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Bosch Appliances GWH-345/450-ESR-N manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    GWH 345/450 ESR T emperat ure Modulated wit h Elec t ronic Ignition Suit able for heat ing and rec irc ulat ing pot able wat er GWH-345/450-ESR-N - Natural Gas GWH-345/450-ESR-L - Liquefied Petroleum (LP) Gas 6 720 607 909 US (2008. 02) JS Warning: If the information in this manual is not followed exactly, a fire or explosion may result causing pro[...]

  • Page 2

    6 720 607 909 2 Index Index 1W a r n i n g 2 2 Appliance details 4 2.1 Features 4 2.2 GWH-345/450-ESR Spec ifications (Technical data) 4 2.3 Unpacking the GWH-345 /450-ESR heater 5 2.4 General rules to follow for safe o peration 6 2.5 Dimensions and minimum instal lation clearances 7 2.6 Applications 8 2.7 Water qu ality 9 3 Installation instructio[...]

  • Page 3

    6 720 607 909 Warning 3 FCC: This device complies with Part 15 of the FCC ru les. Operation is subj ect to the following two con ditions: (1) This device may not cause h armful interference, and (2) this device must acc ept any interference received, including interferenc e that may cause un desired operation. Fig. 1 Warning: The recircula ting wat[...]

  • Page 4

    6 720 607 909 4 Appliance details 2 Appliance details 2.1 Features Parts • Sealed combustion burner. Safety • Ionization flame sensor • Over temperature protection. High quality material s for long working life • Copper heat exchanger • C o m p a c t s p a c e s a v e r : m o u n t s o n a w a l l w i t h supplied bracket. Features • LC[...]

  • Page 5

    6 720 607 909 Appliance details 5 Water resistant IP X4 (protection against water drops) 2.3 Unpacking the GWH-345/450-ESR heater This heater is packed securely. The box includes: • Wall-mounted gas fired recirculating water heate r • Bracket and screws for wal l hanging the heater • Exhaust vent adaptor (with 4 screws and gasket provided) ?[...]

  • Page 6

    6 720 607 909 6 Appliance details 2.4 General rules to follow for safe operation 1. You must follow these i nstructions when you install your heater. In the United States: Th e installation must conform with local codes or, in the absen ce of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54. In Canada: The Installation must conform with [...]

  • Page 7

    6 720 607 909 Appliance details 7 2.5 Dimensions and minimum installation clearances Fig. 4 Di mensions 1 Combustion air inlet ad apter (right side only ) 2 Exhaust adapter with CO 2 measuring point 3 Front cover 4 On/Off button 5 Reset button 6 Recirculating water tempera ture selecto r 7 LED - (ON ) warnin g light (b links wh en in error lock out[...]

  • Page 8

    6 720 607 909 8 Appliance details 2.6 Applications Introduction The application designs provided in this manual are general guides to be used when installi ng this recirculating water heater. Pump Sizing Required PS pumps are Taco 007 Br onze or Grundfos 15-42B. PZ pump s should be sized by a professional plumb- ing contractor based on the specific[...]

  • Page 9

    6 720 607 909 Appliance details 9 Pressure drop curves Note : Flow above 6 GPM is not permitted. Fig. 8 GWH 345 ESR Fig. 9 GWH 450 ESR 2.7 Water quality Water quality can have an impact on appliance performance and ap pli ance longevity, and may not be covered by the manufacturer's warranty. For water analysis data call your local water depart[...]

  • Page 10

    6 720 607 909 10 Installation instructions 3 Installation instructions 3.1 Introduction Please follow these instru ctions. Failure to follow instructions may result in: • Property damage or personal injury •I m p r o p e r o p e r a t i o n • Heater damage • Loss of warranty. Please contact Bosch Water Heatin g with any questions. 3.2 Prope[...]

  • Page 11

    6 720 607 909 Installation instructions 11 Fig. 10 Mounting the heater 3.5 Combustion air requirements Twin pipe The GWH-345/450-ESR is designed as a sealed combustion appliance. It is recommended that the combustion air be provided by a dedicat ed 3” pipe to the outside. If terminating combustion air pi ping horizontally, pitch vent down 1/4&quo[...]

  • Page 12

    6 720 607 909 12 Installation instructions • Appliances located in confined spaces: The confined space must be provided with two per- manent openings, one commencin g within 12 inches (304.8mm) of th e top and one commen cing within 12 inches (304.8mm) of the bottom of the enclos ure. Each opening must have a minimum free area of one square inch [...]

  • Page 13

    6 720 607 909 Installation instructions 13 3.6 Venting 3.6.1 Vent material and specifications Establish vent clearances th at comply with the vent manufacturer's specifications. In all cases follow local codes. Note: Listed thimbles or collars are ne cessary to pass through wall and ceili ng partitions. If the vent system passes through combus[...]

  • Page 14

    6 720 607 909 14 Installation instructions Fig. 13 Maximum vent an d combustion air lengths Vent material The GWH-345/450-ESR requires 3 inch sealed single wall stainless steel vent pipe (AL29-4C). Use of any other vent material will vo id the manufactures warranty and may result in a hazardous condition. For specifi c questions concerni ng vent ma[...]

  • Page 15

    6 720 607 909 Installation instructions 15 Fig. 14 Exhaust ven t connection[...]

  • Page 16

    6 720 607 909 16 Installation instructions Selecting inlet air restrictor Note: Before installing the combustion air inlet accessory, the appropriate inlet air restrictor must be determined using Tables 6 , 7 and 8 . Refer to Fig. 15 for mounting sequence . B Determine the total length of th e straight sections of 3" stainless steel exhaust an[...]

  • Page 17

    6 720 607 909 Installation instructions 17 Use table below to define which restrict or to be used. After installation is complete, check CO 2 levels per chapter 3.9. Combustion air inlet connection The combustion air inlet accessory can only be connected to the top right of the appliance. The left side must remain sealed. Note: Before installin g t[...]

  • Page 18

    6 720 607 909 18 Installation instructions 3.6.3 C ondensate drain requirements An external condensate drain must always be in stalled except when using one 90° elbow and less than 3 feet of horizontal pipe. Note: condensate must be dispos ed of according to local codes. 1. Install condensate drain as close to heater as possible. 2. Use 3/8" [...]

  • Page 19

    6 720 607 909 Installation instructions 19 3.6.5 Vertical terminations Horizontal runs Any gas vent section that is greater than 45 degrees from the vert ical is con sidered hori zontal. Hori zontal sections must slope upwards from heater at least ¼ inch for every foot of its horizontal length and be properly supported. Under no circumstances shou[...]

  • Page 20

    6 720 607 909 20 Installation instructions 3.6.6.1Requirements for i nstallation in Massachusetts Attention residents of the Comm onwealth of Massachusetts : In the Commonwealth of Massachusetts the fol lowing regulation went into effect on 12/30/2005: (a)For all side wall horizontally vented gas fu eled equipment installed in eve ry dwelling, buil[...]

  • Page 21

    6 720 607 909 Installation instructions 21 Recommended exhaust vent terminator position Fig. 21 * Subject to local codes and anticipated snow level ** Other equipment that operates with a mechanical air inlet may require greate r distances, referenc e manufacturer's instruc tio ns NOTICE : Exhaust and ai r intake must always be locate d on the[...]

  • Page 22

    6 720 607 909 22 Installation instructions 3.6.7 Exhaust vent configur ation examples Fig. 22 Horizontal side wall venting installation Fig. 23 Vertical venting i nstallation - Maso nry Chimney Fig. 24 Vertical ven ting installation NOTE: If appliance uses room air, do not place any other combustion appliance in t he same space, to avoid depressuri[...]

  • Page 23

    6 720 607 909 Installation instructions 23 3.7 Gas piping & connections Before connecting the gas suppl y, check the rating plate on the right side of the heat er to be sure that the heater is rated for the same gas to whi ch it will be connected. In the United States: The i nstallation must conform with local codes or, in the absence of local [...]

  • Page 24

    6 720 607 909 24 Installation instructions FOR NA TU RAL 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 Sp ecific Gravity Gas) Btu num bers given in thousands. Fig. 26 Follow boxed numbers for piping just one GWH -450-E S R ( exam[...]

  • Page 25

    6 720 607 909 Installation instructions 25 3.8 Measuring gas pressure Connecting manometer B Turn power off. B Shut off gas supply. B Remove front cover and locate the inlet gas measuring point (see Fig. 27). B Loosen screw inside test point fitti ng (do not remove) and connect manometer tube on test point. Fig. 27 Gas pressure measuring (lower tap[...]

  • Page 26

    6 720 607 909 26 Installation instructions B If the CO 2 content is to o high, use the next small est restrictor. B After replacing the restrictor, measure CO 2 level again. Repeat procedure unti l correct level is obtained. B Once correct reading is obtained, replace screw with gasket in exhaust collar. B Press On/Off button to turn heater Off and[...]

  • Page 27

    6 720 607 909 Operating instructions 27 4 Operating instructions 4.1 Initial filling instructions Before proceeding with the operation of th e heater make sure that the system is filled with water: B Turn off power supply to heater. B Open the cold water inlet supply to the heater fully. B Open a hot water faucet to permit t he water to fill the he[...]

  • Page 28

    6 720 607 909 28 Operating instructions 4.4 Power On T o start the appliance: B press the ON /O FF button. LED (fig. 31) goes orange. When the burner is working, the LCD display shows the symbol . Fig. 32 Off T o shu t down the appliance: B press the ON /O FF switch to OF F position. 4.5 Recirculating water temperature Water temperature can be regu[...]

  • Page 29

    6 720 607 909 Operating instructions 29 4.8 Electrical diagram Fig. 35 Electrical scheme 10 Flame sensor 11 Ignitor electrode 12 Gas valve 13 Junction box (wiring of tank pump) 14 Fan 15 Temperature li miter / ECO 16 Differential pressure switch 17 TT connectio n - under low v oltage cove r plastic 18 Domestic hot wate r temperature sensor (12 kOhm[...]

  • Page 30

    6 720 607 909 30 Maintenance and service 5 Maintenance and service The unit should be checked once a year by a gas technician. If repairs are neede d, the repairs should be done by a gas technician To remove front cover B Loosen the two Philips head sc rews (as shown in Fig. 2). B Pull control panel upwards and then pull it downwards. B Lift front [...]

  • Page 31

    6 720 607 909 Maintenanc e and service 31 Parameter storage B Keep pressing the reset button for at least 2 seconds in order to record adjus tments. The digital display blinks with the symbol . Exiting servic e mode B Press ON/OFF button to turn appliance OFF and then back ON again. Mode Parameter Values 01 Not used ---------- 02 Not used ---------[...]

  • Page 32

    6 720 607 909 32 Troubleshooting 6 Troubleshooting Fault Indication Possible Cause Check E9 Shut down by the temperature limiter (over temperature). • 1. Check position of heating NTC • 2. Check temperature limiter, cables • 3. Check system with air, air vent • 4. Bleed air from system. EA No Flame detected (no ignition). • 1. Check gas i[...]

  • Page 33

    6 720 607 909 Troubleshooting 33 Error lock-out is indicated by the orange LCD blinking. An e rror lock-out is done for safety reasons. After fixing the problem, press the reset button to return t he heater to service. Only tank loading (no heating functio n). No heat demand by the thermostat, thermostat not well adjusted, other defect. • 1. Chec[...]

  • Page 34

    6 720 607 909 34 GWH-345/450-ESR Functional scheme 7 GWH-345/450-ESR Functional scheme Fig. 36 Fun ctional scheme APS - Air Pressure Switch[...]

  • Page 35

    6 720 607 909 Interior components diagram and parts list 35 8 Interior components diagram and parts list 8.1 Interior components Fig. 37 Components 1 Combustion air inlet ad apter (right side only ) 2 Exhaust adapter with CO 2 measuring point 3 Front cover 4 On/Off button 5 Reset button 6 Recirculation water tempera ture selector 7 LED - (ON ) warn[...]

  • Page 36

    6 720 607 909 36 Interior components diagram and par ts list 8.2 Components diagram Fig. 38 Components Diagram[...]

  • Page 37

    6 720 607 909 Interior components diagram and parts list 37 8.3 Parts list Item Descriptio n Referen ce GROUP 1 1 Front cover 8 705 431 223 2 Cover screw no . 10 x 22mm 2 910 612 435 3 Trade mark badge 8 701 103 140 4 Gasket 8 704 701 077 5 Support set 8 708 006 130 6 Grommet set 8 710 203 039 7 Deflector plate 8 700 100 376 8 Screw M4,8 x 9,5mm 8 [...]

  • Page 38

    6 720 607 909 38 Protecting the environment 9 Protecting the environment Packing The packing box may be ful ly recycled as confirmed by the recycling s ymbol . Components Many parts in the heate r can be fully re cycled in the end of the product life. Cont act your city auth orities for information about the disposal of recyclable products. Saving [...]

  • Page 39

    6 720 607 909 Ten Year Limited Warranty 39 10 Ten Year Limited Warranty General BOSCH PRO water heaters ar e warranted by the Manufacturer. Bosch Thermotechnology C orp. will furnish a replacement heat ex changer and will furnish a replacement of any part which fails in normal use and service within the applicable periods specified below, in accord[...]

  • Page 40

    B OSC H TH E R M OTEC H NO LOG Y CO RPO R A T I O N 50 W entworth Avenue Londonderry , N H 030 53 T el . 8 66-330-27 30 www .bo schpr o.com Bosch T ermotecnologia SA Estrada de C acia 380 1 - 856 Aveiro - P O RTUG AL Recycled paper © 200 8 Bosch T hermotec hnology C orp., Londonderry, NH Installer Checklist, to be performed by installer upon insta[...]