A.O. Smith 28 30 50 60, Installation & Service Manual

Page: 85 / 96

Introduction
Release R.1.3 UK 85
s
12 Maintenance
12.1 Introduction
c
Note
Maintenance may only by carried out by an approved service and
maintenance engineer.
At each service, the appliance undergoes maintenance both on the water side
and on the gas side. The maintenance should be carried out in the following
order.
1.
Preparation for maintenance ;
2. Water-side maintenance ;
3. Gas-side maintenance ;
4. Finalising maintenance .
n Remark
Before ordering spare parts, take a moment to write down the appliance type
and model, and the full serial number of the appliance. Only by ordering with
this information can you be sure to receive the correct spare parts. These
details can be found on the rating plate.
12.2 Preparation for
maintenance
To test whether all components are still working properly, you should complete
the following steps:
1. Activate the
MENU
with
B
.
2. Use
H
and
L
to position the cursor beside
OFF
. See Figure 12.1 .
3. Confirm
OFF
with
E
.
4. Wait until the fan has stopped. The
S
icon is then dimmed.
c Note
Failure to wait until the fan stops can cause damage to the appliance.
5. Turn the appliance OFF (position 0) using the ON/OFF switch on the
control panel. See Figure 12.2 .
6. Turn the ThermoControl ON by putting the ON/OFF switch to position I .
MENU
»OFF
^ ON
È WEEK PROGRAM
Figure 12.1 Main menu
Figure 12.2 ThermoControl
0
I
s