Strebel ML 125 GT, Техническое руководство

Страница: 11 / 19

10
4.4 ELECTRICAL CONNECTION
The electrical system in a heating plant
is the subject of numerous regulations, some of which are general in character oth-
ers being specific to the type of application or type of fuel. Observe all regulations
4.5 CONTROL PANEL
The control panel supplied with the boilers is made of self-extinguishing plastic and houses the regulation and safety
instruments:
LEGEND
1 PANEL LIVE
2 BURNER SWITCH N. 1
4 HEATING PUMP SWITCH
7 BOILER THERMOMETER
8 BOILER LIMIT THERMOSTAT
9 SAFETY LIMIT THERMOSTAT
11 2
nd
FLAME THERMOSTAT
The upper part of the control panel can be rotated to gain access to the terminal board and uncoil the thermostat
and thermometer capillaries. A copy of the wiring diagram is contained inside the control panel cover.
The
control thermostats (TR1-TR2)
have an operating range from 0° to 90° and can be set by the user by means of the
front dial.
Safety limit thermostats (TS)
has a fixed setting of 100 (+0/-6)°C and can be manually reset.
For correct installation, refer to the boiler casing assembly instructions.
4.6 STARTING
Open the gas valve (check if there is any gas leakage).
Switch on the burner, heating pump and the control panel.
At this point if the water temperature inside the boiler is less that the value set up on the control thermostat
and all controls are calling the burner and the pump will run.
NB. It is common to find air inside the gas pipe-work, especially during the initial start up the gas supply pipework
should be vented according to very strict regulations..
Check the all pumps are running.
CONNECTION LIVE/NEUTRAL
If the connections of the live and the neutral are not correct the burner could stop at the end of the
safety time (even if the burner is running).