ...tion sensor 5 Primary fan Mixer 6 Hot water temperature sensor 7 LCD display 8 On Off button 9 Reset button 10 Program key 11 Flue gas limiter 12 Heat exchanger overheat sensor ECO 13 Ignition electrodes 14 Observation window 15 Backflow temperature sensor 16 Secondary air fan 17 Gas valve 18 Condensate trap 19 Water valve with flow sensor and cold water temperature sensor 20 Control unit 21 Up bu...

Page 58: ...6 720 646 812 58 Interior components diagram and parts list Fig 78 Appliance overview ...

Page 59: ...0 4 Cover screw 8 703 401 170 5 Combustion cover 8 700 506 300 6 Combustion cover gasket 8 704 701 084 7 Observation window 8 705 600 003 8 Holding bracket 8 708 104 103 9 Screw 8 703 403 012 Table 30 10 Combustion cover clip 8 701 201 032 11 Grommet set 8 710 203 039 12 Exhaust accessory 8 705 504 152 13 Gasket exhaust 8 700 103 710 14 Inlet air cover 8 708 006 022 15 Inlet air gasket 8 700 103 1...

Page 60: ...ior components diagram and parts list 12 2 2 Group 2 Fig 80 Components Diagram 12 30 25 13 15 20 1 4 5 6 7 3 2 8 9 10 8 8 11 11 8 12 14 21 22 13 18 17 16 16 13 19 17 23 24 27 28 28 28 29 31 32 33 35 26 6720902980 AA JF 34 13 ...

Page 61: ...densing heat exchanger 8 705 700 161 15 Condensing exchanger left side 8 705 700 162 16 Condensing exchanger side gasket 8 704 701 091 17 Allen screw 2 918 060 162 18 Condensing exchanger right side 8 705 700 163 19 Screw 2 910 611 496 20 Fincoil O ring 8 700 205 226 21 Condensing fincoil 8 700 715 402 22 O ring 8 700 205 228 23 Condensate drain connector 8 705 506 838 24 Condensate drain connecto...

Page 62: ... Primary fan 8 707 204 071 4 Backflow temperature sensor 8 707 206 459 5 Washer 8 704 701 097 6 Fan mount nut 2 915 011 006 7 Secondary fan LP Gas 8 707 204 074 7 Secondary fan Natural Gas 8 707 204 072 Table 32 8 Screw 8 703 403 012 9 Gas Air Mixer 8 705 700 170 11 Venturi 8 700 306 226 12 O ring 8 700 205 224 13 Mixer Fan gasket 8 704 701 059 14 Screw 2 910 642 150 15 Plate gasket 8 701 004 049 ...

Page 63: ...tapping 8 703 404 219 3 Washer 8 700 203 041 4 Pressure balance tube 8 700 703 136 5 Pressure balance nut 8 703 300 041 6 Gas supply pipe 8 700 715 389 7 Gas valve washer 8 700 103 014 Table 33 8 Gas filter 8 700 507 002 9 Gasket 8 704 701 085 10 Gas Fan connector 8 705 202 140 11 Washer 8 704 701 062 12 Regulation screw 8 703 404 220 13 O ring 8 700 205 009 14 Screw 2 910 149 181 Item Description...

Page 64: ...4 4 Pipe connection clip 8 701 201 028 5 Hot water pipe 8 700 715 469 6 Temperature sensor 8 700 400 015 7 Outlet fitting 8 703 305 349 8 Inlet Outlet washer 8 710 103 045 9 Wireform spring 8 701 300 025 Table 34 10 Inlet fitting 8 703 305 348 11 O ring 8 700 205 157 12 Watervalve clip 8 716 102 607 13 Water filter 8 700 507 001 14 Inlet fitting with filter optional 8 703 305 356 15 Washer optiona...

Page 65: ...Power supply cables 8 704 401 371 5 Power supply cord 8 704 401 378 6 Fan cables 8 704 401 347 7 Wire harness 8 704 401 348 9 Electrode cables 8 704 401 346 Table 35 10 Flue gas limiter 8 700 400 032 11 Kit Inteligent Cascading 7 709 003 962 12 Anti freeze kit 7 709 003 665 13 Remote control optional TSTAT2 14 Shaped seal optional 8 700 201 012 15 Screw optional 8 703 401 109 16 Printed circuit tr...

Page 66: ...fe 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 in the appliance or with the remote control This way you have the precise water flow needed mixing cold water to regulate temperature will increase ...

Page 67: ...ts at BTC approved rates for one 1 year from the date of original installation provided it is installed and properly maintained by a qualified heating contractor and the other conditions of this warranty are met ITEMS NOT COVERED This limited warranty does not cover the following cir cumstances 1 Components or parts not provided by BTC 2 Serviceable items and normal maintenance as required per the...

Page 68: ...ions and exclusions may not apply to you WARRANTY CLAIMS PROCESS If you have a warranty claim you should notify the heat ing contractor who installed your Tank and ask that the contractor notify the distributor from whom the contrac tor purchased the Tank If this action is not possible or you don t receive a response contact Bosch Thermo technology Corp 50 Wentworth Avenue Londonderry NH 03053 To ...

Page 69: ...6 720 646 812 Notes 69 15 Notes ...

Page 70: ...6 720 646 812 70 Notes ...

Page 71: ...6 720 646 812 Notes 71 ...

Page 72: ...number is located on rating plate on right side panel Gas Pressure Reading Static__________ Operating__________ Building Water Pressure __________ Range if on Well system __________ Installing Company _____________________________________________ Installer name _____________________________________________ Address _____________________________________________ Phone ________________________________...

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