State Water Heaters SCE 65-400, Installation, User And Service Manual

Page: 61 / 72

Introduction
Release R.1.0 Uk 61
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9
Maintenance
9.1 Introduction
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Note
Maintenance may only by carried out by an approved service and
maintenance engineer.
At each service the appliance should be maintained both on the water side and
on the gas side. The maintenance should be carried out in the following order.
1.
Preparing for maintenance ;
2. Water-side maintenance ;
3. Gas-side maintenance ;
4. Completing maintenance .
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Remark
When ordering spare parts, it is important to note down the appliance type,
appliance model and the full serial number of the appliance. Spare parts
details can be ascertained on the basis of this information. These details can
be located on the rating plate.
9.2 Preparing for
maintenance
To test whether all components are still working properly, you should complete
the following steps:
1. Set the I/0/II-switch on the control panel to the 0 position .
2. Set the control thermostat to the highest position (remember the original
setting) and set the I/0/II- switch back to position I .
3. If there is no heat demand, then drain some water to create a heat demand.
4. Check whether the warm-up cycle is running correctly. See paragraph
’7.4 The appliance's warm-up cycle’ .
5. Set the control thermostat back to the original position and set the I/0/II-
switch back to position I .
6. Check the supply pressure and burner pressure and adjust these, where
necessary. See paragraph ’3.12 Checking the supply pressure and burner
pressure’ .
7. Check on the flue gas outlet system whether all components are attached
properly.
8. Test the operation of the overflow valve for the inlet combination. The water
should spurt out.
9. Test the overflow operation of the T&P valve. The water should spurt out.
10. Check the outlet pipes of the overflow valves and remove any lime residues
that may be present.
11. Drain the appliance. See paragraph ’4.3 Draining the appliance’ .
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