Accessing The Boiler; Flushing Out The Primary Side - PENSOTTI PCH 18 Instruction Manual

6.3 Accessing the boiler

All maintenance operations require one or more of
the boiler casing panels to be removed.
The side panels can only be removed after the
front panel has been removed.
Front panel:

Remove the fixing screws at the lower edge of
the front panel.

Grasp the lower part of the panel and pull it
outwards (see fig. 1) and then up (see fig. 2).
Left and right side panel:

Remove the fixing screws at the front and
lower edge of the side panel to remove.

Grasp the bottom of the panel, move it
sideways and then upwards to remove it.
To access the electrical connections of the
control panel, proceed as follows:
Remove the front panel (see fig. 1 and fig. 2).
Grasp the left and right control panel support
brackets (see fig. 5) and pull them outwards, at
the same time rotating the panel downwards.
Unscrew the four fixing screws (see fig. 6) and
remove the panel back piece.

6.4 Flushing out the primary side

Fill the boiler as per the filling instructions.
Using a drain off cock on the lowest point of
the system allow the water to drain from the
system and boiler.
In order to flush the system correctly turn off
all radiators open the filling loop and drain
cock simultaneously and allow the water to
flow through the boiler.
Open each individual radiator allowing water
to flow through then turn that radiator off and
repeat for all radiators on the system.
Turn off the filling loop and close the drain
cock open all radiators and open the filling to
fill the system.
Continue to fill the system until the pressure
gauge reaches 14.5 psi (1.0 bar).
MAINTENANCE INSTRUCTIONS
37
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5 Fig. 6