Technical data
34
turning it counterclockwise and bleed the circuit. Once the circuit has stopped
gurgling, close the cock and remove the hose.
During manual bleeding, any liquid which has been bled out of the circuit must be
replaced with the charging pump. Make sure that the circuit pressure is 1-2 bar on
completion of the following procedure.
Stop the circuit operating, close the charging cock with a athead screwdriver 1.
and close the automatic bleed valve on the circuit.
Disconnect the volumetric pump, remove the union and replace the ller cap.2.
Close the front panel with its retainer bolts.3.
Restore the appliance and put away the union.4.
Figure 4.4 – Filling the machine's internal circuit
Detailed description of lling procedure.
LEGEND
A manual air vent cock
B pressure gauge
C ller cock *
D hose tting D.13 standard supply
* notch in horizontal position: cock
closed; notch in vertical position: cock open.
4.8 EXHAUSTING THE COMBUSTION PRODUCTS
The appliance, which is supplied in the B53P conguration for installation in the open,
is equipped as standard supply with a DN80 fumes kit (nominal diameter 80 mm), ma-
de by Centrotherm.
The supplied fumes kit must be installed by the installation technician.
The DN80 union for connecting the fumes kit to the appliance is located at the top of
the latter (see Figure 4.5 AY Condensing line, AY series → 35) with a vertical outlet.