A.O. Smith ADM - 40 사용자 설명서

Instruction manual ADM

51

gis

Topics covered in this chapter:
•

;

•

Start the appliance as follows:
1. Fill the appliance

.

2. Open

 the manual gas 

valve.

3. Switch on the power to the appliance using the 

isolator between the appliance and the power 
supply.

4. Put the appliance in ON mode by setting the 

ON/OFFswitch on the control panel to position I.

5. Using the control thermostat

, set the desired water temperature.

If there is a heat demand, the appliance will run 
through the heating cycle

The appliance's heating cycle is activated as soon as 
the measured water temperature

 (Twater

) falls below 

the threshold value (T

set

). This threshold value 

depends on the currently selected appliance operating 
mode. For example, if the appliance is in OFF mode 
(frost protection), then this value is 20°C. If the 
appliance is in ON mode, for example, then this 
threshold value can be selected, e.g. position 3 (± 
60°C).
The heating cycle runs successively through the 
following states:
1. HEAT DEMAND;
2. WAIT;
3. PRE-GLOW;
4. IGNITION;
5. RUNNING;
6. WAIT.

The entire cycle is explained in the example below.

Note
The cycle has the same steps when frost 

protection is activated.

1. The control thermostat sensor measures the 

temperature. The water temperature falls below 
the set temperature of (for example) 60°C, causing 
the control thermostat to close. The burner control 
now detects a demand and starts the heating 
cycle.

2. Following demand, the wait period starts. This wait 

ensures that the ignition is safe. The wait period 
lasts approximately 15 seconds.

3. Once the wait period has elapsed (there is audible 

‘clicking’ of the relay in the burner control), the 
PRE-GLOW starts.

4. After about 12 seconds (pre)glowing, the gas 

control opens and ignition takes place.

5. After ignition, the flame is detected and the 

appliance will be running. This means that actual 
heating has started.

6. When the water reaches the set temperature, the 

demand ceases. The gas control closes and the 
burner tray is extinguished. A new wait period of 
about 10 seconds starts.

7. At the end of this wait, the appliance enters the idle 

state, and waits until the water temperature once 
more falls below the set temperature.

With any subsequent heat demand, the heating cycle 
will resume from step 1.