A.O. Smith 120 through 250 Series, Installation, User And Service Manual

Page: 73 / 104

Instruction manual BFC 71
is
Temporarily raising the setpoint during
FULL
LOAD
or
PARTIAL LOAD
1. :>:
SERVICE OPERATION
.
2. Select
FULL LOAD
or
PARTIAL LOAD
.
The example below describes the situation for
FULL LOAD
, which is identical to that for
PARTIAL LOAD
.
3. Confirm with .
4. To create a heat demand, you can temporarily
raise the set point using to e.g. 70
o
C.
5. Confirm with .
6. After adjusting for the CO
2
value (3.11.3 "CO
2
adjustment"), you must use to restore the set
point to its original value.
7. Press twice to return to the
MENU
menu via the
SERVICE OPERATION
menu.
12.9 Setting legionella prevention
To prevent infection with legionella bacteria, the water
heater heats the water to 65 °C once per week, for 1
hour. This period is adjustable. By default, this period
is set to Monday from 02:00 to 03:00 hours.
12.9.1 Switching legionella prevention on
and off
To switch legionella prevention on or off, select:
•
:
ANTI LEGIONELLA
• Select
NO
to switch legionella prevention off.
• Select
YES
to switch legionella prevention on. The
following screen appears:
• Select
START
to activate the period currently
displayed.
The following display appears. This display
indicates that legionella prevention is switched on.
12.9.2 Changing legionella prevention
start time
If you wish to change the start time, select:
:
ANTI LEGIONELLA
|
YES
|
Change
The following display appears.
• Now set the day and time the same way as
described for setting an extra period in the week
menu (11.10.1 "Programming an extra period"). In
this case however, the pump will be automatically
started.
• Select
START
to start.
SERVICE OPERATION
»FULL LOAD
PARTIAL LOAD
SERVICE Ê Ê Ê
FULL LOAD 47ÉC
Tset 65ÉC
RUNNING
SERVICE Ê Ê Ê
FULL LOAD 47ÉC
Tset 70ÉC
RUNNING
MENU
»OFF
^ ON
È
WEEK PROGRAM
EXTRA PERIOD
SETTINGS
a
a
ANTI LEGIONELLA
»YES
NO
ON MO 02:00 LEG
OFF MO 03:00
Tset 65ÉC
»START Change
LEG Ê Ê Ê
02:45 Monday 60ÉC
MO 03:00 Tset 65ÉC
RUNNING
ON »MO 02:00 LEG
OFF MO 03:00
Tset 65ÉC
START
a