A.O. Smith BFC-120, Installation, User And Service Manual

Page: 25 / 126

4 Use
4.1 Turn on the water heater
Start the water heater as follows:
Fill the water heater (see section 7.9.1).
Open the manual gas valve.
Switch on the power to the water heater using the isolator between the water heater
and the power supply.
Switch the controller ON by setting the control switch to position I.
The display will now show INTERNAL CHECK for about 10 seconds and will then go to
the main menu.
Press once on the blue arrow [ ] to position the cursor beside ON, then press
[ENTER]. The display shown in the figure will appear.
Confirm the selection START OPERATION with [ENTER] .
The appliance is now in ON mode. If there is a heat demand, the appliance will run
through the heating cycle (see section 4.1.1).
If the heating cycle is not run, there is no heat demand; if this is the case, T
set
will
probably need to be set (see section 4.3.3).
4.1.1 The appliance's heating cycle
The entire cycle is explained in the following example, which assumes the water heater is
in operating mode ON.
Note
The same operating cycle applies to the other operating modes.
When the water heater starts, it will run through the following steps:
The water temperature drops below the set temperature of (for example) 65°C. The
controller detects a heat demand and starts the operating cycle.
The icon is activated.
The message HEAT DEMAND appears.
1.
2.
3.
4.
5.
6.
n
1.
-
-
0311753_SGS_28-120_II_UKUK_V2.0 , 2017-05-03 25