45
TECHNICAL ASSISTANCE SERVICE
ENGLISH
PREPARING FOR INITIAL START-UP
EMPTYING
Switch the electricity supply OFF at the system’s main
switch and at the control panel before starting to empty
the boiler or storage cylinder.
EMPTYING THE CENTRAL HEATING SYSTEM
- Open any non-return valves in the CH circuit to facilitate
emptying.
- Close the shut-off cocks for the water circuit.
- Connect a plastic hose to the hose union on the boiler’s
drain cock (1) and open the cock.
- Close the CH circuit's non-return valves.
ON
OFF
- The water and fuel shut-off cocks must be open.
- With the system cold, the water pressure gauge (3)
must show a pressure
over 1 bar
, with the water circuit
properly de-aerated
- The expansion vessel (fitted on installation) must be
properly pre-charged.
- The cap on the vent valve (2) must be open.
- All electrical connections to the mains supply and to
the system’s control and safety devices must have been
made correctly.
- The flue gas exhaust and flue pipes must have been
correctly installed and connected.
- The pump/s (fitted on installation) must turn freely.
Unscrew the inspection cap and use a flat blade
screwdriver to check that the pump shaft turns smoothly.
- The room unit (if fitted) must be correctly connected
(see the "Electrical connections" section).
b
Protect all electrical devices under the pump before
you unscrew the inspection cap just in case water
comes out.
It is essential to perform the following checks before starting up or testing the functioning of the boiler. In particular, check that:
1
2
3
THC V 35 E OIL BLU
3
2
THC V 55 E OIL BLU
TECHNICAL ASSISTANCE SERVICE
