Filling The Boiler; Switching The Boiler Off; Prolonged Standstill Of The System. Frost Protection; Servicing Instructions - Baxi Power HT 1.850 Installation, Operation And Maintenance Manual

4. FILLING THE SYSTEM
IT
IMPORTANT: Regularly check that the pressure gauge (1 - figure 17) reads out a pressure of 1 - 1.5 bar when
AT
the central heating system is cold. Open the boiler drain cock (16 - figure 17) to reduce pressure if it is too high.
Open the filling cock to increase pressure if it too low.
Always open the filling cock very slowly to allow any air to bleed off.
GB
If the pressure in the system drops frequently, contact an authorised service centre to have the system chec-
ked.

5. SWITCHING THE BOILER OFF

To shut down the boiler switch off the electrical supply to the appliance.

6. PROLONGED STANDSTILL OF THE SYSTEM. FROST PROTECTION

We recommend you avoid draining the whole system as water replacements engender purposeless and harmful
limestone deposits inside the boiler and on the heating elements.
In case the boiler is not operated during wintertime and is therefore exposed to danger of frost we suggest you
add some specific-purpose anti-freeze to the water contained in the system (e.g.: propylene glycole coupled
with corrosion and scaling inhibitors).
The electronic management of boilers includes a "frost protection" function in the central heating system which
operates the burner to reach a heating flow temperature of 30° C when the system heating flow temperature
drops below 5°C.
The frost protection function is enabled if:
* electrical supply to the boiler is on;
* the gas service cock is open;
* the system pressure is as required;
* the boiler is not blocked.

7. SERVICING INSTRUCTIONS

To maintain efficient and safe operation of your boiler have it checked by a Qualified Service Engineer at the
end of every operating period.
Careful servicing will ensure economical operation of the system.
Do not clean the outer casing of the appliance with abrasive, aggressive and/or easily flammable cleaners
(i.e.: gasoline, alcohol, and so on). Always isolate the electrical supply to the appliance before cleaning it (see
section 5 Turning off the boiler).
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ISTRUCTIONS PERTAINING TO THE USER