DORCHESTER DR-FC 25, Инструкции по установке, пусконаладке и обслуживанию

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Starting up and shutting down
54 Instruction Manual DR-FC
7
gis
1. The water temperature drops below the set temperature of (for example)
65°C. The control panel detects a heat demand and starts the heating cycle.
-
The
W
icon is activated.
- The message
HEAT DEMAND
appears.
2. Following the heat demand, the fan is powered up and the pre-purge begins.
This lasts about 15 seconds. During this phase, any residual gases are
removed.
-
The
S
icon is activated.
- The message
PRE PURGE
appears.
3. During the pre-purge, the pressure switch closes.
- The
D
icon is activated.
- The message PRESSURE SWITCH appears.
4. After some time, the pre-purge ceases and the control panel reduces the
speed of the fan to the rotational speed for ignition. This is followed by the
pre-glow of the hot surface igniter.
-
The
S
and
D
icons are dimmed.
- The
O
icon is activated.
5. After a number of seconds pre-glow, the gas control is opened and ignition
takes place.
-
The
G
icon is activated.
- The message
IGNITION
appears.
6. After ignition, the flame is detected and the water heater will be running. This
means that actual heating has started. The rotation speed of the fan then
increases to the normal running speed, and the pressure switch will close:
-
The
O
icon is dimmed.
- The
V
and
D
icons are activated.
- The message
RUNNING
appears.
7. Once the water is up to temperature, the heat demand drops off, and the
post-purge starts. This lasts about 25 seconds.
-
The
W
,
G
and
V
icons are dimmed.
- The
S
icon is activated.
- The message
POST PURGE
appears.
ON Ê
13:45 Thursday 63ÉC
Tset 65ÉC
HEAT DEMAND
Figure 7.8 Frost protection cuts
in
ON Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
PRE PURGE
Figure 7.9 Pre-purge
ON Ê Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
PRESSURE SWITCH
Figure 7.10 Pressure switch
ON Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
GLOW PLUG
Figure 7.11 Pre-glow
ON Ê Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
IGNITION
Figure 7.12 Ignition
ON Ê Ê Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
RUNNING
Figure 7.13 Running
ON Ê Ê
13:45 Thursday 65ÉC
Tset 65ÉC
POST PURGE
Figure 7.14 Post-purge