Installation manual

14
BERTELLI automatics function
If there is a short-circuited space thermostat, the pump keeps running ( though the boiler is switched off). The
pump runs because the boiler still receives the demand on heating and drives the water into the system.
Even if the boiler is switched off by the space thermostat the pumps runs after that for 180 seconds..
Parasitic flame ( the ionisation detects the flame before the ignition) can happen at the situations like the gas
valve failure. When it is asked to light the boiler the ignition does not start. The upper red LED is blinking , the
middle green LED is alight and the lower red LED is off. After the removal of fault the boiler is in the normal
regime.
OFF ON
JP 1 Natural gas propane – butane
JP 3 Anti-cycling function: between switching
off and switching on by CH water
temperature it is waited for 180 seconds.
It is switched on immediately after the
CH water temperature has dropped below
the set value.
JP 4 Water is heated according to the setting The floor heating, maximum CH
temperature = 40°C
JP 5 After the HSW heating has been switched
off the pump runs for 0,4 – 2 seconds . It
depends on CH water temperature.
The pump runs always for 2 seconds
after the HSW termination.
Anti-cyclic function - JP3 is inactivated, it functions in the way that if the water temperature in CH has
switched off the boiler and this temperature drops quickly the boiler will not start immediately. This is the
waiting time lasting for 180 seconds. Only after this time has passed the normal ignition comes through. This
function prevents the boiler from working only in the short circuited current and keeping switching on and
switching off (according to CH temperature). If during this time there is a HSW requirement the ignition will be
immediate.
JP2 short circuit will disqualify this function . Then the boiler responds continually, lights up immediately after
CH water temperature has dropped ( if the space thermostat is switched on).
The pump after-running after HSW requirement termination - if JP5 is disconnected , by the automatics the
CH water temperature after HSW heating termination is evaluated and depending on this temperature the pump
starts up for the time between 0,4 and 2 s. (higher temperature = long time) in order to cool down the heat
exchanger. If JP5 is connected the pump after running time is always 2 seconds (it does not depend on the
temperature).
Technical data of GMF control unit
Supply:
Supply voltage 230V +10% -15%
Internal protective fuse 2F 250VAC
Resistance against the ground
10 mΩ
Functional parameters :
Temperature range -20°C +60°C
HSW setting range +35°C +60°C
Switching on temperature of HSW temperature
limitation function
70°C
Temperature setting range in CH +30°C +80°C
Temperature setting range in floor heating +20°C +40°C
CH switching off temperature +35°C +85°C
CH switching on temperature +25°C +75°C
Thermostat ∆T
10 K
Time function against frequent switching on 0 - 180 s
Switching on temperature against the freezing function 8°C
Slow ignition timing 2 s
Current to modulator - natural gas 45 – 220 mA + 7,5 %
Current to modulator - PB 65 – 310 mA + 7,5%