A.O. Smith 120 through 250 Series - Manual (Page 51)

Instruction manual BFC 51
gis
8 Status of the
appliance
8.1 Introduction
Topics covered in this chapter:
•
Operating modes ;
• Error conditions ;
• Service condition .
8.2 Operating modes
When running, the appliance has four basic operating
modes, namely:
•
OFF
• ON
• EXTRA
• PROG
8.2.1 OFF
In this mode, the frost protection is activated. The
figure shows the display with the following information:
•
line one: the text OFF;
• line two: the time, the day and alternately (9.3 "The
appliance's heating cycle") T
1
and T
net
.
• lines three and four: the text
FROST PROTECTION ACTIVATED
.
8.2.2 ON
In this mode, the appliance continually responds to the
hot water demand. The figure shows the display with
the following information:
•
line one: the text ON;
• line two: the time, the day and alternately (9.3 "The
appliance's heating cycle") T
1
and T
net
.
• line three: the programmed water temperature
T
set
;
• line four: blank when the appliance is idle, or
depending on the heating cycle
(9.3 "The
appliance's heating cycle") , displays a text such as
HEAT DEMAND .
8.2.3 EXTRA
In this mode, one extra period is programmed and
activated. In this mode, the OFF orPROG mode is
temporarily overruled to fulfil a single period of
demand. Once the period has passed, the appliance
automatically returns to the previous operating mode.
The figure shows the display with the following
information:
•
line one: the text EXTRA;
• line two: the time, the day and alternately (9.3 "The
appliance's heating cycle") T
1
and T
net
;
• line three: the switch-on time, and the related
water temperature setting;
• line four: the text PERIOD ACTIVATED.
OFF
13:45 Thursday 6ÉC
FROST PROTECTION
ACTIVATED
ON
13:45 Thursday 67ÉC
Tset 75ÉC
EXTRA
12:30 Thursday 76ÉC
TH 12:45 Tset 75ÉC
PERIOD ACTIVATED