A.O. Smith GWV - 120 사용자 설명서

Instruction manual GWV

55

gis

Topics covered in this chapter, in sequence:
•

.

•

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. Switch the electronic controller ON by setting the 

ON/OFF switch to position I.

The display will now show INTERNAL CHECK for 
about 10 seconds and go to the main menu.

5. Press the blue arrow once ( ) to position the 

cursor in front of ON and press 

. The 

display shown in the figure will appear.

6. Confirm the START OPERATION by pressing 

.

The appliance is now in "ON mode". If there is a 
heat demand, the appliance will run through the 
heating cycle

If the heating cycle is not run, there is no heat 
demand; if this is the case, Tset will probably need 
to be set

. 

The appliance's heating cycle is activated when the 
measured water temperature (T

3

) falls below the 

threshold value (T

set

). This set point value depends on 

the currently selected appliance operating mode. If the 
appliance is in the "OFF mode" (frost protection), for 
example, this value is 5°C. If the appliance is in the 
"ON mode", this set point can be selected, for 
example, 65°C.
The heating cycle runs successively through the 
following states:
1. HEAT DEMAND;
2. PRE-PURGE;
3. PRESSURE SWITCH;
4. PRE-GLOW;
5. IGNITION;
6. RUNNING 1;
7. RUNNING 2;
8. POST-PURGE.
The complete cycle is explained in the following 
example, which assumes the appliance is in the basic 
mode ON.

Note
The same heating cycle applies to the other 

operating modes.

INTERNAL CHECK

MENU

 »OFF

^ ON

È WEEK PROGRAM

GENESIS

a

a

 »START OPERATION

^ CHANGE SETPOINT

È

Tset=65ÉC

a