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A.O. Smith ADMR 90 Manual

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Performing maintenance
82 Instruction manual ADMR
15
s
3. Undo the bolts.
4. Remove the lid, the gasket and the O-ring.
5. Inspect the tank and remove the loose scale deposits and contamination.
6. If the scale cannot be removed by hand, descale the appliance with a
descaling agent. Contact the supplier/manufacturer for advice on what
descaling agent to use.
7. Close the cleaning opening. To avoid damage to the tank, tighten the bolts
that fasten the lid with a torque no greater than 50 Nm. Use suitable tools for
this. For the best possible watertight seal of the cleaning opening, the bolts
in the lid should be torqued down in the sequence shown in the figure.
15.3.4 Clean the orifice(s)
1. Detach the orifice(s)
2. Remove all contamination present in the orifice(s).
3. Fit the orifice(s)
15.4 Gas-side
maintenance
15.4.1 Introduction
The following steps must be carried out on the gas side:
1. Clean the burner(s)
.
2. Clean the orifice(s)
.
3. Checking the flue baffles
.
15.4.2 Clean the burner(s)
1. Detach the burner(s)
2. Remove all contamination present on the burner(s).
3. Fit the burner(s)
15.4.3 Checking the flue baffles
Warning
The draught diverter and cover can be hot.
1. Detach the wiring from the flue damper.
2. Withdraw the sensor cable plug from the flue gas sensor.
3. Detach the fastening brackets from the flue gas sensor.
4. Disconnect the draught diverter from the flue gas discharge.
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IMD-0282 R1
… 82 …


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