Bosch DHW Tank QWST120 O Installation And Maintenance Instructions Manual Download Page 1 | Manualshive

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Installation and Maintenance Instructions

DHW Tank

QWST120 O

6 720 648 100-00.1ITL

6 720

648 0

71 (

2012

/0

3)

U

S

1
2
3
...
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Summary of Contents for DHW Tank QWST120 O

Page 1: ...Installation and Maintenance Instructions DHW Tank QWST120 O 6 720 648 100 00 1ITL 6 720 648 071 2012 03 US ...

Page 2: ...llation 5 3 Moving the tank 6 4 Dimensions and connections 7 5 Installation 8 5 1 Safety limits 8 5 2 Connections and fittings 8 5 3 Temperature monitoring control options 9 5 3 1 Installing the temperature sensor 9 5 3 2 Installing the Aquastat 10 6 Commissioning 11 7 Maintenance and cleaning 12 7 1 Checking the magnesium anode 12 7 2 Cleaning 13 7 3 Recommissioning after cleaning 13 8 Spare part...

Page 3: ...ocal jurisdiction B Clean and perform maintenance at least once a year Check that the entire system functions properly at the same time Immediately remedy faults Danger from failing to consider your own safety in an emergency such as a fire B Never put yourself at risk of fatal injury Your own safety must always take the highest priority Risk of damage from operator error Operator errors can lead ...

Page 4: ...tenance B Recommendation sign a maintenance and inspection contract with a qualified heating contractor and have the appliance serviced annually B The owner operator is responsible for the safety and environmental compatibility of the system B Read and follow the safety instructions in the Cleaning and maintenance chapter Original spare parts Damage caused by spare parts not supplied by the manufa...

Page 5: ... Adjustable tank leg leveling bolts 1 Roll of high quality Teflon tape 2 2 Tank installation Select a dry frost free room for installation The tank must not be allowed to freeze or it must be drained or protected appropriately when not in operation The floor must be level and able to carry the weight of the unit When installing the heating boiler and DHW tank observe the minimum clearance requirem...

Page 6: ...e ground and carefully lay the DHW tank 2 on its side B Remove bottom polystyrene pad and pallet Install the adjustable feet M10 x 30 3 Fig 3 DHW tank on polystyrene cover pad illustrative 1 Polystyrene cover pad 2 DHW Tank 3 Adjustable feet B Place the DHW tank upright B Dispose of the DHW tank packaging in an environmentally responsible manner NOTICE Take care not to damage the tank when moving ...

Page 7: ... water outlet EK Cold water inlet VS Tank coil supply RS Tank coil return MB Hot water temperature sensor or Aquastat EL Drain 6 720 648 100 13 1ITL MB EK RS VS 1 MB EL EL AB 20 37 3 4 1 20 508 mm 37 940 mm 3 4 1 19 25 mm Type VS RS EK AB Sacrificial anode Weight empty Lbs kg 120 NPT NPT NPT G 1 158 72 Table 2 Dimensions and connections ...

Page 8: ...am and downstream of the shut off valve 3 Attach a tag with the following statement to the safety valve 4 Do not close drain line During heating water may be released for safety reasons Fig 6 Installation illustrative 1 Storage tank 2 Purge valve 3 Shut off valve with drain 4 Pressure and temperature safety valve 5 Flow check valve 6 Shut off valve 7 DHW recirculation pump optional 8 Pressure redu...

Page 9: ...ved and listed pressure and temperature relief valves of the proper size for the output of the tank 5 3 Temperature monitoring control options Install a temperature sensor or an Aquastat on the DHW tank to measure and monitor the hot water temperature 5 3 1 Installing the temperature sensor B Feed the temperature sensor 2 with the spring 1 into the sensor well 3 Fig 7 Installing the temperature se...

Page 10: ...ell 3 Ensure that the probe makes contact with the well wall over its entire length B Attach Aquastat 2 to the DHW tank by means of 2 self tapping screws 1 Fig 9 Installing the Aquastat 1 Self tapping screws C ST 4 2x13 mm 2 Aquastat 3 Sensor well 4 Temperature sensor 5 Spring B Replace the cover of the Aquastat DANGER Risk of fatal injury from electric shock B Disconnect all electrical power befo...

Page 11: ...nections Consult the operating instructions supplied with the control unit or boiler standard delivery control unit or boiler for operating information The system should be commissioned by the installer in the presence of the owner operator NOTICE Risk of property damage in the event of improper operation Commissioning with a partially filled tank can destroy the appliance B Check that the DHW tan...

Page 12: ... electric shock B Only trained and certified electricians are permitted to carry out electrical work B Isolate the DHW tank electrically by using the emergency shut off switch or by disengaging the heating system circuit breaker B Secure the DHW tank against unintentional reconnection B Please observe all installation instructions WARNING Risk of equipment damage from improper maintenance Lack of ...

Page 13: ...ce B Seal the plug 3 back into the inspection port Fig 12 Installing removing the magnesium anode 1 Plastic plugs 2 Magnesium anode 27 mm wrench required 3 Inspection port plug 24 mm socket B Start up the system again B Check all threaded connections for leaks B Install the plastic plugs 1 at the magnesium anode and inspection port NOTICE Risk of physical damage to the DHW tank if limescale is bro...

Page 14: ...t 63 032 088 1 40 Casing lid white 77 470 110 240 1 50 Self tapping screw DIN 7981 C ST6 3 19 A3T 73 986 10 60 Spring clip 87 182 240 810 1 70 Fill drain valve 87 185 433 400 1 80 Plastic plug white 87 185 433 390 2 90 Hex head bolt ISO 4017 M10 30 8 8 A3K 7 747 022 050 1 100 Immersion pipe 1 1 4 31 mm long 7 747 020 191 1 110 Immersion pipe 32 813 mm long 7 747 020 190 1 Table 4 Spare parts avail...

Page 15: ...6 720 648 071 2012 03 15 Notes ...

Page 16: ...logy Corp 50 Wentworth Avenue Londonderry NH 03053 U S A Tel 03 552 1100 Fax 603 584 1681 www bosch climate us Bosch Thermotechnology Corp reserves the right to make changes without notice due to continuing engineering and technological advances ...

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