Instruction manual GWV 55
gis
9 Starting and running
9.1 Introduction
Topics covered in this chapter, in sequence:
• Starting and running.
• The appliance's heating cycle.
9.2 Starting and running
Start the appliance as follows:
1. Fill the appliance (5 "Filling").
2. Open (3.5 "Installation diagram") 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 (2.3 "The appliance's 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 (11.4 "Setting the water temperature").
9.3 The appliance's heating cycle
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
GEN ES IS
IMD-
11 R1
a
a
»START OPERATION
^ CHANGE SETPOINT
È Tset=65ÉC
a
