Cleaning The Inside Of The 42 And 79 Usg (160 And 300 L) Tanks - Viessmann VITOCELL 300-W Installation, Operating And Service Instructions

Vitocell 300-W/V, EVIA/EVIB Installation, Operating and Service
Cleaning the Inside of the 42 to 79 USG (160 to 300 L) Tanks
Disassembly
Reassembly
WARNING
Water being drained may be hot!
Note: The side clean out / inspection port applies only to the
79 USG (300 L) and the 119 USG (450 L) tanks.
1. Drain domestic water from DHW tank.
2. Remove top panel A insulation mat C and
sensors D and E.
3. Remove cleanout cover G, dome cover H and
gasket K.
4. Remove lower cleanout cover B and insulation C.
5. Remove 8 bolts (M10x25) from flange F and
gasket K.
6. To prevent chemicals from entering piping, disconnect
tank from domestic cold water piping system.
7. Remove loose build-ups with a pressure washer.
8. Remove stubborn build-ups which are resistant to the
pressure washer with a chemical cleaner.
9. Rinse interior of tank thoroughly after use of chemical
cleaners.
CAUTION
Never use a metal brush to clean tank interior or heat
exchanger - only non-metallic material may be used.
WARNING
Never use any cleaners containing muriatic acid.
Follow the manufacturer's instructions and warnings
when utilizing chemical cleaners for deliming and cleaning
devices. Solutions used for cleaning stainless steel
equipment in food processing are usually suitable.
1. Reconnect tank to domestic water piping.
2. Replace gasket K and dome cover H of cleanout
cover C, with a new seal every time tank is opened.
3. Fasten the cleanout cover G using a torque setting
of: Inspection cover, top - 118 lb.ft (160 Nm).
4. Fill tank with domestic cold potable water.
5. Reinstall sensor D and E and top panel A.
6. Replace gasket K, reinstall lower cleanout cover B
and insulation C.
7. Reinstall 8 flange bolts F to a torque of 29.5 lb.ft
(40 Nm).
8. Record the completion of these service procedures
in the Maintenance Record on page 31.
9. Check all connections for leaks. Tighten if necessary.
Service
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