Bosch Aquastar GWH 1600 H N, User Manual

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 Massachusettes the 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 ...

Page 2: ...8 5 5 Vent assembly 18 5 6 Mineral scale build up 18 6 Troubleshooting 19 6 1 Introduction 19 6 2 No spark at pilot with water flow 19 6 3 Spark appears when hot water is turned on but pilot and burners will not ignite 19 6 4 Pilot light but burners will not come on 20 6 5 Main burners go out during hot water use 20 6 6 Hot water temperature fluctuates at tap 21 6 7 Water is too hot 21 6 8 Water i...

Page 3: ...r 3 8 Venting Natural Draft Vent diameter inches 5 Minimum height feet 6 with no elbows Vertical termination Sidewall termination only with AQ4 power vent kit Water Hot water connection inches NPT Cold water connection inches NPT Water valve material Polymer PPS Polypropylene Sulfid Minimum water flow 0 6 gallon minute 2 2 l m Minimum recommended water pressure 30 PSI 2 07 bar Connections Bottom o...

Page 4: ...National Fuel Gas Code ANSI Z223 1 NFPA 54 In Canada The Installation should conform with CGA B149 1 2 INSTALLATION CODES and or local installation codes 2 Carefully plan where you install the heater Proper clearances must be followed 3 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 te...

Page 5: ...ver 37 Hole for fixing to wall 38 Exhaust pipe to wall 39 Draught diverter with flue gas monitor 40 Gas valve 49 Observation window 51 On Off switch 110 LED failure indicator Fig 4 Minimum clearances Model GWH 1600 H TOP A 12 inches 306 mm FRONT B 4 inches 100 mm BACK 0 inches SIDES 4 inches 100 mm BOTTOM C 12 inches 306 mm Dimensions inches mm GWH 1600 H A 16 73 425 B 25 75 655 C 13 15 334 D 5 11...

Page 6: ...r is noncombustible For installations in an alcove or closet maintain the minimum clearances to combustible and non combustible materials listed below See also Fig 4 A Top 12 inches 306 mm B Front 4 inches 100 mm C Back 0 inches D Sides 4 inches 100 mm E Bottom 12 inches 306 mm Warning The water in this water heater is cold and always remains cold except for the times that hot water is being used ...

Page 7: ...mmended that support board s either 1x4 s or 1 2 minimum plywood first be attached across a pair of studs and then the heater should be attached to the support boards See Fig 7 B Secure the two included L shaped hooks to wall studs or support board 13 apart See Fig 7 B Hang heater on two L shaped hooks See Fig 8 Fig 6 Remove front cover Fig 7 Support board Fig 8 Secure heater to wall Warning befor...

Page 8: ...losure This opening must have a minimum free area of one square inch per 3000 Btu hr if all air is taken from the outside by a direct opening or vertical duct Louvers grills and screens have a blocking effect If the effective free area is not known increase the sizes of your openings by 400 if your louvers are wood and by 135 if your louvers are metal Refer to the National Fuel Gas Code for comple...

Page 9: ...al gas vent height Vent termination The gas vent constructed of double wall Type B gas vent must terminate above the roof surface with a listed vent cap at a height that s in accordance with Fig 11 and table 2 provided they are at least 8 feet 2 4 m from a vertical wall or similar obstruction All other gas vents that are not able to terminate within the minimum specified height allowed must termin...

Page 10: ...ipe check local codes for clarification The lining material must be listed for use only with naturally drafting draft hood equipped gas appliances Follow manufactures instructions for installation of listed lining material You may not vent any other fuel burning appliances into any free space remaining in the chimney The minimum vertical gas vent length within the masonry chimney should be no less...

Page 11: ...ks HIGH ALTITUDE INSTALLATION The pressure regulator provided with the heater is adjusted to deliver the proper gas pressure as indicated on the rating plate and in the manual for altitude up to 2000 feet 660 meters above sea level On appliances being installed above 2000 ft 660 meters elevation the inlet gas pressure should be set at installation to the value shown below Note The gas pressures sp...

Page 12: ...ure Drop of 0 5 Inch Water Column EHD Equivalent Hydraulic Diameter The greater the value of EHD the greater the gas capacity of the tubing Tube size inches EHD 10 20 30 40 50 60 1 2 18 EHD 82 58 47 41 37 34 3 4 23 EHD 161 116 96 83 75 68 1 30 EHD 330 231 188 162 144 131 1 1 4 37 EHD 639 456 374 325 292 267 Length of Flexible Corrugated Stainless Steel Tubing CSST Feet Tube size inches EHD 10 20 3...

Page 13: ...n occur to the internal water valve from heating of the pipe Plastics or other PEX type plumbing line materials are not recommended for connecting directly to the water heater Keep water inlet and outlet pipes to no less than 12 7mm diameter to allow the full flow capacity It is recommended that all water piping below the heater be properly insulated to avoid heat loss The freeze protection provid...

Page 14: ...s When turning the heater on follow these instructions exactly B Before operating the unit set the On Off switch to the On position The On Off switch is located behind the flip down coverplate on the front panel strip Smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS B Close g...

Page 15: ... minimum activation rates listed in table 4 The automatic ignition system first ignites the safety pilot burner which then ignites the main burner in about 4 seconds B 6 The green LED indicator is on when the main burner is on B 7 The pilot flame will extinguish 10 30 seconds after the burners come on The burners will remain on until the hot water tap is turned off Note The GWH 1600 H operates in ...

Page 16: ...details Fig 20 As the temperature adjustment knob is turned counter clockwise the output temperature will lower and the activation rate will be raised Turning the knob clockwise will raise the temperature and lower the activation rate 4 5 Power adjustment Less power Lower water temperature Fig 21 More power Higher water temperature Fig 22 4 6 Purge the appliance If there is a risk of freezing proc...

Page 17: ...ter valve Loosen the two set screws at the bottom of the water valve where it connects to the gas valve If the set screws are seized STOP and call Bosch tech support before proceeding Forcing and snapping seized set screws may cause irrevocable damage to the water valve and gas valve assemblies Remove the water valve by pulling it to the right Separate the two halves of the water valve by removing...

Page 18: ...ain water from the unit s heat exchanger by disconnecting inlet and outlet water connections 5 Connect the line A from the outlet of the circulating pump installer supplied to the inlet water fitting on the water heater 6 Using another line B connect to the water outlet fitting on the water heater Route the other end of this line into a descaling reservoir 7 Using a 3rd line C from the descaling r...

Page 19: ...ush the hydro generator Reinstall hydro generator and take another voltage reading If voltage is at least 1 6VAC proceed to next step If voltage is still low hydro generator may be damaged defective Visit www boschhotwater com to purchase replacement part or call Bosch Water Heating at 800 642 3111 for replacement part if still under warranty 8 If using a power vent check the safety spillage switc...

Page 20: ... eraser 6 The water valve assembly which allows gas flow to the burners requires periodic maintenance every 2 5 years depending on water quality and use Visit www boschhotwater com to purchase water valve rebuild kit to service the water valve 7 Electric control box burner electro valve or flame sensor maybe damaged defective Verify adequate voltage at the spade connection of the burner electro va...

Page 21: ...d for cold water mixed by turning the power adjustment knob clockwise for lower hot water temperatures See chapter 4 5 If the problem persists go to www boschhotwater com for a more detailed service bulletin on this problem 4 The water heater is designed to modulate gas flow to the burners when water flow varies If the water pressure in the home is erratic and the water flow is not consistent whil...

Page 22: ... depending on water quality and use Visit www boschhotwater com to purchase water valve rebuild kit to service the water valve 7 Gas pressure is too low Ensure gas pressure is in accordance with specifications in the installation manual See chapter 3 9 A gas pressure reading is needed to proceed further Contact your original installer or a local certified gas technician to obtain this reading 6 9 ...

Page 23: ...rly Ensure the venting is in accordance with requirements in the installation manual See chapter 3 7 6 The water heater has burners much like a furnace It is essential that they remain clean and are supplied with adequate air for combustion If the flames burn yellow or orange it is strongly recommended that the burners be removed from the unit and cleaned Once the burners are removed the fins in t...

Page 24: ... components and diagram parts list 8 1 Interior components Fig 26 Functional scheme 4 Heat exchanger 5 Main gas burner 9 Electronic control box 10 Temperature adjustment selector 11 Water valve 22 Flexible hot outlet 26 Output control 30 Pilot gas tubing 51 on off switch ...

Page 25: ...omponents and diagram parts list 25 8 2 Components diagram Fig 27 Components Diagram 40 38 32 20 19 15 12 10 14 13 11 16 17 18 8 6 7 21 22 23 24 25 26 27 28 29 30 6720608032 07 1 JF 42 35 24 33 36 39 2 1 3 5 9 4 34 37 41 43 44 ...

Page 26: ...962 0 19 Gas valve NG 8 707 011 976 0 20 Pilot injector LP 8 708 200 321 0 20 Pilot injector NG 8 708 200 322 0 21 Microswitch 8 707 200 020 0 22 Gas pressure regulator LP 8 707 406 083 0 22 Gas pressure regulator NG 8 707 406 084 0 23 Water valve 8 707 006 344 0 24 Watervalve pushrod 10x 8 703 204 051 0 25 Diaphragm L 8 700 503 084 0 26 Inlet water connection 8 700 306 110 0 27 Selector screw 8 7...

Page 27: ...lying the replacement part s BBTNA will provide ground service delivery for these parts Expedited or upgraded shipping will be charged to the customer Service Labor Costs This warranty does not cover any labor costs associated with service removal or re installation of part s All such costs must be borne by the Purchaser Additionally this warranty does not cover any labor costs associated with ser...

Page 28: ...re __________ Installing Company _____________________________________________ Installer name _____________________________________________ Address _____________________________________________ Phone _____________________________________________ See Chapter 3 8 and gas pressure table to be filled out by installer Installation manual should be left with the owner after the installation is tested an...